| diff -durN gcc-4.4.4.orig/gcc/c-common.c gcc-4.4.4/gcc/c-common.c |
| --- gcc-4.4.4.orig/gcc/c-common.c 2009-11-05 15:57:57.000000000 +0100 |
| +++ gcc-4.4.4/gcc/c-common.c 2010-05-16 19:11:21.000000000 +0200 |
| @@ -301,7 +301,7 @@ |
| /* Warn about format/argument anomalies in calls to formatted I/O functions |
| (*printf, *scanf, strftime, strfmon, etc.). */ |
| |
| -int warn_format; |
| +int warn_format = 1; |
| |
| /* Warn about using __null (as NULL in C++) as sentinel. For code compiled |
| with GCC this doesn't matter as __null is guaranteed to have the right |
| diff -durN gcc-4.4.4.orig/gcc/c.opt gcc-4.4.4/gcc/c.opt |
| --- gcc-4.4.4.orig/gcc/c.opt 2009-09-18 23:53:23.000000000 +0200 |
| +++ gcc-4.4.4/gcc/c.opt 2010-05-16 19:11:21.000000000 +0200 |
| @@ -236,7 +236,7 @@ |
| Warn about format strings that contain NUL bytes |
| |
| Wformat-security |
| -C ObjC C++ ObjC++ Var(warn_format_security) Warning |
| +C ObjC C++ ObjC++ Var(warn_format_security) Init(1) Warning |
| Warn about possible security problems with format functions |
| |
| Wformat-y2k |
| diff -durN gcc-4.4.4.orig/gcc/doc/invoke.texi gcc-4.4.4/gcc/doc/invoke.texi |
| --- gcc-4.4.4.orig/gcc/doc/invoke.texi 2010-04-08 12:46:46.000000000 +0200 |
| +++ gcc-4.4.4/gcc/doc/invoke.texi 2010-05-16 19:11:21.000000000 +0200 |
| @@ -2888,6 +2888,9 @@ |
| @option{-Wformat-nonliteral}, @option{-Wformat-security}, and |
| @option{-Wformat=2} are available, but are not included in @option{-Wall}. |
| |
| +NOTE: In Gentoo, this option is enabled by default for C, C++, ObjC, ObjC++. |
| +To disable, use @option{-Wformat=0}. |
| + |
| @item -Wformat-y2k |
| @opindex Wformat-y2k |
| @opindex Wno-format-y2k |
| @@ -2941,6 +2944,11 @@ |
| in future warnings may be added to @option{-Wformat-security} that are not |
| included in @option{-Wformat-nonliteral}.) |
| |
| +NOTE: In Gentoo, this option is enabled by default for C, C++, ObjC, ObjC++. |
| +To disable, use @option{-Wno-format-security}, or disable all format warnings |
| +with @option{-Wformat=0}. To make format security warnings fatal, specify |
| +@option{-Werror=format-security}. |
| + |
| @item -Wformat=2 |
| @opindex Wformat=2 |
| @opindex Wno-format=2 |
