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_303-c99-complex-ugly-hack.patch
2 diff -durN gcc-4.3.2.orig/libstdc++-v3/configure gcc-4.3.2/libstdc++-v3/configure
3 --- gcc-4.3.2.orig/libstdc++-v3/configure 2008-07-07 21:49:54.000000000 +0200
4 +++ gcc-4.3.2/libstdc++-v3/configure 2008-09-23 19:45:27.000000000 +0200
5 @@ -38935,6 +38935,9 @@
6 cat >>conftest.$ac_ext <<_ACEOF
10 +#error ugly hack to make sure configure test fails here for cross until uClibc supports the complex funcs