in vsconfigs there are configurations that can be imported in the Visual Studio Installer. Click More->Import Configuration and pick the one matching the VS version. This should install everything required in the VS installer, everything else still need to be installed manually

• git
• perl
• windows driver kit (wdk)
• jdk (Use SE 8 from oracle, using AdoptOpenJDK produced a build that didn't work)
• ant
• windows sdk 10.0.17763.0
• cmake 3.16 or higher

• c++ development and universal development workloads
• atl
• mfc
• build tools for x86, x64, arm, arm64

• c++ development and universal development workloads
• atl
• atl spectre mitigations
• mfc
• mfc spectre mitigrations
• build tools for x86, x64, arm, arm64
• crt libraries with spectre mitigations

Run DoRelease.ps1 -App -Desktop in a powershell window. It will clean any previous builds, build libraries that require a debug build in debug, build all libraries as RelWithDebInfo for every platform and then package them. It takes a while to run.

If no errors occured libraries are now available in the package folder and ready to be uploaded to ftp.

1. open CMakeLists.txt
2. add the following template and add the missing values
   • DOWNLOAD_NAME, BUILD_COMMAND is not needed in most cases and can be removed
   • If the package has dependencies add them at DEPENDS otherwise remove the line For every dependency you need to add %3B%3B${PREFIX}/<DEPENDS-NAME> at the end of CMAKE_INSTALL_PREFIX
   • The prefered way is to point to a git repo with patches. The convention is to create a branch named kodi with the patches. Using git repos is easier when iterating during development as cmake will fetch a new tag and regenerate the project. When using a patch, you have to manually delete the directory for cmake to apply the patch again.
   • If the source code needs to be patched save the patch at patches/<NAME>.diff otherwise remove the line
   • Additionally cmake arguments can be added after CMAKE_INSTALL_PREFIX

ExternalProject_Add(<NAME>
  DEPENDS <DEPENDS>
  GIT_REPOSITORY <URL>
  GIT_TAG <sha1>
  GIT_SHALLOW ON
  BUILD_COMMAND <BUILD-COMMAND>
  CMAKE_ARGS
    ${ADDITIONAL_ARGS}
    -DCMAKE_INSTALL_PREFIX:PATH=${INSTALL_PREFIX}
)

ExternalProject_Add(<NAME>
  DOWNLOAD_NAME <DOWNLOAD_NAME>
  DEPENDS <DEPENDS>
  DOWNLOAD_DIR ${CMAKE_SOURCE_DIR}/downloads
  URL <URL>
  URL_HASH SHA256=<SHA256-HASH>
  PATCH_COMMAND ${PATCH} -p1 -i ${CMAKE_SOURCE_DIR}/patches/$(TargetName).diff
  BUILD_COMMAND <BUILD-COMMAND>
  CMAKE_ARGS
    ${ADDITIONAL_ARGS}
    -DCMAKE_INSTALL_PREFIX:PATH=${INSTALL_PREFIX}
)

1. open CMakeLists.txt
2. update the corresponding ExternalProject_Add and patches/<NAME>.diff