A modern B programming language compiler written in Go with LLVM IR backend and clang-like command-line interface.

The B programming language was developed by Ken Thompson and Dennis Ritchie at Bell Labs in 1969 as the predecessor to C.

Status: ✅ Feature-Complete • 225 tests passing • 75.1% coverage

# Build everything
make

# Compile and run a B program (automatic linking)
./blang examples/hello.b
./hello

Output: Hello, World!

• Go (>=1.21)
• clang/LLVM toolchain
• make

make
make install               # installs to $HOME/.local
# ensure PATH contains $HOME/.local/bin
export PATH="$HOME/.local/bin:$PATH"   # add to your shell profile
blang -V

make uninstall

make install DESTDIR=/custom/prefix

• Complete B Language Support: All B language features implemented
• Cross-platform: Runs natively on Linux (x86_64, aarch64) and macOS (x86_64, aarch64)
• Clang-like CLI Interface: Professional command-line options and workflow
• Multiple Output Formats: Executable, object files, assembly, LLVM IR
• LLVM IR Backend: Portable, optimized code generation
• Comprehensive Testing: 225 tests across 8 organized test files
• Modern Go Implementation: Clean, maintainable codebase

The blang compiler provides a clang-like command-line interface with comprehensive options:

# Generate executable
blang hello.b -o hello

# Generate LLVM IR
blang -emit-llvm hello.b -o hello.ll

# Generate object file
blang -c hello.b -o hello.o

# Generate assembly
blang -S hello.b -o hello.s

# Optimized executable with debug info
blang -O2 -g hello.b -o optimized

# Verbose compilation
blang -v hello.b

# Multiple library directories and libraries
blang hello.b -L/usr/lib -L/usr/local/lib -lpthread -lmath

# Options after arguments (flexible ordering)
blang hello.b -O2 -v

# All flags combined
blang -v -O3 -g -save-temps hello.b

• examples/hello.b - Hello world using write()
• examples/fibonacci.b - Fibonacci calculator
• examples/fizzbuzz.b - FizzBuzz 1-100
• examples/e-2.b - E-2 constant calculation
• examples/b.b - B compiler for PDP-7

# Run all tests
make test

# Run CLI-specific tests
go test -v -run TestCLI

# Run specific test categories
go test -v -run TestCLIBasicOptions
go test -v -run TestCLIOutputFormats

• CLI Usage Guide - Comprehensive command-line interface guide
• B Language Reference - Original manual by S.C.Johnson
• B Tutorial - A tutorial introduction by B.W.Kernighan
• Users' Reference to B - Ken Thompson's guide
• LLVM Documentation - LLVM IR reference
• BCause - C-based B compiler (inspiration)

MIT License - see LICENSE file.