UnGNUify the codebase

common/CMakeLists.txt

@@ -13,10 +13,3 @@ add_library(sway-common STATIC
 	)
 
 target_link_libraries(sway-common m)
-
-if(Backtrace_FOUND)
-	set_target_properties(sway-common
-		PROPERTIES
-		COMPILE_FLAGS "-include ${Backtrace_HEADER}"
-		)
-endif()

common/ipc-client.c

@@ -1,5 +1,6 @@
-#include <stdint.h>
+#define _POSIX_C_SOURCE 2
 #include <stdio.h>
+#include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/socket.h>

common/log.c

@@ -1,3 +1,4 @@
+#define _POSIX_C_SOURCE 1
 #include <errno.h>
 #include <libgen.h>
 #include <signal.h>

common/stringop.c

@@ -1,3 +1,4 @@
+#define _XOPEN_SOURCE 500
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>

common/util.c

@@ -3,6 +3,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <strings.h>
 #include <wlc/wlc.h>
 #include <xkbcommon/xkbcommon-names.h>
 #include "log.h"