Support the MinGW Compiler Toolchain

[JonasGilg]

In order to support MinGW all of our dependencies have to work with the pipeline. This issue will track the progress on the dependencies and documents all important information for future users.

• [x] glew
• [x] freeglut
• [x] c-ares
• [x] curl
• [x] curlpp
• [x] libtiff
• [x] spdlog
• [x] civetweb
• [x] jsonHPP
• [x] doctest
• [x] gli
• [x] glm
• [x] tinygltf
• [x] stb
• [x] opensg-1.8
• [x] vista
• [x] cspice
• [ ] cef

[JonasGilg]

Environment

Install MSYS2

• TODO

Install dependencies

• pacman -S mingw-w64-x86_64-dlfcn
• pacman -S mingw-w64-x86_64-cmake
• pacman -S mingw-w64-x86_64-make
• pacman -S mingw-w64-x86_64-gcc
• pacman -S mingw-w64-x86_64-g++

[JonasGilg]

Ok, OpenSG is problematic, as it has a lot of these errors:

OSGSystem/OSGImage.inl:105:49: error: specialization of 'void osg::SField<SFieldTypeT, fieldNameSpace>::pushValueByStr(const osg::Char8*) [with FieldTypeT = osg:: FCPtr<osg::AttachementContainerPtr, osg::Image>; int fieldNameSpace = 0; osg::Char8 = char]' after instantiation
  105 | void SFImagePtr::pushValueByStr(const Char8 *str)
      |                                                 ^

[JonasGilg]

All libraries except CEF can be compiled for MinGW. CEF seems to be very difficult, but there might be a workaround using the Windows binaries: https://bitbucket.org/chromiumembedded/cef/issues/1718/add-cross-compilation-support-to-cef#comment-27305080