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 -uNpr gcc-4.2.1_orig/gcc/config/rs6000/darwin-ldouble.c gcc-4.2.1/gcc/config/rs6000/darwin-ldouble.c
2 --- gcc-4.2.1_orig/gcc/config/rs6000/darwin-ldouble.c 2007-03-05 11:54:00.000000000 -0500
3 +++ gcc-4.2.1/gcc/config/rs6000/darwin-ldouble.c 2008-01-31 17:51:24.000000000 -0500
4 @@ -70,6 +70,8 @@ Software Foundation, 51 Franklin Street,
5 but GCC currently generates poor code when a union is used to turn
6 a long double into a pair of doubles. */
8 +#if defined (_SOFT_FLOAT) && defined (__LONG_DOUBLE_128__)
10 long double __gcc_qadd (double, double, double, double);
11 long double __gcc_qsub (double, double, double, double);
12 long double __gcc_qmul (double, double, double, double);
13 @@ -219,8 +221,6 @@ __gcc_qdiv (double a, double b, double c
17 -#if defined (_SOFT_FLOAT) && defined (__LONG_DOUBLE_128__)
19 long double __gcc_qneg (double, double);
20 int __gcc_qeq (double, double, double, double);
21 int __gcc_qne (double, double, double, double);