Added VPROF option & fixed vprof

tier0/threadtools.cpp

@@ -490,7 +490,7 @@ ThreadId_t ThreadGetCurrentId()
 	sys_ppu_thread_get_id( &th );
 	return th;
 #elif defined(POSIX)
-	return (ThreadId_t)pthread_self();
+	return (ThreadId_t)gettid();
 #else
 	Assert(0);
 	DebuggerBreak();

wscript

@@ -281,11 +281,12 @@ def define_platform(conf):
 		])
 
 	conf.define('GIT_COMMIT_HASH', conf.env.GIT_VERSION)
-	conf.define('VPROF_LEVEL', 1)
 
 def options(opt):
 	grp = opt.add_option_group('Common options')
 
+	grp.add_option('-P', '--profiling', dest='PROFILING', type = int, default = 0, action='store', help='Add profiling support (0 to 4)')
+
 	grp.add_option('-4', '--32bits', action = 'store_true', dest = 'TARGET32', default = False,
 		help = 'allow targetting 32-bit engine(Linux/Windows/OSX x86 only) [default: %(default)r]')
 
@@ -488,6 +489,10 @@ def configure(conf):
 			'-faligned-new',
 		]
 
+	if conf.options.PROFILING > 0:
+		conf.define('VPROF_LEVEL', conf.options.PROFILING)
+		conf.define('VPROF_ENABLED', 1)
+
 	c_compiler_optional_flags = [
 		'-fnonconst-initializers' # owcc
 	]