Rebuild for Python 3.7, GCC 7, R 3.5.1, openBLAS 0.3.2

[regro-cf-autotick-bot]

It is likely this feedstock needs to be rebuilt.
Notes and instructions for merging this PR:

1. Please merge the PR only after the tests have passed.
2. Feel free to push to the bot's branch to update this PR if needed.

Please note that if you close this PR we presume that the feedstock has been rebuilt, so if you are going to perform the rebuild yourself don't close this PR until the your rebuild has been merged.

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[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 (recipe) and found some lint.

Here's what I've got...

For recipe:

• The outputs section contained an unexpected subsection name. run_exports is not a valid subsection name.
• The outputs section contained an unexpected subsection name. run_exports is not a valid subsection name.

[scopatz]

I don't understand why we can't find certain packages on the new compilers.

conda.exceptions.ResolvePackageNotFound: 
  - openmp==5.0.0
  - clangdev==5.0.0
  - llvmdev==5.0.0
  - flang-meta

Any ideas @isuruf?

[isuruf]

They are not built yet

[scopatz]

Ahh weird that this was issued at all then

[rth]

we can't find certain packages on the new compilers.

Currently, the only remaining one is openmp in conda-forge/openmp-feedstock#14 .

flang-meta doesn't need to be rebuilt, does it?

[SylvainCorlay]

Ahh weird that this was issued at all then

This was issued because llvmdev and clangdev 7.x were rebuilt

I have run the migration for the 6.x stack. The 5.x stack is still missing clangdev because of a bug in conda-build.

[rth]

The 5.x stack is still missing clangdev because of a bug in conda-build.

Right, conda-forge/clangdev-feedstock#41 thanks for the details!

[h-vetinari]

@conda-forge-admin, please rerender

[h-vetinari]

Seems like compilation runs through, but fails to find crti.o:

[...]
[100%] Linking Fortran static library ../../lib/libflang.a
[100%] Built target flang_static
[100%] Linking Fortran shared library ../../lib/libflang.so
/usr/bin/ld: crti.o: No such file: No such file or directory
clang-5.0: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [lib/libflang.so] Error 1
make[1]: *** [runtime/flang/CMakeFiles/flang_shared.dir/all] Error 2
make: *** [all] Error 2

PS. I became interested in this PR since it's the only open one and flang still depends on llvm=5.0.0, which then makes it impossible to install with more current openmp:

> conda install "openmp>=8" "openblas>=0.3.7"
[...]
Package clangdev conflicts for:
openblas[version='>=0.3.7'] -> libflang[version='>=5.0.0'] -> openmp==5.0.0 -> clangdev[version='5.0.0|5.0.0.*']
Package llvm-meta conflicts for:
openblas[version='>=0.3.7'] -> libflang[version='>=5.0.0'] -> openmp==5.0.0 -> llvm-meta[version='5.0.0|5.0.0.*']
Package llvm-openmp conflicts for:
openmp[version='>=8'] -> llvm-openmp[version='8.0.0|8.0.1',build='h1ad3211_0|h1ad3211_1|h1ad3211_0']
Package openmp conflicts for:
openblas[version='>=0.3.7'] -> libflang[version='>=5.0.0'] -> openmp==5.0.0
openmp[version='>=8']

I also checked the current state of the upstream which hasn't been updated in 1.5yrs, but it seems that things are still slowly progressing.

[h-vetinari]

Closing this one as (very) outdated.