Dependencies
============
These are the dependencies currently used by Bitcoin Core. You can find instructions for installing them in the `build-*.md` file for your platform.
| Dependency | Version used | Minimum required | CVEs | Shared | [Bundled Qt library ](https://doc.qt.io/qt-5/configure-options.html#third-party-libraries ) |
| --- | --- | --- | --- | --- | --- |
| Berkeley DB | [4.8.30 ](https://www.oracle.com/technetwork/database/database-technologies/berkeleydb/downloads/index.html ) | 4.8.x | No | | |
| Boost | [1.71.0 ](https://www.boost.org/users/download/ ) | [1.58.0 ](https://github.com/bitcoin/bitcoin/pull/19667 ) | No | | |
| Clang | | [5.0+ ](https://releases.llvm.org/download.html ) (C++17 support) | | | |
| Expat | [2.2.7 ](https://libexpat.github.io/ ) | | No | Yes | |
| fontconfig | [2.12.1 ](https://www.freedesktop.org/software/fontconfig/release/ ) | | No | Yes | |
| FreeType | [2.7.1 ](https://download.savannah.gnu.org/releases/freetype ) | | No | | [Yes ](https://github.com/bitcoin/bitcoin/blob/master/depends/packages/qt.mk ) (Android only) |
| GCC | | [7+ ](https://gcc.gnu.org/ ) (C++17 support) | | | |
| HarfBuzz-NG | | | | | [Yes ](https://github.com/bitcoin/bitcoin/blob/master/depends/packages/qt.mk ) |
| libevent | [2.1.12-stable ](https://github.com/libevent/libevent/releases ) | [2.0.21 ](https://github.com/bitcoin/bitcoin/pull/18676 ) | No | | |
| libnatpmp | git commit [4536032... ](https://github.com/miniupnp/libnatpmp/tree/4536032ae32268a45c073a4d5e91bbab4534773a ) | | No | | |
| libpng | | | | | [Yes ](https://github.com/bitcoin/bitcoin/blob/master/depends/packages/qt.mk ) |
| librsvg | | | | | |
| MiniUPnPc | [2.2.2 ](https://miniupnp.tuxfamily.org/files ) | | No | | |
| PCRE | | | | | [Yes ](https://github.com/bitcoin/bitcoin/blob/master/depends/packages/qt.mk ) |
| Python (tests) | | [3.6 ](https://www.python.org/downloads ) | | | |
| qrencode | [3.4.4 ](https://fukuchi.org/works/qrencode ) | | No | | |
| Qt | [5.12.11 ](https://download.qt.io/official_releases/qt/ ) | [5.9.5 ](https://github.com/bitcoin/bitcoin/issues/20104 ) | No | | |
| SQLite | [3.32.1 ](https://sqlite.org/download.html ) | [3.7.17 ](https://github.com/bitcoin/bitcoin/pull/19077 ) | | | |
| XCB | | | | | [Yes ](https://github.com/bitcoin/bitcoin/blob/master/depends/packages/qt.mk ) (Linux only) |
| xkbcommon | | | | | [Yes ](https://github.com/bitcoin/bitcoin/blob/master/depends/packages/qt.mk ) (Linux only) |
| ZeroMQ | [4.3.1 ](https://github.com/zeromq/libzmq/releases ) | 4.0.0 | No | | |
| zlib | | | | | [Yes ](https://github.com/bitcoin/bitcoin/blob/master/depends/packages/qt.mk ) |
Controlling dependencies
------------------------
Some dependencies are not needed in all configurations. The following are some factors that affect the dependency list.
#### Options passed to `./configure`
* MiniUPnPc is not needed with `--without-miniupnpc` .
* libnatpmp is not needed with `--without-natpmp` .
* Berkeley DB is not needed with `--disable-wallet` or `--without-bdb` .
* SQLite is not needed with `--disable-wallet` or `--without-sqlite` .
* Qt is not needed with `--without-gui` .
* If the qrencode dependency is absent, QR support won't be added. To force an error when that happens, pass `--with-qrencode` .
* ZeroMQ is needed only with the `--with-zmq` option.
#### Other
* librsvg is only needed if you need to run `make deploy` on (cross-compilation to) macOS.
* Not-Qt-bundled zlib is required to build the [DMG tool ](../contrib/macdeploy/README.md#deterministic-macos-dmg-notes ) from the libdmg-hfsplus project.
