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| author | Gwenole Beauchesne <gwenole.beauchesne@intel.com> | 2012-08-06 18:16:58 +0200 |
|---|---|---|
| committer | Gwenole Beauchesne <gwenole.beauchesne@intel.com> | 2012-09-26 11:53:58 +0200 |
| commit | f4a27f24ec5df32f28c3279e445200dded327585 (patch) | |
| tree | 1192701889a0c066dd12068ffe496bce1b1fdc7e /configure.ac | |
| parent | bbc66c8772ee6000f9a2421922259ff39b71a272 (diff) | |
| download | libva-f4a27f24ec5df32f28c3279e445200dded327585.tar.gz | |
configure: check for visibility attribute.
Add a check for GCC "visibility" attribute. Also define DLL_HIDDEN helper
so that to declare functions as internal to a particular shared library.
Signed-off-by: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 9f37d90..1f958a8 100644 --- a/configure.ac +++ b/configure.ac @@ -171,6 +171,28 @@ if test "$enable_docs" = "yes"; then fi AM_CONDITIONAL(ENABLE_DOCS, test "$enable_docs" = "yes") +# Check for __attribute__((visibility())) +AC_CACHE_CHECK([whether __attribute__((visibility())) is supported], + ac_cv_have_gnuc_visibility_attribute, + [cat > conftest.c <<EOF +int foo __attribute__ ((visibility ("hidden"))) = 1; +int bar __attribute__ ((visibility ("protected"))) = 1; +EOF + ac_cv_have_gnuc_visibility_attribute="no" + if ${CC-cc} -Werror -S conftest.c -o conftest.s >/dev/null 2>&1; then + if grep '\.hidden.*foo' conftest.s >/dev/null; then + if grep '\.protected.*bar' conftest.s >/dev/null; then + ac_cv_have_gnuc_visibility_attribute="yes" + fi + fi + fi + rm -f conftest.[cs] +]) +if test "$ac_cv_have_gnuc_visibility_attribute" = "yes"; then + AC_DEFINE([HAVE_GNUC_VISIBILITY_ATTRIBUTE], [1], + [Defined to 1 if GCC visibility attribute is supported]) +fi + # Check for X11 USE_X11="no" if test "$enable_x11" = "yes"; then |