scripts, cc/gcc: do not fail on existing symlinks or build.log
If the user builds a toolchain over an existing one, so, without removing
CT_PREFIX_DIR, the build fails as the symlinks already exist, as does the
build.log.
This can also happen (for build.log) if the user first ran in download-
or extract-only.
Patch (with no SoB) originally from:
Phil Wilshire <phil.wilshire@overturenetworks.com>
Modified by me as it did not apply cleanly.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
(transplanted from 1ebc2248cc60230cd53ff94ae8f8f1e3261461a3)
1 Original patch from: ../4.3.2/290-index_macro.patch
3 -= BEGIN original header =-
4 Original patch from gentoo: gentoo/src/patchsets/gcc/4.3.1/uclibc/90_all_304-index_macro.patch
5 -= END original header =-
7 diff -durN gcc-4.3.3.orig/libstdc++-v3/include/ext/rope gcc-4.3.3/libstdc++-v3/include/ext/rope
8 --- gcc-4.3.3.orig/libstdc++-v3/include/ext/rope 2008-07-15 12:14:51.000000000 +0200
9 +++ gcc-4.3.3/libstdc++-v3/include/ext/rope 2009-01-27 22:25:41.000000000 +0100
11 #include <bits/gthr.h>
12 #include <tr1/functional>
14 +/* cope w/ index defined as macro, SuSv3 proposal */
18 # define __GC_CONST const
20 diff -durN gcc-4.3.3.orig/libstdc++-v3/include/ext/ropeimpl.h gcc-4.3.3/libstdc++-v3/include/ext/ropeimpl.h
21 --- gcc-4.3.3.orig/libstdc++-v3/include/ext/ropeimpl.h 2007-05-04 17:06:46.000000000 +0200
22 +++ gcc-4.3.3/libstdc++-v3/include/ext/ropeimpl.h 2009-01-27 22:25:41.000000000 +0100
24 #include <ext/memory> // For uninitialized_copy_n
25 #include <ext/numeric> // For power
27 +/* cope w/ index defined as macro, SuSv3 proposal */
30 _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)