Add support for Unicode entries 'wmain' and 'wWinMain' on Windows

'-run' suported. argvs are converted.
But don't use compliled Unicode CLI exe-file to get inputs interactively in other codepage!
Please add other compliling supports than 'build-tcc.bat' (Who is good at them).

win32/lib/crt1.c

@@ -1,6 +1,9 @@
 // =============================================
 // crt1.c
 
+// _UNICODE for tchar.h, UNICODE for API
+#include <tchar.h>
+
 #include <stdio.h>
 #include <stdlib.h>
 
@@ -18,20 +21,32 @@ typedef struct
     int newmode;
 } _startupinfo;
 
-int __cdecl __getmainargs(int *pargc, char ***pargv, char ***penv, int globb, _startupinfo*);
+#ifdef _UNICODE
+#define __tgetmainargs __wgetmainargs
+#define _tstart _wstart
+#define _tmain wmain
+#define _runtmain _runwmain
+#else
+#define __tgetmainargs __getmainargs
+#define _tstart _start
+#define _tmain main
+#define _runtmain _runmain
+#endif
+
+int __cdecl __tgetmainargs(int *pargc, _TCHAR ***pargv, _TCHAR ***penv, int globb, _startupinfo*);
 void __cdecl __set_app_type(int apptype);
 unsigned int __cdecl _controlfp(unsigned int new_value, unsigned int mask);
-int main(int argc, char * argv[], char * env[]);
+extern int _tmain(int argc, _TCHAR * argv[], _TCHAR * env[]);
 
 /* Allow command-line globbing with "int _dowildcard = 1;" in the user source */
 int _dowildcard;
 
-void _start(void)
+void _tstart(void)
 {
     __TRY__
     int argc, ret;
-    char **argv;
-    char **env;
+    _TCHAR **argv;
+    _TCHAR **env;
     _startupinfo start_info;
 
     // Sets the current application type
@@ -45,8 +60,28 @@ void _start(void)
 #endif
 
     start_info.newmode = 0;
-    __getmainargs( &argc, &argv, &env, _dowildcard, &start_info);
-    ret = main(argc, argv, env);
+    __tgetmainargs( &argc, &argv, &env, _dowildcard, &start_info);
+    ret = _tmain(argc, argv, env);
+    exit(ret);
+}
+
+void _runtmain(int argc0, /* as tcc passed in */ char **argv0)
+{
+    __TRY__
+    int argc, ret;
+    _TCHAR **argv;
+    _TCHAR **env;
+    _startupinfo start_info;
+
+    __set_app_type(_CONSOLE_APP);
+
+#ifdef __i386
+    _controlfp(_PC_53, _MCW_PC);
+#endif
+
+    start_info.newmode = 0;
+    __tgetmainargs( &argc, &argv, &env, _dowildcard, &start_info);
+    ret = _tmain(argc0, argv + argc - argc0, env);
     exit(ret);
 }