[CMake] CPack and mswindows MAX_PATH for temporary work

[Mathieu Schroeter]

Hello,

Is MAX_PATH a problem with CPack? I received the following error when 
the destination is longer than MAX_PATH (here, 264 chars):

CPack Error: Problem copying file: 
S:/devel/bootstrap-windev/sysroot/toolchain/var/tmp/wpkg/source/epsitec+lydia/usr/share/epsitec/lydia/cache/data/Lydia.Arc.Components/lydia/electrum-arc/components/forms/options/CheckboxField/CheckboxField.styles.js 
-> 
S:/devel/bootstrap-windev/sysroot/toolchain/var/tmp/wpkg-8424/build/_CPack_Packages/win64-Source/TGZ/epsitec+lydia_0.1.0.0////usr/share/epsitec/lydia/cache/data/Lydia.Arc.Components/lydia/electrum-arc/components/forms/options/CheckboxField/CheckboxField.styles.js


   set(CPACK_SOURCE_GENERATOR "TGZ")
   set(CPACK_SOURCE_PACKAGE_FILE_NAME "epsitec+lydia_0.1.0.0")
   include(CPack)


If I reduce the longer, it works fine. I've just looked a bit in the 
sources. It seems that it uses UNC paths then I don't understand.
I'm using CMake 3.2.3.


Thanks

Regards,
Mathieu Schroeter