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Update MinGW-w64 instructions for Windows cross-compilation (#8469)

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Fix outdated environment variables when setting up MinGW-w64 paths. Also
add a note to mind different host/target architectures (common pitfall
when compiling from e.g. Apple silicon).

Co-authored-by: Hugo Locurcio <hugo.locurcio@hugo.pro>
This commit is contained in:
Aitor Guevara
2023-11-16 12:53:29 +01:00
committed by GitHub
parent b9f8f9e5c8
commit 4a51190b60
1 changed files with 13 additions and 5 deletions
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18
contributing/development/compiling/compiling_for_windows.rst
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@@ -221,18 +221,26 @@ the following binaries in your ``PATH`` environment variable::
x86_64-w64-mingw32-gcc
If the binaries are not located in the ``PATH`` (e.g. ``/usr/bin``),
you can define the following environment variables to give a hint to
you can define the following environment variable to give a hint to
the build system::
export MINGW32_PREFIX="/path/to/i686-w64-mingw32-"
export MINGW64_PREFIX="/path/to/x86_64-w64-mingw32-"
export MINGW_PREFIX="/path/to/mingw"
Where ``/path/to/mingw`` is the path containing the ``bin`` directory where
``i686-w64-mingw32-gcc`` and ``x86_64-w64-mingw32-gcc`` are located (e.g.
``/opt/mingw-w64`` if the binaries are located in ``/opt/mingw-w64/bin``).
To make sure you are doing things correctly, executing the following in
the shell should result in a working compiler (the version output may
differ based on your system)::
${MINGW32_PREFIX}gcc --version
# i686-w64-mingw32-gcc (GCC) 6.1.0 20160427 (Mageia MinGW 6.1.0-1.mga6)
${MINGW_PREFIX}/bin/x86_64-w64-mingw32-gcc --version
# x86_64-w64-mingw32-gcc (GCC) 13.2.0
.. note:: When cross-compiling for Windows using MinGW-w64, keep in mind only
``x86_64`` and ``x86_32`` architectures are supported. Be sure to
specify the right ``arch=`` option when invoking SCons if building
from a different architecture.
Troubleshooting
~~~~~~~~~~~~~~~