[Slackbuilds-users] Surprising failure building GHC

[Erich Ritz]

------- 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