Toyc-ch1 command not found

I was following the instructions given in the “Chapter 1: Toy Language and AST” tutorial. When I run the following command :

path/to/BUILD/bin/toyc-ch1 test/Examples/Toy/Ch1/ast.toy -emit=ast

I get this error: /home/user3/Desktop/LLVM_OFFICIAL/llvm-project/build/bin/toyc-ch1: No such file or directory

I have build llvm and mlir using following cmake variable values :

cmake -G Ninja -DCMAKE_BUILD_TYPE="Debug"   

Kindly help.

You are likely missing -DLLVM_BUILD_EXAMPLES=1 in your cmake config.

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I added -DLLVM_BUILD_EXAMPLES=1 and tried building llvm and mlir again. This time I encountered following error :

[3325/4308] Linking CXX executable bin/toyc-ch6
FAILED: bin/toyc-ch6 
/usr/bin/ld: cannot find -lMLIRExecutionEngine

I suppose that if your host machine is not a RISC-V, you also need to build the host target for the execution engine to work.

Alternatively, you can separately build the toyc-ch1 target and skip the ch6 and ch7 that require a JIT.


The error message isn’t great: our cmake should check this before we reach the link step (diagnose at config time).