Define _POSIX_C_SOURCE globally

See discussion in https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/4555

swaybar/bar.c

@@ -1,4 +1,3 @@
-#define _POSIX_C_SOURCE 200809L
 #include <assert.h>
 #include <errno.h>
 #include <fcntl.h>

swaybar/config.c

@@ -1,4 +1,3 @@
-#define _POSIX_C_SOURCE 200809L
 #include <stdlib.h>
 #include <string.h>
 #include "swaybar/config.h"

swaybar/i3bar.c

@@ -1,4 +1,3 @@
-#define _POSIX_C_SOURCE 200809L
 #include <json.h>
 #include <linux/input-event-codes.h>
 #include <ctype.h>

swaybar/ipc.c

@@ -1,4 +1,3 @@
-#define _POSIX_C_SOURCE 200809
 #include <limits.h>
 #include <poll.h>
 #include <stdio.h>

swaybar/main.c

@@ -1,4 +1,3 @@
-#define _POSIX_C_SOURCE 200809L
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>

swaybar/render.c

@@ -1,4 +1,3 @@
-#define _POSIX_C_SOURCE 200809L
 #include <assert.h>
 #include <linux/input-event-codes.h>
 #include <limits.h>

swaybar/status_line.c

@@ -1,4 +1,3 @@
-#define _POSIX_C_SOURCE 200809L
 #include <assert.h>
 #include <fcntl.h>
 #include <sys/ioctl.h>

swaybar/tray/host.c

@@ -1,4 +1,3 @@
-#define _POSIX_C_SOURCE 200809L
 #include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>

swaybar/tray/icon.c

@@ -1,4 +1,3 @@
-#define _POSIX_C_SOURCE 200809L
 #include <ctype.h>
 #include <dirent.h>
 #include <stdbool.h>

swaybar/tray/item.c

@@ -1,4 +1,3 @@
-#define _POSIX_C_SOURCE 200809L
 #include <arpa/inet.h>
 #include <cairo.h>
 #include <limits.h>

swaybar/tray/watcher.c

@@ -1,4 +1,3 @@
-#define _POSIX_C_SOURCE 200809L
 #include <stdbool.h>
 #include <stddef.h>
 #include <stdio.h>