[MacPorts] #56637: cmake and gobject_introspection portgroups together cause invalid CC archflags

[MacPorts]

#56637: cmake and gobject_introspection portgroups together cause invalid CC
archflags
--------------------+--------------------
 Reporter:  drkp    |      Owner:  (none)
     Type:  defect  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:
 Keywords:          |       Port:
--------------------+--------------------
 As part of updating poppler (see #54808 and https://github.com/macports
 /macports-ports/pull/1975), I've noticed that g-ir-scanner is trying to
 invoke clang with invalid archflags because CC is being set in build.args
 to an invalid argument:

 {{{
 :info:build Command failed:  cd
 "/opt/local/var/macports/build/_opt_local_var_macports_sources_github
 .com_macports-ports_graphics_poppler/poppler/work/poppler-0.65.0" &&
 /usr/bin/make -j8 -w all CC="/usr/bin/clang {-arch x86_64}" VERBOSE=ON
 }}}

 I _think_ this is being caused by an interaction between the cmake-1.1 and
 gobject_introspection-1.0 portgroups, since gobject_introspection-1.0 adds
 the requisite archflags to build.args for g-ir-scanner's use, and the
 cmake portgroup is doing some manipulation of the archflags that I don't
 really understand.

 Note that this isn't a problem for universal builds, except when
 muniversal is used, since gobject_introspection-1.0 doesn't set CC for
 those.

 I've cc'd some of the people involved with the gobject_introspection and
 cmake portgroups since I'm not sure which one the problem is with.

-- 
Ticket URL: <https://trac.macports.org/ticket/56637>
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