[commit: ghc] master: Find LLVM tools when version number at end (e.g., llc-3.0) (#7661) (64aaaa1)

[Karel Gardas]

On 02/15/13 07:35 PM, Ian Lynagh wrote:
> On Fri, Feb 15, 2013 at 07:21:54PM +0100, Karel Gardas wrote:
>> On 02/15/13 07:03 PM, Ian Lynagh wrote:
>>>> +        $1=`${FindCmd} ${GOOD_PATH} -type f -perm +111 -maxdepth 1 -regex '.*/$3-[[0-9]]\.[[0-9]]' | ${SortCmd} -n | tail -1`
>>>
>>> This feels rather unpleasant to me. Is it likely that someone will have
>>> programs called llc-3.0 etc, but no llc?
>>
>> Yes, Ubuntu 12.04 LTS installs LLVM 3.0 package in a way that, the
>> package binaries are installed into /usr/lib/llvm-3.0 directory and
>> inside /usr/bin there are llc-3.0 and opt-3.0 links created linking
>> to ../lib/llvm-3.0/bin/{llc|opt}.
>>
>> So David is fixing real-world issue here.
>
> But if you install 'llvm' (rather than 'llvm-3.0') then you get a
> /usr/bin/llc
>

Yes, but in case of ubuntu this is LLVM 2.9 which is pretty useless on 
ARM. For ARM you need to install LLVM 3.0. Anyway, please read a 
description of http://hackage.haskell.org/trac/ghc/ticket/7661

Also I don't lobby for this fix, I'm perfectly happy with 
--with-llc/--with-opt configure options as I've used them up to now... 
or even for more simpler workaround like export 
PATH=/usr/lib/llvm-3.0/bin:$PATH

Thanks,
Karel