From 52d1e3f298a6f666d080441151f4718552c0fc15 Mon Sep 17 00:00:00 2001
From: degomme <augustin.degomme@unibas.ch>
Date: Thu, 5 Apr 2018 10:54:36 +0200
Subject: [PATCH] force gnu_source here. It's needed for unistd.h types, which
 would be not defined if the user only specifies POSIX_SOURCE

---
 include/smpi/smpi_helpers.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/smpi/smpi_helpers.h b/include/smpi/smpi_helpers.h
index b76af574da..13ccaafd69 100644
--- a/include/smpi/smpi_helpers.h
+++ b/include/smpi/smpi_helpers.h
@@ -1,6 +1,10 @@
 #ifndef MPI_HELPERS_H
 #define MPI_HELPERS_H
 
+#ifndef _GNU_SOURCE
+  #define _GNU_SOURCE
+#endif
+
 #include <unistd.h>
 #include <sys/time.h> /* Load it before the define next line to not mess with the system headers */
 #if _POSIX_TIMERS
-- 
2.20.1