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 diff -dur libelf-0.8.10.orig/configure libelf-0.8.10/configure
2 --- libelf-0.8.10.orig/configure 2007-09-07 14:08:06.000000000 +0200
3 +++ libelf-0.8.10/configure 2008-10-23 22:43:19.000000000 +0200
5 echo $ac_n "(cached) $ac_c" 1>&6
7 if test "$cross_compiling" = yes; then
8 - ac_cv_sizeof_long_long=0
9 + ac_cv_sizeof_long_long=8
11 cat > conftest.$ac_ext <<EOF
12 #line 1602 "configure"
13 diff -dur libelf-0.8.10.orig/configure.in libelf-0.8.10/configure.in
14 --- libelf-0.8.10.orig/configure.in 2007-09-07 14:07:59.000000000 +0200
15 +++ libelf-0.8.10/configure.in 2008-10-23 22:43:10.000000000 +0200
17 AC_CHECK_SIZEOF(short,2)
18 AC_CHECK_SIZEOF(int,4)
19 AC_CHECK_SIZEOF(long,4)
20 -AC_CHECK_SIZEOF(long long,0)
21 +AC_CHECK_SIZEOF(long long,8)
23 AC_CHECK_SIZEOF(__int64, 0)