Port to libsysprof-capture-4.a
Trivial port from v3 to v4 of libsysprof-capture. See sysprof!30 (comment 857673).
Compile-tested and tested with
meson test, but nothing further than that.
Once sysprof!31 (merged) lands, it should be possible to add a subproject
.wrap file for sysprof so it can be built in-tree if not available on the system as a
.pc file. (I don’t plan to do that, though.)