derektian / ctoverilog

A C to verilog compiler

This is a fork of the code from www.c-to-verilog.com

The original code was written by Nadav Rotem.

Since the original code was not released under any form of source code control, and has not advanced for some time, I moved it to a public GIT repository in order to advance it further. Near term goals are to update the code to the latest LLVM relase (currently the code requires LLVM 2.5).

This code is licensed under the GPL v3 license, according to the terms in www.c-to-verilog.com

In order to compile this code, please install gcc 4.2.4 (different versions may work, but I've tried only with 4.2.4)

Installing and compiling the code (This has been tried on 64-bit CentOS 7.1):

You might require the following packages if you don't already have those:

sudo yum install git bison flex glibc-devel.i686 gcc-g++ cmake

Here we start

Get source code

cd $HOME
wget http://www.llvm.org/releases/2.5/llvm-2.5.tar.gz
wget http://llvm.org/releases/2.5/llvm-gcc-4.2-2.5.source.tar.gz

Extract source code

tar xvfz llvm-2.5.tar.gz
cd llvm-2.5/lib/Target

Clone the ctoverilog repository. Notice the target directory name. This is important!

git clone https://github.com/udif/ctoverilog.git Verilog
cd $HOME/llvm-2.5

Prepare default configuration

./configure

Fix the configuration to add the Verilog directory

sed -i -e 's/CppBackend/CppBackend Verilog/g' Makefile.config
sed -i '/Sparc/a\  Verilog' CMakeLists.txt

Now build LLVM. Notice we rebuild twice. The first make fails on lcc link problems. Rerunning ./configure and make will fix that. This is workaround until I figure out the root cause for this problem.

make ; ./configure ; make

Follow instructions from llvm-gcc4.2-2.5.source/README.LLVM to install the gcc front end to LLVM:

cd $HOME
wget http://llvm.org/releases/2.5/llvm-gcc-4.2-2.5.source.tar.gz
mkdir llvm-gcc
cd llvm-gcc
tar xvfz ../llvm-gcc-4.2-2.5.source.tar.gz
mkdir obj install
cd obj
LLVMOBJDIR=~/llvm-2.5
BUILDOPTIONS=LLVM_VERSION_INFO=2.5
../llvm-gcc4.2-2.5.source/configure --prefix=`pwd`/../install --program-prefix=llvm- --enable-llvm=$LLVMOBJDIR --enable-languages=c,c++ --disable-multilib
make $BUILDOPTIONS
make install