configure.ac: AC_PROG_CC_C99: use C99 compiler

Given the close ties with input drivers and xserver, might
as well use the same level of compiler.

Signed-off-by: Gaetan Nadon <memsize@videotron.ca>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

diff --git a/configure.ac b/configure.ac
index 4de3aeae6843fee39d8a3573ae276fa8f56033fb..75d53d753635df51cf98b96a8fb3443963575163 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -48,7 +48,7 @@ AC_SUBST(LIBEVDEV_LT_VERSION)
 AM_SILENT_RULES([yes])
 
 # Check for programs
-AC_PROG_CC
+AC_PROG_CC_C99
 
 # Initialize libtool
 LT_PREREQ([2.2])