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 gentoo: gentoo/src/patchsets/gcc/4.3.1/uclibc/90_all_103-uclibc-conf-noupstream.patch
2 diff -durN gcc-4.3.1.orig/gcc/config.gcc gcc-4.3.1/gcc/config.gcc
3 --- gcc-4.3.1.orig/gcc/config.gcc 2008-06-10 14:58:09.000000000 +0200
4 +++ gcc-4.3.1/gcc/config.gcc 2008-06-10 14:58:36.000000000 +0200
7 sh-*-elf* | sh[12346l]*-*-elf* | sh*-*-kaos* | \
8 sh-*-symbianelf* | sh[12346l]*-*-symbianelf* | \
9 - sh-*-linux* | sh[346lbe]*-*-linux* | \
10 + sh*-*-linux* | sh[346lbe]*-*-linux* | \
11 sh-*-netbsdelf* | shl*-*-netbsdelf* | sh5-*-netbsd* | sh5l*-*-netbsd* | \
12 sh64-*-netbsd* | sh64l*-*-netbsd*)
13 tmake_file="${tmake_file} sh/t-sh sh/t-elf"