Re: How to use CMake with cygwin/mingw toolchain?

[Peter Quiring]

I also found just setting CC and CXX environment variables pointing to
the mingw gcc works.

Thanks for the links.

On Fri, Oct 20, 2017 at 5:11 PM, Yaakov Selkowitz  wrote:
> 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.
>>
>> 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 mingw.
>
> 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
>
> --
> Yaakov
>



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Peter Quiring

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Re: How to use CMake with cygwin/mingw toolchain?

[Yaakov Selkowitz]

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.
> 
> 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 mingw.

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

-- 
Yaakov



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Re: How to use CMake with cygwin/mingw toolchain?

[Hans-Bernhard Bröker]

Am 20.10.2017 um 14:50 schrieb Peter Quiring:


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.


You can just tell cmake to use them:

cmake  -D CMAKE_C_COMPILER=x86_64-w64-mingw32-gcc

But for the full story, you should really read the "cross compiling" 
chapter of cmake's documentation.


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Re: How to use CMake with cygwin/mingw toolchain?

[Arjen Markus]

That's the one indeed - I have no experience with the MinGW
distribution under Cygwin though. Perhaps I should try that one too
:).

Regards,

Arjen

2017-10-20 16:25 GMT+02:00 Peter Quiring :
> Hi Arjen,
>
> I'm talking about the mingw that is included with cygwin, not the
> standalone version.
> I assume you use mingw-w64.org but some of it's packages are too old.
> The mingw that is included with cygwin is updated more frequently, but
> it lacks a version of cmake.
> Try running the cygwin setup.exe and search for "mingw" and you'll see
> all the toolchains plus all the precompiled libraries.  Very nice.
>
>
>>Hi Peter,
>>
>>I am not sure I understand all the details, but I have been using
>>CMake under Cygwin and MinGW-w64/MSYS2 (I have to be complete here)
>>for quite a few years now. Both Cygwin and MinGW-w64/MSYS2 have their
>>own versions of CMake, so I use those.
>>
>>Do you mean to cross-compile?
>>
>>Regards,
>>
>>Arjen
>>
>>2017-10-20 14:50 GMT+02:00 Peter Quiring :
>>> What is the current process to use the mingw toolchain that is
>>> included with cygwin?
>>>
>>> There use to be a -mno-cygwin option used with gcc.
>>>
>>> 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.
>>>
>>> Cygwin also includes cmake. How would I configure it to use the mingw
>>> toolset that is included with cygwin? I also see some Qt5 *.cmake
>>> modules included in the Qt5 libraries for mingw.
>>>
>>> Would it be possible to include a version of cmake built for mingw?
>>>
>>> Thanks.
>>>
>>> --
>>> Peter Quiring
>>>
>
> --
> Peter Quiring
>
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Re: How to use CMake with cygwin/mingw toolchain?

[Peter Quiring]

Hi Arjen,

I'm talking about the mingw that is included with cygwin, not the
standalone version.
I assume you use mingw-w64.org but some of it's packages are too old.
The mingw that is included with cygwin is updated more frequently, but
it lacks a version of cmake.
Try running the cygwin setup.exe and search for "mingw" and you'll see
all the toolchains plus all the precompiled libraries.  Very nice.


>Hi Peter,
>
>I am not sure I understand all the details, but I have been using
>CMake under Cygwin and MinGW-w64/MSYS2 (I have to be complete here)
>for quite a few years now. Both Cygwin and MinGW-w64/MSYS2 have their
>own versions of CMake, so I use those.
>
>Do you mean to cross-compile?
>
>Regards,
>
>Arjen
>
>2017-10-20 14:50 GMT+02:00 Peter Quiring :
>> What is the current process to use the mingw toolchain that is
>> included with cygwin?
>>
>> There use to be a -mno-cygwin option used with gcc.
>>
>> 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.
>>
>> Cygwin also includes cmake. How would I configure it to use the mingw
>> toolset that is included with cygwin? I also see some Qt5 *.cmake
>> modules included in the Qt5 libraries for mingw.
>>
>> Would it be possible to include a version of cmake built for mingw?
>>
>> Thanks.
>>
>> --
>> Peter Quiring
>>

-- 
Peter Quiring

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Re: How to use CMake with cygwin/mingw toolchain?

[Arjen Markus]

Hi Peter,

I am not sure I understand all the details, but I have been using
CMake under Cygwin and MinGW-w64/MSYS2 (I have to be complete here)
for quite a few years now. Both Cygwin and MinGW-w64/MSYS2 have their
own versions of CMake, so I use those.

Do you mean to cross-compile?

Regards,

Arjen

2017-10-20 14:50 GMT+02:00 Peter Quiring :
> What is the current process to use the mingw toolchain that is
> included with cygwin?
>
> There use to be a -mno-cygwin option used with gcc.
>
> 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.
>
> Cygwin also includes cmake. How would I configure it to use the mingw
> toolset that is included with cygwin? I also see some Qt5 *.cmake
> modules included in the Qt5 libraries for mingw.
>
> Would it be possible to include a version of cmake built for mingw?
>
> Thanks.
>
> --
> Peter Quiring
>
> --
> Problem reports:   http://cygwin.com/problems.html
> FAQ:   http://cygwin.com/faq/
> Documentation: http://cygwin.com/docs.html
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>

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