lucc - little & useless C compiler

Toy C compiler for x86-64. Both lexer and parser are handwritten (i.e. not using generators). The assembly is generated from AST traversal.

Features

• operators:
  • additive: +, -, +=, -=, ++, --
  • multiplicative: *, /, *=, /=
  • relation: ==, !=, >, >=, <, <=
  • shift: >>, <<, >>=, <<=
  • bitwise: &, |, ^, ~, &=, |=, ^=
  • logic: &&, ||, !
• control statements: if else, switch, goto, ?:
• loop statements: for, while, do while, break, continue
• pointers and arrays
• string literals
• typedef
• C Postprocessor subset
• static, extern
• sizeof, alignof, alignas
• constant folding
• functions
• scopes
• casts & conversions
• enum
• struct (wip)

Todo

• postprocessor: #if,#elif, macro functions
• union
• floating point numbers

Not planned

• variadic functions and macros
• thread local storage, atomic numbers
• bitfields

Command line options

• -h, --help: for displaying available compile options
• -c: no linking is preformed, only .obj files are produced
• -S: no assembling is preformed, only .asm files are produced
• -E: Only preprocessor is run
• --directory: Directory where the source files are located
• -i: Input files
• -o: Output file
• --dll: builds a dll
• --lib: builds a lib
• --astdump: Dump AST to console
• --test: used for running g-tests
• --ti: input test code (used for g-tests)

Dependencies

• MASM (included with Visual Studio) is used as an assembler.
• Microsoft Linker (included with Visual Studio) is used for linking.
• spdlog for logging.
• CLI11 for command line parsing.