patches/gcc/4.4.0/150-default-fortify-source.patch
author Cody Schafer <dev@codyps.com>
Fri May 09 19:13:49 2014 -0700 (2014-05-09)
changeset 3312 4876ff97e039
permissions -rw-r--r--
cc/gcc: allow CC_EXTRA_CONFIG_ARRAY on baremetal

The final bare-metal compiler is built using the core backend.
Currently the core uses the CC_CORE_EXTRA_CONFIG_ARRAY variable.

While this works as supposed to, this can leave the user puzzled
in the menuconfig, since all he can see is the core options, not
the final options.

Only show the core options if any of the core passes are needed,
and use the final options in the core-backend if we're issuing
the bare-metal compiler.

Signed-off-by: Cody P Schafer <dev@codyps.com>
[yann.morin.1998@free.fr: hide core options if no core pass needed;
use final option in core backend if issuing the bare-metal compiler]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Message-Id: <22181e546ba746202489.1399688067@localhost>
Patchwork-Id: 347586
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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