mpc.m4: disable warning flag -Wunused-value, contained in -Wall with clang;

   we ignore return values all the time


git-svn-id: svn://scm.gforge.inria.fr/svn/mpc/trunk@982 211d60ee-9f03-0410-a15a-8952a2c7a4e4

1 files changed, 1 insertions, 0 deletions

diff --git a/m4/mpc.m4 b/m4/mpc.m4
index 948f553..cc2ec45 100644
--- a/m4/mpc.m4
+++ b/m4/mpc.m4
@@ -50,6 +50,7 @@ AC_DEFUN([MPC_PROG_CC_WARNINGCFLAGS], [
       AX_C_CHECK_FLAG(-Wshadow,,,$1="$$1 -Wshadow",)
       AX_C_CHECK_FLAG(-Wstrict-prototypes,,,$1="$$1 -Wstrict-prototypes",)
       AX_C_CHECK_FLAG(-Wmissing-prototypes,,,$1="$$1 -Wmissing-prototypes",)
+      AX_C_CHECK_FLAG(-Wno-unused-value,,,$1="$$1 -Wno-unused-value",)
       AC_SUBST($1)
     fi
   fi