diff options
| author | Diego Biurrun <diego@biurrun.de> | 2016-05-27 20:14:21 +0200 |
|---|---|---|
| committer | Diego Biurrun <diego@biurrun.de> | 2016-05-30 14:59:43 +0200 |
| commit | b2d5d6a7f20a255a5f3c9bf539cc507afd909ce5 (patch) | |
| tree | b02478d50d7c2937fae6aa4d3a3eefa6f0539e60 | |
| parent | c5fd4b50610f62cbb3baa4f4108139363128dea1 (diff) | |
build: Only enable symbol reduction if the compiler does proper DCE
With compilers that do not support proper dead code elimination, like
Sun C 5.12, linking fails due to missing references to unavailable,
but also unused, symbols.
Bug-Id: 895
| -rwxr-xr-x | configure | 18 |
1 files changed, 13 insertions, 5 deletions
@@ -4831,17 +4831,25 @@ 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 +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 - check_cc <<EOF && enable symver_gnu_asm + check_cc <<EOF && enable symver_gnu_asm __asm__(".symver ff_foo,av_foo@VERSION"); void ff_foo(void) {} EOF + fi fi if [ -z "$optflags" ]; then |