py38-matplotlib @3.3.3 does not build on PPC Leopard, Mac OS X 10.5.8, because of "cc1obj: error: -Werror=unguarded-availability: No option -Wunguarded-availability"

[ballapete (Peter "Pete" Dyballa)]

/usr/bin/g++-4.2 -bundle -undefined dynamic_lookup -L/opt/local/lib -Wl,-headerpad_max_install_names -arch ppc -arch ppc -isysroot/ build/temp.macosx-10.5-ppc-3.8/src/_ttconv.o build/temp.macosx-10.5-ppc-3.8/extern/ttconv/pprdrv_tt.o build/temp.macosx-10.5-ppc-3.8/extern/ttconv/pprdrv_tt2.o build/temp.macosx-10.5-ppc-3.8/extern/ttconv/ttutil.o -o build/lib.macosx-10.5-ppc-3.8/matplotlib/_ttconv.cpython-38-darwin.so
building 'matplotlib.backends._macosx' extension
/usr/bin/gcc-4.2 -fno-strict-aliasing -Wsign-compare -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -pipe -Os -arch ppc -isysroot/ -I/opt/local/Library/Frameworks/Python.framework/Versions/3.8/include/python3.8 -c src/_macosx.m -o build/temp.macosx-10.5-ppc-3.8/src/_macosx.o -Werror=unguarded-availability -fvisibility=hidden
cc1obj: error: -Werror=unguarded-availability: No option -Wunguarded-availability
error: command '/usr/bin/gcc-4.2' failed with exit status 1
Command failed:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_nue.de.rsync.macports.org_macports_release_tarballs_ports_python_py-matplotlib/py38-matplotlib/work/matplotlib-3.3.3" && /opt/local/Library/Frameworks/Python.framework/Versions/3.8/bin/python3.8 setup.py --no-user-cfg build 
Exit code: 1
Error: Failed to build py38-matplotlib: command execution failed

[ballapete (Peter "Pete" Dyballa)]

trac.macports.org does not accept uploading files, at least not from me and TenFourFox Feature Parity Release 29. The cause for the failure seems to be here:

./setupext.py:677:        ext.extra_compile_args.extend(['-Werror=unguarded-availability'])

[ballapete (Peter "Pete" Dyballa)]

Main.log from PPC Leopard

[ballapete (Peter "Pete" Dyballa)]

Main.log from PPC Leopard from after patching setupext.py

[ballapete (Peter "Pete" Dyballa)]

A new failure comes up that might not be resolvable on elder systems:

/usr/bin/g++-4.2 -bundle -undefined dynamic_lookup -L/opt/local/lib -Wl,-headerpad_max_install_names -arch ppc -arch ppc -isysroot/ build/temp.macosx-10.5-ppc-3.8/src/_ttconv.o build/temp.macosx-10.5-ppc-3.8/extern/ttconv/pprdrv_tt.o build/temp.macosx-10.5-ppc-3.8/extern/ttconv/pprdrv_tt2.o build/temp.macosx-10.5-ppc-3.8/extern/ttconv/ttutil.o -o build/lib.macosx-10.5-ppc-3.8/matplotlib/_ttconv.cpython-38-darwin.so
building 'matplotlib.backends._macosx' extension
/usr/bin/gcc-4.2 -fno-strict-aliasing -Wsign-compare -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -pipe -Os -arch ppc -isysroot/ -I/opt/local/Library/Frameworks/Python.framework/Versions/3.8/include/python3.8 -c src/_macosx.m -o build/temp.macosx-10.5-ppc-3.8/src/_macosx.o -fvisibility=hidden
src/_macosx.m:202: error: cannot find protocol declaration for ‘NSWindowDelegate’
src/_macosx.m: In function ‘lazy_init’:
src/_macosx.m:272: error: ‘NSApplicationActivationPolicyRegular’ undeclared (first use in this function)
src/_macosx.m:272: error: (Each undeclared identifier is reported only once
src/_macosx.m:272: error: for each function it appears in.)
src/_macosx.m:272: warning: no ‘-setActivationPolicy:’ method found
src/_macosx.m:272: warning: (Messages without a matching method signature
src/_macosx.m:272: warning: will be assumed to return ‘id’ and accept
src/_macosx.m:272: warning: ‘...’ as arguments.)
src/_macosx.m: In function ‘choose_save_file’:
src/_macosx.m:1345: warning: ‘NSSavePanel’ may not respond to ‘-setNameFieldStringValue:’
error: command '/usr/bin/gcc-4.2' failed with exit status 1
Command failed:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_nue.de.rsync.macports.org_macports_release_tarballs_ports_python_py-matplotlib/py38-matplotlib/work/matplotlib-3.3.3" && /opt/local/Library/Frameworks/Python.framework/Versions/3.8/bin/python3.8 setup.py --no-user-cfg build 
Exit code: 1
Error: Failed to build py38-matplotlib: command execution failed

It might be useful to offer py3?-nltk with and without dependencies… (at least for elder systems)

[kencu (Ken)]

looks like you're getting into some more advanced Apple SDK needs, beyond what Leopard can offer.

Simplest solution is usually to toggle that backend off on failing systems, if possible.

[ballapete (Peter "Pete" Dyballa)]

Replying to kencu:

Simplest solution is usually to toggle that backend off on failing systems, if possible.

Yes, I have to decimate the many dependencies…

[reneeotten (Renee Otten)]

In da3d6ce9e8c8003441aed314f8cf1a87d2a2e99b/macports-ports (master):

py-matplotlib: attempt to fix build on 10.5

Closes: #61757