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-rw-r--r--configure.in1
1 files changed, 1 insertions, 0 deletions
diff --git a/configure.in b/configure.in
index 0bb1e9eb..07203e13 100644
--- a/configure.in
+++ b/configure.in
@@ -781,6 +781,7 @@ AM_CONDITIONAL(BITQ, test $build_bitq = yes)
AC_LANG_C
AC_PROG_CC
+AC_PROG_CC_C99
AM_PROG_CC_C_O
AC_PROG_RANLIB