2014-07-16 20:57 GMT+02:00 Niklas Larsson
I get the same failure when I try to build HEAD. Turns out the error occurs on the 32-bit Windows build, and my successful build was a 64-bit build. My 64-bit build still succeeds.
Perhaps you should specify -march=i586 for the C compiler? I have tried Johan's test program (posted in this thread earlier) with -march=i386 and it generates a function call for __sync_fetch_and_add_1(). (No cmpxchg?) In case of -march=i486, __sync_fetch_and_add_8() is generated (this cpu type does have a cmpxchg8b instruction). I faced this error earlier because the FreeBSD/i386 builder has been failing for a while [1] as it assumes -march=i486 by default. With -march=i586, everything builds just fine. On GNU/Linux, it is not a problem as it builds C code with -march=i686. [1] http://haskell.inf.elte.hu/builders/freebsd-i386-head/317/10.html