Adding LTO

Author: APGRoboCop

AMBuildScript

@@ -56,7 +56,7 @@ if builder.cxx.target.platform == 'linux':
     '-std=c++17',
   ]
   # Linux linker flags
-  builder.cxx.linkflags += ['-m32', '-ldl', '-lm']
+  builder.cxx.linkflags += ['-m32', '-ldl', '-lm', '-flto']
 elif builder.cxx.target.platform == 'windows':
   # Windows defines
   builder.cxx.defines += [
@@ -101,11 +101,13 @@ if builder.options.optimize:
   if builder.cxx.target.platform == 'linux':
     # Linux optimization flags
     builder.cxx.cflags += ['-O3']
+	# Linux optimization link flags #TODO
+	#builder.cxx.linkflags += ['-flto']
   elif builder.cxx.target.platform == 'windows':
     # Windows optimization flags - /Ob3 needs to be after /Ox, enables aggressive function inling -caxanga334
-    builder.cxx.cflags += ['/Ox', '/Zo', '/Ob3', '/GF']
+    builder.cxx.cflags += ['/Ox', '/Zo', '/Ob3', '/GL']
     # Windows optimization link flags
-    builder.cxx.linkflags += ['/OPT:ICF', '/OPT:REF']
+    builder.cxx.linkflags += ['/OPT:ICF', '/OPT:REF', '/LTCG']
     # This needs to be after our optimization flags which could otherwise disable it.
     builder.cxx.cflags += ['/Oy-']
 
@@ -115,7 +117,7 @@ if builder.options.debug:
   builder.cxx.defines += ['DEBUG', '_DEBUG']
   if builder.cxx.target.platform == 'linux':
     # Linux debug flags
-    builder.cxx.cflags += ['-g3', '-Og', '-ggdb3']
+    builder.cxx.cflags += ['-g3', '-O0']
   elif builder.cxx.target.platform == 'windows':
     # Windows debug flags
     builder.cxx.cflags += ['/Od', '/RTC1', '/MTd']

common/const.h

@@ -14,6 +14,9 @@
 ****/
 #ifndef CONST_H
 #define CONST_H
+
+#include <cstdint>
+
 //
 // Constants shared by the engine and dlls
 // This header file included by engine files and DLL files.