blob: ad5a7e8a803b203a4a64aeb51d565506f7380a59 [file] [log] [blame]
diff -durN gcc-4.4.5.orig/gcc/doc/invoke.texi gcc-4.4.5/gcc/doc/invoke.texi
--- gcc-4.4.5.orig/gcc/doc/invoke.texi 2010-10-09 22:59:03.000000000 +0200
+++ gcc-4.4.5/gcc/doc/invoke.texi 2010-10-09 22:59:33.000000000 +0200
@@ -5432,6 +5432,11 @@
Please note the warning under @option{-fgcse} about
invoking @option{-O2} on programs that use computed gotos.
+NOTE: In Gentoo, @option{-D_FORTIFY_SOURCE=2} is set by default, and is
+activated when @option{-O} is set to 2 or higher. This enables additional
+compile-time and run-time checks for several libc functions. To disable,
+specify either @option{-U_FORTIFY_SOURCE} or @option{-D_FORTIFY_SOURCE=0}.
+
@item -O3
@opindex O3
Optimize yet more. @option{-O3} turns on all optimizations specified
diff -durN gcc-4.4.5.orig/gcc/gcc.c gcc-4.4.5/gcc/gcc.c
--- gcc-4.4.5.orig/gcc/gcc.c 2010-01-09 01:05:06.000000000 +0100
+++ gcc-4.4.5/gcc/gcc.c 2010-10-09 22:59:33.000000000 +0200
@@ -807,6 +807,7 @@
%{H} %C %{D*&U*&A*} %{i*} %Z %i\
%{fmudflap:-D_MUDFLAP -include mf-runtime.h}\
%{fmudflapth:-D_MUDFLAP -D_MUDFLAPTH -include mf-runtime.h}\
+ %{!D_FORTIFY_SOURCE:%{!D_FORTIFY_SOURCE=*:%{!U_FORTIFY_SOURCE:-D_FORTIFY_SOURCE=2}}}\
%{E|M|MM:%W{o*}}";
/* This contains cpp options which are common with cc1_options and are passed