cc/gcc: Apply CT_CC_GCC_DISABLE_PCH to do_cc_core.
Otherwise, users have to input --disable-libstdcxx-pch option
when building bare-metal CANADIAN C++ compiler.
Reviewed-by: Michael Hope
Signed-off-by: Zhenqiang Chen <zhenqiang.chen@linaro.org>
(transplanted from e3e1c9d45bddfbfb433ee9d583faf42fa31f50c0)
1 diff -durN gcc-4.4.0.orig/boehm-gc/include/gc.h gcc-4.4.0/boehm-gc/include/gc.h
2 --- gcc-4.4.0.orig/boehm-gc/include/gc.h 2007-04-23 23:10:09.000000000 +0200
3 +++ gcc-4.4.0/boehm-gc/include/gc.h 2009-05-27 21:38:55.000000000 +0200
5 #if defined(__linux__) || defined(__GLIBC__)
7 # if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 1 || __GLIBC__ > 2) \
8 - && !defined(__ia64__)
9 + && !defined(__ia64__) && !defined(__UCLIBC__)
10 # ifndef GC_HAVE_BUILTIN_BACKTRACE
11 # define GC_HAVE_BUILTIN_BACKTRACE