I can't install Xcrysden on my Mac

[PanzhangZP]

(base) PandeMacBook-Pro:~ pan$ sudo port install xcrysden
--->  Computing dependencies for xcrysden
The following dependencies will be installed:  gcc9
Continue? [Y/n]: Y
--->  Fetching archive for gcc9
--->  Attempting to fetch gcc9-9.1.0_2.darwin_18.x86_64.tbz2 from https://pek.cn.packages.macports.org/macports/packages/gcc9
--->  Attempting to fetch gcc9-9.1.0_2.darwin_18.x86_64.tbz2.rmd160 from https://pek.cn.packages.macports.org/macports/packages/gcc9
--->  Installing gcc9 @9.1.0_2
--->  Activating gcc9 @9.1.0_2
--->  Cleaning gcc9
--->  Building xcrysden
Error: Failed to build xcrysden: command execution failed
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_science_xcrysden/xcrysden/main.log for details.
Error: Follow https://guide.macports.org/#project.tickets to report a bug.
Error: Processing of port xcrysden failed

[PanzhangZP]

My system is "macOS Mojave 10.14.5".

[mf2k (Frank Schima)]

The Priority field is for use by Macports team members only, please do not set it.

[mf2k (Frank Schima)]

In the future, please use WikiFormatting, fill in the Port field and add the port maintainer(s) to Cc (port info --maintainers xcrysden), if any.