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-4.4.5.orig/libstdc++-v3/include/c_global/cstdio gcc-4.4.5/libstdc++-v3/include/c_global/cstdio
2 --- gcc-4.4.5.orig/libstdc++-v3/include/c_global/cstdio 2009-04-10 01:23:07.000000000 +0200
3 +++ gcc-4.4.5/libstdc++-v3/include/c_global/cstdio 2010-10-09 23:11:27.000000000 +0200
9 +#if _GLIBCXX_USE_C99 || defined __UCLIBC__