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36 lines
1.0 KiB
Markdown
36 lines
1.0 KiB
Markdown
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# Building in Android
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Create two genrules: One to generate the CXX header, and one to generate the CXX
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source file. These are then used as inputs to the `cc_library_static`.
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```javascript
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// Generate a C++ header containing the C++ bindings
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// to the Rust exported functions in lib.rs.
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genrule {
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name: "libcxx_test_bridge_header",
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tools: ["cxxbridge"],
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cmd: "$(location cxxbridge) $(in) --header > $(out)",
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srcs: ["lib.rs"],
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out: ["lib.rs.h"],
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}
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// Generate the C++ code that Rust calls into.
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genrule {
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name: "libcxx_test_bridge_code",
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tools: ["cxxbridge"],
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cmd: "$(location cxxbridge) $(in) > $(out)",
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srcs: ["lib.rs"],
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out: ["lib.rs.cc"],
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}
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```
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<details>
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* The `cxxbridge` tool is a standalone tool that generates the C++ side of the
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bridge module. It is included in Android and available as a Soong tool.
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* By convention, if your Rust source file is `lib.rs` your header file will be
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named `lib.rs.h` and your source file will be named `lib.rs.cc`. This naming
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convention isn't enforced, though.
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</details>
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