Stop empty source files `""` from being exported to json.
Move source path fixing to a separate function.
`ContentListing::to_json` now takes the source root, recursively calling the source path fixup function on all source paths in the content listing.
Make explicit the location for the `CMakeUserPresets.json` file.
Update docs tests documentation.
Move `BUILD_DIR` and `PROGRAM_PREFIX` comments into the functional tests todo.
Add cmake to MacPorts/FreeBSD install instructions.
Add ccache to example `CMakeUserPresets.json` (it isn't otherwise documented, and is no longer as obvious without an `ENABLE_CCACHE` makevar).
Addressing comments
The CMake refactor changes relative paths to absolute when calling `source_location::current()`. Use the path to `register.cc` to find the root yosys dir, and use that as the base for other paths.
Includes provisions for when plugins have a valid location; if it's not in the yosys source tree we shouldn't try to make the path relative, and we shouldn't try to auto group by path (since such groups will never be allocated, leaving them as unknown is preferable).
Limited to non wasm (I think that's the only one where we can't (easily) use `<filesystem>`). But where we do use `<filesystem>` we can also simplify the auto group to use `fs::path::parent_path()`.
This commit reimplements the (no longer recommended) setuptools based
build system using a standards-based in-tree PEP517 build backend.
The implementation is partially based on
https://codeberg.org/ziglang/zig-pypi/src/branch/main/make_wheels.py
which is licensed under BSD-0-clause.
It also adds a new option `YOSYS_BUILD_PYTHON_ONLY` that is available
only if the binary or the library aren't going to be installed, which
turns off these targets entirely, as well as some dependent ones
(e.g. tests).
Co-authored-by: Mohamed Gaber <me@donn.website>
