Configure feature test macros in meson

Refs #2807 <https://github.com/Genymobile/scrcpy/pull/2807>

Co-authored-by: RipleyTom <RipleyTom@users.noreply.github.com>

app/meson.build

@@ -39,25 +39,23 @@ src = [
     'src/util/tick.c',
 ]
 
-conf = configuration_data()
-
 if host_machine.system() == 'windows'
     src += [
         'src/sys/win/file.c',
         'src/sys/win/process.c',
     ]
-    conf.set('_WIN32_WINNT', '0x0600')
-    conf.set('WINVER', '0x0600')
+    add_project_arguments('-D_WIN32_WINNT=0x0600', language: 'c')
+    add_project_arguments('-DWINVER=0x0600', language: 'c')
 else
     src += [
         'src/sys/unix/file.c',
         'src/sys/unix/process.c',
     ]
-    conf.set('_POSIX_C_SOURCE', '200809L')
-    conf.set('_XOPEN_SOURCE', '700')
-    conf.set('_GNU_SOURCE', true)
+    add_project_arguments('-D_POSIX_C_SOURCE=200809L', language: 'c')
+    add_project_arguments('-D_XOPEN_SOURCE=700', language: 'c')
+    add_project_arguments('-D_GNU_SOURCE', language: 'c')
     if host_machine.system() == 'darwin'
-        conf.set('_DARWIN_C_SOURCE', true)
+        add_project_arguments('-D_DARWIN_C_SOURCE', language: 'c')
     endif
 endif
 
@@ -138,6 +136,8 @@ if host_machine.system() == 'windows'
     dependencies += cc.find_library('ws2_32')
 endif
 
+conf = configuration_data()
+
 foreach f : check_functions
   if cc.has_function(f)
     define = 'HAVE_' + f.underscorify().to_upper()

app/src/compat.h

@@ -1,8 +1,6 @@
 #ifndef COMPAT_H
 #define COMPAT_H
 
-#include "config.h"
-
 #include <libavformat/version.h>
 #include <SDL2/SDL_version.h>