| From f020fe05a20dfcd16cd7df833dcf3cdeef770538 Mon Sep 17 00:00:00 2001 |
| From: Carlos Santos <casantos@datacom.ind.br> |
| Date: Thu, 11 Feb 2016 10:58:35 -0200 |
| Subject: [PATCH 2/2] configure.ac: check if libatomic is needed |
| |
| Compilation of protobuf for PowerPC and SPARC may fail due to missing |
| references to __atomic_fetch_add_4 and __atomic_compare_exchange_4. |
| |
| The __atomic_*() intrinsics for all sizes are provided by libatomic when |
| gcc is >= 4.8. This can be achieved by adding this to configure.ac: |
| |
| AC_SEARCH_LIBS([__atomic_fetch_add_4], [atomic]) |
| |
| Signed-off-by: Carlos Santos <casantos@datacom.ind.br> |
| --- |
| configure.ac | 2 ++ |
| 1 file changed, 2 insertions(+) |
| |
| diff --git a/configure.ac b/configure.ac |
| index c07067c..88d4a0d 100644 |
| --- a/configure.ac |
| +++ b/configure.ac |
| @@ -160,6 +160,8 @@ AM_CONDITIONAL([HAVE_PTHREAD], [test "x$acx_pthread_ok" = "xyes"]) |
| # We still keep this for improving pbconfig.h for unsupported platforms. |
| AC_CXX_STL_HASH |
| |
| +AC_SEARCH_LIBS([__atomic_load_4], [atomic]) |
| + |
| case "$target_os" in |
| mingw* | cygwin* | win*) |
| ;; |
| -- |
| 2.5.0 |
| |
