fix for the #include_next, v3

  don't give an error and simply ingnore directive
  if we detect a loop of the #include_next.

  With this aproach coreutils-8.24.51-8802e
  compiles, but with errors:
  	lib/libcoreutils.a: error: 'xnmalloc' defined twice
	lib/libcoreutils.a: error: 'xnrealloc' defined twice

1 files changed, 4 insertions, 14 deletions

diff --git a/tccpp.c b/tccpp.c
index 849ba8e..770873f 100644
--- a/tccpp.c
+++ b/tccpp.c
@@ -1528,7 +1528,7 @@ ST_FUNC void preprocess(int is_bof)
     int i, c, n, saved_parse_flags;
     char buf[1024], *q;
     Sym *s;
-    int include_next_first_try = 1;
+    int include_next_count = 0;
 
     saved_parse_flags = parse_flags;
     parse_flags = PARSE_FLAG_PREPROCESS
@@ -1618,7 +1618,6 @@ ST_FUNC void preprocess(int is_bof)
         /* store current file in stack, but increment stack later below */
         *s1->include_stack_ptr = file;
 
-     search_again:
         n = s1->nb_include_paths + s1->nb_sysinclude_paths;
         for (i = -2; i < n; ++i) {
             char buf1[sizeof file->filename];
@@ -1654,19 +1653,13 @@ ST_FUNC void preprocess(int is_bof)
 
             if (tok == TOK_INCLUDE_NEXT) {
                 for (f = s1->include_stack_ptr; f >= s1->include_stack; --f)
-            	  if (include_next_first_try) {
                     if (0 == PATHCMP((*f)->filename, buf1)) {
 #ifdef INC_DEBUG
                         printf("%s: #include_next skipping %s\n", file->filename, buf1);
 #endif
-			include_next_first_try++;
+			include_next_count++;
                         goto include_trynext;
                     }
-            	  } else {
-                    if (0 == PATHCMP(file->filename, buf1)) {
-                        goto include_trynext;
-                    }
-            	  }
             }
 
             e = search_cached_include(s1, buf1);
@@ -1698,11 +1691,8 @@ include_trynext:
             ch = file->buf_ptr[0];
             goto the_end;
         }
-        if (include_next_first_try > 1) {
-    	    include_next_first_try = 0;
-    	    goto search_again;
-        }
-        tcc_error("include file '%s' not found", buf);
+        if (include_next_count == 0)
+    	    tcc_error("include file '%s' not found", buf);
 include_done:
         break;
     case TOK_IFNDEF: