Annotation of /MITgcm/tools/genmake2

#! /usr/bin/env bash
#
# $Header: /u/gcmpack/MITgcm/tools/genmake2,v 1.200 2009/11/30 21:50:35 jmc Exp $
#
# Makefile generator for MITgcm UV codes
#   created  by cnh 03/98
#   adapted  by aja 06/98
#   modified by aja 01/00
#   rewritten in bash by eh3 08/03

# Search for particular CPP #cmds associated with packages
# usage: test_for_package_in_cpp_options CPP_file package_name
test_for_package_in_cpp_options() {
    cpp_options=$1
    pkg=$2
    test_for_string_in_file $cpp_options "^[ ]*#define.*ALLOW_$pkg[ ]"
    test_for_string_in_file $cpp_options "^[ ]*#undef.*ALLOW_$pkg[ ]"
    test_for_string_in_file $cpp_options "^[ ]*#define.*DISABLE_$pkg[ ]"
    test_for_string_in_file $cpp_options "^[ ]*#undef.*DISABLE_$pkg[ ]"
    test_for_string_in_file $cpp_options "^[ ]*#define.*ALLOW_$pkg$"
    test_for_string_in_file $cpp_options "^[ ]*#undef.*ALLOW_$pkg$"
    test_for_string_in_file $cpp_options "^[ ]*#define.*DISABLE_$pkg$"
    test_for_string_in_file $cpp_options "^[ ]*#undef.*DISABLE_$pkg$"
}

# Search for particular CPP #cmds associated with MPI
# usage: test_for_mpi_in_cpp_eeoptions CPP_file
test_for_mpi_in_cpp_eeoptions() {
    cpp_options=$1
    test_for_string_in_file $cpp_options "^[ ]*#define.*ALLOW_USE_MPI[ ]"
    test_for_string_in_file $cpp_options "^[ ]*#undef.*ALLOW_USE_MPI[ ]"
    test_for_string_in_file $cpp_options "^[ ]*#define.*ALWAYS_USE_MPI[ ]"
    test_for_string_in_file $cpp_options "^[ ]*#undef.*ALWAYS_USE_MPI[ ]"
    test_for_string_in_file $cpp_options "^[ ]*#define.*ALLOW_USE_MPI$"
    test_for_string_in_file $cpp_options "^[ ]*#undef.*ALLOW_USE_MPI$"
    test_for_string_in_file $cpp_options "^[ ]*#define.*ALWAYS_USE_MPI$"
    test_for_string_in_file $cpp_options "^[ ]*#undef.*ALWAYS_USE_MPI$"
}

# Search for particular string in a file. Return 1 if detected, 0 if not
# usage: test_for_string_in_file file string
test_for_string_in_file() {
    file=$1
    strng=$2
    grep -i "$strng" $file > /dev/null 2>&1
    RETVAL=$?
    if test "x${RETVAL}" = x0 ; then
	printf "Error: In $file there is an illegal line: "
        grep -i "$strng" $file
	exit 99
    fi
    return 0
}

# Read the $ROOTDIR/pkg/pkg_groups file and expand any references to
# the package list.
expand_pkg_groups() {
    new_packages=
    PKG_GROUPS=$ROOTDIR"/pkg/pkg_groups"
    if test -r $PKG_GROUPS ; then
	cat $PKG_GROUPS | sed -e 's/#.*$//g' | sed -e 's/:/ : /g' > ./p1.tmp
	cat ./p1.tmp | $AWK '(NF>2 && $2==":"){ print $0 }' > ./p2.tmp
	matched=0
	for i in $PACKAGES ; do
	    line=`grep "^ *$i" ./p2.tmp`
	    RETVAL=$?
	    if test "x$RETVAL" = x0 ; then
		matched=1
		replace=`echo $line | $AWK '{ $1=""; $2=""; print $0 }'`
		echo "    replacing \"$i\" with: $replace"
		new_packages="$new_packages $replace"
	    else
		new_packages="$new_packages $i"
	    fi
	done
	PACKAGES=$new_packages
	rm -f ./p[1,2].tmp
	return $matched
    else
	echo "Warning: can't read package groups definition file: $PKG_GROUPS"
    fi
}

#  Check for broken environments (eg. cygwin, MacOSX w/HFS+) that
#  cannot distinguish [*.F/*.F90] from [*.f/*.f90] files.
check_for_broken_Ff()  {
    #  Do we have defaults for $FS and/or $FS90 ?
    tfs=f
    tfs9=f90
    if test "x$FS" != x ; then
	tfs="$FS"
    fi
    if test "x$FS90" != x ; then
	tfs9="$FS90"
    fi

    #  First check the ability to create a *.F/.f pair.
    cat <<EOF >> genmake_hello.F
      program hello
      write(*,*) 'hi'
      stop
      end
EOF
    cp genmake_hello.F "genmake_hello."$tfs > /dev/null 2>&1
    RETVAL=$?
    if test "x$RETVAL" != x0 ; then
	if test "x$FS" = x ; then
	    FS='for'
	    FS90='fr9'
	    check_for_broken_Ff
	else
	    cat <<EOF 2>&1
ERROR: Your file system cannot distinguish between *.F and *.f files 
  (fails the "cp" test) and this program cannot find a suitable 
  replacement extension.  Please try a different build environment or 
  contact the <MITgcm-support@mitgcm.org> list for help.

EOF
	    exit -1
	fi
	return
    fi
    rm -f genmake_hello.*

    #  Check the ability of ${MAKE} and ${LN} to use the current set
    #  of extensions.
    cat <<EOF >> genmake_hello.F
      program hello
      write(*,*) 'hi'
      stop
      end
EOF
    test -f $MAKEFILE  &&  mv -f $MAKEFILE $MAKEFILE".tst"
    cat <<EOF >> $MAKEFILE
.SUFFIXES:
.SUFFIXES: .$tfs .F
.F.$tfs:
	$LN \$< \$@
EOF
    $MAKE "genmake_hello."$tfs > /dev/null 2>&1
    RETVAL=$?
    if test "x$RETVAL" != x0 -o ! -f "genmake_hello."$tfs ; then
	if test "x$FS" = x ; then
	    FS='for'
	    FS90='fr9'
	    check_for_broken_Ff
	else
	    cat <<EOF 2>&1
ERROR: Your file system cannot distinguish between *.F and *.f files 
  (fails the "make/ln" test) and this program cannot find a suitable 
  replacement extension.  Please try a different build environment or 
  contact the <MITgcm-support@mitgcm.org> list for help.

EOF
	    exit -1
	    return
	fi
    fi
    rm -f genmake_hello.* $MAKEFILE
    test -f $MAKEFILE".tst"  &&  mv -f $MAKEFILE".tst" $MAKEFILE

    #  If we make it here, use the extensions
    FS=$tfs
    FS90=$tfs9
    return
}


look_for_makedepend()  {

    #  The "original" makedepend is part of the Imake system that is
    #  most often distributed with XFree86 or with an XFree86 source
    #  package.  As a result, many machines (eg. generic Linux) do not
    #  have a system-default "makedepend" available.  For those
    #  systems, we have two fall-back options:
    #
    #    1) a makedepend implementation shipped with the cyrus-imapd
    #       package:  ftp://ftp.andrew.cmu.edu/pub/cyrus-mail/
    #
    #    2) a known-buggy xmakedpend shell script
    #
    #  So the choices are, in order:
    #
    #    1) use the user-specified program
    #    2) use a system-wide default
    #    3) locally build and use the cyrus implementation
    #    4) fall back to the buggy local xmakedpend script
    #
    if test "x${MAKEDEPEND}" = x ; then
	which makedepend > /dev/null 2>&1
	RV0=$?
	test -f $MAKEFILE  &&  mv -f $MAKEFILE $MAKEFILE".tst"
	#  echo 'MAKEFILE="'$MAKEFILE'"'
	cat <<EOF >> $MAKEFILE
#   THIS IS A TEST MAKEFILE GENERATED BY "genmake2"
#
#   Some "makedepend" implementations will die if they cannot 
#   find a Makefile -- so this file is here to gives them an 
#   empty one to find and parse.
EOF
	cat <<EOF >> genmake_tc.f
      program test
      write(*,*) 'test'
      stop
      end
EOF
	makedepend genmake_tc.f > /dev/null 2>&1
	RV1=$?
	test -f $MAKEFILE  &&  rm -f $MAKEFILE
	test -f $MAKEFILE".tst"  &&  mv -f $MAKEFILE".tst" $MAKEFILE
	if test "x${RV0}${RV1}" = x00 ; then
	    MAKEDEPEND=makedepend
	else
	    echo "    a system-default makedepend was not found."
	    
	    #  Try to build the cyrus implementation
	    build_cyrus_makedepend
	    RETVAL=$?
	    if test "x$RETVAL" != x0 ; then
		MAKEDEPEND='$(TOOLSDIR)/xmakedepend'
	    fi
	    rm -f ./genmake_cy_md
	fi
    else
	#  echo "MAKEDEPEND=${MAKEDEPEND}"
	echo "${MAKEDEPEND}" | grep -i cyrus > /dev/null 2>&1
	RETVAL=$?
	if test x"$RETVAL" = x0 ; then
	    build_cyrus_makedepend
	fi
    fi
}


build_cyrus_makedepend()  {
    rm -f ./genmake_cy_md
    (
	cd $ROOTDIR/tools/cyrus-imapd-makedepend  \
	    &&  ./configure > /dev/null 2>&1  \
	    &&  make > /dev/null 2>&1
	if test -x ./makedepend.exe ; then
	    $LN ./makedepend.exe ./makedepend
	fi
	./makedepend ifparser.c > /dev/null 2>&1  \
	    &&  echo "true"
    ) > ./genmake_cy_md
    grep true ./genmake_cy_md > /dev/null 2>&1
    RETVAL=$?
    rm -f ./genmake_cy_md
    if test "x$RETVAL" = x0 ; then
	MAKEDEPEND='$(TOOLSDIR)/cyrus-imapd-makedepend/makedepend'
	return 0
    else
	echo "WARNING: unable to build cyrus-imapd-makedepend"
	return 1
    fi
}


build_embed_encode()
{
    printf "  building the embed-encode utility...  "
    if test ! -e "$ROOTDIR/tools/embed_encode/encode_files" ; then
        if test ! -d "$ROOTDIR/tools/embed_encode" ; then
            echo
            echo "    Error: can't locate \"$ROOTDIR/tools/embed_encode\""
            echo
            EMBED_SRC=f
	    return 1
        fi
	clist="cc gcc c89 $CC"
	for ic in $clist ; do 
	    comm="$ic -o encode_files encode_files.c"
	    ( cd $ROOTDIR/tools/embed_encode && $comm ) > /dev/null 2>&1
	    RETVAL=$?
	    if test "x$RETVAL" = x0 ; then
		echo "OK"
		DEFINES="$DEFINES -DHAVE_EMBED_SRC"
		return 0
	    fi
	done
	echo
	echo "    Error: unable to build $ROOTDIR/embed_encode/encode_files"
	echo "      so it has been disabled"
	echo
	EMBED_SRC=f
	return 1
    fi
    echo "OK"
    DEFINES="$DEFINES -DHAVE_EMBED_SRC"
}


# Guess possible config options for this host
find_possible_configs()  {

    tmp1=`uname`"_"`uname -m`
    tmp2=`echo $tmp1 | sed -e 'y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/'`
    tmp3=`echo $tmp2 | sed -e 's/power macintosh/ppc/'`
    tmp1=`echo $tmp3 | sed -e 's|x86_64|amd64|'`
    tmp2=`echo $tmp1 | sed -e 's/i[3-6]86/ia32/' | sed -e 's/athlon/ia32/'`
    tmp3=`echo $tmp2 | sed -e 's/cray sv1/craysv1/'`
    PLATFORM=$tmp3
    echo $PLATFORM | grep cygwin > /dev/null 2>&1  &&  PLATFORM=cygwin_ia32
    OFLIST=`(cd $ROOTDIR/tools/build_options; ls | grep "^$PLATFORM")`
    echo "  The platform appears to be:  $PLATFORM"
    
    echo "test" > test
    ln -s ./test link
    RETVAL=$?
    if test "x${RETVAL}" = x0 ; then
	LN="ln -s"
    else
	echo "Error: \"ln -s\" does not appear to work on this system!"
	echo "  For help, please contact <MITgcm-support@mitgcm.org>."
	exit 1
    fi
    rm -f test link

    if test "x$CPP" = x ; then
	CPP="cpp -traditional -P"
    fi

    look_for_makedepend

    #================================================================
    #  look for possible C compilers
    tmp="$MITGCM_CC $CC gcc c89 cc c99 mpicc icc"
    p_CC=
    for c in $tmp ; do
	rm -f ./genmake_hello.c  ./genmake_hello
	cat >> genmake_hello.c << EOF
#include <stdio.h>
int main(int argc, char **argv) {
  printf("Hello!\n");
  return 0;
}
EOF
	$c -o genmake_hello genmake_hello.c > /dev/null 2>&1
	RETVAL=$?
	if test "x${RETVAL}" = x0 ; then
	    p_CC="$p_CC $c"
	fi
    done
    rm -f ./genmake_hello.c ./genmake_hello
    if test "x${p_CC}" = x ; then
	cat 1>&2 <<EOF

Error: No C compilers were found in your path.  Please specify one using:

    1) an "optfile" on (eg. "-optfile=path/to/OPTFILE"),
    2) the CC or MITGCM_CC environment variables.

EOF
	exit 1
    else
	echo "  The possible C compilers found in your path are:"
	echo "   "$p_CC
	if test "x$CC" = x ; then
	    CC=`echo $p_CC | $AWK '{print $1}'`
	    echo "  Setting C compiler to: "$CC
	fi
    fi

    #================================================================
    #  look for possible FORTRAN compilers
    tmp="$MITGCM_FC $FC efc g77 f77 pgf77 pgf95 ifc ifort f90 f95 mpif77 mpf77 mpxlf95 gfortran g95"
    p_FC=
    for c in $tmp ; do
	rm -f ./hello.f ./hello
	cat >> hello.f <<EOF
      program hello
      do i=1,3
        print *, 'hello world : ', i
      enddo
      end
EOF
	$c -o hello hello.f > /dev/null 2>&1
	RETVAL=$?
	if test "x${RETVAL}" = x0 ; then
	    p_FC="$p_FC $c"
	fi
    done
    rm -f ./hello.f ./hello
    if test "x${p_FC}" = x ; then
	cat 1>&2 <<EOF

Error: No Fortran compilers were found in your path.  Please specify one using:

    1) an "optfile" on (eg. "-optfile=path/to/OPTFILE"),
    2) a command-line option (eg. "-fc NAME"), or
    3) the FC or MITGCM_FC environment variables.

EOF
	exit 1
    else
	echo "  The possible FORTRAN compilers found in your path are:"
	echo "   "$p_FC
    fi

    #  Use the first of the compilers found in the current PATH
    #  that has a correctly-named optfile
    if test "x$OPTFILE" = x  -a  "x$FC" = x ; then
	for i in $p_FC ; do
	    OPTFILE=$ROOTDIR"/tools/build_options/"$PLATFORM"_"$i
	    if test -r $OPTFILE ; then
		echo "  Setting OPTFILE to: "$OPTFILE
		break
	    fi
	done
    fi

    if test "x$OPTFILE" = x ; then
	OPTFILE=$ROOTDIR"/tools/build_options/"$PLATFORM"_"$FC
	if test ! -r $OPTFILE ; then
             echo "  I looked for the file "$OPTFILE" but did not find it"
        fi
    fi
#    echo "  The options file:  $p_OF"
#    echo "    appears to match so we'll use it."
#   for i in $p_FC ; do
#p_OF=$ROOTDIR"/tools/build_options/"$PLATFORM"_"$i
#if test -r $p_OF ; then
#    OPTFILE=$p_OF
#    echo "  The options file:  $p_OF"
#    echo "    appears to match so we'll use it."
#    break
#fi
#   done
    if test "x$OPTFILE" = x ; then
	cat 1>&2 <<EOF

Error: No options file was found in:  $ROOTDIR/tools/build_options/
  that matches this platform ("$PLATFORM") and the compilers found in
  your path.  Please specify an "optfile" using:

    1) the command line (eg. "-optfile=path/to/OPTFILE"), or
    2) the MITGCM_OF environment variable.

  If you need help, please contact the developers at <MITgcm-support@mitgcm.org>.

EOF
	exit 1
    fi
    
#     # look for possible MPI libraries
#     mpi_libs=
#     mpi_fort=`which mpif77 2>/dev/null`
#     RETVAL=$?
#     if test "x${RETVAL}" = x0 ; then
# 	cat >>test.f <<EOF
#       PROGRAM HELLO
#       DO 10, I=1,10
#       PRINT *,'Hello World'
#    10 CONTINUE
#       STOP
#       END
# EOF
# 	eval "$mpi_fort -showme test.f > out"
# 	RETVAL=$?
# 	if test "x${RETVAL}" = x0 ; then
# 	    a=`cat out`
# 	    for i in $a ; do
# 		case $i in 
# 		    -*)
# 			mpi_libs="$mpi_libs $i" ;;
# 		esac
# 	    done
# 	    echo "The MPI libs appear to be:"
# 	    echo "  "$mpi_libs
# 	fi
# 	rm -f test.f out
#     fi

}

#  Parse the package dependency information
get_pdepend_list()  {

    #  strip the comments and then convert the dependency file into
    #  two arrays: PNAME, DNAME
    cat $1 | sed -e 's/#.*$//g' \
	| $AWK 'BEGIN{nn=0;} (NF>0){ for(i=2;i<=NF;i++){nn++; print "PNAME["nn"]="$1"\nDNAME["nn"]="$i} }' \
	> ./.pd_tmp
    . ./.pd_tmp
    rm -f ./.pd_tmp

    printf "PNAME = "${}
}


#  Explain usage
usage()  {
cat <<EOF

Usage: "$0" [OPTIONS]
  where [OPTIONS] can be:

    -help | --help | -h | --h
          Print this help message and exit.

    -adoptfile NAME | --adoptfile NAME | -adof NAME | --adof NAME
      -adoptfile=NAME | --adoptfile=NAME | -adof=NAME | --adof=NAME
          Use "NAME" as the adoptfile.  By default, the file at
          "tools/adjoint_options/adjoint_default" will be used.

    -nooptfile | --nooptfile
      -optfile NAME | --optfile NAME | -of NAME | --of NAME
      -optfile=NAME | --optfile=NAME | -of=NAME | --of=NAME
          Use "NAME" as the optfile.  By default, an attempt will be
          made to find an appropriate "standard" optfile in the 
          tools/build_options/ directory.

    -pdepend NAME | --pdepend NAME
      -pdepend=NAME | --pdepend=NAME
          Get package dependency information from "NAME".

    -pdefault NAME | --pdefault NAME
      -pdefault=NAME | --pdefault=NAME
          Get the default package list from "NAME".

    -make NAME | -m NAME
      --make=NAME | -m=NAME
          Use "NAME" for the MAKE program. The default is "make" but 
          many platforms, "gmake" is the preferred choice.

    -makefile NAME | -mf NAME
      --makefile=NAME | -mf=NAME
          Call the makefile "NAME".  The default is "Makefile".

    -makedepend NAME | -md NAME
      --makedepend=NAME | -md=NAME
          Use "NAME" for the MAKEDEPEND program.

    -rootdir NAME | --rootdir NAME | -rd NAME | --rd NAME
      -rootdir=NAME | --rootdir=NAME | -rd=NAME | --rd=NAME
          Specify the location of the MITgcm ROOTDIR as "NAME".
          By default, genamke will try to find the location by 
          looking in parent directories (up to the 5th parent).

    -mods NAME | --mods NAME | -mo NAME | --mo NAME
      -mods=NAME | --mods=NAME | -mo=NAME | --mo=NAME
          Here, "NAME" specifies a list of directories that are 
          used for additional source code.  Files found in the 
          "mods list" are given preference over files of the same 
          name found elsewhere.

    -disable NAME | --disable NAME
      -disable=NAME | --disable=NAME
          Here "NAME" specifies a list of packages that we don't 
          want to use.  If this violates package dependencies, 
          genamke will exit with an error message.

    -enable NAME | --enable NAME
      -enable=NAME | --enable=NAME
          Here "NAME" specifies a list of packages that we wish 
          to specifically enable.  If this violates package 
          dependencies, genamke will exit with an error message.

    -standarddirs NAME | --standarddirs NAME
      -standarddirs=NAME | --standarddirs=NAME
          Here, "NAME" specifies a list of directories to be 
          used as the "standard" code.

    -fortran NAME | --fortran NAME | -fc NAME | --fc NAME
      -fc=NAME | --fc=NAME
          Use "NAME" as the fortran compiler.  By default, genmake 
          will search for a working compiler by trying a list of
          "usual suspects" such as g77, f77, etc.

    -cc NAME | --cc NAME | -cc=NAME | --cc=NAME
          Use "NAME" as the C compiler.  By default, genmake 
          will search for a working compiler by trying a list of
          "usual suspects" such as gcc, c89, cc, etc.

    -[no]ieee | --[no]ieee
          Do or don't use IEEE numerics.  Note that this option 
          *only* works if it is supported by the OPTFILE that 
          is being used.

    -ignoretime | -ignore_time | --ignoretime | --ignore_time
          Ignore all the "wall clock" routines entirely.  This will
          not in any way hurt the model results -- it simply means 
          that the code that checks how long the model spends in 
          various routines will give junk values.

    -ts | --ts
          Produce timing information per timestep
    -papis | --papis
          Produce summary MFlop/s (and IPC) with PAPI per timestep
    -pcls | --pcls
          Produce summary MFlop/s etc. with PCL per timestep
    -foolad | --foolad
          Fool the AD code generator
    -papi | --papi
          Performance analysis with PAPI
    -pcl | --pcl
          Performance analysis with PCL
    -hpmt | --hpmt
          Performance analysis with the HPM Toolkit

    -gsl | --gsl
          Use GSL to control floating point rounding and precision
    -devel | --devel
          Add additional warning and debugging flags for development

    -mpi | --mpi
          Include MPI header files and link to MPI libraries
    -mpi=PATH | --mpi=PATH
          Include MPI header files and link to MPI libraries using MPI_ROOT
          set to PATH. i.e. Include files from \$PATH/include, link to libraries
          from \$PATH/lib and use binaries from \$PATH/bin.

    -omp | --omp
          Activate OpenMP code + use Compiler option OMPFLAG
    -omp=OMPFLAG | --omp=OMPFLAG
          Activate OpenMP code + use Compiler option OMPFLAG

    -es | --es | -embed-source | --embed-source
          Embed a tarball containing the full source code 
          (including the Makefile, etc.) used to build the 
          executable [off by default]

    -bash NAME
          Explicitly specify the Bourne or BASH shell to use

  While it is most often a single word, the "NAME" variables specified 
  above can in many cases be a space-delimited string such as:

    --enable pkg1   --enable 'pkg1 pkg2'   --enable 'pkg1 pkg2 pkg3'
    -mods=dir1   -mods='dir1'   -mods='dir1 dir2 dir3'
    -foptim='-Mvect=cachesize:512000,transform -xtypemap=real:64,double:64,integer:32'

  which, depending upon your shell, may need to be single-quoted.

  For more detailed genmake documentation, please see:

    http://mitgcm.org/devel_HOWTO/

EOF

    exit 1
}

#  Build a CPP macro to automate calling C routines from FORTRAN
get_fortran_c_namemangling()  {

    #echo "FC_NAMEMANGLE = \"$FC_NAMEMANGLE\""
    if test ! "x$FC_NAMEMANGLE" = x ; then
        return 0
    fi

    default_nm="#define FC_NAMEMANGLE(X) X ## _"
    
    cat > genmake_test.c <<EOF
void tcall( char * string ) { tsub( string ); }
EOF
    $MAKE genmake_test.o >> genmake_warnings 2>&1
    RETVAL=$?
    if test "x$RETVAL" != x0 ; then
	FC_NAMEMANGLE=$default_nm
	cat <<EOF>> genmake_errors

WARNING: C test compile fails
WARNING: We'll try to use: FC_NAMEMANGLE='$FC_NAMEMANGLE'
WARNING: Please contact <MITgcm-support@mitgcm.org> if you need help here
EOF
	return 1
    fi
    c_tcall=`nm genmake_test.o 2>/dev/null | grep 'T ' | grep tcall | cut -d ' ' -f 3`
    RETVAL=$?
    if test "x$RETVAL" != x0 ; then
	FC_NAMEMANGLE=$default_nm
	cat <<EOF>> genmake_warnings

WARNING: The "nm" command failed.
WARNING: We'll try to use: FC_NAMEMANGLE='$FC_NAMEMANGLE'
WARNING: Please contact <MITgcm-support@mitgcm.org> if you need help here
EOF
	return 1
    fi
    cat > genmake_tcomp.$FS <<EOF
      subroutine tcall( string )
      character*(*) string
      call tsub( string )
      end
EOF
    $FC $FFLAGS -c genmake_tcomp.$FS >> genmake_warnings 2>&1
    RETVAL=$?
    if test "x$RETVAL" != x0 ; then
	FC_NAMEMANGLE=$default_nm
	cat <<EOF>> genmake_warnings

WARNING: FORTRAN test compile fails -- please see "genmake_errors"
WARNING: We'll try to use: FC_NAMEMANGLE='$FC_NAMEMANGLE'
WARNING: Please contact <MITgcm-support@mitgcm.org> if you need help here.
EOF
	return 1
    fi
    f_tcall=`nm genmake_tcomp.o 2>/dev/null | grep 'T ' | grep tcall | cut -d ' ' -f 3`
    RETVAL=$?
    if test "x$RETVAL" != x0 ; then
	FC_NAMEMANGLE=$default_nm
	cat <<EOF>> genmake_warnings

WARNING: The "nm" command failed.
WARNING: We'll try to use: FC_NAMEMANGLE='$FC_NAMEMANGLE'
WARNING: Please contact <MITgcm-support@mitgcm.org> if you need help here.
EOF
	return 1
    fi

    c_a=`echo $c_tcall | sed -e 's|tcall|Y Y|' | cut -d ' ' -f 1 | sed -e 's|Y||'`
    f_a=`echo $f_tcall | sed -e 's|tcall|Y Y|' | cut -d ' ' -f 1 | sed -e 's|Y||'`
    c_b=`echo $c_tcall | sed -e 's|tcall|Y Y|' | cut -d ' ' -f 2 | sed -e 's|Y||'`
    f_b=`echo $f_tcall | sed -e 's|tcall|Y Y|' | cut -d ' ' -f 2 | sed -e 's|Y||'`

    nmangle="X"
    if test "x$c_a" != "x$f_a" ; then
	comm="echo x$f_a | sed -e 's|x$c_a||'"
	a=`eval $comm`
	nmangle="$a ## $nmangle"
    fi
    if test "x$c_b" != "x$f_b" ; then
	comm="echo x$f_b | sed -e 's|x$c_b||'"
	b=`eval $comm`
	nmangle="$nmangle ## $b"
    fi

    FC_NAMEMANGLE="#define FC_NAMEMANGLE(X)  $nmangle"

    #  cleanup the testing files
    rm -f genmake_tcomp.* genmake_test.*
}


check_HAVE_CLOC()  {
    get_fortran_c_namemangling
    cat <<EOF > genmake_tc_1.c
$FC_NAMEMANGLE
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <assert.h>
#include <sys/time.h>
void FC_NAMEMANGLE(cloc) ( double *curtim )
{
 struct timeval tv1;
 gettimeofday(&tv1 , (void *)NULL );
 *curtim =  (double)((tv1.tv_usec)+(tv1.tv_sec)*1.E6);
 *curtim = *curtim/1.E6;
}
EOF
    COMM="$CC $CFLAGS -c genmake_tc_1.c"
    echo $COMM >> genmake_warnings
    $COMM >> genmake_warnings 2>&1
    RET_C=$?
    cat <<EOF > genmake_tc_2.$FS
      program hello
      REAL*8 wtime
      external cloc
      call cloc(wtime)
      print *," HELLO WORLD", wtime
      end
EOF
    COMM="$FC $FFLAGS -o genmake_tc genmake_tc_2.$FS genmake_tc_1.o"
    echo $COMM >> genmake_warnings
    $COMM >> genmake_warnings 2>&1
    RET_F=$?
    test -x ./genmake_tc  &&  ./genmake_tc >> genmake_warnings 2>&1
    RETVAL=$?
    if test "x$RETVAL" = x0 ; then
	HAVE_CLOC=t
	DEFINES="$DEFINES -DHAVE_CLOC"
    fi
    rm -f genmake_tc*
}


check_HAVE_SIGREG()  {
    if test ! "x$HAVE_SIGREG" = x ; then
	return
    fi
    get_fortran_c_namemangling
    cat <<EOF > genmake_tc_1.c
$FC_NAMEMANGLE
#include <stdlib.h>
#include <stdio.h>
#include <signal.h>
#include <errno.h>
#include <ucontext.h>

int * ip;

static void killhandler(
    unsigned int sn, siginfo_t  si, struct ucontext *sc )
{
    *ip = *ip + 1;
    return;
}

void FC_NAMEMANGLE(sigreg) (int * aip)
{
    struct sigaction s;
    ip = aip;
    s.sa_flags = SA_SIGINFO;
    s.sa_sigaction = (void *)killhandler;
    if(sigaction (SIGTERM,&s,(struct sigaction *)NULL)) {
	printf("Sigaction returned error = %d\n", errno);
	exit(0);
    }
    return;
}
EOF
    COMM="$CC $CFLAGS -c genmake_tc_1.c"
    echo $COMM >> genmake_warnings
    $COMM >> genmake_warnings 2>&1
    RET_C=$?
    cat <<EOF > genmake_tc_2.$FS
      program hello
      integer anint
      common /iv/ anint
      external sigreg
      call sigreg(anint)
      end
EOF
    echo >> genmake_warnings
    echo "running: check_HAVE_SIGREG()" >> genmake_warnings
    cat genmake_tc_2.$FS >> genmake_warnings
    COMM="$FC $FFLAGS -o genmake_tc genmake_tc_2.$FS genmake_tc_1.o"
    echo $COMM >> genmake_warnings
    $COMM >> genmake_warnings 2>&1
    RETVAL=$?
    if test "x$RETVAL" = x0 ; then
	HAVE_SIGREG=t
	DEFINES="$DEFINES -DHAVE_SIGREG"
    fi
    rm -f genmake_tc*
}


check_HAVE_SETRLSTK()  {
    if test "x$HAVE_SETRLSTK" = xt ; then
	DEFINES="$DEFINES -DHAVE_SETRLSTK"
	return
    fi	
    if test ! "x$HAVE_SETRLSTK" = x ; then
	return
    fi
    get_fortran_c_namemangling
    cat <<EOF > genmake_tc_1.c
$FC_NAMEMANGLE
#include <sys/time.h>
#include <sys/resource.h>
#include <unistd.h>
void FC_NAMEMANGLE(setrlstk) ()
{
    struct rlimit rls;
    rls.rlim_cur = RLIM_INFINITY;
    rls.rlim_max = RLIM_INFINITY;
    setrlimit(RLIMIT_STACK, &rls);
    return;
}
EOF
    COMM="$CC $CFLAGS -c genmake_tc_1.c"
    echo $COMM >> genmake_warnings
    $COMM >> genmake_warnings 2>&1
    RET_C=$?
    cat <<EOF > genmake_tc_2.$FS
      program hello
      external setrlstk
      call setrlstk()
      end
EOF
    echo >> genmake_warnings
    echo "running: check_HAVE_SETRLSTK()" >> genmake_warnings
    cat genmake_tc_2.$FS >> genmake_warnings
    COMM="$FC $FFLAGS -o genmake_tc genmake_tc_2.$FS genmake_tc_1.o"
    echo $COMM >> genmake_warnings
    $COMM >> genmake_warnings 2>&1
    RETVAL=$?
    if test "x$RETVAL" = x0 ; then
	HAVE_SETRLSTK=t
	DEFINES="$DEFINES -DHAVE_SETRLSTK"
    fi
    rm -f genmake_tc*
}


check_HAVE_STAT()  {
    get_fortran_c_namemangling
    cat <<EOF > genmake_tc_1.c
$FC_NAMEMANGLE
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
void FC_NAMEMANGLE(tfsize) ( int *nbyte )
{
    char name[512];
    struct stat astat;

    name[0] = 'a'; name[1] = '\0';
    if (! stat(name, &astat))
        *nbyte = (int)(astat.st_size);
    else
        *nbyte = -1;
}
EOF
    COMM="$CC $CFLAGS -c genmake_tc_1.c"
    echo $COMM >> genmake_warnings
    $COMM >> genmake_tc.log 2>&1
    RET_C=$?
    cat <<EOF > genmake_tc_2.$FS
      program hello
      integer nbyte
      call tfsize(nbyte)
      print *," HELLO WORLD", nbyte
      end
EOF
    echo >> genmake_warnings
    echo "running: check_HAVE_STAT()" >> genmake_warnings
    cat genmake_tc_2.$FS >> genmake_warnings
    COMM="$FC $FFLAGS -o genmake_tc genmake_tc_2.$FS genmake_tc_1.o"
    echo $COMM >> genmake_warnings
    $COMM >> genmake_tc.log 2>&1
    RETVAL=$?
    if test "x$RETVAL" = x0 ; then
	HAVE_STAT=t
	DEFINES="$DEFINES -DHAVE_STAT"
    fi
    rm -f genmake_tc*
}


check_netcdf_libs()  {
    if test ! "x$SKIP_NETCDF_CHECK" = x ; then
	return
    fi
    echo >> genmake_warnings
    echo "running: check_netcdf_libs()" >> genmake_warnings
    cat <<EOF > genmake_tnc.F
      program fgennc
#include "netcdf.inc"
EOF
    if test ! "x$MPI" = x ; then
	echo '#include "mpif.h"' >> genmake_tnc.F
    fi
    cat <<EOF >> genmake_tnc.F
      integer iret, ncid, xid
      iret = nf_create('genmake_tnc.nc', NF_CLOBBER, ncid)
      IF (iret .NE. NF_NOERR) write(*,*) NF_STRERROR(iret)
      iret = nf_def_dim(ncid, 'X', 11, xid)
      IF (iret .NE. NF_NOERR) write(*,*) NF_STRERROR(iret)
      iret = nf_close(ncid)
      IF (iret .NE. NF_NOERR) write(*,*) NF_STRERROR(iret)
      end
EOF
    echo "===  genmake_tnc.F  ===" > genmake_tnc.log
    cat genmake_tnc.F >> genmake_tnc.log
    echo "===  genmake_tnc.F  ===" >> genmake_tnc.log
    RET_CPP=f
    COMM="cat genmake_tnc.F | $CPP $DEFINES $INCLUDES"
    echo "$COMM" >> genmake_tnc.log
    eval $COMM > genmake_tnc.$FS 2>/dev/null  &&  RET_CPP=t
    if test "x$RET_CPP" = xf ; then
	echo "  WARNING: CPP failed to pre-process the netcdf test." \
	    >> genmake_tnc.log
	echo "    Please check that \$INCLUDES is properly set." \
	    >> genmake_tnc.log
    fi
    echo "$FC $FFLAGS $FOPTIM -c genmake_tnc.$FS  \ " >> genmake_tnc.log
    echo "  &&  $LINK $FFLAGS $FOPTIM -o genmake_tnc.o $LIBS" >> genmake_tnc.log
    $FC $FFLAGS $FOPTIM -c genmake_tnc.$FS >> genmake_tnc.log 2>&1  \
	&&  $LINK $FFLAGS $FOPTIM -o genmake_tnc genmake_tnc.o $LIBS >> genmake_tnc.log 2>&1
    RET_COMPILE=$?
    cat genmake_tnc.log >> genmake_warnings

    #EH3  Remove test program execution for machines that either disallow
    #EH3  execution or cannot support it (eg. cross-compilers)
    #EH3
    #EH3 test -x ./genmake_tnc  &&  ./genmake_tnc >> genmake_tnc.log 2>&1
    #EH3 RETVAL=$?
    #EH3 if test "x$RET_COMPILE" = x0 -a "x$RETVAL" = x0 ; then

    if test "x$RET_COMPILE" = x0 ; then
	HAVE_NETCDF=t
    else
	# try again with "-lnetcdf" added to the libs
	echo "try again with added '-lnetcdf'" > genmake_tnc.log
	echo "cat genmake_tnc.F | $CPP $DEFINES $INCLUDES > genmake_tnc.$FS \ " >> genmake_tnc.log
	echo " &&  $FC $FFLAGS $FOPTIM -c genmake_tnc.$FS \ " >> genmake_tnc.log
	echo " &&  $LINK $FFLAGS $FOPTIM -o genmake_tnc genmake_tnc.o $LIBS -lnetcdf" >> genmake_tnc.log
	cat genmake_tnc.F | $CPP $DEFINES $INCLUDES > genmake_tnc.$FS 2>/dev/null  \
	    &&  $FC $FFLAGS $FOPTIM -c genmake_tnc.$FS >> genmake_tnc.log 2>&1  \
	    &&  $LINK $FFLAGS $FOPTIM -o genmake_tnc genmake_tnc.o $LIBS -lnetcdf >> genmake_tnc.log 2>&1
	RET_COMPILE=$?
	cat genmake_tnc.log >> genmake_warnings
	if test "x$RET_COMPILE" = x0 ; then
	    LIBS="$LIBS -lnetcdf"
	    HAVE_NETCDF=t
	else
	# try again with "-lnetcdff" added to the libs
	    echo "try again with added '-lnetcdff -lnetcdf'" > genmake_tnc.log
	    echo "cat genmake_tnc.F | $CPP $DEFINES $INCLUDES > genmake_tnc.$FS \ " >> genmake_tnc.log
	    echo " &&  $FC $FFLAGS $FOPTIM -c genmake_tnc.$FS \ " >> genmake_tnc.log
	    echo " &&  $LINK $FFLAGS $FOPTIM -o genmake_tnc genmake_tnc.o $LIBS -lnetcdf" >> genmake_tnc.log
	    cat genmake_tnc.F | $CPP $DEFINES $INCLUDES > genmake_tnc.$FS 2>/dev/null  \
		&&  $FC $FFLAGS $FOPTIM -c genmake_tnc.$FS >> genmake_tnc.log 2>&1  \
		&&  $LINK $FFLAGS $FOPTIM -o genmake_tnc genmake_tnc.o $LIBS -lnetcdff -lnetcdf >> genmake_tnc.log 2>&1
	    RET_COMPILE=$?
	    cat genmake_tnc.log >> genmake_warnings
	    if test "x$RET_COMPILE" = x0 ; then
		LIBS="$LIBS -lnetcdff -lnetcdf"
		HAVE_NETCDF=t
	    fi
	fi
    fi
    rm -f genmake_tnc*
}


###############################################################################
#   Sequential part of script starts here
###############################################################################

#  Set defaults here
COMMANDL="$0 $@"

PLATFORM=
LN=
S64=
KPP=
#FC=
#CC=gcc
#CPP=
LINK=
DEFINES=
PACKAGES=
ENABLE=
DISABLE=
# MAKEFILE=
# MAKEDEPEND=
PDEPEND=
DUMPSTATE=t
PDEFAULT=
OPTFILE=
INCLUDES="-I. $INCLUDES"
FFLAGS=
FOPTIM=
FEXTRAFLAGS=
USE_EXTENDED_SRC=
EXTENDED_SRC_FLAG=
CFLAGS=
KFLAGS1=
KFLAGS2=
#LDADD=
LIBS=
KPPFILES=
NOOPTFILES=
NOOPTFLAGS=
MPI=
MPIPATH=
OMP=
OMPFLAG=
TS=
PAPIS=
PCLS=
FOOLAD=
PAPI=
PCL=
HPMT=
GSL=
DEVEL=
HAVE_TEST_L=

# DEFINES checked by test compilation or command-line
HAVE_SYSTEM=
HAVE_FDATE=
FC_NAMEMANGLE=
HAVE_CLOC=
# HAVE_SETRLSTK=
HAVE_STAT=
HAVE_NETCDF=
HAVE_ETIME=
IGNORE_TIME=

MODS=
TOOLSDIR=
SOURCEDIRS=
INCLUDEDIRS=
STANDARDDIRS="USE_THE_DEFAULT"

G2ARGS=
BASH=
PWD=`pwd`
test "x$MAKE" = x  &&  MAKE=make
test "x$AWK" = x   &&  AWK=awk
EMBED_SRC=
THISHOST=`hostname`
THISCWD=`pwd`
THISDATE=`date`
THISUSER=`echo $USER`
THISVER=
MACHINE=`uname -a`
EXECUTABLE=
EXEHOOK=
EXEDIR=
PACKAGES_CONF=
IEEE=
if test "x$MITGCM_IEEE" != x ; then
    IEEE=$MITGCM_IEEE
fi
FS=
FS90=

AUTODIFF_PKG_USED=f
AD_OPTFILE=
TAF=
AD_TAF_FLAGS=
FTL_TAF_FLAGS=
SVD_TAF_FLAGS=
TAF_EXTRA=
TAMC=
AD_TAMC_FLAGS=
FTL_TAF_FLAGS=
SVD_TAMC_FLAGS=
TAMC_EXTRA=


#  The following state can be set directly by command-line switches
gm_s1="OPTFILE PDEPEND PDEFAULT MAKEFILE PLATFORM ROOTDIR MODS DISABLE ENABLE"
gm_s2="FC CPP IEEE TS PAPIS PCLS PAPI PCL HPMT GSL DEVEL MPI OMP DUMPSTATE STANDARDDIRS"

#  The following state is not directly set by command-line switches
gm_s3="LN S64 KPP LINK PACKAGES MAKEDEPEND PDEPEND PDEFAULT INCLUDES FFLAGS FOPTIM FEXTRAFLAGS"
gm_s4="CFLAGS KFLAGS1 KFLAGS2 LIBS KPPFILES NOOPTFILES NOOPTFLAGS"
gm_s5="TOOLSDIR SOURCEDIRS INCLUDEDIRS PWD MAKE THISHOST THISUSER THISDATE THISVER MACHINE"
gm_s6="EXECUTABLE EXEHOOK EXEDIR PACKAGES_CONF"
gm_s7="HAVE_SYSTEM HAVE_FDATE FC_NAMEMANGLE HAVE_ETIME"

#  The following are all related to adjoint/tangent-linear stuff
gm_s10="AUTODIFF_PKG_USED AD_OPTFILE TAMC TAF AD_TAMC_FLAGS AD_TAF_FLAGS"
gm_s11="FTL_TAMC_FLAGS FTL_TAF_FLAGS SVD_TAMC_FLAGS SVD_TAF_FLAGS"
gm_s12="TAF_EXTRA TAMC_EXTRA"

gm_state="COMMANDL $gm_s1 $gm_s2 $gm_s3 $gm_s4 $gm_s5 $gm_s6 $gm_s7"
gm_state="$gm_state $gm_s10 $gm_s11 $gm_s12"

cat <<EOF

GENMAKE :

A program for GENerating MAKEfiles for the MITgcm project.  For a
quick list of options, use "genmake -h" or for more detail see:

  http://mitgcm.org/devel_HOWTO/

EOF

echo "===  Processing options files and arguments  ==="
gm_local="genmake_local"
printf "  getting local config information:  "
if test -f $gm_local ; then
    echo "using $gm_local"
    . $gm_local
    # echo "DISABLE=$DISABLE"
    # echo "ENABLE=$ENABLE"
else
    echo "none found"
fi

#echo "$0::$1:$2:$3:$4:$5:$6:$7:"
#parse_options
ac_prev=
for ac_option in "$@" ; do

    G2ARGS="$G2ARGS \"$ac_option\""

    # If the previous option needs an argument, assign it.
    if test -n "$ac_prev"; then
	eval "$ac_prev=\$ac_option"
	ac_prev=
	continue
    fi
    
    ac_optarg=`expr "x$ac_option" : 'x[^=]*=\(.*\)'`
    
    case $ac_option in
	
	-help | --help | -h | --h)
	    usage ;;
	
	-nooptfile | --nooptfile)
	    OPTFILE="NONE" ;;
	-optfile | --optfile | -of | --of)
	    ac_prev=OPTFILE ;;
	-optfile=* | --optfile=* | -of=* | --of=*)
	    OPTFILE=$ac_optarg ;;
	
	-adoptfile | --adoptfile | -adof | --adof)
	    ac_prev=AD_OPTFILE ;;
	-adoptfile=* | --adoptfile=* | -adof=* | --adof=*)
	    AD_OPTFILE=$ac_optarg ;;
	
	-pdepend | --pdepend)
	    ac_prev=PDEPEND ;;
	-pdepend=* | --pdepend=*)
	    PDEPEND=$ac_optarg ;;
	
	-pdefault | --pdefault)
	    ac_prev=PDEFAULT ;;
	-pdefault=* | --pdefault=*)
	    PDEFAULT=$ac_optarg ;;
	
	-make | --make | -m | --m)
	    ac_prev=MAKE ;;
	-make=* | --make=* | -m=* | --m=*)
	    MAKE=$ac_optarg ;;
	
	-bash | --bash)
	    ac_prev=BASH ;;
	-bash=* | --bash=*)
	    BASH=$ac_optarg ;;
	
	-makedepend | --makedepend | -md | --md)
	    ac_prev=MAKEDEPEND ;;
	-makedepend=* | --makedepend=* | -md=* | --md=*)
	    MAKEDEPEND=$ac_optarg ;;
	
	-makefile | --makefile | -ma | --ma)
	    ac_prev=MAKEFILE ;;
	-makefile=* | --makefile=* | -ma=* | --ma=*)
	    MAKEFILE=$ac_optarg ;;
	
	-platform | --platform | -pl | --pl | -platform=* | --platform=* | -pl=* | --pl=*)
	    echo "ERROR: The platform option has been removed.  Please specify"
	    echo "  the build options using the \"optfile\" mechanism."
	    echo
	    usage
	    ;;
	
	-rootdir | --rootdir | -rd | --rd)
	    ac_prev=ROOTDIR ;;
	-rootdir=* | --rootdir=* | -rd=* | --rd=*)
	    ROOTDIR=$ac_optarg ;;
	
	-mods | --mods | -mo | --mo)
	    ac_prev=MODS ;;
	-mods=* | --mods=* | -mo=* | --mo=*)
	    MODS=$ac_optarg ;;
	
	-disable | --disable)
	    ac_prev=DISABLE ;;
	-disable=* | --disable=*)
	    DISABLE=$ac_optarg ;;
	
	-enable | --enable)
	    ac_prev=ENABLE ;;
	-enable=* | --enable=*)
	    ENABLE=$ac_optarg ;;
	
	-standarddirs | --standarddirs)
	    ac_prev=STANDARDDIRS ;;
	-standarddirs=* | --standarddirs=*)
	    STANDARDDIRS=$ac_optarg ;;

#	    -cpp | --cpp)
#		ac_prev=cpp ;;
#	    -cpp=* | --cpp=*)
#		CPP=$ac_optarg ;;
	
	-cc | --cc)
	    ac_prev=CC ;;
	-cc=* | --cc=*)
	    CC=$ac_optarg ;;
	
	-fortran | --fortran | -fc | --fc)
	    ac_prev=FC ;;
	-fc=* | --fc=*)
	    FC=$ac_optarg ;;
	
	-fs | --fs)
	    ac_prev=FS ;;
	-fs=* | --fs=*)
	    FS=$ac_optarg ;;
	
	-fs90 | --fs90)
	    ac_prev=FS90 ;;
	-fs90=* | --fs90=*)
	    FS90=$ac_optarg ;;
	
	-ieee | --ieee)
	    IEEE=true ;;
	-noieee | --noieee)
	    IEEE= ;;

	-ts | --ts)
	    TS=true ;;
	-papis | --papis)
	    PAPIS=true ;;
	-pcls | --pcls)
	    PCLS=true ;;
	-foolad | --foolad)
	    FOOLAD=true ;;
	-papi | --papi)
	    PAPI=true ;;
	-pcl | --pcl)
	    PCL=true ;;
	-hpmt | --hpmt)
	    HPMT=true ;;

        -gsl | --gsl)
	    GSL=true ;;

        -devel | --devel)
	    DEVEL=true ;;

	-mpi | --mpi)
	    MPI=true ;;
	-mpi=* | --mpi=*)
	    MPIPATH=$ac_optarg
	    MPI=true ;;
	
 	-omp | --omp)
 	    OMP=true ;;
	-omp=* | --omp=*)
	    OMPFLAG=$ac_optarg
	    OMP=true ;;
	
	-ds | --ds)
	    DUMPSTATE=t ;;
	
	-taf_extra | --taf_extra)
	    ac_prev=TAF_EXTRA ;;
	-taf_extra=* | --taf_extra=*)
	    TAF_EXTRA=$ac_optarg ;;

	-tamc_extra | --tamc_extra)
	    ac_prev=TAMC_EXTRA ;;
	-tamc_extra=* | --tamc_extra=*)
	    TAMC_EXTRA=$ac_optarg ;;
	
	-ignoretime | -ignore_time | --ignoretime | --ignore_time)
	    IGNORE_TIME="-DIGNORE_TIME" ;;

	-es | --es | -embed-source | --embed-source)
	    EMBED_SRC=t ;;

	-*)
	    echo "Error: unrecognized option: "$ac_option
	    usage
	    ;;
	
	*)
	    echo "Error: unrecognized argument: "$ac_option
	    usage
	    ;;
	
    esac
    
done


if test -f ./.genmakerc ; then
    echo
    echo "WARNING: genmake2 has detected a copy of the old-style \"./.genmakerc\""
    echo "  file.  This file format is no longer supported.  For directions on"
    echo "  how to setup and use the new \"genmake2\" script, please see:"
    echo "    http://mitgcm.org/devel_HOWTO/"
    echo "  and send an email to MITgcm-support@mitgcm.org if you need help."
    echo "WARNING: ignore \"./.genmakerc\" and continue."
    echo 
fi

#  Find the MITgcm ${ROOTDIR}
if test "x${ROOTDIR}" = x ; then
    tmp=`echo $PWD | sed -e 's/\// /g' | $AWK '{print $NR}'`
    if test "x$tmp" = "xbin" -a -d ../model -a -d ../eesupp -a -d ../pkg ; then
	ROOTDIR=".."
    else
	for d in . .. ../.. ../../.. ../../../.. ../../../../.. ; do
	    if [ -d "$d/model" -a -d "$d/eesupp" -a -d "$d/pkg" ]; then
		ROOTDIR=$d
		printf "Warning:  ROOTDIR was not specified but there appears to be"
		echo " a copy of MITgcm at \"$ROOTDIR\" so we'll try it."
		break
	    fi
	done
    fi
fi
if test "x${ROOTDIR}" = x ; then
    echo "Error: Cannot determine ROOTDIR for MITgcm code."
    echo "  Please specify a ROOTDIR using either an options "
    echo "  file or a command-line option."
    exit 1
fi
if test ! -d ${ROOTDIR} ; then
    echo "Error: the specified ROOTDIR (\"$ROOTDIR\") does not exist!"
    exit 1
fi

#  Find the MITgcm ${THISVER}
version_file="${ROOTDIR}/doc/tag-index"
if test -f $version_file ; then
    THISVER=`$AWK '/^checkpoint/{print $1; exit}' $version_file`
#-  remove ./BUILD_INFO.h file if older than version_file
    if test -f ./BUILD_INFO.h -a ./BUILD_INFO.h -ot $version_file ; then
	echo "  remove ./BUILD_INFO.h (older than ${version_file})"
	rm -f ./BUILD_INFO.h
    fi
fi

if test "x$MAKEFILE" = x ; then
    MAKEFILE="Makefile"
fi

echo "  getting OPTFILE information:  "
if test "x${OPTFILE}" = x ; then
    if test "x$MITGCM_OF" = x ; then
	echo "Warning: no OPTFILE specified so we'll look for possible settings"
	printf "\n===  Searching for possible settings for OPTFILE  ===\n"
	find_possible_configs
    else
	OPTFILE=$MITGCM_OF
    fi
fi
if test "x$OPTFILE" != xNONE ; then
    if test -f "$OPTFILE" -a -r "$OPTFILE" ; then
	echo "    using OPTFILE=\"$OPTFILE\""
	. "$OPTFILE"
	RETVAL=$?
	if test "x$RETVAL" != x0 ; then
	    printf "Error: failed to source OPTFILE \"$OPTFILE\""
	    echo "--please check that variable syntax is bash-compatible"
	    exit 1
	fi
	if test "x$DUMPSTATE" != xf ; then
	    cp -f $OPTFILE "genmake_optfile"
	fi
    else
	echo "Error: can't read OPTFILE=\"$OPTFILE\""
	exit 1
    fi
fi

echo "  getting AD_OPTFILE information:  "
if test "x${AD_OPTFILE}" = x ; then
    if test "x$MITGCM_AD_OF" = x ; then
	AD_OPTFILE=$ROOTDIR/tools/adjoint_options/adjoint_default
    else
	AD_OPTFILE=$MITGCM_AD_OF
    fi
fi
if test "x${AD_OPTFILE}" != xNONE ; then
    if test -f "$AD_OPTFILE" -a -r "$AD_OPTFILE" ; then
	echo "    using AD_OPTFILE=\"$AD_OPTFILE\""
	. "$AD_OPTFILE"
	RETVAL=$?
	if test "x$RETVAL" != x0 ; then
	    printf "Error: failed to source AD_OPTFILE \"$AD_OPTFILE\""
	    echo "--please check that variable syntax is bash-compatible"
	    exit 1
	fi
	if test "x$DUMPSTATE" != xf ; then
	    cp -f $AD_OPTFILE "genmake_ad_optfile"
	fi
    else
	echo "Error: can't read AD_OPTFILE=\"$AD_OPTFILE\""
	exit 1
    fi
fi

#====================================================================
#  Set default values if not set by the optfile
#
#  Check that FC, CC, LINK, CPP, S64, LN, and MAKE are defined.  If not,
#  either set defaults or complain and abort!
if test ! "x$BASH" = x ; then
    # add a trailing space so that it works within the Makefile syntax (see below)
    BASH="$BASH "
fi
if test "x$FC" = x ; then
    cat <<EOF 1>&2

Error: no Fortran compiler: please specify using one of the following:
  1) within the options file ("FC=...") as specified by "-of=OPTFILE"
  2) the "-fc=XXX" command-line option
  3) the "./genmake_local" file
EOF
    exit 1
fi
if test "x$CC" = x ; then
    CC=cc
#     cat <<EOF 1>&2
# Error: no C compiler: please specify using one of the following:
#   1) within the options file ("CC=...") as specified by "-of=OPTFILE"
#   2) the "-cc=XXX" command-line option
#   3) the "./genmake_local" file
# EOF
#     exit 1
fi
if test "x$LINK" = x ; then
    LINK=$FC
fi
if test "x$MAKE" = x ; then
    MAKE="make"
fi
if test "x$CPP" = x ; then
    CPP=cpp
fi
#EH3 === UGLY ===
#  The following is an ugly little hack to check for $CPP in /lib/ and
#  it should eventually be replaced with a more general function that
#  searches a combo of the user's path and a list of "usual suspects"
#  to find the correct location for binaries such as $CPP.
for i in " " "/lib/" ; do
    echo "#define A a" | $i$CPP > test_cpp 2>&1 && CPP=$i$CPP
done
#EH3 === UGLY ===
echo "#define A a" | $CPP > test_cpp 2>&1
RETVAL=$?
if test "x$RETVAL" != x0 ; then
    cat <<EOF 1>&2

Error: C pre-processor "$CPP" failed the test case: please specify using:

  1) within the options file ("CPP=...") as specified by "-of=OPTFILE"
  2) the "./genmake_local" file
  3) with the CPP environment variable

EOF
    exit 1
else
    rm -f test_cpp
fi
look_for_makedepend
if test "x$LN" = x ; then
    LN="ln -s"
fi
echo "test" > genmake_test_ln
$LN genmake_test_ln genmake_tlink
RETVAL=$?
if test "x$RETVAL" != x0 ; then
    cat <<EOF 1>&2

Error: The command "ln -s" failed -- please specify a working soft-link
  command in the optfile.

EOF
    exit 1
fi
test -L genmake_tlink > /dev/null 2>&1
RETVAL=$?
if test "x$RETVAL" = x0 ; then
    HAVE_TEST_L=t
fi
rm -f genmake_test_ln genmake_tlink

#  Check for broken *.F/*.f handling and fix if possible
check_for_broken_Ff

if test ! "x$MPI" = x ; then
      echo "  Turning on MPI cpp macros"
      DEFINES="$DEFINES -DALLOW_USE_MPI -DALWAYS_USE_MPI"
fi
if test ! "x$OMP" = x ; then
      echo "  Add OMPFLAG and turn on OpenMP cpp macros"
      FFLAGS="$FFLAGS $OMPFLAG"
      F90FLAGS="$F90FLAGS $OMPFLAG"
      DEFINES="$DEFINES -DUSE_OMP_THREADING"
fi

if test ! "x$TS" = x ; then
      echo "  Turning on timing per timestep"
      if test ! "x$FOOLAD" = x ; then
            DEFINES="$DEFINES -DTIME_PER_TIMESTEP_SFP"
      else
	    DEFINES="$DEFINES -DTIME_PER_TIMESTEP"
      fi
      PACKAGES="$PACKAGES showflops"
fi
if test ! "x$PAPIS" = x ; then
      echo "  Turning on PAPI flop summary per timestep"
      echo "  Please make sure PAPIINC, PAPILIB are defined"
      if test ! "x$FOOLAD" = x ; then
	    DEFINES="$DEFINES -DUSE_PAPI_FLOPS_SFP"
      else
	    DEFINES="$DEFINES -DUSE_PAPI_FLOPS"
      fi
      INCLUDES="$INCLUDES $PAPIINC"
      LIBS="$LIBS $PAPILIB"
      PACKAGES="$PACKAGES showflops"
fi
if test ! "x$PCLS" = x ; then
      echo "  Turning on PCL counter summary per timestep"
      echo "  Please make sure PCLINC, PCLLIB are defined"
      if test ! "x$FOOLAD" = x ; then
	    DEFINES="$DEFINES -DUSE_PCL_FLOPS_SFP"
      else
	    DEFINES="$DEFINES -DUSE_PCL_FLOPS"
      fi
      INCLUDES="$INCLUDES $PCLINC"
      LIBS="$LIBS $PCLLIB"
      PACKAGES="$PACKAGES showflops"
fi
if test ! "x$PAPI" = x ; then
      if test ! "x$PAPIS" = x ; then
	  echo "  PAPI performance analysis and flop summary per timestep cannot co-exist!"
	  echo "  Sticking with PAPI flop summary per timestep!"
      else
	  echo "  Turning on performance analysis with PAPI"
          echo "  Please make sure PAPIINC, PAPILIB are defined"
	  DEFINES="$DEFINES -DUSE_PAPI"
	  INCLUDES="$INCLUDES $PAPIINC"
	  LIBS="$LIBS $PAPILIB"
      fi
fi
if test ! "x$PCL" = x ; then
      if test ! "x$PCLS" = x ; then
	  echo "  PCL performance analysis and flop summary per timestep cannot co-exist!"
	  echo "  Sticking with PCL flop summary per timestep!"
      else
	  echo "  Turning on performance analysis with PCL"
          echo "  Please make sure PCLINC, PCLLIB are defined"
	  DEFINES="$DEFINES -DUSE_PCL"
	  INCLUDES="$INCLUDES $PCLINC"
	  LIBS="$LIBS $PCLLIB"
      fi
fi
if test ! "x$HPMT" = x ; then
      if test ! "x$PAPI" = x ; then
	  echo "  PAPI and the HPM Toolkit cannot co-exist!"
	  echo "  Sticking with PAPI!"
      else if test ! "x$PCL" = x ; then
	  echo "  PCL and the HPM Toolkit cannot co-exist!"
	  echo "  Sticking with PCL!"
      else
	  echo "  Turning on performance analysis with the HPM Toolkit"
          echo "  Please make sure HPMTINC, HPMTLIB are defined"
	  DEFINES="$DEFINES -DUSE_LIBHPM"
          INCLUDES="$INCLUDES $HPMTINC"
	  LIBS="$LIBS $HPMTLIB"
      fi
      fi
fi
if test ! "x$GSL" = x ; then
      echo "  Turning on use of GSL to control floating point calculations"
      echo "  Please make sure GSLINC, GSLLIB are defined"
      DEFINES="$DEFINES -DUSE_GSL_IEEE"
      INCLUDES="$INCLUDES $GSLINC"
      LIBS="$LIBS $GSLLIB"
fi
#- if USE_EXTENDED_SRC is set, add EXTENDED_SRC_FLAG to FFLAGS :
if test ! "x$USE_EXTENDED_SRC" = x ; then
      FFLAGS="$FFLAGS $EXTENDED_SRC_FLAG"
      F90FIXEDFORMAT="$F90FIXEDFORMAT $EXTENDED_SRC_FLAG"
fi

printf "\n===  Checking system libraries  ===\n"
printf "  Do we have the system() command using $FC...  "
cat > genmake_tcomp.$FS <<EOF
      program hello
      call system('echo hi')
      end
EOF
$FC $FFLAGS -o genmake_tcomp genmake_tcomp.$FS > genmake_tcomp.log 2>&1
RETVAL=$?
if test "x$RETVAL" = x0 ; then
    HAVE_SYSTEM=t
    DEFINES="$DEFINES -DHAVE_SYSTEM"
    echo "yes"
else
    HAVE_SYSTEM=
    echo "no"
fi
rm -f genmake_tcomp*

printf "  Do we have the fdate() command using $FC...  "
cat > genmake_tcomp.$FS <<EOF
      program hello
      CHARACTER*(128) string
      string = ' '
      call fdate( string )
      print *, string
      end
EOF
$FC $FFLAGS -o genmake_tcomp genmake_tcomp.$FS > genmake_tcomp.log 2>&1
RETVAL=$?
if test "x$RETVAL" = x0 ; then
    HAVE_FDATE=t
    DEFINES="$DEFINES -DHAVE_FDATE"
    echo "yes"
else
    HAVE_FDATE=
    echo "no"
fi
rm -f genmake_tcomp*

printf "  Do we have the etime() command using $FC...  "
cat > genmake_tcomp.$FS <<EOF
      program hello
      REAL*4 ACTUAL, TARRAY(2)
      EXTERNAL ETIME
      REAL*4 ETIME
      actual = etime( tarray )
      print *, tarray
      end
EOF
$FC $FFLAGS -o genmake_tcomp genmake_tcomp.$FS > genmake_tcomp.log 2>&1
RETVAL=$?
if test "x$RETVAL" = x0 ; then
    HAVE_ETIME=t
    DEFINES="$DEFINES -DHAVE_ETIME"
    echo "yes"
else
    HAVE_ETIME=
    echo "no"
fi
rm -f genmake_tcomp*

printf "  Can we call simple C routines (here, \"cloc()\") using $FC...  "
check_HAVE_CLOC
if test "x$HAVE_CLOC" != x ; then
    echo "yes"
else
    echo "no"
    if test "x$EMBED_SRC" = xt ; then
	echo "    WARNING: you requested file embedding but it has"
	echo "      been disabled since C code cannot be called"
	EMBED_SRC=
    fi
fi
rm -f genmake_t*

printf "  Can we unlimit the stack size using $FC...  "
check_HAVE_SETRLSTK
if test "x$HAVE_SETRLSTK" = xt ; then
    echo "yes"
else
    echo "no"
fi
rm -f genmake_t*

printf "  Can we register a signal handler using $FC...  "
check_HAVE_SIGREG
if test "x$HAVE_SIGREG" = xt ; then
    echo "yes"
else
    echo "no"
fi
rm -f genmake_t*

printf "  Can we use stat() through C calls...  "
check_HAVE_STAT
if test "x$HAVE_STAT" != x ; then
    echo "yes"
else
    echo "no"
fi
rm -f genmake_t*

printf "  Can we create NetCDF-enabled binaries...  "
check_netcdf_libs
if test "x$HAVE_NETCDF" != x ; then
    echo "yes"
else
    echo "no"
fi
DEFINES="$DEFINES $IGNORE_TIME"

if test "x$EMBED_SRC" = xt ; then
    build_embed_encode
fi
if test "x$EMBED_SRC" = xt ; then
    ENABLE="$ENABLE embed_files"
fi


printf "\n===  Setting defaults  ===\n"
printf "  Adding MODS directories: "
for d in $MODS ; do
    if test ! -d $d ; then
	echo
	echo "Error: MODS directory \"$d\" not found!"
	exit 1
    else
	printf "$d "
	SOURCEDIRS="$SOURCEDIRS $d"
	INCLUDEDIRS="$INCLUDEDIRS $d"
    fi
done
echo

if test "x${PLATFORM}" = x ; then
    PLATFORM=$p_PLATFORM
fi

if test "x${EXEDIR}" = x ; then
    tmp=`echo $PWD | sed -e 's/\// /g' | $AWK '{print $NR}'`
    if test "x$tmp" = "xbin" -a -d ../exe -a $ROOTDIR = .. ; then
	EXEDIR=../exe
    else
	EXEDIR=.
    fi
fi
if test ! -d ${EXEDIR} ; then
    echo "Error:  the specified EXEDIR (\"$EXEDIR\") does not exist!"
    exit 1
fi

if test "x${TOOLSDIR}" = x ; then
    TOOLSDIR="$ROOTDIR/tools"
fi
if test ! -d ${TOOLSDIR} ; then
    echo "Error: the specified TOOLSDIR (\"$TOOLSDIR\") does not exist!"
    exit 1
fi
if test "x$S64" = x ; then
    echo "3.0 _d 3" | ${TOOLSDIR}/set64bitConst.sh > /dev/null 2>&1
    RETVAL=$?
    if test "x${RETVAL}" = x0 ; then
	S64='$(TOOLSDIR)/set64bitConst.sh'
    else
	echo "3.0 _d 3" | ${TOOLSDIR}/set64bitConst.csh > /dev/null 2>&1
	RETVAL=$?
	if test "x${RETVAL}" = x0 ; then
	    S64='$(TOOLSDIR)/set64bitConst.csh'
	else
	    cat <<EOF

ERROR: neither of the two default scripts:

    ${TOOLSDIR}/set64bitConst.sh
    ${TOOLSDIR}/set64bitConst.csh

  are working so please check paths or specify (with \$S64) a 
  working version of this script.

EOF
	    exit 1
	fi
    fi
fi
THIS_SCRIPT=`echo ${0} | sed 's:'$TOOLSDIR':\$(TOOLSDIR):'`

EXECUTABLE=${EXECUTABLE:-mitgcmuv}

#  We have a special set of source files in eesupp/src which are
#  generated from some template source files. We'll make them first so
#  they appear as regular source code
if test -r $ROOTDIR"/eesupp/src/Makefile" ; then
    echo "  Making source files in eesupp from templates"
    ( cd $ROOTDIR"/eesupp/src/" && $MAKE ) > make_eesupp.errors 2>&1
    RETVAL=$?
    if test "x${RETVAL}" = x0 ; then
	rm -f make_eesupp.errors
    else
	echo "Error: problem encountered while building source files in eesupp:"
	cat make_eesupp.errors 1>&2
	exit 1
    fi
fi

#same for pkg/exch2 and pkg/regrid
for pdir in exch2 regrid ; do
    if test -r $ROOTDIR"/pkg/${pdir}/Makefile" ; then
	echo "  Making source files in pkg/${pdir} from templates"
	( cd $ROOTDIR"/pkg/"${pdir} && $MAKE ) > make_${pdir}.errors 2>&1
	RETVAL=$?
	if test "x${RETVAL}" = x0 ; then
	    rm -f make_${pdir}.errors
	else
	    echo "Error: problem encountered while building source files in pkg/${pdir}:"
	    cat make_${pdir}.errors 1>&2
	    exit 1
	fi
    fi
done

printf "\n===  Determining package settings  ===\n"
if  test "x${PDEPEND}" = x ; then
    tmp=$ROOTDIR"/pkg/pkg_depend"
    if test -r $tmp ; then
	PDEPEND=$tmp
    else
	echo "Warning:  No package dependency information was specified."
	echo "  Please check that ROOTDIR/pkg/pkg_depend exists."
    fi
else
    if test ! -r ${PDEPEND} ; then
	echo "Error:  can't read package dependency info from PDEPEND=\"$PDEPEND\""
	exit 1
    fi
fi
echo "  getting package dependency info from  $PDEPEND"
#  Strip the comments and then convert the dependency file into
#  two arrays: PNAME, DNAME
cat $PDEPEND | sed -e 's/#.*$//g' \
    | $AWK 'BEGIN{nn=-1;} (NF>0){ for(i=2;i<=NF;i++){nn++; print "PNAME_"nn"="$1"\nDNAME_"nn"="$i}} END{print "nname="nn}' \
    > ./.pd_tmp
RETVAL=$?
if test ! "x${RETVAL}" = x0 ; then
    echo "Error: unable to parse package dependencies -- please check PDEPEND=\"$PDEPEND\""
    exit 1
fi
. ./.pd_tmp
rm -f ./.pd_tmp

#  Search for default packages.  Note that a "$ROOTDIR/pkg/pkg_groups"
#  file should eventually be added so that, for convenience, one can 
#  specify groups of packages using names like "ocean" and "atmosphere".
echo "  checking default package list:  "
if test "x${PDEFAULT}" = x ; then
    for i in "." $MODS ; do
	if test -r $i"/packages.conf" ; then
		PDEFAULT=$i"/packages.conf"
		break
	fi
    done
fi
if test "x${PDEFAULT}" = x ; then
    PDEFAULT="$ROOTDIR/pkg/pkg_default"
fi
if test "x${PDEFAULT}" = xNONE ; then
    echo "    default packages file disabled"
else
    if test ! -r $PDEFAULT ; then
	echo "Warning:  can't read default packages from PDEFAULT=\"$PDEFAULT\""
    else
	echo "    using PDEFAULT=\"$PDEFAULT\""
        #  Strip the comments and add all the names
	def=`cat $PDEFAULT | sed -e 's/#.*$//g' | $AWK '(NF>0){print $0}'`
	RETVAL=$?
	if test "x${RETVAL}" != x0 ; then
	    printf "Error: can't parse default package list "
	    echo "-- please check PDEFAULT=\"$PDEFAULT\""
	    exit 1
	fi
	for i in $def ; do
	    PACKAGES="$PACKAGES $i"
	done
	echo "    before group expansion packages are: $PACKAGES"
	RET=1
        while test $RET = 1 ; do expand_pkg_groups; RET=$?; done
	echo "    after group expansion packages are:  $PACKAGES"
    fi
fi

echo "  applying DISABLE settings"
for i in $PACKAGES ; do
    echo $i >> ./.tmp_pack
done
for i in `grep  "-" ./.tmp_pack` ; do
    j=`echo $i | sed 's/[-]//'`
    DISABLE="$DISABLE $j"
done
pack=
for p in $PACKAGES ; do
    addit="t"
    for d in $DISABLE ; do
	if test "x$p" = "x$d" ; then
	    addit="f"
	fi
    done
    if test "x$addit" = xt ; then
	pack="$pack $p"
    fi
done
PACKAGES="$pack"
echo "  applying ENABLE settings"
echo "" > ./.tmp_pack
PACKAGES="$PACKAGES $ENABLE"
# Test if each explicitly referenced package exists
for i in $PACKAGES ; do
    j=`echo $i | sed 's/[-+]//'`
    if test ! -d "$ROOTDIR/pkg/$j" ; then
	echo "Error: can't find package $i at \"$ROOTDIR/pkg/$i\""
 	exit 1
    fi
    echo $i >> ./.tmp_pack
done
PACKAGES=
for i in `grep -v "-" ./.tmp_pack | sort | uniq` ; do
    PACKAGES="$PACKAGES $i"
done
rm -f ./.tmp_pack
echo "    packages are:  $PACKAGES"

#  Check for package MNC: if NetCDF is available, then build the MNC 
#  template files ; otherwise, delete mnc from the list of packages.
echo $PACKAGES | grep ' mnc ' > /dev/null 2>&1
RETVAL=$?
if test "x$RETVAL" = x0 ; then
    if test "x$HAVE_NETCDF" != xt ; then
	cat <<EOF

*********************************************************************
WARNING: the "mnc" package was enabled but tests failed to compile
  NetCDF applications.  Please check that:

  1) NetCDF is correctly installed for this compiler and
  2) the LIBS variable (within the "optfile") specifies the correct 
       NetCDF library to link against.

  Due to this failure, the "mnc" package is now DISABLED.
*********************************************************************

EOF
	PACKAGES=`echo $PACKAGES | sed -e 's/mnc//g'`
	DISABLE="$DISABLE mnc"
    else
	( cd $ROOTDIR"/pkg/mnc" && $MAKE testclean && $MAKE templates ) > make_mnc.errors 2>&1
	RETVAL=$?
	if test "x${RETVAL}" = x0 ; then
	    rm -f make_mnc.errors
	else
	    echo "Error: problem encountered while building source files in pkg/mnc:"
	    cat make_mnc.errors 1>&2
	    exit 1
	fi
    fi
fi

#  Check for package PROFILES: if NetCDF is not available,
#  then delete profiles from the list of available packages.
echo $PACKAGES | grep ' profiles ' > /dev/null 2>&1
RETVAL=$?
if test "x$RETVAL" = x0 ; then
    if test "x$HAVE_NETCDF" != xt ; then
	cat <<EOF

*********************************************************************
WARNING: the "profiles" package was enabled but tests failed to
  compile NetCDF applications.  Please check that:

  1) NetCDF is correctly installed for this compiler and
  2) the LIBS variable (within the "optfile") specifies the correct 
       NetCDF library to link against.

  Due to this failure, the "profiles" package is now DISABLED.
*********************************************************************

EOF
	PACKAGES=`echo $PACKAGES | sed -e 's/profiles//g'`
	DISABLE="$DISABLE profiles"
    fi
fi

echo "  applying package dependency rules"
ck=
while test "x$ck" != xtt ; do
    i=0
    # rtot=${#PNAME[@]}
    rtot=$nname
    while test $i -le $rtot ; do

	#  Is $pname in the current $PACKAGES list?
	#  pname=${PNAME[$i]}
	tmp="pname=\"\$PNAME_$i\""
	eval $tmp
	pin="f"
	for p in $PACKAGES ; do
	    if test "x$p" = "x$pname" ; then
		pin="t"
	    fi
	done

	#  Is the DNAME entry a (+) or (-) rule ?
	tmp="dname=\"\$DNAME_$i\""
	eval $tmp
	plus="-"
	echo $dname | grep '^+' > /dev/null 2>&1
	RETVAL=$?
	if test "x$RETVAL" = x0 ; then
	    plus="+"
	fi

	#  Is $dname in the current $PACKAGES list?
	dname=`echo $dname | sed -e 's/^[+-]//'`
	din="f"
	for p in $PACKAGES ; do
	    if test "x$p" = "x$dname" ; then
		din="t"
	    fi
	done

	#  Do we need to add $dname according to the dependency rules?
	if test "x$pin" = xt -a "x$plus" = "x+" -a "x$din" = xf ; then
            #echo "   " $pname ": need to add :" $dname
	    in_dis="f"
	    for dis in $DISABLE ; do
		if test "x$dis" = "x$dname" ; then
		    in_dis="t"
		fi
	    done
	    if test "x$in_dis" = xt ; then
		echo "Error: can't satisfy package dependencies:"
		echo "  \"$dname\" is required by the dependency rules"
		echo "  but is disallowed by the DISABLE settings"
		exit 1
	    else
		PACKAGES="$PACKAGES $dname"
		ck=
	    fi
	fi

	#  Do we need to get rid of $dname according to the dependency rules?
	if test "x$pin" = xt -a "x$plus" = "x-" -a "x$din" = xt; then
	    echo "Error: can't satisfy package dependencies:"
	    echo "  \"$pname\" was requested but is disallowed by" 
	    echo "  the dependency rules for \"$dname\""
	    exit 1
	fi
        i=`echo "$i + 1" | bc -l`
	#i=$(( $i + 1 ))
    done
    ck=$ck"t"
done
echo "    packages are:  $PACKAGES"
for i in $PACKAGES ; do
    adr="$ROOTDIR/pkg/$i"
    if test -d $adr ; then
	SOURCEDIRS="$SOURCEDIRS $adr"
	INCLUDEDIRS="$INCLUDEDIRS $adr"
	if test "x$i" = xautodiff ; then
	    AUTODIFF_PKG_USED=t
	fi
    else
	echo "Error: the directory \"$adr\" for package $i doesn't exist"
	exit 1
    fi
done

# Create a list of #define and #undef to enable/disable packages
PACKAGES_DOT_H=PACKAGES_CONFIG.h
#  The following UGLY HACK sets multiple "#undef"s and it needs to go 
#  away.  On 2003-08-12, CNH, JMC, and EH3 agreed that the CPP_OPTIONS.h 
#  file would eventually be split up so that all package-related #define
#  statements could be separated and handled only by genmake.
names=`ls -1 "$ROOTDIR/pkg"`
all_pack=
DISABLED_PACKAGES=
for n in $names ; do
    if test -d "$ROOTDIR/pkg/$n" -a "x$n" != xCVS ; then
	has_pack="f"
	for pack in $PACKAGES ; do
	    if test "x$pack" = "x$n" ; then
		has_pack="t"
		break
	    fi
	done
	if test "x$has_pack" = xf ; then
	    undef=`echo "ALLOW_$n" | sed -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'`
            DISABLED_PACKAGES="$DISABLED_PACKAGES -U$undef"
	fi
    fi
done
ENABLED_PACKAGES=
for i in $PACKAGES ; do
    def=`echo "ALLOW_$i" | sed -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'`
    ENABLED_PACKAGES="$ENABLED_PACKAGES -D$def"
#eh3 DEFINES="$DEFINES -D$def"

#EH3  WARNING :  This is an UGLY HACK that needs to be removed!!!
    case $i in 
	aim_v23)
            ENABLED_PACKAGES="$ENABLED_PACKAGES -DALLOW_AIM"
	    echo "Warning: ALLOW_AIM is set to enable aim_v23."
	    ;;
    esac
#EH3  WARNING :  This is an UGLY HACK that needs to be removed!!!

done

echo "  Adding STANDARDDIRS"
BUILDDIR=${BUILDDIR:-.}
if test "x$STANDARDDIRS" = xUSE_THE_DEFAULT ; then
    STANDARDDIRS="eesupp model"
fi
if test "x$STANDARDDIRS" != x ; then
    for d in $STANDARDDIRS ; do
	adr="$ROOTDIR/$d/src"
	if test ! -d $adr ; then
	    echo "Error:  directory $adr not found -- please check that ROOTDIR=\"$ROOTDIR\""
	    echo "  is correct and that you correctly specified the STANDARDDIRS option"
	    exit 1
	else
	    SOURCEDIRS="$SOURCEDIRS $adr"
	fi
	adr="$ROOTDIR/$d/inc"
	if test ! -d $adr ; then
	    echo "Error:  directory $adr not found -- please check that ROOTDIR=\"$ROOTDIR\""
	    echo "  is correct and that you correctly specified the STANDARDDIRS option"
	    exit 1
	else
	    INCLUDEDIRS="$INCLUDEDIRS $adr"
	fi
    done
fi

echo "  Searching for *OPTIONS.h files in order to warn about the presence"
echo "    of \"#define \"-type statements that are no longer allowed:"
CPP_OPTIONS=
CPP_EEOPTIONS=
spaths=". $INCLUDEDIRS"
names=`ls -1 "$ROOTDIR/pkg"`
for i in $spaths ; do
    try="$i/CPP_OPTIONS.h"
    if test -f $try -a -r $try -a "x$CPP_OPTIONS" = x ; then
	echo "    found CPP_OPTIONS=\"$try\""
	CPP_OPTIONS="$try"
        # New safety test: make sure packages are not mentioned in CPP_OPTIONS.h
        for n in $names ; do
            test_for_package_in_cpp_options $CPP_OPTIONS $n
        done
    fi
    try="$i/CPP_EEOPTIONS.h"
    if test -f $try -a -r $try -a "x$CPP_EEOPTIONS" = x ; then
	echo "    found CPP_EEOPTIONS=\"$try\""
        # New safety test: make sure MPI is not determined by CPP_EEOPTIONS.h
#**** not yet enabled ****
#        test_for_mpi_in_cpp_eeoptions $try
#**** not yet enabled ****
	CPP_EEOPTIONS="$try"
    fi
done
if test "x$CPP_OPTIONS" = x ; then
    echo "Error: can't find \"CPP_OPTIONS.h\" in the path list: $spaths"
    exit 1
fi

#  Here, we build the list of files to be "run through" the adjoint
#  compiler.
if test -f ./adSrcFiles.tmp ; then
    rm -f ./adSrcFiles.tmp
fi
echo "  Creating the list of files for the adjoint compiler."
for i in $SOURCEDIRS ; do
    list_files=`( cd $i && ls -1 *.list 2>/dev/null )`
    for j in $list_files ; do
	cat $i/$j >> adSrcFiles.tmp
    done
done
if test ! "x"$FS = "x.f" ; then
    cat adSrcFiles.tmp | sed -e "s/\.f/.$FS/g" > adSrcFiles.tmp_f
    mv -f adSrcFiles.tmp_f adSrcFiles.tmp
fi

echo
echo "===  Creating the Makefile  ==="
echo "  setting INCLUDES"
for i in $INCLUDEDIRS ; do
    if test ! -d $i ; then
	echo "Warning: can't find INCLUDEDIRS=\"$i\""
    fi
done

if test ! "x$DIVA" = x ; then
    echo "  Creating the pseudo-MPI include directory"
    INCLUDES="-I./mpi_headers $INCLUDES"
    rm -rf ./mpi_headers
    mkdir -p ./mpi_headers

    if test "x$MPIINCLUDEDIR" = x ; then
	if test "x$MPIHOME" = x ; then
	    MPIHOME='/usr'
	fi
	MPIINCLUDEDIR='$MPIHOME/include'
    fi
    
    if test -r $MPIINCLUDEDIR/mpif.h ; then
	for i in $MPI_HEADER_FILES; do
	    cp -p $MPIINCLUDEDIR/$i ./mpi_headers
	done

	perl -i -pe 's/MPI_DISPLACEMENT_CURRENT=-1_8/MPI_DISPLACEMENT_CURRENT=-1/g' mpi_headers/mpif.h
    else
	echo " We cannot create a copy of mpif.h!"
#	exit -1
    fi
fi

echo "  Determining the list of source and include files"
rm -rf .links.tmp
mkdir .links.tmp
touch .links.tmp/foo
if test ! -r ".links.tmp/foo" ; then
    echo
    echo "ERROR : something is wrong with your directory permissions or"
    echo "   your user file-creation mask (\"umask\") since creating a"
    echo "   sub-dir, touch-ing a file within it, and then reading it is"
    echo "   not working.  Please try setting your umask to something"
    echo "   sane such as:"
    echo
    echo "      umask 0002"
    echo
    echo "   and please verify that you have the proper permissions for"
    echo "   creating sub-directories and then reading files created"
    echo "   within them."
    echo
    exit 1
fi
rm -f .links.tmp/foo

if test "x$OPENAD" != x ; then 
    OAD_DONT_COMPILE="/dev/null"
    OAD_DONT_TRANSFORM="/dev/null"
    OAD_KEEP_ORIGINAL="/dev/null"
    OAD_CB2M_FILES="/dev/null"
    echo "  looking for dontCompile file:  "
    for i in "." $MODS ; do
	if test -r $i"/dontCompile" ; then
	    OAD_DONT_COMPILE=$i"/dontCompile"
	    echo "     found $OAD_DONT_COMPILE"
	    break
	fi
    done
    echo "  looking for dontTransform file:  "
    for i in "." $MODS ; do
	if test -r $i"/dontTransform" ; then
	    OAD_DONT_TRANSFORM=$i"/dontTransform"
	    echo "     found $OAD_DONT_TRANSFORM"
	    break
	fi
    done
    echo "  looking for keepOriginal file:  "
    for i in "." $MODS ; do
	if test -r $i"/keepOriginal" ; then
	    OAD_KEEP_ORIGINAL=$i"/keepOriginal"
	    echo "     found $OAD_KEEP_ORIGINAL"
	    break
	fi
    done
    echo "  looking for cb2mFiles:  "
    for i in "." $MODS ; do
	if test -r $i"/cb2mFiles" ; then
	    OAD_CB2M_FILES=$i"/cb2mFiles"
	    echo "     found $OAD_CB2M_FILES"
	    break
	fi
    done
    echo "   OpenAD exceptions:  "
fi

echo "# This section creates symbolic links" > srclinks.tmp
echo "" >> srclinks.tmp
printf 'F77_SRC_FILES = ' > F77srclist.tmp
printf 'NON_AD_F77_SRC_FILES = ' > nonADF77srclist.tmp
printf 'C_SRC_FILES = '   > csrclist.tmp
printf 'F90_SRC_FILES = ' > F90srclist.tmp
printf 'H_SRC_FILES = '   > hsrclist.tmp
printf 'AD_FLOW_FILES = ' > ad_flow_files.tmp
alldirs="$SOURCEDIRS $INCLUDEDIRS ."
for d in $alldirs ; do
    deplist=
    sfiles=`( cd $d; echo *.[h,c,F] *.flow )`
    sfiles=`( echo $sfiles; cd $d; echo *.F90 )`
    if test "x$OPENAD" != x ; then 
	sfiles=`( echo $sfiles | grep -v _cb2m\. )`
    fi
    for sf in $sfiles ; do
	if test ! -r ".links.tmp/$sf" ; then
	    if test -f "$d/$sf" ; then
		ignore_f=f
                case $d/$sf in
                  ./$PACKAGES_DOT_H)
			ignore_f=t
			;;
                  ./AD_CONFIG.h)
			ignore_f=t
			;;
                  ./FC_NAMEMANGLE.h)
			ignore_f=t
			;;
                  ./BUILD_INFO.h)
			ignore_f=t
			;;
                  ./EMBEDDED_FILES.h)
			ignore_f=t
			;;
                  *)
			#  For the local directory *ONLY*,
			#  ignore all soft-links
			if test "x$HAVE_TEST_L" = xt -a "x$d" = x. -a -L $sf ; then
			    ignore_f=t
			else
			    touch .links.tmp/$sf
			    deplist="$deplist $sf"
			fi
			;;
                esac
		if test "x$ignore_f" = xf ; then
		    extn=`echo $sf | $AWK -F. '{print $NF}'`
		    case $extn in
		      F)
			echo    " \\"  >> F77srclist.tmp
			printf " $sf" >> F77srclist.tmp
			if test "x$OPENAD" != x ; then 
			    basename=${sf%%.F}
			    isAD=`egrep ^$basename.f'[ 	]*' adSrcFiles.tmp`
			    if test -z "$isAD" ; then 
				toBeIgnored=`egrep ^$basename'[      ]*' ${OAD_DONT_COMPILE}`
				if test -z "$toBeIgnored" ; then 
				    echo    " \\"  >> nonADF77srclist.tmp
				    printf " $sf" >> nonADF77srclist.tmp
				else 
				    echo "    not to be compiled   :  $sf"
				fi
			    else # file is initially listed as an AD file we want to exclude it 
				 # or we want to retain the untransformed version
				notToBeTransformed=`egrep ^$basename'[      ]*' ${OAD_DONT_TRANSFORM}`
				untransformedVersionToBeKept=`egrep ^$basename'[      ]*' ${OAD_KEEP_ORIGINAL}`
				if test -n "$notToBeTransformed"; then 
				    echo "    not to be transformed:  $sf"
				fi
				if test -n "$untransformedVersionToBeKept" ; then
				    echo "    original to be kept  :  $sf"
				fi    
				if test -n "$notToBeTransformed" -o -n "$untransformedVersionToBeKept" ; then
				    echo    " \\"  >> nonADF77srclist.tmp
				    printf " $sf" >> nonADF77srclist.tmp
				fi
			    fi
			fi
			;;
		    F90)
			echo    " \\"  >> F90srclist.tmp
			printf " $sf" >> F90srclist.tmp
			;;
		    c)
			echo    " \\"  >> csrclist.tmp
			printf " $sf" >> csrclist.tmp
			;;
		    h)
			echo    " \\"  >> hsrclist.tmp
			printf " $sf" >> hsrclist.tmp
			;;
  		    flow)
			echo    " \\"  >> ad_flow_files.tmp
			printf " $sf" >> ad_flow_files.tmp
			;;
		   esac
	        fi
	    fi
	fi
    done
    if test "x$deplist" != x ; then
      if test "$d" != "." ; then
  	echo "" >> srclinks.tmp
	echo "#  These files are linked from $d" >> srclinks.tmp
	echo "$deplist :" >> srclinks.tmp
# We need to make sure that the link isn't already there.
# This may happen when make thinks that a header file has to be "remade"
# because a module it depends on has changed.  In this case we do nothing.
	printf "\tif [ ! -L \$@ ]; then \$(LN) %s/\$@ \$@; fi\n" $d >> srclinks.tmp
      fi
    fi
done
rm -rf .links.tmp
echo "" >> F77srclist.tmp
echo "" >> nonADF77srclist.tmp
echo "" >> csrclist.tmp
echo "" >> F90srclist.tmp
echo "" >> hsrclist.tmp
echo "" >> ad_flow_files.tmp

CMDLINE=$0
for xx in "$@" ; do nw=`echo $xx | wc -w`
    if test $nw = '1' ; then CMDLINE="$CMDLINE $xx"
                        else CMDLINE="$CMDLINE '$xx'" ; fi
done

if test -f $MAKEFILE ; then
    mv -f $MAKEFILE "$MAKEFILE.bak"
fi
echo "  Writing makefile: $MAKEFILE"
echo "# Multithreaded + multi-processing makefile for:" > $MAKEFILE
echo "#    $MACHINE" >> $MAKEFILE
echo "# This makefile was generated automatically on" >> $MAKEFILE
echo "#    $THISDATE" >> $MAKEFILE
echo "# by the command:" >> $MAKEFILE
echo "#    $CMDLINE"  >> $MAKEFILE
echo "# executed by:" >> $MAKEFILE
echo "#    ${THISUSER}@${THISHOST}:${THISCWD}" >> $MAKEFILE

EXE_AD=$EXECUTABLE"_ad"
EXE_FTL=$EXECUTABLE"_ftl"
EXE_SVD=$EXECUTABLE"_svd"

cat >>$MAKEFILE <<EOF
#
# OPTFILE="$OPTFILE"
# 
# BUILDDIR     : Directory where object files are written
# SOURCEDIRS   : Directories containing the source (.F) files
# INCLUDEDIRS  : Directories containing the header-source (.h) files
# EXEDIR       : Directory where executable that is generated is written
# EXECUTABLE   : Full path of executable binary
#
# CPP          : C-preprocessor command
# INCLUDES     : Directories searched for header files
# DEFINES      : Macro definitions for CPP
# MAKEDEPEND   : Dependency generator
# KPP          : Special preprocessor command (specific to platform)
# KFLAGS       : Flags for KPP
# FC           : Fortran compiler command
# FFLAGS       : Configuration/debugging options for FC
# FOPTIM       : Optimization options for FC
# LINK         : Command for link editor program
# LIBS         : Library flags /or/ additional optimization/debugging flags

ROOTDIR     = ${ROOTDIR}
BUILDDIR    = ${BUILDDIR}  
SOURCEDIRS  = ${SOURCEDIRS}
INCLUDEDIRS = ${INCLUDEDIRS}
EXEDIR      = ${EXEDIR}
EXECUTABLE  = \$(EXEDIR)/${EXECUTABLE}
TOOLSDIR    = ${TOOLSDIR}

#eh3  new defines for the adjoint work
AUTODIFF    = ${ROOTDIR}/pkg/autodiff
EXE_AD      = ${EXE_AD}
EXE_FTL     = ${EXE_FTL}
EXE_SVD     = ${EXE_SVD}

ENABLED_PACKAGES = ${ENABLED_PACKAGES}
DISABLED_PACKAGES = ${DISABLED_PACKAGES}

# These files are created by Makefile
SPECIAL_FILES = ${PACKAGES_DOT_H} AD_CONFIG.h FC_NAMEMANGLE.h BUILD_INFO.h
EOF

if test "x$EMBED_SRC" = xt ; then
    echo "EMBEDDED_FILES = EMBEDDED_FILES.h" >>$MAKEFILE
else
    echo "EMBEDDED_FILES = " >>$MAKEFILE
fi

cat >>$MAKEFILE <<EOF
# Unix ln (link)
LN = ${LN}
# C preprocessor
CPP = cat \$< | ${S64} | ${CPP}
# Dependency generator
MAKEDEPEND = ${MAKEDEPEND}
# Special preprocessor (KAP on DECs, FPP on Crays)
KPP = ${KPP}
# Fortran compiler
FC = ${FC}
# Fortran compiler
F90C = ${F90C}
# C compiler
CC = ${CC}
# Link editor
LINK = ${LINK} ${LDADD}

# Defines for CPP
DEFINES = ${DEFINES}
# Includes for CPP
INCLUDES = ${INCLUDES}
# Flags for KPP
KFLAGS1 = ${KFLAGS1}
KFLAGS2 = ${KFLAGS2}
# Optim./debug for FC
FFLAGS = ${FFLAGS} ${FEXTRAFLAGS}
FOPTIM = ${FOPTIM}
# Optim./debug for FC
F90FLAGS = ${F90FLAGS}
F90OPTIM = ${F90OPTIM}
F90FIXEDFORMAT = ${F90FIXEDFORMAT}
# Flags for CC
CFLAGS = ${CFLAGS}
# Files that should not be optimized
NOOPTFILES = ${NOOPTFILES}
NOOPTFLAGS = ${NOOPTFLAGS}
# Flags and libraries needed for linking
LIBS = ${LIBS}
# Name of the Mekfile
MAKEFILE=${MAKEFILE}

EOF

cat F77srclist.tmp      >> $MAKEFILE
cat nonADF77srclist.tmp >> $MAKEFILE
cat csrclist.tmp        >> $MAKEFILE
cat F90srclist.tmp      >> $MAKEFILE
cat hsrclist.tmp        >> $MAKEFILE
cat ad_flow_files.tmp   >> $MAKEFILE

rm -f F77srclist.tmp nonADF77srclist.tmp csrclist.tmp F90srclist.tmp hsrclist.tmp ad_flow_files.tmp

echo >> $MAKEFILE

# add definitions for preprocessed sources 
# and note that not all systems allow case sensitive extensions 
# hence the $FS and $FS90 here. 
# for fixed format f90 files we use ff90 or FF90 resp 
# but these are not expected to be the original source files

echo 'F77_PP_SRC_FILES = $(F77_SRC_FILES:.F=.'$FS')'      >> $MAKEFILE
echo 'F90_PP_SRC_FILES = $(F90_SRC_FILES:.F90=.'$FS90')' >> $MAKEFILE
echo 'OBJFILES= $(F77_SRC_FILES:.F=.o) $(C_SRC_FILES:.c=.o) $(F90_SRC_FILES:.F90=.o)' >> $MAKEFILE
echo 'FLOFILES =  $(AD_FLOW_FILES:.flow=.flowdir)' >> $MAKEFILE
echo >> $MAKEFILE
echo '.SUFFIXES:' >> $MAKEFILE
echo '.SUFFIXES: .o .'$FS' .p .F .c .f'$FS90' .'$FS90' .FF90 .F90 .flowdir .flow' >> $MAKEFILE

cat >>$MAKEFILE <<EOF

all: \$(EXECUTABLE)
\$(EXECUTABLE): \$(SPECIAL_FILES) \$(F77_SRC_FILES) \$(C_SRC_FILES) \$(H_SRC_FILES) \$(F90_SRC_FILES) \$(OBJFILES) \$(EMBEDDED_FILES)
	@echo Creating \$@ ...
	\$(LINK) -o \$@ \$(FFLAGS) \$(FOPTIM) \$(OBJFILES) \$(LIBS)
depend:
	@make links
	\$(MAKEDEPEND) -o .$FS \$(DEFINES) \$(INCLUDES) \$(F77_SRC_FILES)
	\$(TOOLSDIR)/f90mkdepend >> \$(MAKEFILE)
	-rm -f makedepend.out

lib: libmitgcmuv.a

libmitgcmuv.a: \$(OBJFILES)
	ar rcv libmitgcmuv.a \$(OBJFILES)
	ar d   libmitgcmuv.a main.o

links: \$(F77_SRC_FILES) \$(C_SRC_FILES) \$(H_SRC_FILES) \$(F90_SRC_FILES) \$(SPECIAL_FILES)

small_f: \$(F77_PP_SRC_FILES) \$(F90_PP_SRC_FILES)

output.txt: \$(EXECUTABLE)
	@printf 'running ... '
	@\$(EXECUTABLE) > \$@

clean:
	-rm -rf *.p *.$FS90 *.mod ${RMFILES} work.{pc,pcl} *.template
	-rm -rf *.o
	-rm -rf *.$FS *.flowdir
	-rm -rf *.f$FS90 \$(AD_CLEAN) ad_input*
Clean:
	@make clean
	@make cleanlinks
	-rm -f \$(SPECIAL_FILES)
	-rm -f genmake_state genmake_*optfile genmake_warnings make.log run.log f90mkdepend.log *.bak
	-rm -f taf_command taf_output taf_ad.log taf_ad_flow.log
CLEAN:
	@make Clean
	-find \$(EXEDIR) -name "*.meta" -exec rm {} \;
	-find \$(EXEDIR) -name "*.data" -exec rm {} \;
	-find \$(EXEDIR) -name "fort.*" -exec rm {} \;
	-rm -f \$(EXECUTABLE) \$(EXE_AD) *.txt STD* *diagnostics.log datetime
	-rm -f *_MIT_CE_000.opt0000 costfunction*0000
	-rm -rf mnc_test_*

#eh3 Makefile: makefile
makefile:
	$THIS_SCRIPT $G2ARGS
cleanlinks:
	-find . -type l -exec rm {} \;

# Special targets (SPECIAL_FILES) which are created by make
${PACKAGES_DOT_H}:
	@echo Creating \$@ ...
	@$BASH\$(TOOLSDIR)/convert_cpp_cmd2defines "Warning - this file is automatically generated - do NOT edit" -bPACKAGES_CONFIG_H "Disabled packages:" \$(DISABLED_PACKAGES) " " "Enabled packages:" \$(ENABLED_PACKAGES) > \$@
AD_CONFIG.h:
	@echo Creating \$@ ...
	@$BASH\$(TOOLSDIR)/convert_cpp_cmd2defines "Warning - this file is automatically generated - do NOT edit" -bAD_CONFIG_H -UALLOW_ADJOINT_RUN -UALLOW_TANGENTLINEAR_RUN -UALLOW_ECCO_OPTIMIZATION > \$@
FC_NAMEMANGLE.h:
	@echo Creating \$@ ...
	echo "$FC_NAMEMANGLE" > \$@

BUILD_INFO.h:
	@echo Creating \$@ ...
EOF

test ! "x$THISVER" = x  && echo "	-echo \"#define THISVER '$THISVER'\" > \$@"   >> $MAKEFILE
test ! "x$THISUSER" = x && echo "	-echo \"#define THISUSER '$THISUSER'\" >> \$@" >> $MAKEFILE
test ! "x$THISDATE" = x && echo "	-echo \"#define THISDATE '$THISDATE'\" >> \$@" >> $MAKEFILE
test ! "x$THISHOST" = x && echo "	-echo \"#define THISHOST '$THISHOST'\" >> \$@" >> $MAKEFILE

if test "x$EMBED_SRC" = xt ; then
    cat >>$MAKEFILE <<EOF

decode_files.o : EMBEDDED_FILES.h

##  \$(F77_PP_SRC_FILES) 
all_fF.tar.gz : \$(SPECIAL_FILES) \$(F77_SRC_FILES) \$(C_SRC_FILES) \$(H_SRC_FILES) \$(F90_SRC_FILES) \$(F77_PP_SRC_FILES) Makefile
	@echo Creating \$@ ...
	-tar -hcf all_fF.tar \$(SPECIAL_FILES) \$(F77_SRC_FILES) \$(C_SRC_FILES) \$(H_SRC_FILES) \$(F90_SRC_FILES) \$(F77_PP_SRC_FILES) Makefile
	-rm -f all_fF.tar.gz
	-gzip all_fF.tar

EMBEDDED_FILES.h : all_fF.tar.gz
	@echo Creating \$@ ...
	-\${ROOTDIR}/tools/embed_encode/encode_files EMBEDDED_FILES.h all_fF.tar.gz

EOF
fi

cat >>$MAKEFILE <<EOF

# The normal chain of rules is (  .F - .$FS - .o  )

## This nullifies any default implicit rules concerning these two file types:
## %.o : %.F

.F.$FS:
	\$(CPP) \$(DEFINES) \$(INCLUDES) > \$@
.$FS.o:
	\$(FC) \$(FFLAGS) \$(FOPTIM) -c \$<
.F90.$FS90:
	\$(CPP) \$(DEFINES) \$(INCLUDES) > \$@
.FF90.f$FS90:
	\$(CPP) \$(DEFINES) \$(INCLUDES) > \$@
.$FS90.o:
	\$(F90C) \$(F90FLAGS) \$(F90OPTIM) -c \$<
.f$FS90.o:
	cp \$< \$(basename  \$<).f90
	\$(F90C) \$(F90FLAGS) \$(F90OPTIM) -c \$(F90FIXEDFORMAT) \$(basename  \$<).f90
.c.o:
	\$(CC) \$(CFLAGS) \$(DEFINES) \$(INCLUDES) -c \$<
.flow.flowdir:
	\$(CPP) \$(DEFINES) \$(INCLUDES) > \$@

# Special exceptions that use the ( .F - .p - .$FS - .o ) rule-chain
.F.p:
	\$(CPP) \$(DEFINES) \$(INCLUDES) > \$@
.p.$FS:
	\$(KPP) \$(KFLAGS1)\$@ \$(KFLAGS2) \$<

EOF

#=========================================
#===  Automatic Differentiation Rules  ===
#===  for TAMC/TAF  ======================

if test "x$OPENAD" = x ; then 

cat >>$MAKEFILE <<EOF

TAMC           = ${TAMC}
TAF            = ${TAF}

TAF_EXTRA      = ${TAF_EXTRA}
TAMC_EXTRA     = ${TAMC_EXTRA}

EOF

ad_vars="AD_TAMC_FLAGS AD_TAF_FLAGS"
ad_vars="$ad_vars FTL_TAMC_FLAGS FTL_TAF_FLAGS"
ad_vars="$ad_vars SVD_TAMC_FLAGS SVD_TAF_FLAGS"
for i in $ad_vars ; do
    name=$i
    t1="t2=\$"`echo "$i"`
    eval $t1
    printf "%-20s = " $name >> $MAKEFILE
    echo "$t2" | sed -e 's| \+| |g' >> $MAKEFILE
done

echo "  Add the source list for AD code generation"
echo >> $MAKEFILE
printf "AD_FILES = " >> $MAKEFILE
AD_FILES=`cat adSrcFiles.tmp`
for i in $AD_FILES ; do
    echo    " \\" >> $MAKEFILE
    printf " $i" >> $MAKEFILE
done
echo >> $MAKEFILE
rm -f adSrcFiles.tmp

cat >>$MAKEFILE <<EOF

# ... AD ...
adall: \$(EXE_AD)
adtaf: ad_taf_output.$FS
adtamc: ad_tamc_output.$FS

ad_input_code.$FS: \$(AD_FILES) \$(H_SRC_FILES) \$(AD_FLOW_FILES)
	@$BASH\$(TOOLSDIR)/convert_cpp_cmd2defines "Warning - this file is automatically generated - do NOT edit" -DALLOW_ADJOINT_RUN -UALLOW_TANGENTLINEAR_RUN -UALLOW_ECCO_OPTIMIZATION > ad_config.template
	cmp ad_config.template AD_CONFIG.h || cat ad_config.template > AD_CONFIG.h
	-rm -f ad_config.template
	@make \$(F77_PP_SRC_FILES)
	@make \$(FLOFILES)
	cat \$(FLOFILES) \$(AD_FILES) | sed -f \$(TOOLSDIR)/remove_comments_sed > ad_input_code.$FS

ad_taf_output.$FS: ad_input_code.$FS
	\$(TAF) \$(AD_TAF_FLAGS) \$(TAF_EXTRA) ad_input_code.$FS
	ls -l ad_input_code_ad.$FS
	cat ad_input_code_ad.$FS | sed -f \$(TOOLSDIR)/adjoint_sed > ad_taf_output.$FS

adtafonly:
	\$(TAF) \$(AD_TAF_FLAGS) \$(TAF_EXTRA) ad_input_code.$FS
	ls -l ad_input_code_ad.$FS
	cat ad_input_code_ad.$FS | sed -f \$(TOOLSDIR)/adjoint_sed > ad_taf_output.$FS

\${EXE_AD}: ad_taf_output.o \$(OBJFILES)
	\$(LINK) -o \${EXE_AD} \$(FFLAGS) \$(FOPTIM) \$(OBJFILES) ad_taf_output.o \$(LIBS) 

ad_tamc_output.$FS: ad_input_code.$FS
	\$(TAMC) \$(AD_TAMC_FLAGS) \$(TAMC_EXTRA) ad_input_code.$FS
	cat ad_input_code_ad.$FS | sed -f \$(TOOLSDIR)/adjoint_sed > ad_tamc_output.$FS

ad_tamc: ad_tamc_output.o \$(OBJFILES)
	\$(LINK) -o ${EXE_AD} \$(FFLAGS) \$(FOPTIM) \$(OBJFILES) ad_tamc_output.o \$(LIBS) 

adonlyfwd:
	patch < \$(TOOLSDIR)/ad_taf_output.f.onlyfwd.diff
 
adtrick:
	patch < \$(TOOLSDIR)/ad_taf_output.f.adtrick.diff

# ... FTL ...
ftlall: ftl_taf
ftltaf: ftl_taf_output.$FS
ftltamc: ftl_tamc_output.$FS

ftl_input_code.$FS: \$(AD_FILES) \$(H_SRC_FILES)
	@$BASH\$(TOOLSDIR)/convert_cpp_cmd2defines "Warning - this file is automatically generated - do NOT edit" -UALLOW_ADJOINT_RUN -DALLOW_TANGENTLINEAR_RUN -UALLOW_ECCO_OPTIMIZATION > ftl_config.template
	cmp ftl_config.template AD_CONFIG.h || cat ftl_config.template > AD_CONFIG.h
	-rm -f ftl_config.template
	@make \$(F77_PP_SRC_FILES)
	@make \$(AD_FLOW_FILES)
	cat \$(AD_FLOW_FILES) \$(AD_FILES) > ftl_input_code.$FS

ftl_taf_output.$FS: ftl_input_code.$FS
	\$(TAF) \$(FTL_TAF_FLAGS) \$(TAF_EXTRA) ftl_input_code.$FS
	ls -l ftl_input_code_ftl.$FS
	cat ftl_input_code_ftl.$FS | sed -f \$(TOOLSDIR)/adjoint_sed > ftl_taf_output.$FS

ftltafonly:
	\$(TAF) \$(FTL_TAF_FLAGS) \$(TAF_EXTRA) ftl_input_code.$FS
	ls -l ftl_input_code_ftl.$FS
	cat ftl_input_code_ftl.$FS | sed -f \$(TOOLSDIR)/adjoint_sed > ftl_taf_output.$FS

ftl_taf: ftl_taf_output.o \$(OBJFILES)
	\$(LINK) -o ${EXE_FTL} \$(FFLAGS) \$(FOPTIM) \$(OBJFILES) ftl_taf_output.o \$(LIBS) 

ftl_tamc_output.$FS: ftl_input_code.$FS
	\$(TAMC) \$(FTL_TAMC_FLAGS) \$(TAMC_EXTRA) ftl_input_code.$FS
	cat ftl_input_code_ftl.$FS | sed -f \$(TOOLSDIR)/adjoint_sed > ftl_tamc_output.$FS

ftl_tamc: ftl_tamc_output.o \$(OBJFILES)
	\$(LINK) -o ${EXE_FTL} \$(FFLAGS) \$(FOPTIM) \$(OBJFILES) ftl_tamc_output.o \$(LIBS) 


# ... SVD ...
svdtaf: ad_taf_output.$FS ftl_taf_output.$FS
	@echo "--->>> Only ran TAF to generate SVD code!    <<<---"
	@echo "--->>> Do make svdall afterwards to compile. <<<---"
svdall: svd_touch svd_taf

svd_taf: \$(OBJFILES)
	\$(LINK) -o mitgcmuv_svd \$(FFLAGS) \$(FOPTIM) \$(OBJFILES) ad_taf_output.o ftl_taf_output.o \$(LIBS)

	@echo "--->>> Only COMPILE svd code! <<<---"
	@echo "--->>> Assumes you previously <<<---"
	@echo "--->>> did make svdtaf        <<<---"

svd_touch:
	@echo "--->>> Only COMPILE svd code! <<<---"
	@echo "--->>> Assumes you previously <<<---"
	@echo "--->>> did make svdtaf        <<<---"
	touch ad_taf_output.$FS ftl_taf_output.$FS
	\$(FC) \$(FFLAGS) \$(FOPTIM) -c ad_taf_output.$FS
	\$(FC) \$(FFLAGS) \$(FOPTIM) -c ftl_taf_output.$FS
	@$BASH\$(TOOLSDIR)/convert_cpp_cmd2defines "Warning - this file is automatically generated - do NOT edit" -UALLOW_ADJOINT_RUN -DALLOW_TANGENTLINEAR_RUN -UALLOW_ECCO_OPTIMIZATION > ftl_config.template
	cmp ftl_config.template AD_CONFIG.h || cat ftl_config.template > AD_CONFIG.h
	-rm -f ftl_config.template

EOF

fi 

#===  for OpenAD  ========================

if test "x$OPENAD" != x ; then 

# ============ begin OpenAD specific section ==============

cat >>$MAKEFILE <<EOF

# all the source files linked from the various locations: 
ALL_LINKED_FILES= \
\$(F77_SRC_FILES) \
\$(C_SRC_FILES) \
\$(H_SRC_FILES) \
\$(F90_SRC_FILES) \
\$(SPECIAL_FILES)

ifndef OPENADROOT
  \$(error "Error:  environment variable OPENADROOT not defined!")
endif

ifndef XAIFSCHEMAROOT
  \$(error "Error:  environment variable XAIFSCHEMAROOT not defined!")
endif

ifndef XAIFBOOSTERROOT
  \$(error "Error:  environment variable XAIFBOOSTERROOT not defined!")
endif

EOF

echo "  Add the source list for common block to module conversion "
echo >> $MAKEFILE
printf "CB2M_F90_SRC_NAMES = " >> $MAKEFILE
for i in `cat ${OAD_CB2M_FILES}` ; do
  echo    " \\" >> $MAKEFILE
  printf " $i" >> $MAKEFILE
done
echo >> $MAKEFILE

echo "  Add the source list for AD code generation"
echo >> $MAKEFILE
printf "AD_FILES = " >> $MAKEFILE
for i in `cat ${OAD_CB2M_FILES}` ; do
  echo    " \\" >> $MAKEFILE
  printf " ${i}_mod.f$FS90" >> $MAKEFILE
done
AD_FILES=`cat adSrcFiles.tmp`
for i in $AD_FILES ; do
  basename=${i%%.f}
  toBeIgnored=`egrep ^$basename'[      ]*' ${OAD_DONT_COMPILE} ${OAD_DONT_TRANSFORM}`
  if test -z "$toBeIgnored" ; then
    echo    " \\" >> $MAKEFILE
    printf " $i" >> $MAKEFILE
  fi
done
echo >> $MAKEFILE
rm -f adSrcFiles.tmp

cat >>$MAKEFILE <<EOF

adAll: \$(EXE_AD) 
.PHONY: adAll

CB2M_F90_PP_SRC_FILES=\$(addsuffix _mod.f$FS90, \$(CB2M_F90_SRC_NAMES))

.PRECIOUS: \$(CB2M_F90_PP_SRC_FILES) \$(NON_AD_F77_SRC_FILES:.F=_cb2m.f$FS90)

.PHONY: adDepend
adDepend: \$(ALL_LINKED_FILES) \$(addsuffix _mod.h, \$(CB2M_F90_SRC_NAMES)) \$(addsuffix _mod.FF90, \$(CB2M_F90_SRC_NAMES)) \$(F77_SRC_FILES:.F=_cb2m.FF90)
	\$(MAKEDEPEND) -o .$FS \$(DEFINES) \$(INCLUDES) \$(F77_SRC_FILES)
	\$(TOOLSDIR)/f90mkdepend >> \$(MAKEFILE)
	-rm -f makedepend.out

OPENAD_SUPPORT_F90_SRC_FILES = \
w2f__types.F90 \
OAD_active.F90 \
OAD_cp.F90 \
OAD_rev.F90 \
OAD_tape.F90         

OPENAD_SUPPORT_C_SRC_FILES = \
iaddr.c \
timeRatio.c

f95_test_mods.f90: \$(OPENAD_SUPPORT_F90_SRC_FILES:F90=$FS90)
	cat \$^ > \$@

f95_test.f90: all_mods.xb.x2w.w2f.pp.f$FS90 \$(NON_AD_F77_SRC_FILES:.F=_cb2m.f$FS90) ad_input_code.w2f.pre.xb.x2w.w2f.td.pp.f$FS90 
	cat \$^ > \$@

f95_test.out: f95_test_mods.f90 f95_test.f90