SWI-Prolog -- API-function PL_version

Documentation
- Reference manual
  - Foreign Language Interface
    - The Foreign Include File
      - Environment Control from Foreign Code
        
        PL_action()
        
        PL_version_info()
- Packages

Availability:C-language interface function

unsigned int PL_version_info(int key)

Query version information. This function may be called before PL_initialise(). If the key is unknown the function returns 0. See section 2.21 for a more in-depth discussion on binary compatibility. Versions upto SWI-Prolog 8.5.2 defined this function as PL_version(). It was renamed to avoid a conflict with Perl affecting Yaswi. PL_version() is provided as a macro for compatibility. Defined keys are:

PL_VERSION_SYSTEM: SWI-Prolog version as 10,000 × major + 100 × minor + patch.
PL_VERSION_FLI: Incremented if the foreign interface defined in this chapter changes in a way that breaks backward compatibility.
PL_VERSION_REC: Incremented if the binary representation of terms as used by PL_record_external() and fast_write/2 changes.
PL_VERSION_QLF: Incremented if the QLF file format changes.
PL_VERSION_QLF_LOAD: Represents the oldest loadable QLF file format version.
PL_VERSION_VM: A hash that represents the VM instructions and their arguments.
PL_VERSION_BUILT_IN: A hash that represents the names, arities and properties of all built-in predicates defined in C. If this function is called before PL_initialise() it returns 0.