Link error with head Re: [commit: ghc] master: GHCi: Properly generate jump code for ARM (#8380) (5bab1a5)

Amos Robinson amos.robinson at
Tue Nov 26 04:55:37 UTC 2013

Sorry for the noise, it turns out there's already a trac ticket:
(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 <amos.robinson at> wrote:
> 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.

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