X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=acinclude.m4;h=e074c7d47ebb0cb006ae9aa1cefe917a8cf11a9d;hb=49c36903d6d65bed96cba31f05534510a21a68d7;hp=e37a316dffa97a99d069ed2bd0687f591deca7d9;hpb=d161c099279e9ab564636c72423268e6da69f795;p=openvswitch

diff --git a/acinclude.m4 b/acinclude.m4
index e37a316d..e074c7d4 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -235,4 +235,14 @@ dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement])
 AC_DEFUN([OVS_ENABLE_OPTION], 
   [OVS_CHECK_CC_OPTION([$1], [WARNING_FLAGS="$WARNING_FLAGS $1"])
    AC_SUBST([WARNING_FLAGS])])
+
+dnl OVS_CONDITIONAL_CC_OPTION([OPTION], [CONDITIONAL])
+dnl Check whether the given C compiler OPTION is accepted.
+dnl If so, enable the given Automake CONDITIONAL.
+
+dnl Example: OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED])
+AC_DEFUN([OVS_CONDITIONAL_CC_OPTION],
+  [OVS_CHECK_CC_OPTION(
+    [$1], [ovs_have_cc_option=yes], [ovs_have_cc_option=no])
+   AM_CONDITIONAL([$2], [test $ovs_have_cc_option = yes])])
 dnl ----------------------------------------------------------------------