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Subject: Re: How to use CMake with cygwin/mingw toolchain?
To: cygwin AT cygwin DOT com
References: <CA+3dX1xvZZLXy9ax5MHeu80N6V8SCORx6wcJGMoUkAvy5pKAkg AT mail DOT gmail DOT com>
From: Yaakov Selkowitz <yselkowitz AT cygwin DOT com>
Message-ID: <aaae0288-a012-f49b-dcbb-2b1952622ed5@cygwin.com>
Date: Fri, 20 Oct 2017 16:11:03 -0500
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From: Yaakov Selkowitz <yselkowitz AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Message-ID: <aaae0288-a012-f49b-dcbb-2b1952622ed5 AT cygwin DOT com>
Subject: Re: How to use CMake with cygwin/mingw toolchain?
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On 2017-10-20 07:50, Peter Quiring wrote:
> What is the current process to use the mingw toolchain that is
> included with cygwin?

Treat it like any other cross-compiling scenario.

> There use to be a -mno-cygwin option used with gcc.

That was an ugly hack which never really worked correctly and which we
happily rid ourselves years ago.

> The mingw versions have x86_64-w64-mingw32- or i686-w64-mingw32- added
> to their exe names. Currently I just use these directly but I want to
> use cmake.
>=20
> Cygwin also includes cmake. How would I configure it to use the mingw
> toolset that is included with cygwin?

You need to provide a number of options, see:

https://github.com/cygwinports/cygport/blob/master/cygclass/cmake.cygclass#=
L137

> I also see some Qt5 *.cmake modules included in the Qt5 libraries for min=
gw.

Those, like all my packages, are built with cygport.

> Would it be possible to include a version of cmake built for mingw?

No, but you can create a CMake toolchain file with all the options so
that you don't have to specify them each time:

https://cmake.org/Wiki/CMake_Cross_Compiling

--=20
Yaakov


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