acinclude with fat-check

svn path=/trunk/externals/iem/iemmatrix/; revision=10995

1 files changed, 52 insertions, 0 deletions

diff --git a/src/acinclude.m4 b/src/acinclude.m4
index 772fecf..30a5080 100644
--- a/src/acinclude.m4
+++ b/src/acinclude.m4
@@ -93,3 +93,55 @@ AC_DEFUN([AC_CHECK_LDFLAGS],
   fi
 ])# AC_CHECK_LDFLAGS
 
+
+AC_DEFUN([AC_CHECK_FAT],
+[
+AC_ARG_ENABLE(fat-binary,
+       [  --enable-fat-binary=ARCHS
+                          build an Apple Multi Architecture Binary (MAB);
+                          ARCHS is a comma-delimited list of architectures for
+                          which to build; if ARCHS is omitted, then the package
+                          will be built for all architectures supported by the
+                          platform (e.g. "ppc,i386" for MacOS/X and Darwin; 
+                          if this option is disabled or omitted entirely, then
+                          the package will be built only for the target 
+                          platform],
+       [fat_binary=$enableval], [fat_binary=no])
+if test "$fat_binary" != no; then
+    AC_MSG_CHECKING([target architectures])
+
+    # Respect TARGET_ARCHS setting from environment if available.
+    if test -z "$TARGET_ARCHS"; then
+   	# Respect ARCH given to --enable-fat-binary if present.
+     if test "$fat_binary" != yes; then
+	    TARGET_ARCHS=`echo "$fat_binary" | tr ',' ' '`
+     else
+	    # Choose a default set of architectures based upon platform.
+      TARGET_ARCHS="ppc i386"
+     fi
+    fi
+    AC_MSG_RESULT([$TARGET_ARCHS])
+
+   define([Name],[translit([$1],[./-], [___])])
+   # /usr/lib/arch_tool -archify_list $TARGET_ARCHS
+   []Name=""
+   for archs in $TARGET_ARCHS 
+   do
+    []Name="$[]Name -arch $archs"
+   done
+
+   if test "x$[]Name" != "x"; then
+    tmp_arch_cflags="$CFLAGS"
+    AC_CHECK_CFLAGS($[]Name,,[]Name="")
+    CFLAGS="$tmp_arch_cflags"
+   fi
+
+   if test "x$[]Name" != "x"; then
+    tmp_arch_ldflags="$LDFLAGS"
+    AC_CHECK_LDFLAGS($[]Name,,[]Name="")
+    LDFLAGS="$tmp_arch_ldflags"
+   fi
+
+   undefine([Name])
+fi
+])# AC_CHECK_FAT