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 -Ipath/to/header -Lpath/to/library -llibrary_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 -O1|2|3|fast -o|--output path/to/output_executable

• Display version:

clang --version