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| author | Martin Lucina <mato@kotelna.sk> | 2010-11-25 17:12:31 +0100 |
|---|---|---|
| committer | Martin Sustrik <sustrik@250bpm.com> | 2010-11-25 17:12:31 +0100 |
| commit | c9584096e033850c77c4c3d4ee99e8073f7b26da (patch) | |
| tree | 1c87497cffc99288743e21798b9ac452917f618d /configure.in | |
| parent | 734624be760b3c7942eb26bea77fca918cb1540d (diff) | |
Control symbol exports using -fvisibility
On systems using GCC 4.0 or newer which support symbol visibility in shared
libraries, use -fvisibility=hidden and only export explict API functions
defined in zmq.cpp. We do not enable -fvisibility on MinGW since this uses a
separate mechanism (__declspec).
Signed-off-by: Martin Lucina <mato@kotelna.sk>
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/configure.in b/configure.in index 27f8bab..b7d524a 100644 --- a/configure.in +++ b/configure.in @@ -223,6 +223,18 @@ case "${host_os}" in ;; esac +# Check if the compiler supports -fvisibility=hidden. If so, use it, but not +# on MinGW32 where we use a separate mechanism (__declspec). +_LT_COMPILER_OPTION([if $compiler supports -fvisibility=hidden], + ac_cv_prog_compiler_visibility, + [-fvisibility=hidden], + [], + [have_dso_visibility=yes]) +if test "x$have_dso_visibility" = "xyes" -a "x$on_mingw32" = "xno"; then + LIBZMQ_EXTRA_CFLAGS="-fvisibility=hidden $LIBZMQ_EXTRA_CFLAGS" + LIBZMQ_EXTRA_CXXFLAGS="-fvisibility=hidden $LIBZMQ_EXTRA_CXXFLAGS" +fi + # CPU-specific optimizations case "${host_cpu}" in *sparc*) |