On 10/14/2016 8:56 AM, Paul Smith wrote: > On Fri, 2016-10-14 at 07:39 +0300, fedor_qd@xxxxxxx wrote: >>>> Do 'make -j 2' to speed it up by running two jobs in parallel (or >>>> replace 4 with a higher number depending on how many cores you >>>> have). >> make -j"n cores" was cause gcc build fail to me some time ago. > It's worked fine for me for a number of releases now, since at least GCC > 4.9 for sure. But I'm building on GNU/Linux not Windows. make -j 3 works well on cygwin/win8.1 for build (not check). See my recent testsuite posts for 6.2.1 (looks good) and 7.0 (gfortran broken). Build takes about 4 hours on a slow laptop, make check about 35 hours (and 7.0 requires some manual kills). Windows 10 doesn't appear capable of building natively; maybe it could cross compile using the Ubuntu subsystem, but make check-c and check-c++ hang the linux subsystem. -- Tim Prince