Cygwin mingw cross compiler worked

[jpgpng]

Cygwin's cmake is the one faulty here. So, just don't use it. This means don't use the Cygwin shell altogether. We will use the setup like #1049 except instead of the mingw64 bin directory, we add the Cygwin's bin directory to Windows PATH.

The external cmake will have problem detecting the C and C++ compilers from Cygwin. So we help it by specifying these environment variables (we are using Windows' Command Prompt here):

set CC=x86_64-w64-mingw32-gcc
set CXX=x86_64-w64-mingw32-g++

The rest is the same as #1049

[VictorMiasnikov]

Cygwin's cmake is the one faulty here. So, just don't use it. This means don't use the Cygwin shell altogether. We will use the setup like #1049 except instead of the mingw64 bin directory, we add the Cygwin's bin directory to Windows PATH.

The external cmake will have problem detecting the C and C++ compilers from Cygwin. So we help it by specifying these environment variables (we are using Windows' Command Prompt here):

set CC=x86_64-w64-mingw32-gcc
set CXX=x86_64-w64-mingw32-g++

The rest is the same as #1049

This is about cm3 AMD64_MINGW target? But "source pseudo-OS" is "mingw from Cygwin"?

[jpgpng]

This about cm3 AMD64_MINGW target? But "source pseudo-OS" is "mingw from Cygwin"?

Yes. It's a cross compiler, cross compile from Cygwin to mingw.

[VictorMiasnikov]

Ok. Thanks for answer!

…

06.09.2022, 15:09, "jpgpng" ***@***.***>: This about cm3 AMD64_MINGW target? But "source pseudo-OS" is "mingw from Cygwin"? Yes. It's a cross compiler, cross compile from Cygwin to mingw.

[jpgpng]

I just find out that it's using Cygwin's native binutils but not the cross compiler's binutils. I have no idea why this hackish setup worked. It could be the two binutils are not very different from each other.

[VictorMiasnikov]

I reopen Issues N1052. I will add Mini-HowTo to it.

[VictorMiasnikov]

Please, see cm3 AMD64_CYGWIN mini-HowTo #1052 (comment)