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merge bitcoin#22093: Try posix-specific CXX first for mingw32 host
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@ -1,3 +1,7 @@
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ifneq ($(shell which $(host)-g++-posix),)
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mingw32_CXX := $(host)-g++-posix
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endif
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mingw32_CFLAGS=-pipe
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mingw32_CFLAGS=-pipe
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mingw32_CXXFLAGS=$(mingw32_CFLAGS)
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mingw32_CXXFLAGS=$(mingw32_CFLAGS)
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@ -39,27 +39,6 @@ The first step is to install the mingw-w64 cross-compilation tool chain:
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sudo apt-get install g++-mingw-w64-x86-64 mingw-w64-x86-64-dev
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sudo apt-get install g++-mingw-w64-x86-64 mingw-w64-x86-64-dev
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Next, set the default `mingw32 g++` compiler option to POSIX<sup>[1](#footnote1)</sup>:
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```
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sudo update-alternatives --config x86_64-w64-mingw32-g++
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```
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After running the above command, you should see output similar to that below.
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Choose the option that ends with `posix`.
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```
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There are 2 choices for the alternative x86_64-w64-mingw32-g++ (providing /usr/bin/x86_64-w64-mingw32-g++).
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Selection Path Priority Status
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------------------------------------------------------------
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0 /usr/bin/x86_64-w64-mingw32-g++-win32 60 auto mode
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* 1 /usr/bin/x86_64-w64-mingw32-g++-posix 30 manual mode
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2 /usr/bin/x86_64-w64-mingw32-g++-win32 60 manual mode
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Press <enter> to keep the current choice[*], or type selection number:
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```
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Once the toolchain is installed the build steps are common:
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Once the toolchain is installed the build steps are common:
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Note that for WSL the Dash Core source path MUST be somewhere in the default mount file system, for
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Note that for WSL the Dash Core source path MUST be somewhere in the default mount file system, for
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@ -100,13 +79,3 @@ way. This will install to `c:\workspace\dash`, for example:
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You can also create an installer using:
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You can also create an installer using:
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make deploy
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make deploy
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Footnotes
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---------
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<a name="footnote1">1</a>: Starting from Ubuntu Xenial 16.04, both the 32 and 64 bit Mingw-w64 packages install two different
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compiler options to allow a choice between either posix or win32 threads. The default option is win32 threads which is the more
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efficient since it will result in binary code that links directly with the Windows kernel32.lib. Unfortunately, the headers
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required to support win32 threads conflict with some of the classes in the C++11 standard library, in particular std::mutex.
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It's not possible to build the Dash Core code using the win32 version of the Mingw-w64 cross compilers (at least not without
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modifying headers in the Dash Core source code).
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