Add "gepetto-viewer" recipe

[ymontmarin]

Checklist

• Title of this PR is meaningful: e.g. "Adding my_nifty_package", not "updated meta.yaml"
• License file is packaged (see here for an example)
• Source is from official source
• Package does not vendor other packages. (If a package uses the source of another package, they should be separate packages or the licenses of all packages need to be packaged)
• If static libraries are linked in, the license of the static library is packaged.
• Build number is 0
• A tarball (url) rather than a repo (e.g. git_url) is used in your recipe (see here for more details)
• GitHub users listed in the maintainer section have posted a comment confirming they are willing to be listed there

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipes/gepetto-viewer) and found it was in an excellent condition.

[ymontmarin]

@conda-forge-admin, please restart ci

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I wanted to let you know that I linted all conda-recipes in your PR (recipes/gepetto-viewer) and found some lint.

Here's what I've got...

For recipes/gepetto-viewer:

• If python is a host requirement, it should be a run requirement.

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipes/gepetto-viewer) and found it was in an excellent condition.

[ymontmarin]

@conda-forge/help-c-cpp

After the decision to focus on gepetto-viewer only in this recipe and after some work done on the X11 and OpenGL dependencies I finally managed to converge to a simple recipe that succeed to build Linux package.

However, after trying few workarounds, I cant manage to get it done for osx. I got the error:

/Users/runner/miniforge3/conda-bld/gepetto-viewer_1602451873289/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_plac/include/X11/Xlib.h:1686:1: error: unknown type name '_X_DEPRECATED'

during compilation. From what I found, the most similar error was in recipe discussion: conda-forge/ambertools-feedstock#18 which was also about a gui on MacOs. It seems related to the issue conda-forge/tk-feedstock#15 about interference between tk and X11 with tk overiding some X11 headers with incomplete ones.

I am not familiar with those kind of issue and already tried different fixes. Could you please help and advice on this issue ?

[ymontmarin]

ping @jcarpent : update on recipe situation.

Do you accept to also be a maintainer ?

[jcarpent]

Fine to be considered as a maintener

[ymontmarin]

@conda-forge/help-c-cpp

Workaround found

After digging on a MacOS VM the behaviour of tk and X11 and how they install conflict headers, and all the conda-forge threads about this interaction, the cleanest warkaround i found is to alias the X11 of root include (which is corrupt by the tk installation which is required) to let the compiler use the host include folder X11 which is not corrupted. I restore the aliasing after compilation to respect folder structure for conda-build.

Next step

I think this PR is then ready to merge, @conda-forge/help-c-cpp

[ymontmarin]

@conda-forge/help-c-cpp could it be possible to review the PR ? Recipe looks finish, checklist is done and CI is ok. Thanks !

[ymontmarin]

@conda-forge/help-c-cpp , I squashed and rebase the PR branch to make it more readable for review.
I think the PR is ready for merge. Could it be possible to review the PR ? Thank you !

[jcarpent]

@conda-forge/help-c-cpp We would need this package to be inside conda-forge before adding additional packages. Would you have time to review this PR and merge it?
Thanks in advance,
Best,

Justin

[jcarpent]

@wolfv Sorry to directly ask you this, but we would need this PR to be merged, but we do not have any feedback from the maintainers. I guess they are all occupied, but if you have the rights, would you have time to handle this PR?
Thanks in advance for your help.

[jcarpent]

@conda-forge-admin, please ping team

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-webservice.

I was asked to ping @conda-forge/staged-recipes and so here I am doing that.

[wolfv]

thanks for the contribution!

[ymontmarin]

@wolfv Thank you for the merge !

[jcarpent]

Thanks @wolfv for the quick merge.

[wolfv]

btw @ymontmarin not sure if you deliberately chose gnu++11 vs c++11. Also the conda-forge default is C++17 on OS X and Linux. So that line might not be totally necessary.

[ymontmarin]

@wolfv you are right ! I change it on the feedstock.