Macports2.4.1でncviewがインストールできない問題

MacPortsを2.4.1にバージョンアップしたら、ncviewとnclが動かなくなって、nclは入れ直すだけで何とかなったけど、ncviewは動かない。
検索してもなかなか出てこない。
twitterで
Yoichi Kawamotoさんのツイート: "MacPortsのudunitsが2.2.24_2にアップデートされてncarg (ncl) のインストールの問題も無事解決。ncviewはlibudunits2.aが見付からない... https://twitter.com/you_ichi/status/835719313281568770

そんなのどこに書いてあるんだろうと

\$ sudo port install ncview
Password:
---> Computing dependencies for ncview
---> Configuring ncview
Error: Failed to configure ncview, consult /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_science_ncview/ncview/work/ncview-2.1.1/config.log
Error: Failed to configure ncview: configure failure: command execution failed
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_science_ncview/ncview/main.log for details. ←これだ
Error: Follow https://guide.macports.org/#project.tickets to report a bug.
Error: Processing of port ncview failed

ということで

\$ tail /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_science_ncview/ncview/main.log

***********************************************************************************************

:info:configure checking for /opt/local/lib/libudunits2.a... no

:info:configure Error: user specified udunits2 library directory does not have libudunits2.a ! ←これだ

:info:configure Command failed: cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_science_ncview/ncview/work/ncview-2.1.1" && ./configure --prefix=/opt/local --with-netcdf_incdir=/opt/local/include --with-netcdf_libdir=/opt/local/lib --with-bindir=/opt/local/bin --with-udunits2_incdir=/opt/local/include/udunits2 --with-udunits2_libdir=/opt/local/lib --with-png_incdir=/opt/local/include --with-png_libdir=/opt/local/lib --with-x
:info:configure Exit code: 255
:error:configure Failed to configure ncview, consult /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_science_ncview/ncview/work/ncview-2.1.1/config.log
:error:configure Failed to configure ncview: configure failure: command execution failed
:debug:configure Error code: NONE
:debug:configure Backtrace: configure failure: command execution failed
:debug:configure while executing
:debug:configure "$procedure $targetname"
:error:configure See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_science_ncview/ncview/main.log for details.

***********************************************************************************************

ホントだ。

つぶやきどおりリンクをはってみよう。

\$ sudo ln -sf /opt/local/lib/libudunits2.dylib /opt/local/lib/libudunits2.a
\$ sudo port install ncview
---> Computing dependencies for ncview
---> Configuring ncview
---> Building ncview
---> Staging ncview into destroot
---> Installing ncview @2.1.1_11
---> Activating ncview @2.1.1_11
---> Cleaning ncview
---> Updating database of binaries
---> Scanning binaries for linking errors
---> No broken files found.

できた！

結構苦労してしまった。ちゃんとログは見ましょう。