HELP INSTALLATION

[Franck Olivier Ngassam Nyakam]

HELLO SIR 
THANK YOU FOR YOUR RESPONSE THIS HAS HELPED ME. BUT WHEN I ENTER THE COMMAND sudo port install xcrysden +x11 I HAVE THIS MESSAGE Error: Failed to configure gmp, consult /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_gmp/gmp/work/gmp-6.1.2/config.log
Error: Failed to configure gmp: configure failure: command execution failed
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_devel_gmp/gmp/main.log for details.
Error: Follow https://guide.macports.org/#project.tickets to report a bug.
Error: Processing of port xcrysden failed
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