NVC is a GPLv3 VHDL compiler and simulator aiming for IEEE 1076-1993 compliance. See these blog posts for background information. NVC should not be considered a production quality tool and language support is lacking in many areas. However it has been successfully used to simulate several real-world designs.
Brief usage example:
$ nvc -a my_design.vhd my_tb.vhd $ nvc -e my_tb $ nvc -r my_tb
The full manual can be read after installing NVC using
man nvc or
Report bugs using the GitHub issue tracker.
NVC is developped on Debian Linux and has been reported to work on OS X and Windows under Cygwin. Ports to other Unix-like systems are welcome.
To build from a Git clone:
./autogen.sh ./tools/fetch-ieee.sh mkdir build && cd build ../configure make make install
Generating the configure script requires autoconf and automake version 1.12 or later.
To use a specific version of LLVM add
to the configure command. LLVM 3.0 or later is required.
NVC also depends on GNU Flex and Bison to generate the parser. The Bison version should be at least 2.5.
If a readline-compatible library is installed it will be used to provide line editing in the interactive mode.
On a Debian derivative the following should be sufficient to install all required dependencies:
sudo apt-get install build-essential automake autoconf flex bison \ libreadline-dev tcl-dev check llvm-dev
Windows support is via Cygwin.
Due to copyright restrictions the IEEE library source files cannot be freely redistributed and must be downloaded from an external source prior to building. See lib/ieee/README for details.
To recompile the standard libraries:
make -C lib clean make bootstrap
Note this happens automatically when installing.
To run the regression tests:
The unit tests require the check library.
You may need to install additional Ruby libraries:
gem install colorize getopt
NVC provides scripts to compile the simulation libraries of common FPGA vendors.
- For Xilinx ISE use
- For Altera Quartus use
The libraries will be installed under