[Bug testsuite/47479] make -j 12 RUNTESTFLAGS="--target_board 'unix{-m32,}'" isn't parallelized

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47479

--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> 2011-01-26 21:37:19 UTC ---
There are

$(lang_checks_parallelized): check-% : site.exp
        @if [ -z "$(filter-out --target_board=%, $(RUNTESTFLAGS))" ] \
            && [ "$(filter -j, $(MFLAGS))" = "-j" ]; then \

If there is a --target_board=, we don't parallelize.