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 Hack from Debian to hopefully get sandbox working on mips
3 <`Kumba> ths: given the SHN_UNDEF thing is a hack, what's the preferred solution?
4 <ths> For fakeroot the simplest trigger is "fakeroot file /bin/ls".
5 <ths> `Kumba: I haven't found a better one yet.
6 <ths> Probably marker symbols around the stub section, and then exclude it from the link map.
7 <ths> This needs a ld change.
9 diff -durN glibc-2.10.1.orig/elf/do-lookup.h glibc-2.10.1/elf/do-lookup.h
10 --- glibc-2.10.1.orig/elf/do-lookup.h 2009-03-30 23:14:32.000000000 +0200
11 +++ glibc-2.10.1/elf/do-lookup.h 2009-11-13 00:51:36.000000000 +0100
17 + /* HACK: MIPS marks its lazy evaluation stubs with SHN_UNDEF
18 + symbols, we skip them. */
19 + if (sym->st_shndx == SHN_UNDEF)
22 /* Global definition. Just what we need. */
24 result->m = (struct link_map *) map;