--- a/third_party/protobuf/configure.ac +++ b/third_party/protobuf/configure.ac @@ -189,6 +189,16 @@ AM_CONDITIONAL([HAVE_PTHREAD], [test "x$ # We still keep this for improving pbconfig.h for unsupported platforms. AC_CXX_STL_HASH +AC_MSG_CHECKING([whether linking wiht -latomic succeeds]) +save_LIBS=$LIBS +LIBS="$LIBS -latomic" +AC_LINK_IFELSE( + [AC_LANG_SOURCE([int main() { return 0; }])], + [LIBATOMIC=-latomic; AC_MSG_RESULT(yes)], + [LIBATOMIC=; AC_MSG_RESULT(no)]) +AC_SUBST(LIBATOMIC) +LIBS=$save_LIBS + case "$target_os" in mingw* | cygwin* | win* | aix*) ;; --- a/third_party/protobuf/src/Makefile.am +++ b/third_party/protobuf/src/Makefile.am @@ -211,7 +211,7 @@ libprotobuf_lite_la_SOURCES = google/protobuf/io/zero_copy_stream.cc \ google/protobuf/io/zero_copy_stream_impl_lite.cc -libprotobuf_la_LIBADD = $(PTHREAD_LIBS) +libprotobuf_la_LIBADD = $(PTHREAD_LIBS) $(LIBATOMIC) libprotobuf_la_LDFLAGS = -version-info 15:1:0 -export-dynamic -no-undefined if HAVE_LD_VERSION_SCRIPT libprotobuf_la_LDFLAGS += -Wl,--version-script=$(srcdir)/libprotobuf.map