Trying to install gnuradio, gd2 fails to install properly

[k6wx (Kristen McIntyre)]

When trying to install the gnuradio port, it appears to require gd2. gd2 will not install correctly. I completely removed MacPorts, removing all directories and files, but it still fails. It warns about the macOS 11.1 SDK, but that's because i'm running the latest beta of Big Sur: 20C5061b. It should be okay with the installed SDK.

Trying to install gd2 on its own also fails. Uninstalling it and cleaning it before attempting again doesn't fix it.

Warning: The macOS 11.1 SDK does not appear to be installed. Ports may not build correctly.
Warning: You can install it as part of the Xcode Command Line Tools package by running `xcode-select --install'.
--->  Fetching archive for gd2
--->  Attempting to fetch gd2-2.3.0_0+x11.darwin_20.x86_64.tbz2 from https://mse.uk.packages.macports.org/gd2
--->  Attempting to fetch gd2-2.3.0_0+x11.darwin_20.x86_64.tbz2 from https://ywg.ca.packages.macports.org/mirror/macports/packages/gd2
--->  Attempting to fetch gd2-2.3.0_0+x11.darwin_20.x86_64.tbz2 from http://fco.it.packages.macports.org/gd2
--->  Fetching distfiles for gd2
--->  Attempting to fetch libgd-2.3.0.tar.xz from https://github.com/libgd/libgd/releases/download/gd-2.3.0
--->  Verifying checksums for gd2                                                    
--->  Extracting gd2
--->  Applying patches to gd2
--->  Configuring gd2
Error: Failed to configure gd2, consult /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_graphics_gd2/gd2/work/libgd-2.3.0/config.log
Error: Failed to configure gd2: configure failure: command execution failed
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_graphics_gd2/gd2/main.log for details.
Error: Follow https://guide.macports.org/#project.tickets to report a bug.
Error: Processing of port gnuradio failed