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Some contributions to this Wiki comes from the team at Bitcoin Core

OpenBSD Build Instructions

(updated for OpenBSD 6.2)

This guide describes how to build genesisd and command-line utilities on OpenBSD.

OpenBSD is most commonly used as a server OS, so this guide does not contain instructions for building the GUI.


Run the following as root to install the base dependencies for building:

pkg_add git gmake libevent libtool
pkg_add autoconf # (select highest version, e.g. 2.69)
pkg_add automake # (select highest version, e.g. 1.15)
pkg_add python # (select highest version, e.g. 3.6)
pkg_add boost

git clone


From OpenBSD 6.2 onwards a C++11-supporting clang compiler is part of the base image, and while building it is necessary to make sure that this compiler is used and not ancient g++ 4.2.1. This is done by appending `CC=cc CXX=c++` to configuration commands. Mixing different compilers within the same executable will result in linker errors.

Building BerkeleyDB

BerkeleyDB is only necessary for the wallet functionality. To skip this, pass `--disable-wallet` to `./configure` and skip to the next section.

It is recommended to use Berkeley DB 4.8. You cannot use the BerkeleyDB library from ports, for the same reason as boost above (g++/libstd++ incompatibility). If you have to build it yourself, perform the following:

./contrib/ `pwd` CC=cc CXX=c++

from the root of the repository. Then set `BDB_PREFIX` for the next section:

export BDB_PREFIX="$PWD/db4"

Building Genesis


Use `gmake`, not `make`. The non-GNU `make` will exit with a horrible error.


export AUTOCONF_VERSION=2.69 # replace this with the autoconf version that you installed
export AUTOMAKE_VERSION=1.15 # replace this with the automake version that you installed

Make sure `BDB_PREFIX` is set to the appropriate path from the above steps.

Configuration for Wallet

./configure --with-gui=no CC=cc CXX=c++ \
BDB_LIBS="-L${BDB_PREFIX}/lib -ldb_cxx-4.8" BDB_CFLAGS="-I${BDB_PREFIX}/include"

Configuration without Wallet

./configure --disable-wallet --with-gui=no CC=cc CXX=c++

Build and Run Tests

gmake # use -jX here for parallelism
gmake check

Resource Limits

If the build runs into out-of-memory errors, the instructions in this section might help.

The standard ulimit restrictions in OpenBSD are very strict:

data(kbytes)         1572864

This, unfortunately, in some cases not enough to compile some `.cpp` files in the project. If your user is in the `staff` group the limit can be raised with:

ulimit -d 3000000

The change will only affect the current shell and processes spawned by it.

To make the change system-wide, change `datasize-cur` and `datasize-max` in `/etc/login.conf`, and reboot.