configure: try to set the C compiler mode to accept ISO Standard C

[strace] / configure.ac

diff --git a/configure.ac b/configure.ac
index 1ec39c3f250e071d1cfc6ddf7b5fcb652a38e0e2..5c0b1e93b779423d79089b5286d005601f894000 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -52,6 +52,7 @@ DEB_CHANGELOGTIME="$(LC_TIME=C date -R)"
 AC_SUBST(DEB_CHANGELOGTIME)
 
 AC_PROG_CC
+AC_PROG_CC_STDC
 AC_PROG_CPP
 st_WARN_CFLAGS
 AX_PROG_CC_FOR_BUILD