Please see C2Lang.org for more info about C2!

The C2 project attempts to create a new language, strongly based on C. In a nutshell, the main differences with C are:

• no more header files (too much typing)
• no includes
• packages (needed if we can't have includes)
• compiled per target (not per file)
• more logical keywords (public/local replaces static)
• integrated build system

Below are the instructions for building and using the C2Compiler.

Have fun! (and code..)

C2 is based on LLVM 3.2 and some parts of Clang 3.2. The design of C2C's C2Parser and C2Sema class are heavily based on clang's Parser and Sema class, so hereby my thanks to the Clang folks!

A short list of open items (the full list would probably fill-up GitHub) with their priority:

• [high] c2c: parse full syntax into AST
• [high] Makefile: fixed header dependencies and more .o files to .objs dir
• [high] c2c: add proper analysis for AST
• [high] c2c: unit test system
• [high] c2c: generate IR code for more AST elements
• [medium] c2c: improve C generation by generating forward declarations in C code.
• [medium] c2c: tab completion on targets in recipe / cmdline args
• [medium] tool: c2grep - grep only files in recipe
• [medium] tool: create c-parser for parsing C headers.
• [medium] tool: create c2style - astyle for C2.
• [low] c2tags/c2scope - only add files in recipe

C2 is based on LLVM 3.2 and some parts of Clang 3.2. To install C2, follow the steps below. The example shows how to install in $HOME/llvm-c2, but any other dir should work.

• download LLVM sources (http://llvm.org/releases/3.2/llvm-3.2.src.tar.gz)
• download Compiler RT sources (http://llvm.org/releases/3.2/compiler-rt-3.2.src.tar.gz)

To build:

tar -xf <path>/llvm-3.2.src.tar.gz
mv llvm-3.2.src llvm
cd llvm/projects
tar -xf <path>/compiler-rt-3.2.src.tar.gz
mv compiler-rt-3.2.src compiler-rt
cd ../tools
git clone git://github.com/c2lang/clang.git
cd clang
git co -b c2master origin/c2master
cd ../../..
mkdir llvm_build
../llvm/configure --enable-optimized --prefix=$HOME/llvm-c2/
make -j4
make install

Voila! When adding $HOME/llvm-c2/bin to the your $PATH, you should be able to build C2.

export PATH=$HOME/llvm-c2/bin:$PATH

To build C2: (llvm-c2/bin must be in PATH)

git clone git://github.com/c2lang/c2compiler.git
cd c2compiler/c2c
make -j4

If all goes well, the c2c executable should appear.

If you get an error with some Clang/C2 errors, try updating your clang C2 archive.

Not all examples (in the examples/ dir) work yet. Some still hit an assert. Some examples that work better than others:

./c2c multi
./c2c hello
./c2c iter
./c2c switch
./c2c working_ir

It's also possible to manually compile a single .c2 file without a recipe file with:

./c2c -f <file.c2>

To see all available options, run:

./c2c -h