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-rw-r--r--configure.ac2
1 files changed, 2 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac
index 0fdc27d3..2e8d4cce 100644
--- a/configure.ac
+++ b/configure.ac
@@ -72,6 +72,8 @@ for i in /usr/pkg /sw /opt /opt/local; do
done
+CFLAGS="$CFLAGS -D_XOPEN_SOURCE=600 -D_POSIX_C_SOURCE=200112L"
+
AC_SUBST( optbindirs, $optbindirs )
# Tell autoconf to create config.h header