Error building ghc on raspberry pi.

[Karel Gardas]

Hi,

find ghc's generated settings file. What FPU is used there?

Thanks,
Karel

On 01/ 9/13 09:47 PM, roconnor at theorem.ca wrote:
> Thanks for the advice; However, it had little effect.
>
> I now have the errors:
>
> ===--- building final phase
> make -r --no-print-directory -f ghc.mk phase=final all
> LD libraries/ghc-prim/dist-install/build/HSghc-prim-0.3.0.0.o
> /usr/bin/ld: error:
> libraries/ghc-prim/dist-install/build/GHC/PrimopWrappers.o uses VFP
> register arguments,
> libraries/ghc-prim/dist-install/build/HSghc-prim-0.3.0.0.o does not
> /usr/bin/ld: failed to merge target specific data of file
> libraries/ghc-prim/dist-install/build/GHC/PrimopWrappers.o
> /usr/bin/ld: error: libraries/ghc-prim/dist-install/build/cbits/debug.o
> uses VFP register arguments,
> libraries/ghc-prim/dist-install/build/HSghc-prim-0.3.0.0.o does not
> /usr/bin/ld: failed to merge target specific data of file
> libraries/ghc-prim/dist-install/build/cbits/debug.o
> /usr/bin/ld: error:
> libraries/ghc-prim/dist-install/build/cbits/longlong.o uses VFP register
> arguments, libraries/ghc-prim/dist-install/build/HSghc-prim-0.3.0.0.o
> does not
> /usr/bin/ld: failed to merge target specific data of file
> libraries/ghc-prim/dist-install/build/cbits/longlong.o
> /usr/bin/ld: error: libraries/ghc-prim/dist-install/build/cbits/popcnt.o
> uses VFP register arguments,
> libraries/ghc-prim/dist-install/build/HSghc-prim-0.3.0.0.o does not
> /usr/bin/ld: failed to merge target specific data of file
> libraries/ghc-prim/dist-install/build/cbits/popcnt.o
> make[1]: ***
> [libraries/ghc-prim/dist-install/build/HSghc-prim-0.3.0.0.o] Error 1
>
> Anyone else building GHC on a pi?
>
> On Tue, 8 Jan 2013, Thijs Alkemade wrote:
>
>>
>> Op 8 jan. 2013, om 05:16 heeft roconnor at theorem.ca het volgende
>> geschreven:
>>
>>> On Thu, 3 Jan 2013, Thijs Alkemade wrote:
>>>
>>>> I believe I had the same problem, which disappeared after upgrading
>>>> llvm from 3.0 to 3.1, and using that instead for ./configure.
>>>>
>>>> Hope this helps,
>>>> Thijs
>>>
>>> Thanks, using LLVM 3.1 seems to have improved the siutation, but I'm
>>> running into a new error.
>>>
>>> Here is the error I get when trying to build GHC 7.6.1 from 7.4.1
>>>
>>> ===--- building final phase
>>> make -r --no-print-directory -f ghc.mk phase=final all
>>> LD libraries/ghc-prim/dist-install/build/HSghc-prim-0.3.0.0.o
>>> /usr/bin/ld: error:
>>> libraries/ghc-prim/dist-install/build/cbits/debug.o uses VFP register
>>> arguments, libraries/ghc-prim/dist-install/build/HSghc-prim-0.3.0.0.o
>>> does not
>>> /usr/bin/ld: failed to merge target specific data of file
>>> libraries/ghc-prim/dist-install/build/cjjbits/debug.o
>>> /usr/bin/ld: error:
>>> libraries/ghc-prim/dist-install/build/cbits/longlong.o uses VFP
>>> register arguments,
>>> libraries/ghc-prim/dist-install/build/HSghc-prim-0.3.0.0.o does not
>>> /usr/bin/ld: failed to merge target specific data of file
>>> libraries/ghc-prim/dist-install/build/cbits/longlong.o
>>> /usr/bin/ld: error:
>>> libraries/ghc-prim/dist-install/build/cbits/popcnt.o uses VFP
>>> register arguments,
>>> libraries/ghc-prim/dist-install/build/HSghc-prim-0.3.0.0.o does not
>>> /usr/bin/ld: failed to merge target specific data of file
>>> libraries/ghc-prim/dist-install/build/cbits/popcnt.o
>>> make[1]: ***
>>> [libraries/ghc-prim/dist-install/build/HSghc-prim-0.3.0.0.o] Error 1
>>>
>>> I get similar errors when building GHC 7.4.1 (patched with
>>> http://hackage.haskell.org/trac/ghc/attachment/ticket/5914/0001-add-support-for-ARM-hard-float-ABI-fixes-5914.patch).
>>>
>>>
>>> Any of you encountered this problem before?
>>>
>>
>> Yeah, I had a lot of these. The problem was that GHC has a lot of
>> different "CFLAGS",
>> so finding the right way to pass "-float-abi=hard" to every one of
>> them took some time, but
>> eventually I ended up with the following change to mk/build.mk:
>>
>> ifeq "$(BuildFlavour)" "quick"
>>
>> SRC_HC_OPTS = -H64m -O0 -fasm
>> GhcStage1HcOpts = -O -fasm
>> GhcStage2HcOpts = -O0 -fasm
>> GhcLibHcOpts = -O -fasm -optlc-float-abi=hard
>> SplitObjs = NO
>> HADDOCK_DOCS = NO
>> BUILD_DOCBOOK_HTML = NO
>> BUILD_DOCBOOK_PS = NO
>> BUILD_DOCBOOK_PDF = NO
>>
>> endif
>>
>> (Change the build flavor you are using, of course)
>>
>> And I ran configure as:
>>
>> LDFLAGS="-marm -mfloat-abi=hard -mfpu=vfp" CFLAGS="-marm
>> -mfloat-abi=hard -mfpu=vfp" ./configure --with-opt=/usr/bin/opt-3.1
>> --with-llc=/usr/bin/llc-3.1 --with-ld=`which ld.gold`
>>
>> (I switched to the gold linker, because ld was running out of RAM often.)
>>
>> I did eventually finish building stage2, but the final executable
>> segfaulted on start.
>> I haven't investigated much why that happened, the days it takes to
>> rebuild it just
>> made me give up.
>>
>> Hope this helps,
>> Thijs
>