restoring macOS compatibility

The code can be compiled with clang on macOS. TABs in FindTBB.cmake have been cleaned.

Some tests of mirrors generate segfaults (on macOS).

44/67 Test #47: mirrors/tests/mparams/loop6.py ............***Exception: SegFault109.68 sec 56/67 Test #53: mirrors/tests/mparams/mparams.py ..........***Exception: SegFault 22.62 sec 65/67 Test #43: mirrors/tests/mparams/loop2.py ............***Exception: SegFault308.35 sec

Other failures should be investigated further:

12/67 Test #12: flow/tests/channel.py .....................***Failed 1.75 sec (problem with my installation of MUMPS on my mac? - works well on Ubuntu) 33/67 Test #27: heat/tests/fe2/heat_mpi.py ................***Failed 9.75 sec

ok bonne idée, on peut merger une autre pull request avant (celui de la batterie); ca fera un exercice github

Created by: kliegeois

What should we do with this PR? Was it included in the last PR that you have submitted @rboman ?

J'ai voulu tester mais mon mac est éteint. En plus, je dois recompiler mumps pour relancer la batterie. Est ce que trilinos marche sur mac/clang? Si oui, je le compilerai avant de merger.

Created by: kliegeois

Yes, Trilinos works on mac with clang providing that you have installed OpenMP for your compiler or that your compiler supports it.

Created by: maartenarnst

I've added a page to the wiki with a writeup of an installation of Trilinos on MacOS Mojave.

thanks @maartenarnst I'll follow your note

This pull request is too old. Moreover the mac build is now completely broken "thanks to" Mojave upgrade...

Thus I need to upgrade cmake, mkl, etc. then I need to understand exactly what has changed in the "new" dylib loading mechanism.