Tests/FindPython/VirtualEnv/VirtualEnvDefault.cmake - third_party/github.com/Kitware/CMake - Git at Google


 find_package (Python3 REQUIRED)

 if (NOT Python3_EXECUTABLE MATCHES "^${PYTHON3_VIRTUAL_ENV}/.+")
   message (FATAL_ERROR "Fail to use virtual environment")
 endif()

	find_package (Python3 REQUIRED)

	if (NOT Python3_EXECUTABLE MATCHES "^${PYTHON3_VIRTUAL_ENV}/.+")
	message (FATAL_ERROR "Fail to use virtual environment")
	endif()