yann@1393: diff -durN gcc-4.4.0.orig/gcc/c-common.c gcc-4.4.0/gcc/c-common.c
yann@1393: --- gcc-4.4.0.orig/gcc/c-common.c	2009-03-30 19:42:27.000000000 +0200
yann@1393: +++ gcc-4.4.0/gcc/c-common.c	2009-05-27 21:38:08.000000000 +0200
yann@1393: @@ -301,7 +301,7 @@
yann@1393:  /* Warn about format/argument anomalies in calls to formatted I/O functions
yann@1393:     (*printf, *scanf, strftime, strfmon, etc.).  */
yann@1393:  
yann@1393: -int warn_format;
yann@1393: +int warn_format = 1;
yann@1393:  
yann@1393:  /* Warn about using __null (as NULL in C++) as sentinel.  For code compiled
yann@1393:     with GCC this doesn't matter as __null is guaranteed to have the right
yann@1393: diff -durN gcc-4.4.0.orig/gcc/c.opt gcc-4.4.0/gcc/c.opt
yann@1393: --- gcc-4.4.0.orig/gcc/c.opt	2009-03-18 22:14:53.000000000 +0100
yann@1393: +++ gcc-4.4.0/gcc/c.opt	2009-05-27 21:38:08.000000000 +0200
yann@1393: @@ -236,7 +236,7 @@
yann@1393:  Warn about format strings that contain NUL bytes
yann@1393:  
yann@1393:  Wformat-security
yann@1393: -C ObjC C++ ObjC++ Var(warn_format_security) Warning
yann@1393: +C ObjC C++ ObjC++ Var(warn_format_security) Init(1) Warning
yann@1393:  Warn about possible security problems with format functions
yann@1393:  
yann@1393:  Wformat-y2k
yann@1393: diff -durN gcc-4.4.0.orig/gcc/doc/invoke.texi gcc-4.4.0/gcc/doc/invoke.texi
yann@1393: --- gcc-4.4.0.orig/gcc/doc/invoke.texi	2009-04-01 09:18:47.000000000 +0200
yann@1393: +++ gcc-4.4.0/gcc/doc/invoke.texi	2009-05-27 21:38:08.000000000 +0200
yann@1393: @@ -2867,6 +2867,9 @@
yann@1393:  @option{-Wformat-nonliteral}, @option{-Wformat-security}, and
yann@1393:  @option{-Wformat=2} are available, but are not included in @option{-Wall}.
yann@1393:  
yann@1393: +NOTE: In Gentoo, this option is enabled by default for C, C++, ObjC, ObjC++.
yann@1393: +To disable, use @option{-Wformat=0}.
yann@1393: +
yann@1393:  @item -Wformat-y2k
yann@1393:  @opindex Wformat-y2k
yann@1393:  @opindex Wno-format-y2k
yann@1393: @@ -2920,6 +2923,11 @@
yann@1393:  in future warnings may be added to @option{-Wformat-security} that are not
yann@1393:  included in @option{-Wformat-nonliteral}.)
yann@1393:  
yann@1393: +NOTE: In Gentoo, this option is enabled by default for C, C++, ObjC, ObjC++.
yann@1393: +To disable, use @option{-Wno-format-security}, or disable all format warnings
yann@1393: +with @option{-Wformat=0}.  To make format security warnings fatal, specify
yann@1393: +@option{-Werror=format-security}.
yann@1393: +
yann@1393:  @item -Wformat=2
yann@1393:  @opindex Wformat=2
yann@1393:  @opindex Wno-format=2