[MacPorts] #65100: weechat @3.5_0+ruby: error: invalid arch name '-arch -lx86_64'

[MacPorts]

#65100: weechat @3.5_0+ruby: error: invalid arch name '-arch -lx86_64'
---------------------------+----------------------
  Reporter:  hexadecagram  |      Owner:  cardi
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.7.2
Resolution:                |   Keywords:
      Port:  weechat       |
---------------------------+----------------------

Comment (by cardi):

 Replying to [comment:4 cardi]:
 > Re: the other issues (`-lx86_64` and `-L/usr/local/opt/ruby/lib`), I'll
 have to debug the build to see if I have these issues on my side as well.

 I've been working on a patch to `FindRuby.cmake` to remove the hard-coded
 paths, and I'm now running into the same issue of "invalid arch name",
 except on an `arm64` platform.

 This particular command fails when specifying the `+ruby` variant (added
 linebreaks to make it easier to read):
 {{{
 /usr/bin/clang -pipe -Os -DNDEBUG -I/opt/local/include
 -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX12.sdk
 -fsigned-char -fms-extensions -Wall -Wextra -Werror-implicit-function-
 declaration -arch arm64
 -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX12.sdk -mmacosx-
 version-min=12.0 -bundle
 -Wl,-headerpad_max_install_names -L/opt/local/lib
 -Wl,-headerpad_max_install_names
 -Wl,-syslibroot,/Library/Developer/CommandLineTools/SDKs/MacOSX12.sdk -o
 ruby.so
 "CMakeFiles/ruby.dir/weechat-ruby.c.o" "CMakeFiles/ruby.dir/weechat-ruby-
 api.c.o"
 -L/opt/local/libexec/openssl11/lib -L/opt/local/lib
 -Wl,-headerpad_max_install_names
 -Wl,-syslibroot,/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk -arch
 -larm64
 -Wl,-undefined,dynamic_lookup -Wl,-multiply_defined,suppress -lruby.3.0
 ../libweechat_plugins_scripts.a
 }}}

 What's interesting is that the architecture is correctly specified on the
 second line `-arch arm64`
 but somehow mangled in a repeated invocation on the third line from the
 bottom `-arch -larm64`.

 Poking around in the build directory, the command being executed above is
 in the file
 `src/plugins/ruby/CMakeFiles/ruby.dir/link.txt`.

 I'm not familiar enough with CMake to understand what's creating that
 file, and it isn't obvious to me how all those options are strung together
 (e.g., why are various parameters, like `-L/opt/local/lib` or
 `-Wl,-headerpad_max_install_names` repeated multiple times?).

 Any help in pinpointing where this `-arch -l{arm64,x86_64}` is added would
 be appreciated–I can follow up with adding updated ruby variants after.

-- 
Ticket URL: <https://trac.macports.org/ticket/65100#comment:6>
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