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llvm-building.md
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llvm-building.md

Compiling LLVM from source is mandatory if you are developing an in-source pass (within LLVM source tree). For example, a debug build of LLVM is much more pleasant to work with compared to an optimized one. To compile LLVM, please follow the following steps:

  1. Download LLVM source and unpack it in a directory of your choice which will refer to as [LLVM_SRC]

  2. Create a Seperate Build folder in your choice of directory

$ mkdir llvm-build
$ cd llvm-build
  1. Instruct CMake to detect and configure your build environment:
$ cmake -DCMAKE_BUILD_TYPE=Debug -DLLVM_TARGETS_TO_BUILD=X86 [LLVM_SRC]/llvm
  1. Now start the actual compilation within your build directory (This will take time)
$ cmake --build .
  1. If you want to install the llvm in default directory, ie; (/usr/local) run the following command
$ sudo cmake --build . --target install

Enjoy Building Plugins :)

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