[MPlayer-dev-eng] [PATCH] configure: remove -Zomf from flags when checking extern symbol prefix on OS/2

[KO Myung-Hun]

OS/2 nm does work only with aout format. If -Zomf is given, gcc generates
OMF object file not aout object file. As a result, nm fails to detect
extern symbol prefix.

This allows users to pass -Zomf to configure via --extra-cflags and/or
--extra-ldfalgs.
---
 configure | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/configure b/configure
index 7a403e0a6..f4c42ad53 100755
--- a/configure
+++ b/configure
@@ -1699,6 +1699,15 @@ msvc_filter_flags() {
   done
 }
 
+os2_aout_filter_flags() {
+  for f; do
+    case $f in
+      -Zomf) ;;
+      *) echo -n $f" " ;;
+    esac
+  done
+}
+
 AR_O='$@'
 CC_O='-o $@'
 CC_LINK_O='-o $@'
@@ -2919,7 +2928,11 @@ echocheck "extern symbol prefix"
 cat > $TMPC << EOF
 int ff_extern;
 EOF
+# OS/2 nm does work only with aout format. Remove -Zomf from flags.
+os2 &&
+  { saved_filter_flags=$filter_flags; filter_flags=os2_aout_filter_flags; }
 cc_check -c || die "Symbol mangling check failed."
+os2 && filter_flags=$saved_filter_flags
 sym=$($_nm -P -g $TMPEXE | grep ff_extern)
 extern_prefix=${sym%%ff_extern*}
 def_extern_asm="#define EXTERN_ASM $extern_prefix"
-- 
2.42.0