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Warning for #line 32768
- To: gcc-patches at gcc dot gnu dot org
- Subject: Warning for #line 32768
- From: Alexandre Oliva <oliva at lsd dot ic dot unicamp dot br>
- Date: 16 Feb 2000 03:39:42 -0200
The ANSI C Standard says that a #line directive with a line number
non-positive or greater than 32767 invokes undefined behavior. We do
warn for <=0, but not for >32767. Ok to install?
Index: gcc/ChangeLog
from Alexandre Oliva <oliva@lsd.ic.unicamp.br>
* cpplib.c (do_line): Pedwarn for #line > 32767.
Index: gcc/cpplib.c
===================================================================
RCS file: /cvs/gcc/egcs/gcc/cpplib.c,v
retrieving revision 1.115
diff -u -r1.115 cpplib.c
--- gcc/cpplib.c 2000/02/14 07:57:30 1.115
+++ gcc/cpplib.c 2000/02/16 05:35:55
@@ -1346,7 +1346,7 @@
}
CPP_SET_WRITTEN (pfile, old_written);
- if (CPP_PEDANTIC (pfile) && new_lineno <= 0)
+ if (CPP_PEDANTIC (pfile) && (new_lineno <= 0 || new_lineno > 32767))
cpp_pedwarn (pfile, "line number out of range in `#line' command");
token = get_directive_token (pfile);
--
Alexandre Oliva http://www.ic.unicamp.br/~oliva/ Enjoy Guaranį
Cygnus Solutions, a Red Hat company aoliva@{redhat, cygnus}.com
Free Software Developer and Evangelist CS PhD student at IC-Unicamp
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