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 Original patch from H.J. Lu, as reported there:
2 http://www.nabble.com/PATCH:-Use-short-for-fnstsw-td14775171.html
4 fnstsw stores 16bit into %ax. The upper 16bit of %eax is unchanged.
5 The new assembler (binutils-2.18.50.0.4 and up) will disallow "fnstsw %eax".
7 diff -dur glibc-2.6.1.orig/sysdeps/i386/fpu/ftestexcept.c glibc-2.6.1/sysdeps/i386/fpu/ftestexcept.c
8 --- glibc-2.6.1.orig/sysdeps/i386/fpu/ftestexcept.c 2004-03-05 11:14:48.000000000 +0100
9 +++ glibc-2.6.1/sysdeps/i386/fpu/ftestexcept.c 2008-06-24 10:56:14.000000000 +0200
12 fetestexcept (int excepts)
18 /* Get current exceptions. */