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patches/gcc/4.4.4/140-default-format-security.patch
author Trevor Woerner <twoerner@gmail.com>
Wed Nov 16 16:06:42 2011 -0500 (2011-11-16)
changeset 2753 710fa859bfe6
parent 1948 d341be24dc68
permissions -rw-r--r--
docs: --target versus --host

In the very beginnings, eons ago, autotools also got confused by this
whole build vs. host vs. target, and got it wrong. Now they fixed it,
but they want to keep backward compatibility, so the --target is still
recongised, although ./configure will complain if you do so. It is
better to use --host.

Signed-off-by: "Trevor Woerner" <twoerner@gmail.com>
[yann.morin.1998@anciens.enib.fr: add build/host clarification]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr> 
     1 diff -durN gcc-4.4.4.orig/gcc/c-common.c gcc-4.4.4/gcc/c-common.c

     2 --- gcc-4.4.4.orig/gcc/c-common.c	2009-11-05 15:57:57.000000000 +0100

     3 +++ gcc-4.4.4/gcc/c-common.c	2010-05-16 19:11:21.000000000 +0200

     4 @@ -301,7 +301,7 @@

     5  /* Warn about format/argument anomalies in calls to formatted I/O functions

     6     (*printf, *scanf, strftime, strfmon, etc.).  */

     7  

     8 -int warn_format;

     9 +int warn_format = 1;

    10  

    11  /* Warn about using __null (as NULL in C++) as sentinel.  For code compiled

    12     with GCC this doesn't matter as __null is guaranteed to have the right

    13 diff -durN gcc-4.4.4.orig/gcc/c.opt gcc-4.4.4/gcc/c.opt

    14 --- gcc-4.4.4.orig/gcc/c.opt	2009-09-18 23:53:23.000000000 +0200

    15 +++ gcc-4.4.4/gcc/c.opt	2010-05-16 19:11:21.000000000 +0200

    16 @@ -236,7 +236,7 @@

    17  Warn about format strings that contain NUL bytes

    18  

    19  Wformat-security

    20 -C ObjC C++ ObjC++ Var(warn_format_security) Warning

    21 +C ObjC C++ ObjC++ Var(warn_format_security) Init(1) Warning

    22  Warn about possible security problems with format functions

    23  

    24  Wformat-y2k

    25 diff -durN gcc-4.4.4.orig/gcc/doc/invoke.texi gcc-4.4.4/gcc/doc/invoke.texi

    26 --- gcc-4.4.4.orig/gcc/doc/invoke.texi	2010-04-08 12:46:46.000000000 +0200

    27 +++ gcc-4.4.4/gcc/doc/invoke.texi	2010-05-16 19:11:21.000000000 +0200

    28 @@ -2888,6 +2888,9 @@

    29  @option{-Wformat-nonliteral}, @option{-Wformat-security}, and

    30  @option{-Wformat=2} are available, but are not included in @option{-Wall}.

    31  

    32 +NOTE: In Gentoo, this option is enabled by default for C, C++, ObjC, ObjC++.

    33 +To disable, use @option{-Wformat=0}.

    34 +

    35  @item -Wformat-y2k

    36  @opindex Wformat-y2k

    37  @opindex Wno-format-y2k

    38 @@ -2941,6 +2944,11 @@

    39  in future warnings may be added to @option{-Wformat-security} that are not

    40  included in @option{-Wformat-nonliteral}.)

    41  

    42 +NOTE: In Gentoo, this option is enabled by default for C, C++, ObjC, ObjC++.

    43 +To disable, use @option{-Wno-format-security}, or disable all format warnings

    44 +with @option{-Wformat=0}.  To make format security warnings fatal, specify

    45 +@option{-Werror=format-security}.

    46 +

    47  @item -Wformat=2

    48  @opindex Wformat=2

    49  @opindex Wno-format=2
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