preprocessor/7312: bootstrap failure due to invalid use of errno

[Zack Weinberg]

http://gcc.gnu.org/PR?7312

I apologize for not noticing this bug earlier.  It's indeed a bug, but
I don't think your suggested fix is right.  At that point in the code,
nothing has been done to give errno a meaningful value, so ->err_no
should just be cleared to 0.

I will apply this patch later today, along with some other changes, if
bootstrap succeeds.

zw

        PR preprocessor/7312
        * cppfiles.c (find_or_create_entry): Initialize file->err_no
        to 0, not errno.

===================================================================
Index: cppfiles.c
--- cppfiles.c	21 Apr 2003 19:21:53 -0000	1.168
+++ cppfiles.c	9 May 2003 15:24:48 -0000
@@ -184,7 +184,7 @@ find_or_create_entry (pfile, fname)
       file = xcnew (struct include_file);
       file->name = name;
       file->header_name = name;
-      file->err_no = errno;
+      file->err_no = 0;
       node = splay_tree_insert (pfile->all_include_files,
 				(splay_tree_key) file->name,
 				(splay_tree_value) file);