Carter was having difficulty compiling on OS X 10.9 with Xcode 6.0, so I tried building head and ran into some issues. 1) I used to build using make -j, but this fails with cryptic errors now. ./validate (which uses -j) and "make" seem to work. The specific error (appearing somewhere during stage 2 build) is: Couldn't figure out C compiler information! Warning: Make sure you're using GNU gcc, or clang Furthermore, when trying to run ./validate --fast I run into 4 unexpected failures. If anyone can tell me how I can get the test suite to report the exact difference in output I will send those along. Unexpected results from: TEST="cabal01 T5435_dyn_asm subsections_via_symbols cabal06 T4801" OVERALL SUMMARY for test run started at Sat Nov 22 21:35:31 2014 PST 0:07:30 spent to go through 4230 total tests, which gave rise to 13843 test cases, of which 9956 were skipped 53 had missing libraries 3763 expected passes 66 expected failures 0 caused framework failures 0 unexpected passes 4 unexpected failures 1 unexpected stat failures Unexpected failures: cabal/cabal01 cabal01 [bad exit code] (normal) cabal/cabal06 cabal06 [bad stdout] (normal) llvm/should_run/subsections_via_symbols subsections_via_symbols [bad exit code] (normal) rts T5435_dyn_asm [bad stdout] (normal) Unexpected stat failures: perf/compiler T4801 [stat too good] (normal) Cheers, Merijn