package/protobuf/0001-configure.ac-check-if-libatomic-is-needed.patch

   1 From f020fe05a20dfcd16cd7df833dcf3cdeef770538 Mon Sep 17 00:00:00 2001
   2 From: Carlos Santos <casantos@datacom.ind.br>
   3 Date: Thu, 11 Feb 2016 10:58:35 -0200
   4 Subject: [PATCH 2/2] configure.ac: check if libatomic is needed
   5
   6 Compilation of protobuf for PowerPC and SPARC may fail due to missing
   7 references to __atomic_fetch_add_4 and __atomic_compare_exchange_4.
   8
   9 The __atomic_*() intrinsics for all sizes are provided by libatomic when
  10 gcc is >= 4.8. This can be achieved by adding this to configure.ac:
  11
  12     AC_SEARCH_LIBS([__atomic_fetch_add_4], [atomic])
  13
  14 Signed-off-by: Carlos Santos <casantos@datacom.ind.br>
  15 ---
  16  configure.ac | 2 ++
  17  1 file changed, 2 insertions(+)
  18
  19 diff --git a/configure.ac b/configure.ac
  20 index c07067c..88d4a0d 100644
  21 --- a/configure.ac
  22 +++ b/configure.ac
  23 @@ -160,6 +160,8 @@ AM_CONDITIONAL([HAVE_PTHREAD], [test "x$acx_pthread_ok" = "xyes"])
  24  # We still keep this for improving pbconfig.h for unsupported platforms.
  25  AC_CXX_STL_HASH
  26
  27 +AC_SEARCH_LIBS([__atomic_load_4], [atomic])
  28 +
  29  case "$target_os" in
  30    mingw* | cygwin* | win*)
  31      ;;
  32 --
  33 2.5.0
  34