--- MITgcm/tools/build_options/darwin_ia32_gfortran	2008/05/09 00:23:01	1.3
+++ MITgcm/tools/build_options/darwin_ia32_gfortran	2010/03/21 22:22:52	1.10
@@ -1,20 +1,29 @@
 #!/bin/bash
-
-# $Header: /home/ubuntu/mnt/e9_copy/MITgcm/tools/build_options/darwin_ia32_gfortran,v 1.3 2008/05/09 00:23:01 dimitri Exp $
 #
-# tested on MacBook Pro
-# on 28-Nov-2006
+# $Header: /home/ubuntu/mnt/e9_copy/MITgcm/tools/build_options/darwin_ia32_gfortran,v 1.10 2010/03/21 22:22:52 jmc Exp $
+# $Name:  $
+
+# tested on MacBook Pro with Snow Leopard
+# on 20-Nov-2009
+# gcc and gfortran obtained from
+# http://hpc.sourceforge.net/
+# http://prdownloads.sourceforge.net/hpc/gcc-snwleo-intel-bin.tar.gz?download
+# http://prdownloads.sourceforge.net/hpc/gfortran-snwleo-intel-bin.tar.gz?download
 
 CPP='/usr/bin/cpp -traditional -P'
 FC=gfortran
 ###CC=gcc
+#Following flag is needed when using 32-bit gfortran with 64-bit gcc,
+#as can be the case right after switching to Snow Leopard.
+#CFLAGS='-arch i386'
 LINK=gfortran
 NOOPTFLAGS='-O0'
+EXTENDED_SRC_FLAG='-ffixed-line-length-132'
 
 S64='$(TOOLSDIR)/set64bitConst.sh'
 #EH3 MAKEDEPEND='${TOOLSDIR}/xmakedepend'
 #EH3 MAKEDEPEND=makedepend
-DEFINES='-D_BYTESWAPIO -DWORDLENGTH=4 -DNML_TERMINATOR'
+DEFINES='-DWORDLENGTH=4 -DNML_TERMINATOR'
 INCLUDEDIRS='/sw/include'
 INCLUDES='-I/sw/include'
 LIBS='-L/sw/lib'
@@ -29,10 +38,12 @@
 
 #  For IEEE, use the "-ffloat-store" option
 if test "x$IEEE" = x ; then
-    FFLAGS='-Wunused -Wuninitialized -fsecond-underscore'
+    FFLAGS='-Wunused -Wuninitialized -fsecond-underscore -fconvert=big-endian'
     FOPTIM='-O3 -funroll-loops'
+    NOOPTFLAGS='-O2 -funroll-loops'
+    NOOPTFILES='gad_c4_adv_x.F gad_u3_adv_x.F'
 else
-    FFLAGS='-Wunused -ffloat-store -fsecond-underscore'
+    FFLAGS='-Wunused -ffloat-store -fsecond-underscore -fconvert=big-endian'
     FOPTIM='-O0'
 fi