yann@1948: diff -durN gcc-4.4.4.orig/gcc/doc/invoke.texi gcc-4.4.4/gcc/doc/invoke.texi
yann@1948: --- gcc-4.4.4.orig/gcc/doc/invoke.texi	2010-05-16 19:11:21.000000000 +0200
yann@1948: +++ gcc-4.4.4/gcc/doc/invoke.texi	2010-05-16 19:11:30.000000000 +0200
yann@1948: @@ -5432,6 +5432,11 @@
yann@1948:  Please note the warning under @option{-fgcse} about
yann@1948:  invoking @option{-O2} on programs that use computed gotos.
yann@1948:  
yann@1948: +NOTE: In Gentoo, @option{-D_FORTIFY_SOURCE=2} is set by default, and is
yann@1948: +activated when @option{-O} is set to 2 or higher.  This enables additional
yann@1948: +compile-time and run-time checks for several libc functions.  To disable,
yann@1948: +specify either @option{-U_FORTIFY_SOURCE} or @option{-D_FORTIFY_SOURCE=0}.
yann@1948: +
yann@1948:  @item -O3
yann@1948:  @opindex O3
yann@1948:  Optimize yet more.  @option{-O3} turns on all optimizations specified
yann@1948: diff -durN gcc-4.4.4.orig/gcc/gcc.c gcc-4.4.4/gcc/gcc.c
yann@1948: --- gcc-4.4.4.orig/gcc/gcc.c	2010-01-09 01:05:06.000000000 +0100
yann@1948: +++ gcc-4.4.4/gcc/gcc.c	2010-05-16 19:11:30.000000000 +0200
yann@1948: @@ -807,6 +807,7 @@
yann@1948:   %{H} %C %{D*&U*&A*} %{i*} %Z %i\
yann@1948:   %{fmudflap:-D_MUDFLAP -include mf-runtime.h}\
yann@1948:   %{fmudflapth:-D_MUDFLAP -D_MUDFLAPTH -include mf-runtime.h}\
yann@1948: + %{!D_FORTIFY_SOURCE:%{!D_FORTIFY_SOURCE=*:%{!U_FORTIFY_SOURCE:-D_FORTIFY_SOURCE=2}}}\
yann@1948:   %{E|M|MM:%W{o*}}";
yann@1948:  
yann@1948:  /* This contains cpp options which are common with cc1_options and are passed