[MacPorts] #70480: brlaser fails to build with gcc, because it does not understand -weak_framework passed directly (-Wl, -weak_framework works fine)

[MacPorts]

#70480: brlaser fails to build with gcc, because it does not understand
-weak_framework passed directly (-Wl,-weak_framework works fine)
-----------------------------------------+---------------------
 Reporter:  barracuda156                 |      Owner:  (none)
     Type:  defect                       |     Status:  new
 Priority:  Normal                       |  Milestone:
Component:  ports                        |    Version:  2.9.3
 Keywords:  tiger, leopard, snowleopard  |       Port:  brlaser
-----------------------------------------+---------------------
 https://github.com/pdewacht/brlaser/issues/214

 Maybe Xcode gcc could take this, but the port requires C++11 now, so a
 newer gcc is used. And it fails:
 {{{
 [ 80%] Linking CXX executable rastertobrlaser
 /opt/local/bin/cmake -E cmake_link_script
 CMakeFiles/rastertobrlaser.dir/link.txt --verbose=ON
 /opt/local/bin/g++-mp-14  -Wall -Wno-missing-braces -Wformat
 -D_FORTIFY_SOURCE=2 -pipe -Os -DNDEBUG -I/opt/local/include
 -D_GLIBCXX_USE_CXX11_ABI=0 -arch ppc -mmacosx-version-min=10.6
 -Wl,-search_paths_first -Wl,-headerpad_max_install_names -L/opt/local/lib
 -Wl,-headerpad_max_install_names
 CMakeFiles/rastertobrlaser.dir/src/main.cc.o
 CMakeFiles/rastertobrlaser.dir/src/job.cc.o
 CMakeFiles/rastertobrlaser.dir/src/line.cc.o
 CMakeFiles/rastertobrlaser.dir/src/debug.cc.o -o rastertobrlaser
 -Wl,-rpath,/opt/local/lib -lcupsimage -lcups -weak_framework Kerberos
 -framework CoreFoundation -framework Security -lz -lpthread -lresolv
 -framework SystemConfiguration -framework CoreFoundation
 g++-mp-14: error: unrecognized command-line option '-weak_framework'; did
 you mean '-framework'?
 make[2]: *** [rastertobrlaser] Error 1
 }}}

 Flags originate from `cups-config`:
 {{{
 36-25% cups-config --image --libs
 -lcupsimage -lcups -weak_framework Kerberos -framework CoreFoundation
 -framework Security -lz -lpthread -lresolv -framework SystemConfiguration
 -framework CoreFoundation
 }}}

 They are not set directly by the port itself. How to fix it neatly?

 This works:
 ```
 if { ${os.platform} eq "darwin" && ${os.major} < 11 } {
     configure.args-append \
                 -DCUPS_LIBS="-lcupsimage -lcups -Wl,-weak_framework
 Kerberos -framework CoreFoundation -framework Security -lz -lpthread
 -lresolv -framework SystemConfiguration -framework CoreFoundation"
 }
 ```
 But perhaps can be done in a better way?

-- 
Ticket URL: <https://trac.macports.org/ticket/70480>
MacPorts <https://www.macports.org/>
Ports system for macOS