1 files changed, 89 insertions, 0 deletions
diff --git a/pd/m4/universal.m4 b/pd/m4/universal.m4
new file mode 100644
index 00000000..8ab7255d
--- /dev/null
+++ b/pd/m4/universal.m4
@@ -0,0 +1,89 @@
+dnl Copyright (C) 2005-2010 IOhannes m zmölnig
+dnl This file is free software; IOhannes m zmölnig
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+# PD_CHECK_UNIVERSAL([VARIABLE-NAME], [ACTION-IF-SUCCESS], [ACTION-IF-NO-SUCCESS])
+# will enable the "--enable-universal=<ARCHS>" flag
+# if <ARCH> is "yes", platform defaults are used
+# the system tries to build a test program with the archs, on succes it calls ACTION-IF-SUCCESS, and ACTION-IF-NO-SUCCESS otherwise
+# on success it will also add the flags to:
+# [VARIABLE-NAME]_CFLAGS will hold a list of cflags to compile for all requested archs
+# [VARIABLE-NAME]_LDFLAGS will hold a list of ldflags to link for all requested archs
+
+AC_DEFUN([PD_CHECK_UNIVERSAL],
+[
+AC_REQUIRE([AC_CANONICAL_HOST])dnl
+
+AC_ARG_ENABLE(universal,
+       [  --enable-universal=<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],
+       [universal_binary=$enableval], [universal_binary=no])
+
+if test "$universal_binary" != no; then
+    AC_MSG_CHECKING([target architectures])
+
+    # Respect TARGET_ARCHS setting from environment if available.
+    if test -z "$TARGET_ARCHS"; then
+     # Respect ARCH given to --enable-universal-binary if present.
+     if test "$universal_binary" != yes; then
+	    TARGET_ARCHS=$(echo "$universal_binary" | tr ',' ' ')
+     else 
+	    # Choose a default set of architectures based upon platform.
+	case $host in
+	*darwin*)
+          TARGET_ARCHS="ppc i386"
+	;;
+	*)
+	  TARGET_ARCHS=""
+	;;
+	esac
+     fi
+    fi
+    AC_MSG_RESULT([$TARGET_ARCHS])
+
+   # /usr/lib/arch_tool -archify_list $TARGET_ARCHS
+   _pd_universal=""
+   for archs in $TARGET_ARCHS 
+   do
+    _pd_universal="$_pd_universal -arch $archs"
+   done
+
+dnl run checks whether the compiler linker like this...
+   if test "x$_pd_universal" != "x"; then
+    tmp_arch_cflags="$CFLAGS"
+    tmp_arch_ldflags="$LDFLAGS"
+    
+    CFLAGS="$CFLAGS $_pd_universal"
+    LDFLAGS="$LDFLAGS $_universal"
+    AC_TRY_LINK([], [return 0;], [
+        if test "x$1" != "x"; then
+	  $1[]_CFLAGS="$[]$1[]_CFLAGS $_pd_universal"
+	  $1[]_LDFLAGS="$[]$1[]_LDFLAGS $_pd_universal"
+	  AC_SUBST($1[]_CFLAGS)
+	  AC_SUBST($1[]_LDFLAGS)
+        fi
+	[$2]
+	], [
+	:
+	[$3]
+	])
+
+    CFLAGS="$tmp_arch_cflags"
+    LDFLAGS="$tmp_arch_ldflags"
+   else
+    :
+   [$3]
+   fi
+else
+ :
+ [$3]
+fi
+])# GEM_CHECK_UNIVERSAL