You’ll find here some information on how the packages are built, how they get installed.

References:

• From Synology
  • Synology Disk Station 3rd-Party Apps Integration
  • Synology DiskStation Manager, 3rd-Party Apps Developer Guide (pdf)
  • Synology Toolchains and other GPL material
• Other Sources
  • Merty’s page on the SPK format, based on his own forum post
  • How to cross compile Python