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tldr/pages/common/clang.md

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# clang
> Compile C, C++, and Objective-C source files. Can be used as a drop-in replacement for GCC.
> Part of LLVM.
> More information: <https://clang.llvm.org/docs/ClangCommandLineReference.html>.
- Compile multiple source files into an executable:
`clang {{path/to/source1.c path/to/source2.c ...}} {{[-o|--output]}} {{path/to/output_executable}}`
- Activate output of all errors and warnings:
`clang {{path/to/source.c}} -Wall {{[-o|--output]}} {{output_executable}}`
- Show common warnings, debug symbols in output, and optimize without affecting debugging:
`clang {{path/to/source.c}} -Wall {{[-g|--debug]}} -Og {{[-o|--output]}} {{path/to/output_executable}}`
- Include libraries from a different path:
`clang {{path/to/source.c}} {{[-o|--output]}} {{path/to/output_executable}} -I{{path/to/header}} -L{{path/to/library}} -l{{library_name}}`
- Compile source code into LLVM Intermediate Representation (IR):
`clang {{[-S|--assemble]}} -emit-llvm {{path/to/source.c}} {{[-o|--output]}} {{path/to/output.ll}}`
- Compile source code into an object file without linking:
`clang {{[-c|--compile]}} {{path/to/source.c}}`
- Optimize the compiled program for performance:
`clang {{path/to/source.c}} -O{{1|2|3|fast}} {{[-o|--output]}} {{path/to/output_executable}}`
- Display version:
`clang --version`