[MacPorts] #58442: gcc9 (and other gccN) fails to install on Mojave, Xcode-10.2.1

[MacPorts]

#58442: gcc9 (and other gccN) fails to install on Mojave, Xcode-10.2.1
------------------------+--------------------
 Reporter:  mouse07410  |      Owner:  (none)
     Type:  defect      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:
 Keywords:              |       Port:  gcc9
------------------------+--------------------
 MacOS 10.14.4, Xcode-10.2.1

 {{{
 $ sudo port install gcc9
 Enter PIN for 'Certificate For PIV xxxxxxxxxx':
 --->  Computing dependencies for libgcc
 --->  Fetching archive for libgcc
 --->  Attempting to fetch libgcc-2.0_0.darwin_18.noarch.tbz2 from
 https://packages.macports.org/libgcc
 --->  Attempting to fetch libgcc-2.0_0.darwin_18.noarch.tbz2 from
 http://aus.us.packages.macports.org/macports/packages/libgcc
 --->  Attempting to fetch libgcc-2.0_0.darwin_18.noarch.tbz2 from
 http://fco.it.packages.macports.org/mirrors/macports-packages/libgcc
 --->  Fetching distfiles for libgcc
 --->  Verifying checksums for libgcc
 --->  Extracting libgcc
 --->  Configuring libgcc
 --->  Building libgcc
 --->  Staging libgcc into destroot
 --->  Installing libgcc @2.0_0
 --->  Cleaning libgcc
 --->  Computing dependencies for libgcc
 --->  Deactivating libgcc @1.0_0
 --->  Deactivating libgcc8 @8.3.0_3
 --->  Cleaning libgcc
 --->  Activating libgcc @2.0_0
 --->  Cleaning libgcc
 --->  Computing dependencies for gcc9
 --->  Fetching archive for gcc9
 --->  Attempting to fetch gcc9-9.1.0_1.darwin_18.x86_64.tbz2 from
 https://packages.macports.org/gcc9
 --->  Attempting to fetch gcc9-9.1.0_1.darwin_18.x86_64.tbz2 from
 http://aus.us.packages.macports.org/macports/packages/gcc9
 --->  Attempting to fetch gcc9-9.1.0_1.darwin_18.x86_64.tbz2 from
 http://fco.it.packages.macports.org/mirrors/macports-packages/gcc9
 --->  Fetching distfiles for gcc9
 --->  Attempting to fetch gcc-9.1.0.tar.xz from
 ftp://ftp.funet.fi/pub/mirrors/sources.redhat.com/pub/gcc/releases/gcc-9.1.0/
 --->  Verifying checksums for gcc9
 --->  Extracting gcc9
 --->  Configuring gcc9
 --->  Building gcc9
 Error: Failed to build gcc9: command execution failed
 Error: See
 /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_gcc9/gcc9/main.log
 for details.
 Error: Follow https://guide.macports.org/#project.tickets to report a bug.
 Error: Processing of port gcc9 failed
 $
 }}}

 Complete log attached.

-- 
Ticket URL: <https://trac.macports.org/ticket/58442>
MacPorts <https://www.macports.org/>
Ports system for macOS