Flag warnings show intermediate hscpp filenames on SmartOS

[Karel Gardas]

Also related: https://haskell-phabricator.global.ssl.fastly.net/D151

as Solaris is not the only problematic platform with CPP, HVR has 
started excellent 'RFC: "Native -XCPP" Proposal' thread in the past 
together with the wiki page: 
https://ghc.haskell.org/trac/ghc/wiki/Proposal/NativeCpp

Hope this helps,
Karel


On 12/31/15 09:28 AM, Karel Gardas wrote:
>
> Hi Alain,
>
> I guess you are hit by well known issue in GCC's CPP on Solaris. Just
> verify here:
>
> https://gcc.gnu.org/ml/gcc/2014-08/msg00114.html
>
> solution in this case is simple: use configure option to set different
> non buggy CPP as a CPP for GHC.
>
> Please let me know if this is the culprit,
>
> Thanks,
> Karel
>
> On 12/31/15 08:09 AM, Alain O'Dea wrote:
>> On SmartOS GHC flag warnings show up like this:
>> /tmp/ghc72341_0/ghc_1.hscpp:7:16: Warning:
>>      -fffi is deprecated: use -XForeignFunctionInterface or pragma {-#
>> LANGUAGE ForeignFunctionInterface #-} instead
>>
>> It appears that this line in DriverPipeline leads to the correct
>> filename in warnings on Ubuntu, but not on SmartOS:
>> src_opts <- liftIO $ getOptionsFromFile dflags0 output_fn
>> https://github.com/ghc/ghc/blob/bb7f2e33197e667eb694bd1243f125c722a0a868/compiler/main/DriverPipeline.hs#L865
>>
>>
>> How does the intermediate hscpp filename get restored to a correct
>> filename if warnings are generated during a re-read of the pragmas after
>> having preprocessed the file?
>>
>> Full investigation notes are here (rambling and unedited):
>> https://gist.github.com/AlainODea/98141991849093285c52
>>
>>
>> _______________________________________________
>> ghc-devs mailing list
>> ghc-devs at haskell.org
>> http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs
>>
>
> _______________________________________________
> ghc-devs mailing list
> ghc-devs at haskell.org
> http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs
>