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36 lines
1.2 KiB
Markdown
36 lines
1.2 KiB
Markdown
# genbindings
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The `genbindings` program regenerates the Qt bindings.
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## Architecture design
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Bindings are generated in two passes:
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Pass 1
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1. Scan input directory for header files.
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2. For each header file:
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3. Run `clang --ast-dump=json` to get a JSON ast.
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- This is somewhat slow, the results will be cached in `./cachedir` after the first run.
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- Strip all Clang AST nodes that were included from other files, to only consider the header's own definitions.
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4. Convert Clang AST to our own intermediate representation.
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5. Run some transformations on the intermediate representation.
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6. Cache and collect the global state of all known class names, enum names, and typedefs.
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Pass 2
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1. For each intermediate-representation AST:
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2. Emit "CABI" cpp/h pair.
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- The CABI is a projection of Qt into plain C. The translation unit itself is C++, but the header can be used as extern c.
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3. Emit Go binding file.
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- The Go binding uses CGO to call into the CABI binding.
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## Configuration
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It's tested to work on with Debian 12 / Qt 5.15 / Clang 14 / GCC 12.
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You should check the following configuration:
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- `config-libraries.go`: Input directories containing Qt headers
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- `config-allowlist.go`: Check everything
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