32cd2ddf8e
Semiwrap / meson / robotpy define `NDEBUG` when building their software in all modes, while `allwplib` only does it when building debug. This causes the size of `DenseMap` to differ between the shared libraries built here, and the extension modules built in `mostrobotpy`, causing segfaults when you try to execute code that uses `DenseMap`. This is not a problem with the robotpy code in `allwpilib`, because bazel uses the exact same compiler flags when building the shared libraries and pybind11 extensions.
Upstream utils
Layout
Each thirdparty library has a Python script for updating it. They generally:
- Check out a thirdparty Git repository to a specific commit or tag
- Apply patch files to the thirdparty repo to fix things specific to our build
- Copy a subset of the thirdparty files into our repo
- Comment out any header includes that were invalidated, if needed
upstream_utils.py contains utilities common to these update scripts.
Patches are generated in the thirdparty repo with git's format-patch command so
they can be applied as individual commits and easily rebased onto newer
versions. Each library has its own patch directory (e.g., lib_patches).
Updating thirdparty library version
The example below will update a hypothetical library called lib to the tag
2.0.
Start in the upstream_utils folder. Make sure a clone of the upstream repo exists.
./<lib>.py clone
Rebase the clone of the upstream repo.
./<lib>.py rebase 2.0
Update the upstream_utils patch files and the tag in the script.
./<lib>.py format-patch
Copy the updated upstream files into the thirdparty files within allwpilib.
./<lib>.py copy-src
Adding patch to thirdparty library
The example below will add a new patch file to a hypothetical library called
lib (Replace <lib> with llvm, fmt, eigen, ... in the following steps).
Start in the upstream_utils folder. Make sure a clone of the upstream repo exists.
./<lib>.py clone
Update the clone of the upstream repo.
./<lib>.py reset
Navigate to the repo. If you can't find it, the directory of the clone is printed at the start of the clone command.
cd /tmp/<lib>
Make a commit with the desired changes.
git add ...
git commit -m "..."
Navigate back to upstream_utils.
cd allwpilib/upstream_utils
Update the upstream_utils patch files.
./<lib>.py format-patch
Rerun <lib>.py to reimport the thirdparty files.
./<lib>.py copy-src