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configure: fix symver detection with icc 10

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Apparently the compiler sometimes bypasses the normal assembler, in
which case the asm label variant works.  If the file contains any
inline asm, this bypassing is not done, and the assembler chokes on
invalid syntax.  Inserting a dummy asm() statement in the test when
the compiler supports it makes sure no shortcuts are taken and the
test fails as it should.

Originally committed as revision 23616 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2010-06-15 18:06:28 +00:00
parent ccc87908a9
commit 0884fadf68
1 changed files with 3 additions and 1 deletions
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4
configure vendored
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@ -252,6 +252,8 @@ EOF
exit 0
}
quotes='""'
log(){
echo "$@" >> $logfile
}
@ -2723,7 +2725,7 @@ if test_ldflags -Wl,--version-script,$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) {}
void ff_foo(void) { ${inline_asm+__asm__($quotes);} }
EOF
check_cc <<EOF && enable symver_gnu_asm
__asm__(".symver ff_foo,av_foo@VERSION");