90b5c4eefb
This fixes the regression in PR #15964 as noted here: https://github.com/bitcoin/bitcoin/pull/15964/files#r298798933
208 lines
8.3 KiB
Markdown
208 lines
8.3 KiB
Markdown
# macOS Build Instructions and Notes
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The commands in this guide should be executed in a Terminal application.
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The built-in one is located in
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```
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/Applications/Utilities/Terminal.app
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```
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## Preparation
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Install the macOS command line tools:
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```shell
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xcode-select --install
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```
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When the popup appears, click `Install`.
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Then install [Homebrew](https://brew.sh).
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## Dependencies
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```shell
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brew install automake berkeley-db4 libtool boost miniupnpc openssl pkg-config protobuf python qt libevent qrencode
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```
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See [dependencies.md](dependencies.md) for a complete overview.
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If you want to build the disk image with `make deploy` (.dmg / optional), you need RSVG:
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```shell
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brew install librsvg
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```
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## Berkeley DB
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It is recommended to use Berkeley DB 4.8. If you have to build it yourself,
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you can use [this](/contrib/install_db4.sh) script to install it
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like so:
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```shell
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./contrib/install_db4.sh .
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```
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from the root of the repository.
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**Note**: You only need Berkeley DB if the wallet is enabled (see [*Disable-wallet mode*](/doc/build-osx.md#disable-wallet-mode)).
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## Build Bitcoin Core
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1. Clone the Bitcoin Core source code:
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```shell
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git clone https://github.com/bitcoin/bitcoin
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cd bitcoin
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```
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2. Build Bitcoin Core:
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Configure and build the headless Bitcoin Core binaries as well as the GUI (if Qt is found).
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You can disable the GUI build by passing `--without-gui` to configure.
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```shell
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./autogen.sh
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./configure
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make
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```
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3. It is recommended to build and run the unit tests:
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```shell
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make check
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```
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4. You can also create a `.dmg` that contains the `.app` bundle (optional):
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```shell
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make deploy
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```
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## `disable-wallet` mode
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When the intention is to run only a P2P node without a wallet, Bitcoin Core may be
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compiled in `disable-wallet` mode with:
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```shell
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./configure --disable-wallet
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```
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In this case there is no dependency on Berkeley DB 4.8.
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Mining is also possible in disable-wallet mode using the `getblocktemplate` RPC call.
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## Running
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Bitcoin Core is now available at `./src/bitcoind`
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Before running, you may create an empty configuration file:
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```shell
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mkdir -p "/Users/${USER}/Library/Application Support/Bitcoin"
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touch "/Users/${USER}/Library/Application Support/Bitcoin/bitcoin.conf"
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chmod 600 "/Users/${USER}/Library/Application Support/Bitcoin/bitcoin.conf"
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```
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The first time you run bitcoind, it will start downloading the blockchain. This process could
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take many hours, or even days on slower than average systems.
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You can monitor the download process by looking at the debug.log file:
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```shell
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tail -f $HOME/Library/Application\ Support/Bitcoin/debug.log
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```
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## Other commands:
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```shell
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./src/bitcoind -daemon # Starts the bitcoin daemon.
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./src/bitcoin-cli --help # Outputs a list of command-line options.
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./src/bitcoin-cli help # Outputs a list of RPC commands when the daemon is running.
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```
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## Notes
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* Tested on OS X 10.10 Yosemite through macOS 10.14 Mojave on 64-bit Intel
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processors only.
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* Building with downloaded Qt binaries is not officially supported. See the notes in [#7714](https://github.com/bitcoin/bitcoin/issues/7714).
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## Deterministic macOS DMG Notes
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Working macOS DMGs are created in Linux by combining a recent `clang`, the Apple
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`binutils` (`ld`, `ar`, etc) and DMG authoring tools.
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Apple uses `clang` extensively for development and has upstreamed the necessary
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functionality so that a vanilla clang can take advantage. It supports the use of `-F`,
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`-target`, `-mmacosx-version-min`, and `--sysroot`, which are all necessary when
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building for macOS.
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Apple's version of `binutils` (called `cctools`) contains lots of functionality missing in the
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FSF's `binutils`. In addition to extra linker options for frameworks and sysroots, several
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other tools are needed as well such as `install_name_tool`, `lipo`, and `nmedit`. These
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do not build under Linux, so they have been patched to do so. The work here was used as
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a starting point: [mingwandroid/toolchain4](https://github.com/mingwandroid/toolchain4).
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In order to build a working toolchain, the following source packages are needed from
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Apple: `cctools`, `dyld`, and `ld64`.
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These tools inject timestamps by default, which produce non-deterministic binaries. The
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`ZERO_AR_DATE` environment variable is used to disable that.
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This version of `cctools` has been patched to use the current version of `clang`'s headers
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and its `libLTO.so` rather than those from `llvmgcc`, as it was originally done in `toolchain4`.
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To complicate things further, all builds must target an Apple SDK. These SDKs are free to
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download, but not redistributable. To obtain it, register for an Apple Developer Account,
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then download the [Xcode 7.3.1 dmg](https://developer.apple.com/devcenter/download.action?path=/Developer_Tools/Xcode_7.3.1/Xcode_7.3.1.dmg).
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This file is several gigabytes in size, but only a single directory inside is needed:
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```
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Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk
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```
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Unfortunately, the usual Linux tools (7zip, hpmount, loopback mount) are incapable of
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opening this file. To create a tarball suitable for Gitian input, there are two options:
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Using macOS, you can mount the DMG, and then create it with:
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```shell
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hdiutil attach Xcode_7.3.1.dmg
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tar -C /Volumes/Xcode/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/ -czf MacOSX10.11.sdk.tar.gz MacOSX10.11.sdk
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```
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Alternatively, you can use 7zip and SleuthKit to extract the files one by one. The script
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[`extract-osx-sdk.sh`](./../contrib/macdeploy/extract-osx-sdk.sh) automates this. First
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ensure the DMG file is in the current directory, and then run the script. You may wish to
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delete the `intermediate 5.hfs` file and `MacOSX10.11.sdk` (the directory) when you've
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confirmed the extraction succeeded.
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```shell
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apt-get install p7zip-full sleuthkit
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contrib/macdeploy/extract-osx-sdk.sh
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rm -rf 5.hfs MacOSX10.11.sdk
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```
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The Gitian descriptors build 2 sets of files: Linux tools, then Apple binaries which are
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created using these tools. The build process has been designed to avoid including the
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SDK's files in Gitian's outputs. All interim tarballs are fully deterministic and may be freely
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redistributed.
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`genisoimage` is used to create the initial DMG. It is not deterministic as-is, so it has been
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patched. A system `genisoimage` will work fine, but it will not be deterministic because
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the file-order will change between invocations. The patch can be seen here: [theuni/osx-cross-depends](https://raw.githubusercontent.com/theuni/osx-cross-depends/master/patches/cdrtools/genisoimage.diff).
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No effort was made to fix this cleanly, so it likely leaks memory badly. But it's only used for
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a single invocation, so that's no real concern.
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`genisoimage` cannot compress DMGs, so afterwards, the DMG tool from the
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`libdmg-hfsplus` project is used to compress it. There are several bugs in this tool and its
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maintainer has seemingly abandoned the project. It has been forked and is available
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(with fixes) here: [theuni/libdmg-hfsplus](https://github.com/theuni/libdmg-hfsplus).
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The DMG tool has the ability to create DMGs from scratch as well, but this functionality is
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broken. Only the compression feature is currently used. Ideally, the creation could be fixed
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and `genisoimage` would no longer be necessary.
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Background images and other features can be added to DMG files by inserting a
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`.DS_Store` before creation. This is generated by the script
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`contrib/macdeploy/custom_dsstore.py`.
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As of OS X 10.9 Mavericks, using an Apple-blessed key to sign binaries is a requirement in
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order to satisfy the new Gatekeeper requirements. Because this private key cannot be
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shared, we'll have to be a bit creative in order for the build process to remain somewhat
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deterministic. Here's how it works:
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- Builders use Gitian to create an unsigned release. This outputs an unsigned DMG which
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users may choose to bless and run. It also outputs an unsigned app structure in the form
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of a tarball, which also contains all of the tools that have been previously (deterministically)
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built in order to create a final DMG.
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- The Apple keyholder uses this unsigned app to create a detached signature, using the
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script that is also included there. Detached signatures are available from this [repository](https://github.com/bitcoin-core/bitcoin-detached-sigs).
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- Builders feed the unsigned app + detached signature back into Gitian. It uses the
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pre-built tools to recombine the pieces into a deterministic DMG.
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