58df0ef89d
While building llvm (clang, lld) against emscripten we see this [error](https://github.com/emscripten-forge/recipes/actions/runs/13803029307/job/38608794602#step:9:1715) ``` │ │ In file included from $SRC_DIR/llvm/lib/Frontend/OpenACC/ACC.cpp:9: │ │ $SRC_DIR/build/include/llvm/Frontend/OpenACC/ACC.h.inc:192:1: error: unknown type name 'LLVM_ABI' │ │ 192 | LLVM_ABI Directive getOpenACCDirectiveKind(llvm::StringRef Str); │ │ | ^ │ │ $SRC_DIR/build/include/llvm/Frontend/OpenACC/ACC.h.inc:192:19: error: expected ';' after top level declarator │ │ 192 | LLVM_ABI Directive getOpenACCDirectiveKind(llvm::StringRef Str); │ │ | ^ ``` Now this was happening because we weren't defining LLVM_ABI correctly when building against emscripten. If you see [llvm/Support/Compiler.h](https://github.com/llvm/llvm-project/blob/main/llvm/include/llvm/Support/Compiler.h#L206-L210), the condition only checked for the platform __WASM__ . Now Emscripten targets WebAssembly but doesn't imply the platform by default so the check isn't complete to define LLVM_ABI. The successful build after using this patch can be seen [here](https://github.com/emscripten-forge/recipes/actions/runs/13805214092/job/38614585621) (cherry picked from commit e57cd100ca297cf81854e35cccbf703edddd4aad)
C language Family Front-end
Welcome to Clang.
This is a compiler front-end for the C family of languages (C, C++ and Objective-C) which is built as part of the LLVM compiler infrastructure project.
Unlike many other compiler frontends, Clang is useful for a number of things beyond just compiling code: we intend for Clang to be host to a number of different source-level tools. One example of this is the Clang Static Analyzer.
If you're interested in more (including how to build Clang) it is best to read the relevant websites. Here are some pointers:
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Information on Clang: http://clang.llvm.org/
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Building and using Clang: http://clang.llvm.org/get_started.html
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Clang Static Analyzer: http://clang-analyzer.llvm.org/
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Information on the LLVM project: http://llvm.org/
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If you have questions or comments about Clang, a great place to discuss them is on the Clang forums:
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If you find a bug in Clang, please file it in the LLVM bug tracker: