for better POSIX compliance

diff --git a/configure.ac b/configure.ac
index b05ba374b81b3847389a59fd7178d06dfba6b9cd..91105c3c3938bc26bb2949304c657b3d63542d6e 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -70,6 +70,7 @@ DEFAULT_INTERFACE="\"eth0\""
 case "$host_os" in
 *darwin* | *rhapsody* | *macosx*)
      AC_DEFINE_UNQUOTED(DARWIN,1,[This is an Apple Darwin system])
+     CPPFLAGS="-D_APPLE_C_SOURCE $CPPFLAGS"
      CFLAGS="-no-cpp-precomp -fno-common $CFLAGS"
      AC_MSG_WARN([The VPN application cannot be compiled on your OS])
      build_target="darwin"