From c5f46105a8ca33fcd313268a6edb286b028a922b Mon Sep 17 00:00:00 2001
From: Daniel Elstner <daniel.kitta@gmail.com>
Date: Sun, 13 Sep 2015 22:45:24 +0200
Subject: [PATCH 1/1] Build: Move _POSIX_C_SOURCE definition to config.h

Do not redefine it though when already set, so that it can be
overridden by the user, or indirectly by the compiler settings.
---
 Makefile.am  |  1 -
 configure.ac | 10 ++++++----
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/Makefile.am b/Makefile.am
index d685d77..953080d 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -20,7 +20,6 @@
 ACLOCAL_AMFLAGS = -I m4
 GNUMAKEFLAGS = --no-print-directory
 
-AM_CPPFLAGS = -D_POSIX_C_SOURCE=200112L
 AM_CFLAGS = $(SC_EXTRA_CFLAGS) $(SC_WFLAGS) $(SIGROK_CLI_CFLAGS)
 
 bin_PROGRAMS = sigrok-cli
diff --git a/configure.ac b/configure.ac
index 1f925fa..7e13190 100644
--- a/configure.ac
+++ b/configure.ac
@@ -31,16 +31,18 @@ AC_CONFIG_HEADERS([config.h])
 AM_INIT_AUTOMAKE([1.11 -Wall -Werror no-define std-options check-news])
 AM_SILENT_RULES([yes])
 
-AH_TOP([#ifndef SIGROK_CLI_CONFIG_H
-#define SIGROK_CLI_CONFIG_H    /* To stop multiple inclusions. */])
-AH_BOTTOM([#endif /* SIGROK_CLI_CONFIG_H */])
-
 AC_CANONICAL_HOST
 
 # Checks for programs.
 AC_PROG_CC
 AC_PROG_INSTALL
 
+# Set the standard the C library headers should conform to.
+AH_VERBATIM([_POSIX_C_SOURCE], [/* The targeted POSIX standard. */
+#ifndef _POSIX_C_SOURCE
+# define _POSIX_C_SOURCE 200112L
+#endif])
+
 # Get compiler versions.
 SR_PROG_VERSION([$CC], [sc_cc_version])
 
-- 
2.30.2