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diff --git a/doc/build-windows.md b/doc/build-windows.md index f88b9739de..657865795c 100644 --- a/doc/build-windows.md +++ b/doc/build-windows.md @@ -5,11 +5,9 @@ Below are some notes on how to build Bitcoin Core for Windows. The options known to work for building Bitcoin Core on Windows are: -* On Linux, using the [Mingw-w64](https://mingw-w64.org/doku.php) cross compiler tool chain. Ubuntu Bionic 18.04 is required -and is the platform used to build the Bitcoin Core Windows release binaries. -* On Windows, using [Windows -Subsystem for Linux (WSL)](https://docs.microsoft.com/windows/wsl/about) and the Mingw-w64 cross compiler tool chain. -* On Windows, using a native compiler tool chain such as [Visual Studio](https://www.visualstudio.com). See [README.md](/build_msvc/README.md). +* On Linux, using the [Mingw-w64](https://www.mingw-w64.org/) cross compiler tool chain. +* On Windows, using [Windows Subsystem for Linux (WSL)](https://docs.microsoft.com/windows/wsl/about) and Mingw-w64. +* On Windows, using [Microsoft Visual Studio](https://www.visualstudio.com). See [README.md](/build_msvc/README.md). Other options which may work, but which have not been extensively tested are (please contribute instructions): @@ -18,40 +16,12 @@ Other options which may work, but which have not been extensively tested are (pl Installing Windows Subsystem for Linux --------------------------------------- -With Windows 10, Microsoft has released a new feature named the [Windows -Subsystem for Linux (WSL)](https://docs.microsoft.com/windows/wsl/about). This -feature allows you to run a bash shell directly on Windows in an Ubuntu-based -environment. Within this environment you can cross compile for Windows without -the need for a separate Linux VM or server. Note that while WSL can be installed with -other Linux variants, such as OpenSUSE, the following instructions have only been -tested with Ubuntu. - -This feature is not supported in versions of Windows prior to Windows 10 or on -Windows Server SKUs. In addition, it is available [only for 64-bit versions of -Windows](https://docs.microsoft.com/windows/wsl/install-win10). - -Full instructions to install WSL are available on the above link. -To install WSL on Windows 10 with Fall Creators Update installed (version >= 16215.0) do the following: - -1. Enable the Windows Subsystem for Linux feature - * Open the Windows Features dialog (`OptionalFeatures.exe`) - * Enable 'Windows Subsystem for Linux' - * Click 'OK' and restart if necessary -2. Install Ubuntu - * Open Microsoft Store and search for "Ubuntu 18.04" or use [this link](https://www.microsoft.com/store/productId/9N9TNGVNDL3Q) - * Click Install -3. Complete Installation - * Open a cmd prompt and type "Ubuntu1804" - * Create a new UNIX user account (this is a separate account from your Windows account) - -After the bash shell is active, you can follow the instructions below, starting -with the "Cross-compilation" section. Compiling the 64-bit version is -recommended, but it is possible to compile the 32-bit version. +Follow the upstream installation instructions, available [here](https://docs.microsoft.com/windows/wsl/install-win10). Cross-compilation for Ubuntu and Windows Subsystem for Linux ------------------------------------------------------------ -The steps below can be performed on Ubuntu (including in a VM) or WSL. The depends system +The steps below can be performed on Ubuntu or WSL. The depends system will also work on other Linux distributions, however the commands for installing the toolchain will be different. @@ -81,27 +51,6 @@ The first step is to install the mingw-w64 cross-compilation tool chain: sudo apt install g++-mingw-w64-x86-64 -Next, set the default `mingw32 g++` compiler option to POSIX<sup>[1](#footnote1)</sup>: - -``` -sudo update-alternatives --config x86_64-w64-mingw32-g++ -``` - -After running the above command, you should see output similar to that below. -Choose the option that ends with `posix`. - -``` -There are 2 choices for the alternative x86_64-w64-mingw32-g++ (providing /usr/bin/x86_64-w64-mingw32-g++). - - Selection Path Priority Status ------------------------------------------------------------- - 0 /usr/bin/x86_64-w64-mingw32-g++-win32 60 auto mode -* 1 /usr/bin/x86_64-w64-mingw32-g++-posix 30 manual mode - 2 /usr/bin/x86_64-w64-mingw32-g++-win32 60 manual mode - -Press <enter> to keep the current choice[*], or type selection number: -``` - Once the toolchain is installed the build steps are common: Note that for WSL the Bitcoin Core source path MUST be somewhere in the default mount file system, for @@ -142,13 +91,3 @@ way. This will install to `c:\workspace\bitcoin`, for example: You can also create an installer using: make deploy - -Footnotes ---------- - -<a name="footnote1">1</a>: Starting from Ubuntu Xenial 16.04, both the 32 and 64 bit Mingw-w64 packages install two different -compiler options to allow a choice between either posix or win32 threads. The default option is win32 threads which is the more -efficient since it will result in binary code that links directly with the Windows kernel32.lib. Unfortunately, the headers -required to support win32 threads conflict with some of the classes in the C++11 standard library, in particular std::mutex. -It's not possible to build the Bitcoin Core code using the win32 version of the Mingw-w64 cross compilers (at least not without -modifying headers in the Bitcoin Core source code). |