[llvm-dev] Opt can't find 'hello' pass

[Joshua R Hilke via llvm-dev]

I’m just trying to run the hello world example from the LLVM Writing a Pass Tutorial (https://llvm.org/docs/WritingAnLLVMPass.html <https://llvm.org/docs/WritingAnLLVMPass.html>), but whenever I run:

$BUILD_DIR/bin/clang -c -emit-llvm hello.c

$BUILD_DIR/bin/opt -load $BUILD_DIR/lib/LLVMHello.so -hello < hello.bc > /dev/null



I get the following error:

bin/opt: unknown pass name ‘hello’



Which seems odd because if I run:

$BUILD_DIR/bin/opt -load $BUILD_DIR/lib/LLVMHello.so --help | grep hello


I get:

--hello 		- Hello World Pass


To build LLVM I’m running the following commands from my build directory:

cmake -G Ninja -DLLVM_ENABLE_PROJECTS=‘clang’ ../llvm

cmake --build . 


Just to clarify, I’m not writing my own pass. Just trying to run the ‘hello’ pass that comes default when building LLVM

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