add _GNU_SOURCE as compiler flag

src/examples/meson.build

@@ -1,27 +1,32 @@
 executable('video-src',
   'video-src.c',
+  c_args : [ '-D_GNU_SOURCE' ],
   install: false,
   dependencies : [pipewire_dep, mathlib],
 )
 executable('audio-src',
   'audio-src.c',
+  c_args : [ '-D_GNU_SOURCE' ],
   install: false,
   dependencies : [pipewire_dep, mathlib],
 )
 executable('export-source',
   'export-source.c',
+  c_args : [ '-D_GNU_SOURCE' ],
   install: false,
   dependencies : [pipewire_dep, mathlib],
 )
 
 executable('export-spa',
   'export-spa.c',
+  c_args : [ '-D_GNU_SOURCE' ],
   install: false,
   dependencies : [pipewire_dep, mathlib],
 )
 
 executable('media-session',
   'media-session.c',
+  c_args : [ '-D_GNU_SOURCE' ],
   install: false,
   dependencies : [pipewire_dep, mathlib],
 )
@@ -29,16 +34,19 @@ executable('media-session',
 if sdl_dep.found()
   executable('video-play',
     'video-play.c',
+    c_args : [ '-D_GNU_SOURCE' ],
     install: false,
     dependencies : [pipewire_dep, sdl_dep],
   )
   executable('local-v4l2',
     'local-v4l2.c',
+    c_args : [ '-D_GNU_SOURCE' ],
     install: false,
     dependencies : [pipewire_dep, sdl_dep],
   )
   executable('export-sink',
     'export-sink.c',
+    c_args : [ '-D_GNU_SOURCE' ],
     install: false,
     dependencies : [pipewire_dep, sdl_dep, mathlib],
   )

src/gst/gstpipewireformat.c

@@ -22,7 +22,6 @@
  * DEALINGS IN THE SOFTWARE.
  */
 
-#define _GNU_SOURCE
 #include <stdio.h>
 
 #include <gst/gst.h>

src/gst/meson.build

@@ -19,6 +19,7 @@ pipewire_gst_headers = [
 
 pipewire_gst_c_args = [
   '-DHAVE_CONFIG_H',
+  '-D_GNU_SOURCE',
 ]
 
 pipewire_gst = shared_library('gstpipewire',

src/modules/module-rtkit.c

@@ -89,10 +89,6 @@ struct impl {
 
 #include <dbus/dbus.h>
 
-#ifndef _GNU_SOURCE
-#define _GNU_SOURCE
-#endif
-
 #ifdef HAVE_CONFIG_H
 #include <config.h>
 #endif

src/pipewire/client.h

@@ -29,9 +29,11 @@
 extern "C" {
 #endif
 
+#ifdef _GNU_SOURCE
 #ifndef __USE_GNU
 #define __USE_GNU
 #endif
+#endif
 
 #include <sys/socket.h>
 

src/pipewire/mem.c

@@ -22,10 +22,6 @@
  * DEALINGS IN THE SOFTWARE.
  */
 
-#ifndef _GNU_SOURCE
-#define _GNU_SOURCE
-#endif
-
 #include "config.h"
 
 #include <string.h>

src/tools/meson.build

@@ -1,10 +1,12 @@
 executable('pipewire-monitor',
-  'pipewire-monitor.c',
-  install: true,
-  dependencies : [pipewire_dep],
+	'pipewire-monitor.c',
+	c_args : [ '-D_GNU_SOURCE' ],
+	install: true,
+	dependencies : [pipewire_dep],
 )
 executable('pipewire-cli',
-  'pipewire-cli.c',
-  install: true,
-  dependencies : [pipewire_dep],
+	'pipewire-cli.c',
+	c_args : [ '-D_GNU_SOURCE' ],
+	install: true,
+	dependencies : [pipewire_dep],
 )

src/tools/pipewire-cli.c

@@ -22,8 +22,6 @@
  * DEALINGS IN THE SOFTWARE.
  */
 
-#define _GNU_SOURCE         /* See feature_test_macros(7) */
-
 #include <unistd.h>
 #include <errno.h>
 #include <stdio.h>