microsoft / microsoft/DirectXShaderCompiler
Support -M depfile generation flags during -P preprocess to file
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bug
high-impact
- Dominant language
- C++
- Stars
- 3.7k
- Forks
- 900
- Avg merge
- 2d 11h
- Merged PRs (30d)
- 44
Description
We're using the -M flag as covered here, but out build process also involves running DXC with the -P flag to preprocess the file.
It'd be great if the -MD and -MF flags were supported when running DXC in -P preprocess only mode.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by tracing DXC's command-line handling for -P preprocess-only mode and the existing -M dependency flags described in issue 2063. Verify how -MD and -MF should behave in this mode, then add coverage showing that preprocess-to-file supports depfile generation and confirm the command-line behavior.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- compilers
- Issue type
- Feature
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100