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README.md

example-hello-clangtool

This is an example helping you build your cross-platform clangtool utility with CMake quickly on Windows/Linux. (If you just wanna a quick start with LLVM, it may help you focus on your idea ASAP)

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● Prepare vcpkg

Take Windows for example

mkdir vcpkg
cd vcpkg
git clone https://github.com/microsoft/vcpkg .
bootstrap-vcpkg.bat

● Prepare LLVM (Install & Build)

This step takes time. Depends on your performance of CPU.

vcpkg.exe install llvm:x64-windows

● Build HelloClangTool

mkdir hello-clangtool.git
cd hello-clangtools.git
git clone https://github.com./dougpuob/hello-clangtool.git  .
mkdir build
cd build 

# Debug build on Windows
cmake ..                                                                `
    -DCMAKE_TOOLCHAIN_FILE="C:\vcpkg\scripts\buildsystems\vcpkg.cmake"  `
    -DLLVM_CONFIGURATION_TYPES=Debug                                    `
    -DLLVM_BUILD_TYPE=Debug
    
cmake --build . --config Debug

# Release build on Windows
cmake ..                                                                `
    -DCMAKE_TOOLCHAIN_FILE="C:\vcpkg\scripts\buildsystems\vcpkg.cmake"  `
    -DLLVM_CONFIGURATION_TYPES=Release                                  `
    -DLLVM_BUILD_TYPE=Release
    
cmake --build . --config Release

main.cpp

#include "clang/Frontend/FrontendActions.h"
#include "clang/Tooling/CommonOptionsParser.h"
#include "clang/Tooling/Tooling.h"
#include "llvm/Support/CommandLine.h"

using namespace llvm;
using namespace clang::tooling;

static llvm::cl::OptionCategory MyToolCategory("my-tool options");
static cl::extrahelp CommonHelp(CommonOptionsParser::HelpMessage);
static cl::extrahelp MoreHelp("\nMore help content ...\n");

int main(int argc, const char **argv) {
  CommonOptionsParser OptionsParser(argc, argv, MyToolCategory);
  ClangTool Tool(OptionsParser.getCompilations(),
                 OptionsParser.getSourcePathList());
  return Tool.run(newFrontendActionFactory<clang::SyntaxOnlyAction>().get());
}

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● License

MIT

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● Author

Douglas Chen(陳鍵源) <dougpuob@gmail.com>