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-rw-r--r--configure.ac2
1 files changed, 1 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac
index 6fbf585..533c635 100644
--- a/configure.ac
+++ b/configure.ac
@@ -23,7 +23,7 @@ AM_INIT_AUTOMAKE([parallel-tests color-tests std-options])
AM_SILENT_RULES([yes])
dnl Use C99 mode with GNU extensions
-CFLAGS="-std=gnu99 $CFLAGS"
+CFLAGS="-std=gnu99 -D_REENTRANT $CFLAGS"
dnl Programs
AC_PROG_CC