cmake_minimum_required(VERSION 3.22.1)
project(extract_cuda)

#We can assume that 'parent' has guarded us with find_package(XxxxXX) + if(XXXXXX_FOUND)

set(JEXTRACT_PACKAGE cuda)
set(JEXTRACT_SOURCE ${CMAKE_SOURCE_DIR}/${JEXTRACT_PACKAGE}/src/main/java)
set(JEXTRACT_HEADER ${JEXTRACT_SOURCE}/${JEXTRACT_PACKAGE}/${JEXTRACT_PACKAGE}_h.java)
#get_cmake_property(_variableNames VARIABLES)
#foreach (_variableName ${_variableNames})
#    message(STATUS "${_variableName}=${${_variableName}}")
#endforeach()

if (Apple)

else()
add_custom_command(OUTPUT  ${JEXTRACT_HEADER}
   COMMAND mkdir -p ${JEXTRACT_SOURCE}
   COMMAND jextract
       --target-package ${JEXTRACT_PACKAGE}
       --output ${JEXTRACT_SOURCE}
       --library :${CUDA_cuda_driver_LIBRARY}
       --header-class-name ${JEXTRACT_PACKAGE}_h
       ${CUDAToolkit_INCLUDE_DIRS}/cuda.h   #  Note that iexpected  ${CUDAToolkit_INCLUDE_DIR}/cuda.h to work
       WORKING_DIRECTORY "${CMAKE_BINARY_DIR}"
       VERBATIM
   )
endif()

add_custom_target(extract_cuda DEPENDS  ${JEXTRACT_HEADER})