1 diff -durN gcc-4.4.0.orig/gcc/c-common.c gcc-4.4.0/gcc/c-common.c
3 diff -durN gcc-4.4.4.orig/gcc/c-common.c gcc-4.4.4/gcc/c-common.c
4 --- gcc-4.4.4.orig/gcc/c-common.c 2009-11-05 15:57:57.000000000 +0100
5 +++ gcc-4.4.4/gcc/c-common.c 2010-05-16 19:11:21.000000000 +0200
7 /* Warn about format/argument anomalies in calls to formatted I/O functions
8 (*printf, *scanf, strftime, strfmon, etc.). */
13 /* Warn about using __null (as NULL in C++) as sentinel. For code compiled
14 with GCC this doesn't matter as __null is guaranteed to have the right
15 diff -durN gcc-4.4.4.orig/gcc/c.opt gcc-4.4.4/gcc/c.opt
16 --- gcc-4.4.4.orig/gcc/c.opt 2009-09-18 23:53:23.000000000 +0200
17 +++ gcc-4.4.4/gcc/c.opt 2010-05-16 19:11:21.000000000 +0200
19 Warn about format strings that contain NUL bytes
22 -C ObjC C++ ObjC++ Var(warn_format_security) Warning
23 +C ObjC C++ ObjC++ Var(warn_format_security) Init(1) Warning
24 Warn about possible security problems with format functions
27 diff -durN gcc-4.4.4.orig/gcc/doc/invoke.texi gcc-4.4.4/gcc/doc/invoke.texi
28 --- gcc-4.4.4.orig/gcc/doc/invoke.texi 2010-04-08 12:46:46.000000000 +0200
29 +++ gcc-4.4.4/gcc/doc/invoke.texi 2010-05-16 19:11:21.000000000 +0200
31 @option{-Wformat-nonliteral}, @option{-Wformat-security}, and
32 @option{-Wformat=2} are available, but are not included in @option{-Wall}.
34 +NOTE: In Gentoo, this option is enabled by default for C, C++, ObjC, ObjC++.
35 +To disable, use @option{-Wformat=0}.
39 @opindex Wno-format-y2k
40 @@ -2941,6 +2944,11 @@
41 in future warnings may be added to @option{-Wformat-security} that are not
42 included in @option{-Wformat-nonliteral}.)
44 +NOTE: In Gentoo, this option is enabled by default for C, C++, ObjC, ObjC++.
45 +To disable, use @option{-Wno-format-security}, or disable all format warnings
46 +with @option{-Wformat=0}. To make format security warnings fatal, specify
47 +@option{-Werror=format-security}.