Add `NO_LAPACKE` option to Cmake build

[brunvonlope]

On the old-style build it's possible to disable Lapacke with NO_LAPACKE=1 but there is no such option on the Cmake build. I would like to disable it since I don't use it when building OpenBLAS for GIMP.

I observed that the output of the Cmake build it is the double of the old-style build (not sure if this is due to lapacke or just the verbosity which is different)

[martin-frbg]

I think setting -DNO_LAPACKE=1 is supported, although it is not properly exposed as an option currently, did you try ?

[brunvonlope]

Tested I can confirm that lapacke headers are not installed with that option enabled so it works.

Off topic: there are plans to make Cmake the only build system of the project?

[martin-frbg]

no plans (that I know of, at least) to make anything the only build system, and GNU make is certainly better supported as build system for OpenBLAS right now than CMake (which is still labeled as experimental) - it is simply that CMake support was added later and (imperfectly) modeled after the Makefiles.