| 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 |
