############################################################################

# Copyright (c) 2016, Johan Mabille, Sylvain Corlay and Wolf Vollprecht #

# #

# Distributed under the terms of the BSD 3-Clause License. #

# #

# The full license is in the file LICENSE, distributed with this software. #

############################################################################

#

# Original version of this file:

# https://github.com/xtensor-stack/xtensor/blob/master/test/CMakeLists.txt

# commit e25330a7fe7a303c65b97ac3792a0ff934712551

#

# Adaptation from GoogleTest to Google Benchmark:

# Copyright (c) 2017, Patrick Bos

#

############################################################################

cmake_minimum_required(VERSION 3.29)

if (CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)

project(xtensor-fftw-bench)

find_package(xtensor REQUIRED CONFIG)

set(XTENSOR_INCLUDE_DIR ${xtensor_INCLUDE_DIRS})

endif ()

if (CMAKE_BUILD_TYPE STREQUAL "Debug")

message(STATUS "Building benchmarks in Debug mode will give suboptimal performance.")

endif ()

include(CheckCXXCompilerFlag)

#string(TOUPPER "${CMAKE_BUILD_TYPE}" U_CMAKE_BUILD_TYPE)

set(CMAKE_CXX_STANDARD 20)

#if (CMAKE_CXX_COMPILER_ID MATCHES "Clang" OR CMAKE_CXX_COMPILER_ID MATCHES "GNU" OR CMAKE_CXX_COMPILER_ID MATCHES "Intel")

# add_compile_options(-march=native) #-Wunused-parameter -Wextra -Wreorder -Wconversion)

#endif()

#

#if(MSVC)

# add_compile_options(/EHsc /MP /bigobj)

# set(CMAKE_EXE_LINKER_FLAGS /MANIFEST:NO)

# foreach(flag_var

# CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE

# CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)

# string(REPLACE "/MD" "-MT" ${flag_var} "${${flag_var}}")

# endforeach()

#endif()

#if (UNIX AND NOT APPLE AND CMAKE_CXX_COMPILER_ID MATCHES "Clang")

# add_compile_options(-stdlib=libstdc++)

#endif()

if(DOWNLOAD_GBENCH OR GBENCH_SRC_DIR)

if(DOWNLOAD_GBENCH)

# Download and unpack google benchmark at configure time

configure_file(downloadGBench.cmake.in googlebench-download/CMakeLists.txt)

else()

# Copy local source of google benchmark at configure time

configure_file(copyGBench.cmake.in googlebench-download/CMakeLists.txt)

endif()

execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .

RESULT_VARIABLE result

WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/googlebench-download )

if(result)

message(FATAL_ERROR "CMake step for googlebench failed: ${result}")

endif()

execute_process(COMMAND ${CMAKE_COMMAND} --build .

RESULT_VARIABLE result

WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/googlebench-download )

if(result)

message(FATAL_ERROR "Build step for googlebench failed: ${result}")

endif()

# Add google benchmark directly to our build. This defines

# the benchmark target.

add_subdirectory(${CMAKE_CURRENT_BINARY_DIR}/googlebench-src

${CMAKE_CURRENT_BINARY_DIR}/googlebench-build)

set(benchmark_INCLUDE_DIRS "${CMAKE_CURRENT_BINARY_DIR}/googlebench-src/include")

set(benchmark_BOTH_LIBRARIES benchmark)

else()

find_package(benchmark REQUIRED)

endif()

find_package(Threads)

include_directories(${XTENSOR_INCLUDE_DIR})

include_directories(${xtl_INCLUDE_DIRS})

include_directories(${XTENSOR_FFTW_INCLUDE_DIR})

include_directories(${benchmark_INCLUDE_DIRS})

set(XTENSOR_FFTW_BENCHMARKS

basic_interface.cpp

)

set(XTENSOR_FFTW_TARGET benchmark_xtensor-fftw)

add_executable(${XTENSOR_FFTW_TARGET} ${XTENSOR_FFTW_BENCHMARKS} ${XTENSOR_HEADERS} ${XTENSOR_FFTW_HEADERS})

if(DOWNLOAD_GBENCH OR GBENCH_SRC_DIR)

add_dependencies(${XTENSOR_FFTW_TARGET} benchmark)

endif()

target_link_libraries(${XTENSOR_FFTW_TARGET} ${benchmark_BOTH_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT} ${FFTW_LINK_FLAGS})

add_custom_target(xbench COMMAND benchmark_xtensor-fftw DEPENDS ${XTENSOR_FFTW_TARGET})