UNIX BUILD NOTES
Some notes on how to build Bitcoin in Unix.
./autogen.sh ./configure make
This will build bitcoin-qt as well if the dependencies are met.
Library Purpose Description
libssl SSL Support Secure communications libdb4.8 Berkeley DB Wallet storage libboost Boost C++ Library miniupnpc UPnP Support Optional firewall-jumping support qt GUI GUI toolkit protobuf Payments in GUI Data interchange format used for payment protocol libqrencode QR codes in GUI Optional for generating QR codes
--with-miniupnpc No UPnP support miniupnp not required --disable-upnp-default (the default) UPnP support turned off by default at runtime --enable-upnp-default UPnP support turned on by default at runtime
IPv6 support may be disabled by setting:
--disable-ipv6 Disable IPv6 support
Licenses of statically linked libraries: Berkeley DB New BSD license with additional requirement that linked software must be free open source Boost MIT-like license miniupnpc New (3-clause) BSD license
- Versions used in this release:
- GCC 4.3.3
- OpenSSL 1.0.1c
- Berkeley DB 4.8.30.NC
- Boost 1.37
- miniupnpc 1.6
- qt 4.8.3
- protobuf 2.5.0
- libqrencode 3.2.0
Dependency Build Instructions: Ubuntu & Debian
sudo apt-get install build-essential sudo apt-get install libtool autotools-dev autoconf sudo apt-get install libssl-dev
for Ubuntu 12.04 and later:
sudo apt-get install libboost-all-dev
db4.8 packages are available here.
Ubuntu 12.04 and later have packages for libdb5.1-dev and libdb5.1++-dev, but using these will break binary wallet compatibility, and is not recommended.
for Ubuntu 13.10: libboost1.54-all-dev will not work. Remove libboost1.54-all-dev and install libboost1.53-all-dev
for Debian 7 (Wheezy) and later: The oldstable repository contains db4.8 packages. Add the following line to /etc/apt/sources.list, replacing [mirror] with any official debian mirror.
deb http://[mirror]/debian/ oldstable main
To enable the change run
sudo apt-get update
for other Ubuntu & Debian:
sudo apt-get install libdb4.8-dev sudo apt-get install libdb4.8++-dev sudo apt-get install libboost1.37-dev
(If using Boost 1.37, append -mt to the boost libraries in the makefile)
sudo apt-get install libminiupnpc-dev (see --with-miniupnpc and --enable-upnp-default)
Dependencies for the GUI: Ubuntu & Debian
If you want to build Bitcoin-Qt, make sure that the required packages for Qt development
are installed. Either Qt 4 or Qt 5 are necessary to build the GUI.
If both Qt 4 and Qt 5 are installed, Qt 4 will be used. Pass
--with-gui=qt5 to configure to choose Qt5.
To build without GUI pass
To build with Qt 4 you need the following:
apt-get install libqt4-dev libprotobuf-dev protobuf-compiler
For Qt 5 you need the following:
apt-get install libqt5gui5 libqt5core5 libqt5dbus5 qttools5-dev qttools5-dev-tools libprotobuf-dev
libqrencode (optional) can be installed with:
apt-get install libqrencode-dev
Once these are installed, they will be found by configure and a bitcoin-qt executable will be built by default.
The release is built with GCC and then "strip bitcoind" to strip the debug symbols, which reduces the executable size by about 90%.
tar -xzvf miniupnpc-1.6.tar.gz cd miniupnpc-1.6 make sudo su make install
You need Berkeley DB 4.8. If you have to build Berkeley DB yourself:
cd build_unix/ ../dist/configure --enable-cxx make sudo make install
If you need to build Boost yourself:
sudo su ./bootstrap.sh ./bjam install
To help make your bitcoin installation more secure by making certain attacks impossible to exploit even if a vulnerability is found, binaries are hardened by default. This can be disabled with:
./configure --enable-hardening ./configure --disable-hardening
Hardening enables the following features:
Position Independent Executable Build position independent code to take advantage of Address Space Layout Randomization offered by some kernels. An attacker who is able to cause execution of code at an arbitrary memory location is thwarted if he doesn't know where anything useful is located. The stack and heap are randomly located by default but this allows the code section to be randomly located as well.
On an Amd64 processor where a library was not compiled with -fPIC, this will cause an error such as: "relocation R_X86_64_32 against `......' can not be used when making a shared object;"
To test that you have built PIE executable, install scanelf, part of paxutils, and use:
scanelf -e ./bitcoin
The output should contain: TYPE ET_DYN
Non-executable Stack If the stack is executable then trivial stack based buffer overflow exploits are possible if vulnerable buffers are found. By default, bitcoin should be built with a non-executable stack but if one of the libraries it uses asks for an executable stack or someone makes a mistake and uses a compiler extension which requires an executable stack, it will silently build an executable without the non-executable stack protection.
To verify that the stack is non-executable after compiling use:
scanelf -e ./bitcoin
the output should contain: STK/REL/PTL RW- R-- RW-
The STK RW- means that the stack is readable and writeable but not executable.
When the intention is to run only a P2P node without a wallet, bitcoin may be compiled in disable-wallet mode with:
In this case there is no dependency on Berkeley DB 4.8.
Mining is also possible in disable-wallet mode, but only using the