Define feature test macros in common.h

This enables necessary functions once for all.

As a consequence, define common.h before any other header.

app/src/util/buffer_util.h

@@ -1,11 +1,11 @@
 #ifndef BUFFER_UTIL_H
 #define BUFFER_UTIL_H
 
+#include "common.h"
+
 #include <stdbool.h>
 #include <stdint.h>
 
-#include "common.h"
-
 static inline void
 buffer_write16be(uint8_t *buf, uint16_t value) {
     buf[0] = value >> 8;

app/src/util/cbuf.h

@@ -2,11 +2,11 @@
 #ifndef CBUF_H
 #define CBUF_H
 
+#include "common.h"
+
 #include <stdbool.h>
 #include <unistd.h>
 
-#include "common.h"
-
 // To define a circular buffer type of 20 ints:
 //     struct cbuf_int CBUF(int, 20);
 //

app/src/util/lock.h

@@ -1,10 +1,11 @@
 #ifndef LOCK_H
 #define LOCK_H
 
+#include "common.h"
+
 #include <stdint.h>
 #include <SDL2/SDL_mutex.h>
 
-#include "common.h"
 #include "log.h"
 
 static inline void

app/src/util/net.h

@@ -1,6 +1,8 @@
 #ifndef NET_H
 #define NET_H
 
+#include "common.h"
+
 #include <stdbool.h>
 #include <stdint.h>
 #include <SDL2/SDL_platform.h>
@@ -17,8 +19,6 @@
   typedef int socket_t;
 #endif
 
-#include "common.h"
-
 bool
 net_init(void);
 

app/src/util/process.h

@@ -1,10 +1,10 @@
 #ifndef SC_PROCESS_H
 #define SC_PROCESS_H
 
-#include <stdbool.h>
-
 #include "common.h"
 
+#include <stdbool.h>
+
 #ifdef _WIN32
 
  // not needed here, but winsock2.h must never be included AFTER windows.h

app/src/util/queue.h

@@ -2,12 +2,12 @@
 #ifndef QUEUE_H
 #define QUEUE_H
 
+#include "common.h"
+
 #include <assert.h>
 #include <stdbool.h>
 #include <stddef.h>
 
-#include "common.h"
-
 // To define a queue type of "struct foo":
 //    struct queue_foo QUEUE(struct foo);
 #define QUEUE(TYPE) { \

app/src/util/str_util.h

@@ -1,11 +1,11 @@
 #ifndef STRUTIL_H
 #define STRUTIL_H
 
+#include "common.h"
+
 #include <stdbool.h>
 #include <stddef.h>
 
-#include "common.h"
-
 // like strncpy, except:
 //  - it copies at most n-1 chars
 //  - the dest string is nul-terminated