[Bug sanitizer/61955] libsanitizer fails to compile on RHEL4

[tortoise_74 at yahoo dot co.uk]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61955

--- Comment #3 from Bruce Adams <tortoise_74 at yahoo dot co.uk> ---
Running configure using --disable-libcilkrts (in addition to
--disable-libsanitiser) which is not documented results in a useable gcc 4.9.1
(with c++ working but presumably cilk++ broken).