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-rw-r--r--sntp/m4/ntp_compiler.m41
1 files changed, 1 insertions, 0 deletions
diff --git a/sntp/m4/ntp_compiler.m4 b/sntp/m4/ntp_compiler.m4
index 2b41866..e4c515f 100644
--- a/sntp/m4/ntp_compiler.m4
+++ b/sntp/m4/ntp_compiler.m4
@@ -2,6 +2,7 @@ dnl ######################################################################
dnl Common m4sh code for compiler stuff
AC_DEFUN([NTP_COMPILER], [
AC_REQUIRE([AC_PROG_CC_C89])
+AC_REQUIRE([AC_PROG_CC_C99])
CFLAGS_NTP=
CPPFLAGS_NTP=