From: Clément Bœsch <u@pkh.me>
Date: Mon, 27 Jun 2016 17:48:21 +0000 (+0200)
Subject: Merge commit 'b2d5d6a7f20a255a5f3c9bf539cc507afd909ce5'
X-Git-Tag: n3.3-dev~1228
X-Git-Url: http://git.ffmpeg.org/gitweb/ffmpeg.git/commitdiff_plain/85a52a77ce879e2d41056f31730462fcca11c9ae

Merge commit 'b2d5d6a7f20a255a5f3c9bf539cc507afd909ce5'

* commit 'b2d5d6a7f20a255a5f3c9bf539cc507afd909ce5':
  build: Only enable symbol reduction if the compiler does proper DCE

Merged-by: Clément Bœsch <u@pkh.me>
---

85a52a77ce879e2d41056f31730462fcca11c9ae
diff --cc configure
index 99cf017,e68cd3e..007c953
--- a/configure
+++ b/configure
@@@ -6045,10 -4831,17 +6045,17 @@@ enabled xmm_clobber_test &
                    -Wl,--wrap,sws_scale ||
      disable xmm_clobber_test
  
- echo "X { local: *; };" > $TMPV
- if test_ldflags -Wl,${version_script},$TMPV; then
-     append SHFLAGS '-Wl,${version_script},\$(SUBDIR)lib\$(NAME).ver'
-     check_cc <<EOF && enable symver_asm_label
 -check_ld <<EOF && enable proper_dce
++check_ld "cc" <<EOF && enable proper_dce
+ extern const int array[512];
+ static inline int func(void) { return array[0]; }
+ int main(void) { return 0; }
+ EOF
+ 
+ if enabled proper_dce; then
+     echo "X { local: *; };" > $TMPV
+     if test_ldflags -Wl,${version_script},$TMPV; then
+         append SHFLAGS '-Wl,${version_script},\$(SUBDIR)lib\$(NAME).ver'
+         check_cc <<EOF && enable symver_asm_label
  void ff_foo(void) __asm__ ("av_foo@VERSION");
  void ff_foo(void) { ${inline_asm+__asm__($quotes);} }
  EOF