RepoMirrors/ffmpeg
1
0
Fork 0
mirror of https://git.ffmpeg.org/ffmpeg.git synced 2024-12-27 09:52:17 +00:00
Code Issues Projects Releases Wiki Activity

build: Only enable symbol reduction if the compiler does proper DCE

Browse Source 
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
This commit is contained in:
Diego Biurrun 2016-05-27 20:14:21 +02:00
parent c5fd4b5061
commit b2d5d6a7f2
1 changed files with 13 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
configure vendored
View File

@ -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