GMP 6.2 error

[rodriguez-murias]

Good morning,

I am a PhD student and i am trying to install the GMP library. I run 
everything smoothly until the make install command where the following 
error appears:

When i make install :

/usr/bin/mkdir: cannot create directory ‘/usr/local/share/info’: 
Permission denied
make[3]: *** [Makefile:736: install-info-am] Error 1
make[3]: Leaving directory '/home/murias/Downloads/gmp-6.2.0/doc'
make[2]: *** [Makefile:640: install-am] Error 2
make[2]: Leaving directory '/home/murias/Downloads/gmp-6.2.0/doc'
make[1]: *** [Makefile:995: install-recursive] Error 1
make[1]: Leaving directory '/home/murias/Downloads/gmp-6.2.0'
make: *** [Makefile:1295: install] Error 2

How do i fix it? Without the gmp.h file i cannot proceed

Regards,
Javier