diff --git a/tcctools.c b/tcctools.c
index 1d4424e..76a8a96 100644
--- a/tcctools.c
+++ b/tcctools.c
@@ -481,24 +481,7 @@ static int execvp_win32(const char *prog, char **argv)
 
 ST_FUNC void tcc_tool_cross(TCCState *s, char **argv, int target)
 {
-    char program[4096];
-    char *a0 = argv[0];
-    int prefix = tcc_basename(a0) - a0;
-
-    snprintf(program, sizeof program,
-        "%.*s%s"
-#ifdef TCC_TARGET_PE
-        "-win32"
-#endif
-        "-tcc"
-#ifdef _WIN32
-        ".exe"
-#endif
-        , prefix, a0, target == 64 ? "x86_64" : "i386");
-
-    if (strcmp(a0, program))
-        execvp(argv[0] = program, argv);
-    tcc_error("could not run '%s'", program);
+    tcc_error("-m%d not implemented.", target);
 }
 
 #endif /* TCC_TARGET_I386 && TCC_TARGET_X86_64 */