| name | external-deps |
| description | Modify Julia's external dependencies and JLLs — patches under deps/patches/, version bumps in deps/, and JLL updates. Use when touching deps/ or any *_jll folder, including refreshing checksums. |
External dependencies & JLLs
Use this when modifying deps/, dependency patches, or a JLL.
External dependencies (deps/, deps/patches/)
When modifying external dependencies (patches in deps/patches/ or version
updates in deps/):
- Always test builds with
USE_BINARYBUILDER=0 to ensure source builds work correctly.
- For patches to external libraries:
- Verify the patch applies cleanly by running the extraction and patch steps.
- Test the full build of the dependency:
make -C deps USE_BINARYBUILDER=0 compile-<depname>.
- Prefer using the full upstream commit in
git am format (e.g., git format-patch) which includes proper commit metadata.
- When updating dependency versions, ensure all associated patches still apply.
External JLLs
To update a JLL to the latest version:
- Update the version number in the appropriate jll folder.
- If the dependencies in the upstream jll changed, update the
Project.toml.
- Run
make -f contrib/refresh_checksums.mk <jll> to update the checksums. This may take a few minutes.
