Improve OpenMP configuration

What is the bug

OpenMP_C is not used and cannot be found with Mac clang, which cause a compile trouble. This MR solves #25 (closed).

How do you fix it

Only find OpenMP and link for Fortran. Along the way, one bug for insert_dimension is also fixed with this MR.

How urgent is the bugfix

• I need it as soon as possible
• I can wait for a couple of days
• None of my current codes is directly affected

Mandatory steps before review

• Gitlab CI passes (Hint: use make format for linting)
• Bugfix is covered by additional unit tests
• Mark the merge request as ready by removing Draft:

Mandatory steps before merge

• Test coverage does not decrease
• Reviewed by a maintainer
• Incorporate review suggestions
• Prior to merging, please remove any boilerplate from the MR description, retaining only the What is the bug and How do you fix it section to maintain
• Remember to edit the commit message and select the proper changelog category (feature/bugfix/other)

You are not supposed to merge this request by yourself, the maintainers of fortan-support take care of this action!

assigned to @b382190

changed the description

added 1 commit

• 8a6cf3a5 - Add GNU OpenMP test

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added 1 commit

• 70c41801 - Add OpenMP CI for all compilers

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added 2 commits

• a072a659 - Fix bug for insert_dimension (only shown when OMP is enabled)
• c8df10ba - Remove OpenMP NAG CI

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added 6 commits

• 316d3dc6 - 1 commit from branch master
• 9929925d - Improve OpenMP configuration
• ed0937bf - Add GNU OpenMP test
• 7f4123fa - Add OpenMP CI for all compilers
• 427174f5 - Fix bug for insert_dimension (only shown when OMP is enabled)
• 489a2566 - Remove OpenMP NAG CI

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marked this merge request as ready

added bug ready for review labels

changed the description

requested review from @b381001

added 2 commits

• 7e94105e - Improve OpenMP configuration
• 0a2d68a9 - Delete impossible if clause

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marked the checklist item Mark the merge request as ready by removing Draft: as completed

marked the checklist item Bugfix is covered by additional unit tests as completed

marked the checklist item Gitlab CI passes (Hint: use make format for linting) as completed

added 1 commit

• 4df2643e - Fix code duplication by rebase

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requested review from @k202170 and removed review request for @b381001

added 1 commit

• ee30980b - Recover irrelevant update

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added 10 commits

• 555fd59f - 1 commit from branch master
• 2aa7caba - Improve OpenMP configuration
• 63903edf - Add GNU OpenMP test
• db4b7f46 - Add OpenMP CI for all compilers
• 4658b288 - Fix bug for insert_dimension (only shown when OMP is enabled)
• 20255353 - Remove OpenMP NAG CI
• eb829538 - Improve OpenMP configuration
• ba63ba88 - Delete impossible if clause
• 765b1020 - Fix code duplication by rebase
• bbd5b08a - Recover irrelevant update

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marked the checklist item Reviewed by a maintainer as completed

marked the checklist item Incorporate review suggestions as completed