wscript: add possibility to select windows subsystem during link, add define to use WinXP SDK. This commit forces WinXP compability on latest Visual Studio

engine/wscript

@@ -94,7 +94,8 @@ def build(bld):
 			features = 'c cprogram',
 			includes = includes,
 			use      = libs,
-			install_path = bld.env.BINDIR
+			install_path = bld.env.BINDIR,
+			subsystem = bld.env.MSVC_SUBSYSTEM
 		)
 	else:
 		bld.shlib(
@@ -103,5 +104,6 @@ def build(bld):
 			features = 'c',
 			includes = includes,
 			use      = libs,
-			install_path = bld.env.LIBDIR
+			install_path = bld.env.LIBDIR,
+			subsystem = bld.env.MSVC_SUBSYSTEM
 		)

game_launch/wscript

@@ -63,5 +63,6 @@ def build(bld):
 		features = 'c cprogram',
 		includes = includes,
 		use      = libs,
-		install_path = bld.env.BINDIR
+		install_path = bld.env.BINDIR,
+		subsystem = bld.env.MSVC_SUBSYSTEM
 	)

mainui

@@ -1 +1 @@
-Subproject commit dac66977620487260c7351c2a2c845f081a5dc71
+Subproject commit 72233d02c1a0912e8667fab1ce4561b470ce4293

wscript

@@ -71,13 +71,11 @@ def configure(conf):
 	conf.env.DEST_64BIT = False # predict state
 	try:
 		conf.check_cc(
-			fragment='''
+			fragment='''int main( void )
-			int main( void ) 
 			{
 				int check[sizeof(void*) == 4 ? 1: -1];
 				return 0;
-			}
+			}''',
-			''',
 			msg          = 'Checking if compiler create 32 bit code')
 	except conf.errors.ConfigurationError:
 		# Program not compiled, we have 64 bit 
@@ -112,6 +110,12 @@ def configure(conf):
 			conf.env.append_unique('CFLAGS',   ['/Z7'])
 			conf.env.append_unique('CXXFLAGS', ['/Z7'])
 			conf.env.append_unique('LINKFLAGS', ['/DEBUG'])
+		conf.env.append_unique('DEFINES', '_USING_V110_SDK71_') # Force XP compability
+
+	# Force XP compability, all build targets should add
+	# subsystem=bld.env.MSVC_SUBSYSTEM
+	# TODO: wrapper around bld.stlib, bld.shlib and so on?
+	conf.env.MSVC_SUBSYSTEM = 'WINDOWS,5.01'
 
 	if(conf.env.DEST_OS != 'win32'):
 		conf.check( lib='dl' )