CMakeLists.txt

PROJECT(range_lib)

# cmake_minimum_required(VERSION 2.8.0)
cmake_minimum_required(VERSION 3.3)

file(GLOB SRCS 
	main.cpp 
	"vendor/lodepng/lodepng.cpp" )

option(WITH_CUDA "Compile CUDA ray cast varients" ON)
# set(CHUNK_SIZE 16384)
# set(CHUNK_THREADS 256)
set(CHUNK_SIZE 262144)
set(CHUNK_THREADS 256)
# set(CHUNK_SIZE 65536)
# set(CHUNK_THREADS 256)


set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin")
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib")
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib")
set(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake)

SET(BASEPATH "${CMAKE_SOURCE_DIR}") 
add_definitions ( -DBASEPATH=${BASEPATH} )
add_subdirectory(${BASEPATH}/vendor/gflags)

# Use the basepath as a search location for includes
include_directories(${BASEPATH})

include(CheckCXXCompilerFlag)
CHECK_CXX_COMPILER_FLAG("-std=c++11" COMPILER_SUPPORTS_CXX11)
CHECK_CXX_COMPILER_FLAG("-std=c++0x" COMPILER_SUPPORTS_CXX0X)
if(COMPILER_SUPPORTS_CXX11)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
elseif(COMPILER_SUPPORTS_CXX0X)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++0x")
else()
        message(STATUS "The compiler ${CMAKE_CXX_COMPILER} has no C++11 support. Please use a different C++ compiler.")
endif()

# set(CMAKE_CXX_FLAGS "-march=native -fverbose-asm -ffast-math -fno-math-errno -g -save-temps ${CMAKE_CXX_FLAGS}")
# set(CMAKE_CXX_FLAGS "-march=native -ffast-math -fno-math-errno -g -rdynamic -save-temps ${CMAKE_CXX_FLAGS}")
set(CMAKE_CXX_FLAGS "-march=native -ffast-math -fno-math-errno ${CMAKE_CXX_FLAGS} -O3")
# set(CMAKE_CXX_FLAGS "-fverbose-asm -ffast-math -fno-math-errno -save-temps ${CMAKE_CXX_FLAGS}")
# set(CMAKE_CXX_FLAGS "-g -save-temps ${CMAKE_CXX_FLAGS}")

set(CMAKE_BUILD_TYPE Release)

if (WITH_CUDA)
	add_definitions(-DUSE_CUDA=1)
	add_definitions(-DCHUNK_SIZE=${CHUNK_SIZE})
	add_definitions(-DNUM_THREADS=${CHUNK_THREADS})

	file(GLOB CUDA_SRCS 
		main.cpp 
		"includes/kernels.cu"
		"vendor/lodepng/lodepng.cpp" )

	# set(CUDA_TOOLKIT_ROOT_DIR "/usr/local/cuda-7.5")
	find_package(CUDA REQUIRED)

	cuda_add_executable(range_lib ${CUDA_SRCS})
	# message(${CUDA_VERSION})

else()
	add_definitions(-DUSE_CUDA=0)
	add_executable(range_lib ${SRCS})
endif()


target_link_libraries(range_lib gflags pthread)