[WIP] [3/5] support C++20 Modules, add deps-scanner #22429
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
I split the XXL PR #19940 into several small patches.
This is the third patch of Support C++20 Modules, I add
deps-scanner
tool and update toolchainsUsing C++20 Modules means that compilation units must be compiled in topological order. see Discovering Dependencies.
Considering the various compilers, I add the tool
deps-scanner
. The default implementation is a script wrapper that uses different scanning methods depending on the compiler. Here is a demo on how to scan C++20 dependencies. https://github.com/PikachuHyA/cpp20_modules_scan_dependency_demoI also update the toolchain, apply different flags to different actions.