Sorry for the noise, it turns out there's already a trac ticket:
https://ghc.haskell.org/trac/ghc/ticket/8561
(I didn't find it because I was searching for ___builtin… instead of __builtin!)
On Tue, Nov 26, 2013 at 3:39 PM, Amos Robinson
Hi, I'm having trouble linking with head:
[1 of 1] Compiling Main ( bindisttest/HelloWorld.lhs, bindisttest/HelloWorld.o ) Linking bindisttest/HelloWorld ... Undefined symbols for architecture x86_64: "___builtin___clear_cache", referenced from: _flushExec in libHSrts.a(Storage.o) ld: symbol(s) not found for architecture x86_64 collect2: ld returned 1 exit status
This is on OSX 10.8.5, where gcc --version gives me
i686-apple-darwin11-llvm-gcc-4.2 (GCC) 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.11.00)
I get the impression that this commit is related. Is it the case that Apple switched from gcc to clang recently? Could that be why ___builtin__clear_cache is missing?
I'm sorry, I don't really know anything about the runtime system, so am kind of stuck.
--SNIP--