Julia

An easyblock for Julia, which has not configure script.  prebuildopts and buildopts didn't work for me, so this easy block does what the Juila documentation says to do and writes a Make.user file.  I use it with an easyconfig which includes:

configopts = """
USE_SYSTEM_BLAS=1
USE_SYSTEM_LAPACK=1
USE_SYSTEM_FFTW=1
"""

We don't do this with `assert`. Just print a warning with `log.warning`