Question on building self-contained wheels

[tonichedgehog]

Hi, is building a standalone wheel a supported feature, or something that is reserved for CI builds? It would be a very appreciated feature to have, but when I try

STANDALONE_WHEELS=1 pip wheel --no-deps .

the wheel build succeeds, but attempting to use it fails with:

tonic@funbox:~/src/cyclonedds-python/ex$ python -c 'from cyclonedds.tools.wheel_idlc import command; command()' -l py asdf.idl
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/tonic/src/cyclonedds-python/ex/cyclonedds/__init__.py", line 13, in <module>
    from . import internal, util, qos, core, domain, topic, pub, sub, builtin, dynamic, idl
  File "/home/tonic/src/cyclonedds-python/ex/cyclonedds/internal.py", line 25, in <module>
    from .__library__ import library_path, in_wheel
  File "/home/tonic/src/cyclonedds-python/ex/cyclonedds/__library__.py", line 21, in <module>
    library_path = list((dir / ".." / "cyclonedds.libs").glob("libddsc*"))[0]
                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^
IndexError: list index out of range

Looking closer at the built .whl, there is no cyclonedds.libs directory, but there is one named .libs. Am I perhaps using the wrong tools here? Inside the packaged .libs directory there is an idlc executable, but just not as self-contained as I had hoped, the dependencies don't match what is packaged:

tonic@funbox:~/src/cyclonedds-python/ex$ ls -l cyclonedds/.libs/
total 7844
-rwxr-xr-x 1 tonic tonic  515800 Feb  4 19:48 idlc
-rw-r--r-- 1 tonic tonic 7513896 Feb  4 19:48 libddsc.so

tonic@funbox:~/src/cyclonedds-python/ex$ ldd cyclonedds/.libs/idlc 
        linux-vdso.so.1 (0x00007ffe62b71000)
        libgtk3-nocsd.so.0 => /usr/lib/x86_64-linux-gnu/libgtk3-nocsd.so.0 (0x00007f8cac1e9000)
        libcycloneddsidl.so.0 => /home/tonic/local/lib/libcycloneddsidl.so.0 (0x00007f8cac1b8000)
        libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f8cabfd7000)
        libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f8cabfd2000)
        libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f8cabfcb000)
        libddsc.so.0 => /home/tonic/local/lib/libddsc.so.0 (0x00007f8cabe7b000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f8cac29b000)
        libssl.so.3 => /usr/lib/x86_64-linux-gnu/libssl.so.3 (0x00007f8cabdd2000)
        libcrypto.so.3 => /usr/lib/x86_64-linux-gnu/libcrypto.so.3 (0x00007f8cab800000)

Shouldn't libcycloneddsidl.so.0 also be packaged with the wheel along idlc? Also, the packaged libddsc.so seems to have wrong name, the linker looks for a libddsc.so.0.

Tested under Linux, x86_64, python 3.11.2 with a somewhat recent CycloneDDS master.