patches/gcc/4.4.2/150-default-fortify-source.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Sat Jan 22 23:20:18 2011 +0100 (2011-01-22)
changeset 2305 2ed26c646568
parent 1544 2228ea3f6b79
permissions -rw-r--r--
scripts: create the makeinfo wrapper before we set PATH

If we set PATH to the tools wrappers before we create the
makeinfo wrapper, then we may well wrap an existing wrapper
from a previous run.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
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diff -durN gcc-4.4.0.orig/gcc/doc/invoke.texi gcc-4.4.0/gcc/doc/invoke.texi
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--- gcc-4.4.0.orig/gcc/doc/invoke.texi	2009-05-27 21:38:11.000000000 +0200
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+++ gcc-4.4.0/gcc/doc/invoke.texi	2009-05-27 21:38:11.000000000 +0200
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@@ -5411,6 +5411,11 @@
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 Please note the warning under @option{-fgcse} about
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 invoking @option{-O2} on programs that use computed gotos.
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+NOTE: In Gentoo, @option{-D_FORTIFY_SOURCE=2} is set by default, and is
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+activated when @option{-O} is set to 2 or higher.  This enables additional
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+compile-time and run-time checks for several libc functions.  To disable,
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+specify either @option{-U_FORTIFY_SOURCE} or @option{-D_FORTIFY_SOURCE=0}.
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+
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 @item -O3
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 @opindex O3
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 Optimize yet more.  @option{-O3} turns on all optimizations specified
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diff -durN gcc-4.4.0.orig/gcc/gcc.c gcc-4.4.0/gcc/gcc.c
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--- gcc-4.4.0.orig/gcc/gcc.c	2009-03-17 22:25:59.000000000 +0100
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+++ gcc-4.4.0/gcc/gcc.c	2009-05-27 21:38:11.000000000 +0200
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@@ -807,6 +807,7 @@
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  %{H} %C %{D*&U*&A*} %{i*} %Z %i\
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  %{fmudflap:-D_MUDFLAP -include mf-runtime.h}\
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  %{fmudflapth:-D_MUDFLAP -D_MUDFLAPTH -include mf-runtime.h}\
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+ %{!D_FORTIFY_SOURCE:%{!D_FORTIFY_SOURCE=*:%{!U_FORTIFY_SOURCE:-D_FORTIFY_SOURCE=2}}}\
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  %{E|M|MM:%W{o*}}";
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 /* This contains cpp options which are common with cc1_options and are passed