| author | "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr> |
| Tue Aug 02 18:28:10 2011 +0200 (2011-08-02) | |
| changeset 2590 | b64cfb67944e |
| parent 2149 | 98b7806295cc |
| permissions | -rw-r--r-- |
| yann@2149 | 1 |
diff -durN gcc-4.4.5.orig/gcc/doc/invoke.texi gcc-4.4.5/gcc/doc/invoke.texi |
| yann@2149 | 2 |
--- gcc-4.4.5.orig/gcc/doc/invoke.texi 2010-10-09 22:59:03.000000000 +0200 |
| yann@2149 | 3 |
+++ gcc-4.4.5/gcc/doc/invoke.texi 2010-10-09 22:59:33.000000000 +0200 |
| yann@2149 | 4 |
@@ -5432,6 +5432,11 @@ |
| yann@2149 | 5 |
Please note the warning under @option{-fgcse} about
|
| yann@2149 | 6 |
invoking @option{-O2} on programs that use computed gotos.
|
| yann@2149 | 7 |
|
| yann@2149 | 8 |
+NOTE: In Gentoo, @option{-D_FORTIFY_SOURCE=2} is set by default, and is
|
| yann@2149 | 9 |
+activated when @option{-O} is set to 2 or higher. This enables additional
|
| yann@2149 | 10 |
+compile-time and run-time checks for several libc functions. To disable, |
| yann@2149 | 11 |
+specify either @option{-U_FORTIFY_SOURCE} or @option{-D_FORTIFY_SOURCE=0}.
|
| yann@2149 | 12 |
+ |
| yann@2149 | 13 |
@item -O3 |
| yann@2149 | 14 |
@opindex O3 |
| yann@2149 | 15 |
Optimize yet more. @option{-O3} turns on all optimizations specified
|
| yann@2149 | 16 |
diff -durN gcc-4.4.5.orig/gcc/gcc.c gcc-4.4.5/gcc/gcc.c |
| yann@2149 | 17 |
--- gcc-4.4.5.orig/gcc/gcc.c 2010-01-09 01:05:06.000000000 +0100 |
| yann@2149 | 18 |
+++ gcc-4.4.5/gcc/gcc.c 2010-10-09 22:59:33.000000000 +0200 |
| yann@2149 | 19 |
@@ -807,6 +807,7 @@ |
| yann@2149 | 20 |
%{H} %C %{D*&U*&A*} %{i*} %Z %i\
|
| yann@2149 | 21 |
%{fmudflap:-D_MUDFLAP -include mf-runtime.h}\
|
| yann@2149 | 22 |
%{fmudflapth:-D_MUDFLAP -D_MUDFLAPTH -include mf-runtime.h}\
|
| yann@2149 | 23 |
+ %{!D_FORTIFY_SOURCE:%{!D_FORTIFY_SOURCE=*:%{!U_FORTIFY_SOURCE:-D_FORTIFY_SOURCE=2}}}\
|
| yann@2149 | 24 |
%{E|M|MM:%W{o*}}";
|
| yann@2149 | 25 |
|
| yann@2149 | 26 |
/* This contains cpp options which are common with cc1_options and are passed |