@casparvl Please use SHA256 checksums (EasyBuild discriminates between MD5 & SHA256 based on length, see also http://easybuild.readthedocs.io/en/latest/Writing_easyconfig_files.html#checksums).

@casparvl You can flesh out the LIB_FLAGS part on a separate line as follows:

buildopts = 'CXX="$CXX -std=c++0x" CXXFLAG="$CXXFLAGS" LIB_FILES="" '
buildopts += 'LIB_FLAGS="-lz -lgsl -lmkl -lbz2 -lm -lpthread -lRmath -lhts -lboost_iostreams -lboost_program_options"'

space after # please for readability, and split this across two lines to avoid lines longer than 120 characters

please use 4 spaces for indent, no tabs, and no need to indent the closed ]

this should be the last line (just for consistency compared to existing easyconfigs)

please fix indent and move this up, right below sources block

this should be the last line

use preinstallopts = prebuildopts to avoid repetition

please include a pointer to the documentation

Please make this more specific?

If I do
'files': [('lib/libRmath.a', 'lib64/libRmath.a')]
'files': [('lib/libRmath.so', 'lib64/libRmath.so')]
will that check if libRmath.a and so both exist (they should, with this easyconig), and are either located under lib ór lib64? Or can I not repeat a 'files': several times to do an 'and'?

No, you should use a list with two entries, each a tuple, but you'll need to spread it across two lines to avoid hitting the line length limit (and also, we avoid hardcoding .so, since on MacOS it's .dylib):

sanity_check_paths = {
    'files': [('lib/libRmath.a', 'lib64/libRmath.a'),
              ('lib/libRmath.%s' % SHLIB_EXT, 'lib64/libRmath.%s' % SHLIB_EXT)],
    'dirs': [],
}

style nit-picking: please include an empty line above :)

Please make this more specific, by checking for specific binaries (no need to check all if there are a lot of them).

In this case, I'd use:

sanity_check_paths = {
    'files': ['bin/QTLtools'],
    'dirs': [],
}