cmake_minimum_required(VERSION 3.2)


project(mandelbrot_ispc.bin)

set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m64 -g -std=c++11 -O3 -Wall")

INCLUDE_DIRECTORIES(
  ${CMAKE_CURRENT_SOURCE_DIR}/
  ${CMAKE_CURRENT_SOURCE_DIR}/generated/)

set(ISPC_TARGET "host")

if (DEFINED ENV{TRAVIS})
  if( $ENV{TRAVIS} STREQUAL "true")
    message("Setting ISPC Target to AVX on Travis")
    set(ISPC_TARGET "avx1-i32x8")
  endif()
endif()

include_directories(${CMAKE_CURRENT_SOURCE_DIR}/../common/)

MACRO(ISPC_GENERATE header)
  SET(hxxFile "${CMAKE_CURRENT_SOURCE_DIR}/generated/${header}_ispc.h")
  SET(oxxFile "${CMAKE_CURRENT_SOURCE_DIR}/generated/${header}_ispc.o")

  SET(ISPC_GENERATED_FILES ${hxxFile} ${oxxFile})
  message("Generating ISPC files")
  ADD_CUSTOM_TARGET(RunGenerator-${header} DEPENDS ${ISPC_GENERATED_FILES}
    COMMENT "Checking if re-generation is required for ${header}.ispc")

  ADD_DEPENDENCIES(${PROJECT_NAME} RunGenerator-${header})


  
  
  ADD_CUSTOM_COMMAND(
    OUTPUT ${ISPC_GENERATED_FILES}
    COMMAND ispc -O2 --target=${ISPC_TARGET} --arch=x86-64 ${CMAKE_CURRENT_SOURCE_DIR}/${header}.ispc -o ${CMAKE_CURRENT_SOURCE_DIR}/generated/${header}_ispc.o -h ${CMAKE_CURRENT_SOURCE_DIR}/generated/${header}_ispc.h
    DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/${header}.ispc
    COMMENT "Generate database support code for ${header}.ispc")


ENDMACRO()



SET(ISPC_FILES mandelbrot)
SET(OBJS "")

FOREACH(f ${ISPC_FILES})
  LIST(APPEND OBJS ${CMAKE_CURRENT_SOURCE_DIR}/generated/${f}_ispc.o)
ENDFOREACH(f)


add_executable(mandelbrot_ispc.bin ${CMAKE_CURRENT_SOURCE_DIR}/mandelbrotSerial.cpp
                          ${CMAKE_CURRENT_SOURCE_DIR}/../common/ppm.cpp 
                          ${CMAKE_CURRENT_SOURCE_DIR}/../common/tasksys.cpp
                          ${CMAKE_CURRENT_SOURCE_DIR}/main.cpp
			                    ${OBJS}
			  )

target_link_libraries(mandelbrot_ispc.bin pthread m)

SET(GCC_PIC_LINK_FLAGS    "-no-pie")
SET(CMAKE_EXE_LINKER_FLAGS  "${CMAKE_EXE_LINKER_FLAGS} ${GCC_PIC_LINK_FLAGS}")


FOREACH(f ${ISPC_FILES})
  ISPC_GENERATE(${f})
ENDFOREACH(f)


SET_SOURCE_FILES_PROPERTIES(
  ${OBJS}
  PROPERTIES
  EXTERNAL_OBJECT true
  GENERATED true
  )