disable cilk build/test on unsupported target?

[Tim Prince]

I built gcc with partial success:

Platform: x86_64-unknown-cygwin
configure flags: --prefix=/usr/local/gcc4.9/ --enable-languages='c c++ 
fortran' --enable-libgomp --enable-threads=posix --disable-libmudflap 
--disable-__cxa_atexit --with-dwarf2 --without-libiconv-prefix 
--without-libintl-prefix --with-system-zlib

As far as I've been able to find out, there's no support for cilkrts on 
this target, so I would have thought there would be a way to skip those 
tests.  I do have the Intel supplied library for ICL/visual studio.

Apparently there's also a problem with stabs ( relocation truncated to 
fit: R_X86_64_32 against `.text'), at least according to the options 
chosen in make check:
.....
FAIL: gcc.dg/debug/20020220-1.c -gstabs1 (test for excess errors)
UNRESOLVED: gcc.dg/debug/20020220-1.c -gstabs1 compilation failed to 
produce executable

I'm surprised not to find any test result quoted for this target, so the 
configure is my own guess.
gfortran seems to run well enough;  gcc builds have a tendency to hang 
when running tests involving ? operator and attempted vectorization.

-- 
Tim Prince