FindSWIGΒΆ
Find the Simplified Wrapper and Interface Generator (SWIG) executable.
This module finds an installed SWIG and determines its version.
Added in version 3.18: If a COMPONENTS or OPTIONAL_COMPONENTS argument is given to the
find_package() command, it will also determine supported target
languages.
Added in version 3.19: When a version is requested, it can be specified as a simple value or as a
range. For a detailed description of version range usage and capabilities,
refer to the find_package() command.
The module defines the following variables:
- SWIG_FOUND
- Whether SWIG and any required components were found on the system. 
- SWIG_EXECUTABLE
- Path to the SWIG executable. 
- SWIG_DIR
- Path to the installed SWIG - Libdirectory (result of- swig -swiglib).
- SWIG_VERSION
- SWIG executable version (result of - swig -version).
- SWIG_<lang>_FOUND
- If - COMPONENTSor- OPTIONAL_COMPONENTSare requested, each available target language- <lang>(lowercase) will be set to TRUE.
Any COMPONENTS given to find_package should be the names of supported
target languages as provided to the LANGUAGE argument of swig_add_library,
such as python or perl5. Language names must be lowercase.
All information is collected from the SWIG_EXECUTABLE, so the version
to be found can be changed from the command line by means of setting
SWIG_EXECUTABLE.
Example usage requiring SWIG 4.0 or higher and Python language support, with optional Fortran support:
find_package(SWIG 4.0 COMPONENTS python OPTIONAL_COMPONENTS fortran)
if(SWIG_FOUND)
  message("SWIG found: ${SWIG_EXECUTABLE}")
  if(NOT SWIG_fortran_FOUND)
    message(WARNING "SWIG Fortran bindings cannot be generated")
  endif()
endif()
