From c1e9f2f3d086e0df3c10a2468fd7b37fd0c5038c Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Wed, 7 Sep 2022 00:02:08 -0700
Subject: [PATCH] configure: Fix checks for system headers

Define _DEFAULT_SOURCE in system.c so unistd.h can expose readlink API

Upstream-Status: Pending

Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
 configure.ac | 2 +-
 src/system.c | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index cdf1eba..6fc81e6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -152,7 +152,7 @@ fi
 
 dnl Checks for header files.
 
-AC_CHECK_HEADERS( [unistd.h, stdint.h, inttypes.h])
+AC_CHECK_HEADERS( [unistd.h stdint.h inttypes.h])
 
 dnl Checks for typedefs, and compiler characteristics.
 
diff --git a/src/system.c b/src/system.c
index 4e008fa..98631a6 100644
--- a/src/system.c
+++ b/src/system.c
@@ -36,6 +36,8 @@
  *      1. specify the constants in "configed.H" or "noconfig.H",
  *      2. append the system-dependent routines in this file.
  */
+
+#define _DEFAULT_SOURCE
 #if PREPROCESSED
 #include    "mcpp.H"
 #else
-- 
2.37.3