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-rw-r--r--erts/configure.in3
1 files changed, 3 insertions, 0 deletions
diff --git a/erts/configure.in b/erts/configure.in
index 2797351e45..370646930f 100644
--- a/erts/configure.in
+++ b/erts/configure.in
@@ -351,6 +351,9 @@ case $host_os in
AC_MSG_WARN([Reverting to 32-bit time_t])
CPPFLAGS="$CPPFLAGS -D_USE_32BIT_TIME_T"
;;
+ darwin*)
+ CPPFLAGS="$CPPFLAGS -D_XOPEN_SOURCE"
+ ;;
*)
;;
esac