Require C99

We'll want to use a few C99-specific features, and C99 is getting older
than whisky now anyway.

diff --git a/configure.ac b/configure.ac
index 72f0148e0a91d528e04849acd10c432e720e7f9a..dd2cc2807d594e57bdb688955addb6e5eaddb595 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -82,7 +82,7 @@ AC_ARG_ENABLE(
   ]
 )
 
-AC_PROG_CC
+AC_PROG_CC_C99
 AC_PROG_CPP
 AC_PROG_INSTALL
 AC_CANONICAL_HOST