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doc: Drop no longer required notes for Windows builds

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Hennadii Stepanov 2021-05-28 10:25:00 +03:00
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doc/build-windows.md
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@ -81,27 +81,6 @@ 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 +121,3 @@ 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).