Problem (bug) to upgrade to gnuplot-5.4.8 in Mac M1

[linlupin (linlupin)]

To whom will concern it,

I tried to update the Macports to the latest version 2.8.1 and upgrade the related ports. Unfortunately, I received the following error message:

---
---> Computing dependencies for gnuplot
---> Fetching archive for gnuplot
---> Attempting to fetch gnuplot-5.4.8_0+aquaterm+luaterm+pangocairo+wxwidgets+x11.darwin_20.arm64.tbz2 from ​https://packages.macports.org/gnuplot
---> Attempting to fetch gnuplot-5.4.8_0+aquaterm+luaterm+pangocairo+wxwidgets+x11.darwin_20.arm64.tbz2 from ​http://jog.id.packages.macports.org/macports/packages/gnuplot
---> Attempting to fetch gnuplot-5.4.8_0+aquaterm+luaterm+pangocairo+wxwidgets+x11.darwin_20.arm64.tbz2 from ​http://mirror.fcix.net/macports/packages/gnuplot
---> Building gnuplot
Error: Failed to build gnuplot: command execution failed
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_math_gnuplot/gnuplot/main.log for details.
Error: Follow ​https://guide.macports.org/#project.tickets if you believe there is a bug.
Error: Processing of port gnuplot failed
---

Due to the error of the upgrade, several old installations are also affected. For example, when I operate the "grace", I obtain the following error message: --- dyld: Library not loaded: /opt/local/lib/libXm.4.dylib

Referenced from: /opt/local/bin/xmgrace
Reason: no suitable image found. Did find:

/opt/local/lib/libXm.4.dylib: mach-o, but wrong architecture
/opt/local/lib/libXm.4.dylib: mach-o, but wrong architecture

---

Any good suggestion to fix this bug?

[linlupin (linlupin)]

Error message in the main.log