X-Git-Url: http://git.meshlink.io/?a=blobdiff_plain;f=configure.ac;h=022bba7bb817b296b7a61358da89d24c06c94c59;hb=refs%2Fheads%2Ffeature%2Fbetter-pmtu-probes;hp=3cf76b051995499e92d90ac4f28bbe2968c69dd1;hpb=654644f1b818e2273042c9bcbd61bb25a8fedcbb;p=meshlink

diff --git a/configure.ac b/configure.ac
index 3cf76b05..022bba7b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -15,11 +15,13 @@ AM_SILENT_RULES([yes])
 AC_USE_SYSTEM_EXTENSIONS
 AC_DEFINE([__USE_BSD], 1, [Enable BSD extensions])
 AC_DEFINE([_POSIX_C_SOURCE], 200809L, [Enable POSIX features])
+AC_DEFINE([_DARWIN_C_SOURCE], 1, [Enable Darwin features])
 
 dnl Checks for programs.
 AM_PROG_CC_C_O
 AM_PROG_AR
 AC_PROG_CC
+AC_PROG_CC_C99
 AC_PROG_CXX
 AC_PROG_CPP
 AC_PROG_INSTALL