Find{BLAS,LAPACK}: Improve automatic testing of these modules
These modules are widely used but poorly tested.
The Tests/CMakeLists.txt
file contains many tests for find modules that are activated by CMake_TEST_Find*
variables that can be added to the cache of builds on CI machines known to have the needed packages. For each such test there is a Tests/Find*/
directory with a test project that finds the corresponding package and builds a small test program using the actual APIs from the package.
We should add such tests for FindBLAS and FindLAPACK.