Can not be compiled under mac os

[xpbtmusic]

Hi Floens,Can not be compiled under mac os:
make: Nothing to be done for `all'.
gmkdir: cannot create directory ‘/lib’: Permission denied
gmkdir: cannot create directory ‘/lib’: Permission denied
gmkdir: cannot create directory ‘/include’: Permission denied
gmkdir: cannot create directory ‘/share’: Permission denied
gmkdir: cannot create directory ‘/share’: Permission denied

[floens]

The project currently only compiles on Linux, macOS support is planned.