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# Ceres Solver - A fast non-linear least squares minimizer
# Copyright 2018 Google Inc. All rights reserved.
# http://ceres-solver.org/
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
# * Neither the name of Google Inc. nor the names of its contributors may be
# used to endorse or promote products derived from this software without
# specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
# Author: alexs.mac@gmail.com (Alex Stewart)
# Ordered by expected preference.
set(CERES_THREADING_MODELS "CXX_THREADS;OPENMP;NO_THREADS")
function(find_available_ceres_threading_models CERES_THREADING_MODELS_AVAILABLE_VAR)
set(CERES_THREADING_MODELS_AVAILABLE ${CERES_THREADING_MODELS})
# Remove any threading models for which the dependencies are not available.
find_package(OpenMP QUIET)
if (NOT OPENMP_FOUND)
list(REMOVE_ITEM CERES_THREADING_MODELS_AVAILABLE "OPENMP")
endif()
if (NOT CERES_THREADING_MODELS_AVAILABLE)
# At least NO_THREADS should never be removed. This check is purely
# protective against future threading model updates.
message(FATAL_ERROR "Ceres bug: Removed all threading models.")
endif()
set(${CERES_THREADING_MODELS_AVAILABLE_VAR}
${CERES_THREADING_MODELS_AVAILABLE} PARENT_SCOPE)
endfunction()
macro(set_ceres_threading_model_to_cxx11_threads)
list(APPEND CERES_COMPILE_OPTIONS CERES_USE_CXX_THREADS)
endmacro()
macro(set_ceres_threading_model_to_openmp)
find_package(OpenMP REQUIRED)
list(APPEND CERES_COMPILE_OPTIONS CERES_USE_OPENMP)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${OpenMP_C_FLAGS}")
endmacro()
macro(set_ceres_threading_model_to_no_threads)
list(APPEND CERES_COMPILE_OPTIONS CERES_NO_THREADS)
endmacro()
macro(set_ceres_threading_model CERES_THREADING_MODEL_TO_SET)
if ("${CERES_THREADING_MODEL_TO_SET}" STREQUAL "CXX_THREADS")
set_ceres_threading_model_to_cxx11_threads()
elseif ("${CERES_THREADING_MODEL_TO_SET}" STREQUAL "OPENMP")
set_ceres_threading_model_to_openmp()
elseif ("${CERES_THREADING_MODEL_TO_SET}" STREQUAL "NO_THREADS")
set_ceres_threading_model_to_no_threads()
else()
include(PrettyPrintCMakeList)
find_available_ceres_threading_models(_AVAILABLE_THREADING_MODELS)
pretty_print_cmake_list(
_AVAILABLE_THREADING_MODELS ${_AVAILABLE_THREADING_MODELS})
message(FATAL_ERROR "Unknown threading model specified: "
"'${CERES_THREADING_MODEL_TO_SET}'. Available threading models for "
"this platform are: ${_AVAILABLE_THREADING_MODELS}")
endif()
message("-- Using Ceres threading model: ${CERES_THREADING_MODEL_TO_SET}")
endmacro()