code review 4527098: gc: enable building under clang/2.9

src/cmd/gc/subr.c

 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 #include        "go.h"
 #include        "md5.h"
 #include        "y.tab.h"
 #include        "opnames.h"
 #include        "yerr.h"
 
@@ skipping 87 matching lines @@
         nerr = 0;
 }
 
 static void
 hcrash(void)
 {
         if(debug['h']) {
                 flusherrors();
                 if(outfile)
                         unlink(outfile);
-                __builtin_trap();
+                abort();
         }
 }
 
 void
 yyerrorl(int line, char *fmt, ...)
 {
         va_list arg;
 
         va_start(arg, fmt);
         adderr(line, fmt, arg);
@@ skipping 3614 matching lines @@
 Strlit*
 strlit(char *s)
 {
         Strlit *t;
 ········
         t = mal(sizeof *t + strlen(s));
         strcpy(t->s, s);
         t->len = strlen(s);
         return t;
 }