clang-cl hello.cpp Or with the native Clang driver:
pacman -S mingw-w64-clang-x86_64-clang Compile a simple C program ( hello.c ) #include <stdio.h> int main() printf("Hello, Clang on Windows!\n"); return 0; clang compiler windows
clang hello.c -o hello.exe #include <iostream> int main() std::cout << "Hello, Clang++ on Windows!\n"; return 0; clang-cl hello
clang++ hello.cpp -fuse-ld=lld --target=x86_64-pc-windows-msvc | Flag | Purpose | |------|---------| | -o | Output filename | | -g | Generate debug info (PDB) | | -O2 | Optimize for speed | | -std=c++17 | Specify C++ standard | | -Wall | Enable most warnings | | -Wextra | Enable extra warnings | | -fuse-ld=lld | Use LLVM’s LLD linker (faster) | | -m64 or -m32 | Target 64-bit or 32-bit | Debugging with Clang on Windows Compile with debug symbols: Whether you're a beginner or a seasoned developer,
clang++ hello.cpp -o hello.exe When using Clang from Visual Studio’s developer command prompt:
clang++ -g myprogram.cpp -o myprogram.exe Use or LLDB (experimental on Windows) or GDB (from MSYS2) for debugging. Common Issues & Solutions | Problem | Solution | |---------|----------| | stdio.h not found | Run from VS Developer Command Prompt or install Windows SDK | | Linker errors | Add -fuse-ld=lld or ensure link.exe (MSVC) is in PATH | | 32-bit vs 64-bit mismatch | Use -m32 or -m64 explicitly | | Debugging doesn’t work | Use -g and generate PDB (Program Database) | Clang vs MSVC on Windows | Feature | Clang | MSVC | |---------|-------|------| | Speed | Fast | Moderate | | Error messages | Very clear | Verbose | | C++ standard support | Excellent | Very good | | Windows-specific features | Good | Native | | PDB generation | Supported | Native | | Integration with Visual Studio | Good | Perfect | Summary Clang on Windows is a powerful alternative to MSVC, offering faster compilation, clearer diagnostics, and cross-platform flexibility. It integrates well with Visual Studio, CMake, and existing Windows toolchains. Whether you're a beginner or a seasoned developer, adding Clang to your Windows toolbox is a smart move. Would you like a ready-to-use CMake example with Clang on Windows or a sample script to automate installation?