[MacPorts] #60054: ncarg @6.6.2_2: regression, library not found for -lgomp

[MacPorts]

#60054: ncarg @6.6.2_2: regression, library not found for -lgomp
--------------------------+----------------------
 Reporter:  Dave-Allured  |      Owner:  tenomoto
     Type:  defect        |     Status:  assigned
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:
 Keywords:                |       Port:  ncarg
--------------------------+----------------------
 As of 2020 Feb 6, the default variant of **ncarg** fails to build from
 source under at least some conditions.  A regresson in Portfile @6.6.2_2,
 last modified January 17, seems likely.  Compile goes well, then breaks
 when linking the main executable **"ncl"**.

 * Mac OS 10.14.6, Mojave
 * Xcode 11.3
 * Macports 2.6.2
 * **Using custom prefix in user home, not /opt/local.**

 Command history, simplified:
 {{{
 port install gcc9
 port install hdf5 +gcc9
 port install ncarg
 }}}
 Main.log, lines 46904-46907:
 {{{
 :info:build ld: warning: directory not found for option
 '-L/Volumes/User/dallured/port/262/var/macports/build/_Volumes_User_dallured_port_262_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_science_ncarg/ncarg/work/destroot/Users/dallured/port/262/lib'
 :info:build ld: library not found for -lgomp
 :info:build clang: error: linker command failed with exit code 1 (use -v
 to see invocation)
 :info:build make[4]: *** [ncl] Error 1
 }}}

 This commit of January 17 [https://github.com/macports/macports-
 ports/commit/b63f838f39ee45178d3ffcbbbd36050e8e7f436c] seems to be the
 problem.

 Reverting to the previous portfile version of January 6
 [https://github.com/macports/macports-
 ports/blob/86f87e9d7727ee70b7e35a91d940104640580740/science/ncarg/Portfile]
 builds correctly.

-- 
Ticket URL: <https://trac.macports.org/ticket/60054>
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