--with-cuda failes to find libcuda.so

[BKitor]

OpenMPI can fail to find libcuda.so and will build without opal acclerator cuda when --with-cuda/--with-cuda-libdir is specified.
This was already reported as a bug in #12264 and fixed in #12382, but the bug persists.
I noticed in with a v5.0.3 tarball, and have been able to reproduce on master.

Details of the problem

user@bigtwin1d:~/bkitor/bk_share/ompi_builds/ompi[master]$ ./build/bin/ompi_info | grep 'Configure command'
  Configure command line: '--prefix=/home/user/bkitor/bk_share/ompi_builds/ompi/build' '--with-cuda=/usr/local/cuda' '--with-ofi=/usr/local'
user@bigtwin1d:~/bkitor/bk_share/ompi_builds/ompi[master]$ ./build/bin/ompi_info | grep 'MCA accelerator'
         MCA accelerator: null (MCA v2.1.0, API v1.0.0, Component v5.1.0)

user@bigtwin1d:~/bkitor/bk_share/ompi_builds/ompi[master]$ ./build/bin/ompi_info | grep 'Configure command'
  Configure command line: '--prefix=/home/user/bkitor/bk_share/ompi_builds/ompi/build' '--with-cuda=/usr/local/cuda' '--with-cuda-libdir=/usr/local/cuda' '--with-ofi=/usr/local'
user@bigtwin1d:~/bkitor/bk_share/ompi_builds/ompi[master]$ ./build/bin/ompi_info | grep 'MCA accelerator'
         MCA accelerator: null (MCA v2.1.0, API v1.0.0, Component v5.1.0)

The crux of the issue is that /usr/local/cuda is a symlink, and the find command in opal_check_cuda.m4 won't follow it by default.
Adding the -H flag should fix the issue.

[jsquyres]

This is a different issue than was reported by #12264, but still falls under the same end-visible symptom of not being able to find the CUDA libraries.

Thanks for reporting, and thanks for submitting the PR!

[janjust]

fixed with #12510

[jsquyres]

@janjust Do you want to wait until this is fixed in v5.0.x?

[janjust]

#12513 I have the cherry-pick up already