pure-octave: clang: error: invalid argument '-bundle' not allowed with '-dynamiclib'

[ryandesign]

pure-octave 0.13 is failing to build in MacPorts at the moment, at least with octave 7.3.0 and pure 0.68 on macOS 12.3.1 and macOS 13.0.1, both on x86_64; here is a log from the latter:

https://build.macports.org/builders/ports-13_x86_64-builder/builds/18585/steps/install-port/logs/stdio

rm -f embed.o
mkoctfile -v -DOCTAVE_MAJOR=7 -DOCTAVE_MINOR=3 -o embed.o -c embed.cc
/usr/bin/clang++ -std=gnu++11 -c -I/opt/local/include -fPIC -I/opt/local/include/octave-7.3.0/octave/.. -I/opt/local/include/octave-7.3.0/octave -I/opt/local/include  -pthread -Os -stdlib=libc++ -arch x86_64    -DOCTAVE_MAJOR=7 -DOCTAVE_MINOR=3 embed.cc -o embed.o
mkoctfile: warning: LFLAGS is deprecated and will be removed in a future version of Octave, use LDFLAGS instead
mkoctfile: unknown variable 'RLD_FLAG'
rm -f octave_embed.dylib
/usr/bin/clang++ -std=gnu++11 -dynamiclib -install_name "/opt/local/lib/pure/octave_embed.dylib" -o octave_embed.dylib embed.o -L/opt/local/lib/octave/7.3.0 -L/opt/local/lib -bundle -undefined dynamic_lookup -bind_at_load -bundle_loader /opt/local/bin/octave-7.3.0 -loctinterp -loctave  -L/opt/local/lib/octave/7.3.0 -L/opt/local/lib -bundle -undefined dynamic_lookup -bind_at_load -bundle_loader /opt/local/bin/octave-7.3.0 -lpure 
clang: error: invalid argument '-bundle' not allowed with '-dynamiclib'
make: *** [octave_embed.dylib] Error 1

Indeed, you only want to use one of -bundle—which the comments in the pure-octave Makefile say you do not want:

# OS X quirk: mkoctfile wants to create a bundle, but we want just a
# dylib which can be linked into other modules.

—or -dynamiclib. The flags are coming from mkoctfile commands that the pure-octave Makefile is running:

• -bundle is coming from:

  % mkoctfile -p LFLAGS
  mkoctfile: warning: LFLAGS is deprecated and will be removed in a future version of Octave, use LDFLAGS instead
  -L/opt/local/lib/octave/7.3.0 -L/opt/local/lib -bundle -undefined dynamic_lookup -bind_at_load -bundle_loader /opt/local/bin/octave-7.3.0

• -dynamiclib is coming from:

  % pkg-config pure --variable shared   
  -dynamiclib