OpenBSD build guide ====================== (updated for OpenBSD 6.2) This guide describes how to build litecoind 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. Preparation ------------- Run the following as root to install the base dependencies for building: ```bash 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 https://github.com/litecoin-project/litecoin.git ``` See [dependencies.md](dependencies.md) for a complete overview. GCC ------- The default C++ compiler that comes with OpenBSD 6.2 is g++ 4.2.1. This version is old (from 2007), and is not able to compile the current version of Litecoin Core because it has no C++11 support. We'll install a newer version of GCC: ```bash pkg_add g++ ``` This compiler will not overwrite the system compiler, it will be installed as `egcc` and `eg++` in `/usr/local/bin`. ### Building BerkeleyDB BerkeleyDB is only necessary for the wallet functionality. To skip this, pass `--disable-wallet` to `./configure`. See "Berkeley DB" in [build-unix.md](build-unix.md#berkeley-db) for instructions on how to build BerkeleyDB 4.8. You cannot use the BerkeleyDB library from ports, for the same reason as boost above (g++/libstd++ incompatibility). ```bash # Pick some path to install BDB to, here we create a directory within the litecoin directory LITECOIN_ROOT=$(pwd) BDB_PREFIX="${LITECOIN_ROOT}/db4" mkdir -p $BDB_PREFIX # Fetch the source and verify that it is not tampered with curl -o db-4.8.30.NC.tar.gz 'http://download.oracle.com/berkeley-db/db-4.8.30.NC.tar.gz' echo '12edc0df75bf9abd7f82f821795bcee50f42cb2e5f76a6a281b85732798364ef db-4.8.30.NC.tar.gz' | sha256 -c # MUST output: (SHA256) db-4.8.30.NC.tar.gz: OK tar -xzf db-4.8.30.NC.tar.gz # Build the library and install to specified prefix cd db-4.8.30.NC/build_unix/ # Note: Do a static build so that it can be embedded into the executable, instead of having to find a .so at runtime ../dist/configure --enable-cxx --disable-shared --with-pic --prefix=$BDB_PREFIX CC=egcc CXX=eg++ CPP=ecpp make install # do NOT use -jX, this is broken ``` ### Resource limits The standard ulimit restrictions in OpenBSD are very strict: data(kbytes) 1572864 This, unfortunately, may no longer be enough to compile some `.cpp` files in the project, at least with GCC 4.9.4 (see issue [#6658](https://github.com/bitcoin/bitcoin/issues/6658)). 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. ### Building Litecoin Core **Important**: use `gmake`, not `make`. The non-GNU `make` will exit with a horrible error. Preparation: ```bash 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 ./autogen.sh ``` Make sure `BDB_PREFIX` is set to the appropriate path from the above steps. To configure with wallet: ```bash ./configure --with-gui=no CC=egcc CXX=eg++ CPP=ecpp \ BDB_LIBS="-L${BDB_PREFIX}/lib -ldb_cxx-4.8" BDB_CFLAGS="-I${BDB_PREFIX}/include" ``` To configure without wallet: ```bash ./configure --disable-wallet --with-gui=no CC=egcc CXX=eg++ CPP=ecpp ``` Build and run the tests: ```bash gmake # use -jX here for parallelism gmake check ``` Clang ------------------------------ ```bash pkg_add llvm ./configure --disable-wallet --with-gui=no CC=clang CXX=clang++ gmake # use -jX here for parallelism gmake check ```