cc/gcc: set CXXFLAGS at configure gcc
Since gcc 4.8 C++ is also used as implementation language (see gcc
release notes).
Signed-off-by: "Daniel Dittmann" <ddittmann@gmx.net>
Message-Id: <acc7d11bc77b30f21c5b.1388863298@bernalk.machteam>
Patchwork-Id: 306883
1 diff -durN gcc-4.4.4.orig/gcc/doc/invoke.texi gcc-4.4.4/gcc/doc/invoke.texi
2 --- gcc-4.4.4.orig/gcc/doc/invoke.texi 2010-05-16 19:11:21.000000000 +0200
3 +++ gcc-4.4.4/gcc/doc/invoke.texi 2010-05-16 19:11:30.000000000 +0200
5 Please note the warning under @option{-fgcse} about
6 invoking @option{-O2} on programs that use computed gotos.
8 +NOTE: In Gentoo, @option{-D_FORTIFY_SOURCE=2} is set by default, and is
9 +activated when @option{-O} is set to 2 or higher. This enables additional
10 +compile-time and run-time checks for several libc functions. To disable,
11 +specify either @option{-U_FORTIFY_SOURCE} or @option{-D_FORTIFY_SOURCE=0}.
15 Optimize yet more. @option{-O3} turns on all optimizations specified
16 diff -durN gcc-4.4.4.orig/gcc/gcc.c gcc-4.4.4/gcc/gcc.c
17 --- gcc-4.4.4.orig/gcc/gcc.c 2010-01-09 01:05:06.000000000 +0100
18 +++ gcc-4.4.4/gcc/gcc.c 2010-05-16 19:11:30.000000000 +0200
20 %{H} %C %{D*&U*&A*} %{i*} %Z %i\
21 %{fmudflap:-D_MUDFLAP -include mf-runtime.h}\
22 %{fmudflapth:-D_MUDFLAP -D_MUDFLAPTH -include mf-runtime.h}\
23 + %{!D_FORTIFY_SOURCE:%{!D_FORTIFY_SOURCE=*:%{!U_FORTIFY_SOURCE:-D_FORTIFY_SOURCE=2}}}\
26 /* This contains cpp options which are common with cc1_options and are passed