Hi Devs,
I am building from source and had a few questions.


MAX_JOBS env var doesn’t seem to have any effect on parallel compile.  htop shows activity on <10% of cores throughout build process.


I am using following command to inject “-O3” flag in setup.py 4 parameters.  (My objective is to unroll and vectorize loops for a 64-core/256HT CPU.)



sed -i ‘s/’-Wno-write-strings’/’-Wno-write-strings’ , ‘-O3’/’ setup.py 4

Is there an environment variable I can use to specify optimization flags?  I can submit a pull request to add such a flag if you’d like because sed method is brittle.

MKL libraries are in conda3/pkgs/mkl-2018.0.0-hb491cac_4/lib/ folder, but not being detected during build.  Does MKL detection rely on CMAKE_LIBRARY_PATH env var, or something else?

Thanks!