mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Nathan Scott
23 lines
726 B
Plaintext
23 lines
726 B
Plaintext
AC_DEFUN([AC_FUNC_GCC_VISIBILITY],
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[AC_CACHE_CHECK(whether __attribute__((visibility())) is supported,
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libc_cv_visibility_attribute,
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[cat > conftest.c <<EOF
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int foo __attribute__ ((visibility ("hidden"))) = 1;
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int bar __attribute__ ((visibility ("protected"))) = 1;
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EOF
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libc_cv_visibility_attribute=no
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if ${CC-cc} -Werror -S conftest.c -o conftest.s \
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>/dev/null 2>&1; then
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if grep '\.hidden.*foo' conftest.s >/dev/null; then
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if grep '\.protected.*bar' conftest.s >/dev/null; then
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libc_cv_visibility_attribute=yes
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fi
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fi
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fi
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rm -f conftest.[cs]
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])
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if test $libc_cv_visibility_attribute = yes; then
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AC_DEFINE(HAVE_VISIBILITY_ATTRIBUTE)
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fi
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])
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