*: stop defining _GNU_SOURCE in source files, it's in CFLAGS anyway

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

e2fsprogs/old_e2fsprogs/e2fsck.c

@@ -29,10 +29,6 @@
  * Licensed under GPLv2 or later, see file License in this tarball for details.
  */
 
-#ifndef _GNU_SOURCE
-#define _GNU_SOURCE 1 /* get strnlen() */
-#endif
-
 #include "e2fsck.h"	/*Put all of our defines here to clean things up*/
 
 #define _(x) x

libbb/get_line_from_file.c

@@ -9,11 +9,6 @@
  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  */
 
-/* for getline() [GNUism]
-#ifndef _GNU_SOURCE
-#define _GNU_SOURCE 1
-#endif
-*/
 #include "libbb.h"
 
 /* This function reads an entire line from a text file, up to a newline

modutils/depmod.c

@@ -8,8 +8,6 @@
  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  */
 
-#undef _GNU_SOURCE
-#define _GNU_SOURCE
 #include "libbb.h"
 #include "modutils.h"
 #include <sys/utsname.h> /* uname() */

shell/ash.c

@@ -36,12 +36,6 @@
 
 #define JOBS ENABLE_ASH_JOB_CONTROL
 
-#if DEBUG
-# ifndef _GNU_SOURCE
-#  define _GNU_SOURCE
-# endif
-#endif
-
 #include "busybox.h" /* for applet_names */
 #include <paths.h>
 #include <setjmp.h>

util-linux/hwclock.c

@@ -12,13 +12,6 @@
 #include <sys/utsname.h>
 #include "rtc_.h"
 
-#if ENABLE_FEATURE_HWCLOCK_LONG_OPTIONS
-# ifndef _GNU_SOURCE
-#  define _GNU_SOURCE
-# endif
-#endif
-
-
 /* diff code is disabled: it's not sys/hw clock diff, it's some useless
  * "time between hwclock was started and we saw CMOS tick" quantity.
  * It's useless since hwclock is started at a random moment,