From 0500a1bd086d2d6fe974e7ded7ea615594f1f7b0 Mon Sep 17 00:00:00 2001
From: Aaron Dierking <aarond@fb.com>
Date: Thu, 14 Jun 2018 11:38:32 -0700
Subject: [PATCH] Don't require <grp.h>

This is only used in the overlay test and Windows does not provide it.

Signed-off-by: Guillem Jover <guillem@hadrons.org>
---
 configure.ac   | 2 +-
 test/overlay.c | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 55fcfe6..7769182 100644
--- a/configure.ac
+++ b/configure.ac
@@ -59,7 +59,7 @@ AS_CASE([$host_os],
 )
 
 # Checks for header files.
-AC_CHECK_HEADERS([sys/ndir.h sys/dir.h ndir.h dirent.h])
+AC_CHECK_HEADERS([sys/ndir.h sys/dir.h ndir.h dirent.h grp.h])
 
 # Checks for typedefs, structures, and compiler characteristics.
 AC_C_INLINE
diff --git a/test/overlay.c b/test/overlay.c
index 7812fcc..a17904f 100644
--- a/test/overlay.c
+++ b/test/overlay.c
@@ -28,7 +28,9 @@
  * other headers through magic macros, to check that the overlay is working
  * properly. */
 #include <errno.h>
+#ifdef HAVE_GRP_H
 #include <grp.h>
+#endif
 #include <stdint.h>
 
 /* Include libbsd overlayed headers that might get partially included. */