[MacPorts] #67491: py-matplotlib fails to build with gcc: cc1obj: error: '-Werror=unguarded-availability': no option '-Wunguarded-availability'

[MacPorts]

#67491: py-matplotlib fails to build with gcc: cc1obj: error: '-Werror=unguarded-
availability': no option '-Wunguarded-availability'
--------------------------+---------------------------
 Reporter:  barracuda156  |      Owner:  (none)
     Type:  defect        |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:  2.8.1
 Keywords:                |       Port:  py-matplotlib
--------------------------+---------------------------
 {{{
 building 'matplotlib.backends._macosx' extension
 creating build/temp.macosx-10.6-ppc-
 cpython-311/matplotlib.backends._macosx
 creating build/temp.macosx-10.6-ppc-
 cpython-311/matplotlib.backends._macosx/src
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports
 .org_macports_release_tarballs_ports_python_py-
 matplotlib/py311-matplotlib/work/compwrap/cc/usr/bin/gcc-4.2 -fno-common
 -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -pipe -Os
 -I/opt/local/Library/Frameworks/Python.framework/Versions/3.11/include/python3.11
 -c src/_macosx.m -o build/temp.macosx-10.6-ppc-
 cpython-311/matplotlib.backends._macosx/src/_macosx.o -Werror=unguarded-
 availability -arch ppc -isysroot/ -fvisibility=hidden
 cc1obj: error: -Werror=unguarded-availability: No option -Wunguarded-
 availability
 error: command
 '/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports
 .org_macports_release_tarballs_ports_python_py-
 matplotlib/py311-matplotlib/work/compwrap/cc/usr/bin/gcc-4.2' failed with
 exit code 1
 }}}

 Both gcc-4.2 and gcc12 fail likewise.

-- 
Ticket URL: <https://trac.macports.org/ticket/67491>
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