[MacPorts] #57254: squid3 fails to configure on 10.14

[MacPorts]

#57254: squid3 fails to configure on 10.14
-----------------------+--------------------
 Reporter:  essandess  |      Owner:  (none)
     Type:  defect     |     Status:  new
 Priority:  Normal     |  Milestone:
Component:  ports      |    Version:  2.5.4
 Keywords:             |       Port:  squid3
-----------------------+--------------------
 squid3 fails to configure on 10.14.

 Fresh Macports install, clean `/opt/local` directory:

 {{{
 sudo port selfupdate
 sudo port -puN install squid3
 }}}

 `/opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_net_squid3/squid3/main.l`
 {{{
 :error:configure Failed to configure squid3, consult
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_net_squid3/squid3/work/squid-3.5.28/config.log
 }}}

 `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_net_squid3/squid3/work/squid-3.5.28/config.log`
 {{{
 configure:5040: /usr/bin/clang -V >&5
 clang: error: argument to '-V' is missing (expected 1 value)
 }}}

 This looks like a standard (old) issue with Xcode pointing gcc to
 `/usr/bin/clang`. For example,
 https://stackoverflow.com/questions/20132805/configure-error-with-mac-
 os-x-10-8-5-xcode-5-0-2-clang-error-argument-to-v

 I tried unsuccessfully to install macports `gcc-8` and `clang-7.0` to fix
 this, but ran into similar issues.

-- 
Ticket URL: <https://trac.macports.org/ticket/57254>
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