[Slackbuilds-users] Surprising failure building GHC

[Luveh Keraph]

After getting Sage out of the way, and installing Sphinx for good measure,
ghc still refuses to build:

echo 'export
LD_LIBRARY_PATH="/tmp/SBo/ghc-8.10.4/libraries/process/dist-install/build:/tmp/SBo/ghc-8.10.4/libraries/directory/dist-install/build:/tmp/SBo/ghc-8.10.4/libraries/unix/dist-install/build:/tmp/SBo/ghc-8.10.4/libraries/time/dist-install/build:/tmp/SBo/ghc-8.10.4/libraries/filepath/dist-install/build:/tmp/SBo/ghc-8.10.4/libraries/bytestring/dist-install/build:/tmp/SBo/ghc-8.10.4/libraries/deepseq/dist-install/build:/tmp/SBo/ghc-8.10.4/libraries/array/dist-install/build:/tmp/SBo/ghc-8.10.4/libraries/base/dist-install/build:/tmp/SBo/ghc-8.10.4/libraries/integer-gmp/dist-install/build:/tmp/SBo/ghc-8.10.4/libraries/ghc-prim/dist-install/build:/tmp/SBo/ghc-8.10.4/rts/dist/build${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}"'
>> inplace/bin/runghc
cat utils/runghc/runghc.wrapper                                     >>
inplace/bin/runghc
chmod +x
inplace/bin/runghc
/usr/bin/sphinx-build -b html -d docs/users_guide/.doctrees-html -w
docs/users_guide/.log -n -D latex_paper_size=letter docs/users_guide
docs/users_guide/build-html/users_guide
Running Sphinx v4.2.0

Configuration error:
There is a syntax error in your configuration file: (unicode error)
'unicodeescape' codec can't decode bytes in position 1-2: truncated \uXXXX
escape (conf.py, line 110)

make[1]: *** [docs/users_guide/ghc.mk:16:
docs/users_guide/build-html/users_guide/index.html] Error 2
make: *** [Makefile:128: all] Error 2

On Thu, Mar 17, 2022 at 5:38 PM Luveh Keraph <1.41421 at gmail.com> wrote:

> It's because of the following that the issue arises:
>
> 1. Sphinx is an optional requirement for ghc, which is why I did not
> install it.
> 2. I had Sage already installed. The Sage installer adds
> /opt/SageMath/local/bin to the root PATH environment variable.
> 3. Because of this, the ghc build code finds a Sphinx utility that it
> needs in the wrong place.
>
>
> On Thu, Mar 17, 2022 at 3:32 PM Erich Ritz via SlackBuilds-users <
> slackbuilds-users at slackbuilds.org> wrote:
>
>> ------- Original Message -------
>>
>> On Thursday, March 17th, 2022 at 2:52 PM, Luveh Keraph <1.41421 at gmail.com>
>> wrote:
>>
>> > In the process of building the Haskell compiler ghc I came across the
>> following failure:
>> >
>> > echo 'ghcprog="ghc-stage2"' >> "inplace/bin/runghc"
>> >
>> > echo 'export
>> LD_LIBRARY_PATH="/tmp/SBo/ghc-8.10.4/libraries/process/dist-install/build:/tmp/SBo/ghc-8.10.4/libraries/directory/dist-install/build:/tmp/SBo/ghc-8.10.4/libraries/unix/dist-install/build:/tmp/SBo/ghc-8.10.4/libraries/time/dist-install/build:/tmp/SBo/ghc-8.10.4/libraries/filepath/dist-install/build:/tmp/SBo/ghc-8.10.4/libraries/bytestring/dist-install/build:/tmp/SBo/ghc-8.10.4/libraries/deepseq/dist-install/build:/tmp/SBo/ghc-8.10.4/libraries/array/dist-install/build:/tmp/SBo/ghc-8.10.4/libraries/base/dist-install/build:/tmp/SBo/ghc-8.10.4/libraries/integer-gmp/dist-install/build:/tmp/SBo/ghc-8.10.4/libraries/ghc-prim/dist-install/build:/tmp/SBo/ghc-8.10.4/rts/dist/build${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}"'
>> >> inplace/bin/runghc
>> >
>> > cat utils/runghc/runghc.wrapper >> inplace/bin/runghc
>> >
>> > chmod +x inplace/bin/runghc
>> >
>> > /opt/SageMath/local/bin/sphinx-build -b html -d
>> docs/users_guide/.doctrees-html -w docs/users_guide/.log -n -D
>> latex_paper_size=letter docs/users_guide
>> docs/users_guide/build-html/users_guide
>> >
>> > Running Sphinx v4.0.1
>> >
>> > Configuration error:
>> >
>> > There is a syntax error in your configuration file: (unicode error)
>> 'unicodeescape' codec can't decode bytes in position 1-2: truncated \uXXXX
>> escape (conf.py, line 110)
>> >
>> > make[1]: *** [docs/users_guide/ghc.mk:16:
>> docs/users_guide/build-html/users_guide/index.html] Error 2
>> >
>> > make: *** [Makefile:128: all] Error 2
>> >
>> > What has Sage got to do with ghc? It is most certainly not a
>> prerequisite. Why is a Sage utility being invoked here at all, and
>> resulting in an error to boot?
>>
>> From ghc's README:
>>
>> Optional dependency: Sphinx (for building the documentation).
>>
>>
>>
>> It's finding Sphinx in /opt/SageMath/local/bin - which means you aren't
>> building in a clean environment.  Also note Sphinx on SBo is 4.2.0, but
>> yours is 4.0.1.
>>
>> Try cleansing your PATH environment variable at the very least and try
>> building again.
>>
>> Erich
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