He probably means there is no sense in such a duplication. To clarify:
-
The 32-bit installer is for Windows 32-bit.
-
The 64-bit installer is for Windows 64-bit (it will fail in Windows
32-bit, for example).
-
Once you have installed MSYS2 according to your OS bitness above, you
proceed to developing:
-
32-bit applications by installing mingw-w64-i686-gcc, if your Windows
is either 32/64-bit.
-
64-bit applications by installing mingw-w64-x86_64-gcc, if your
Windows is 64-bit.
-
You switch between the compilers by using:
- mingw32_shell.bat for the 32-bit gcc.
- mingw64_shell.bat for the 64-bit gcc.
A few notes:
- Both 32/64-bit packages reside on the same MSYS2 installation.
- You don’t need a duplicated MSYS2 installation for differentiating
between the environments, just check the $MSYSTEM variable or the
terminal title.
-
The mingw-w64 prefix just tells that this is a MinGW package rather
than MSYS (these have no prefix).
Did I explain it correctly, Alexey?
2014-09-07 17:29 GMT-03:00 Stephen Leake <[email protected]>:
> Alexey Pavlov <[email protected]> writes:
>
> > 07 сент. 2014 г., в 22:36, Stephen Leake <[email protected]>
> написал(а):
>
> >> I've installed both Msys 64 bit and Msys 32 bit just today, from scratch
> >> (I did not attempt to preserve my previous installation).
> > You can have only one MSYS installation.
>
> Why?
>
> The installer didn't complain, and they have different root directories.
>
> I think I understand why I don't _need_ both (I can install 32 and 64
> bit toolchains in msys 64), but it is simpler to keep track of whether
> I'm doing 32 or 64 bit compiles if they are completely separate.
>
> --
> -- Stephe
>
>
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