Download and Install Qt: (version: 5.15.2 or Qt6)

http://qt-project.org/downloads
You may use the Qt's mingw version.

Download and Install CMake (Version 3.25.1)

http://www.cmake.org/cmake/resources/software.html

Download and Install Git:

https://git-scm.com/downloads

Download and Extract Boost: (version: 1.81.0)

http://www.boost.org/

Download and install DirectXSDK:

http://www.microsoft.com/en-us/download/details.aspx?id=6812
https://archive.org/download/dx81sdk_full/dx81sdk_full.exe

Clone the QtMeshEditor repository:

git clone https://github.com/fernandotonon/QtMeshEditor.git

Clone the Ogre repository: (v. 13.5.3)

git clone https://github.com/OGRECave/ogre.git

Clone the Ogre Procedural:

git clone https://github.com/OGRECave/ogre-procedural.git

Clone the Assimp repository:

git clone https://github.com/assimp/assimp.git

Verify GCC Version, if it is not right try reinstalling it or ask for help :)

Tip: use the one provided by Qt

Build Boost (Windows)

bootstrap.bat mingw
b2 toolset=gcc variant=release -j4
wait some time :)

Add BOOST_ROOT to the system environment variables

BOOST_ROOT=C:/Boost (for windows)

Build Assimp

Configure and Generate using CMake
mingw32-make install

Add ASSIMP_HOME to the system environment variables

ASSIMP_HOME=C:/Program Files (x86)/Assimp (for windows, or the path configured in the CMAKE_INSTALL_PREFIX)	

Build Ogre

Open CMake
Drag and Drop CMakeLists.txt to CMake GUI
For Linux, set OGRE_GLSUPPORT_USE_EGL to FALSE (it craches on trying to use multiple viewports)
Press Configure
Select MingW Compiler
Make sure the Assimp_DIR is configured (C:/Assimp/lib/cmake/assimp-5.2)
Complete all NOTFOUND components that are essential (You may ask for help if you don't know how to do this step)
Press Generate
mingw32-make install

Build Ogre Procedural

Add OgreProcedural_HOME to the system environment variables

Build QtMeshEditor