build error with gmp 6.1.2 when path contains whitespace (on Mac OS 10.9.5)

[Marc Glisse]

On Mon, 23 Jul 2018, zfefm at gmx.de wrote:

> I use gmp 6.1.2 on Mac OS 10.9.5. When the path to the build directory
> contains a whitespace make eventually fails:

See https://gmplib.org/list-archives/gmp-bugs/2015-November/003773.html 
for instance for a previous discussion on the subject.

-- 
Marc Glisse