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 -durN gcc-4.4.0.orig/gcc/config/alpha/alpha.h gcc-4.4.0/gcc/config/alpha/alpha.h
2 --- gcc-4.4.0.orig/gcc/config/alpha/alpha.h 2009-02-20 16:20:38.000000000 +0100
3 +++ gcc-4.4.0/gcc/config/alpha/alpha.h 2009-05-27 21:37:58.000000000 +0200
8 +#define CPP_SPEC "%{!no-ieee:-mieee}"
10 #define WORD_SWITCH_TAKES_ARG(STR) \
11 (!strcmp (STR, "rpath") || DEFAULT_WORD_SWITCH_TAKES_ARG(STR))
13 diff -durN gcc-4.4.0.orig/gcc/config/alpha/alpha.opt gcc-4.4.0/gcc/config/alpha/alpha.opt
14 --- gcc-4.4.0.orig/gcc/config/alpha/alpha.opt 2007-08-02 12:49:31.000000000 +0200
15 +++ gcc-4.4.0/gcc/config/alpha/alpha.opt 2009-05-27 21:37:58.000000000 +0200
17 Request IEEE-conformant math library routines (OSF/1)
20 -Target Report RejectNegative Mask(IEEE)
21 +Target Report Mask(IEEE)
22 Emit IEEE-conformant code, without inexact exceptions