Squashed 'third_party/ceres/' content from commit e51e9b4
Change-Id: I763587619d57e594d3fa158dc3a7fe0b89a1743b
git-subtree-dir: third_party/ceres
git-subtree-split: e51e9b46f6ca88ab8b2266d0e362771db6d98067
diff --git a/cmake/CeresCompileOptionsToComponents.cmake b/cmake/CeresCompileOptionsToComponents.cmake
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+# Ceres Solver - A fast non-linear least squares minimizer
+# Copyright 2016 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.
+#
+# Authors: alexs.mac@gmail.com (Alex Stewart)
+#
+
+# Conditionally add a value to the output list based on whether the specified
+# value is found in the input list.
+function(update_output_if_found INPUT_LIST_VAR OUTPUT_LIST_VAR ITEM_TO_FIND VAR_TO_COPY_IF_FOUND VAR_TO_COPY_IF_NOT_FOUND)
+ list(FIND ${INPUT_LIST_VAR} "${ITEM_TO_FIND}" HAVE_ITEM)
+ # list(FIND ..) returns -1 if the element was not in the list, but CMake
+ # interprets if (VAR) to be true if VAR is any non-zero number, even
+ # negative ones, hence we have to explicitly check for >= 0.
+ if (HAVE_ITEM GREATER -1)
+ list(APPEND ${OUTPUT_LIST_VAR} "${VAR_TO_COPY_IF_FOUND}")
+ else()
+ list(APPEND ${OUTPUT_LIST_VAR} "${VAR_TO_COPY_IF_NOT_FOUND}")
+ endif()
+ set(${OUTPUT_LIST_VAR} ${${OUTPUT_LIST_VAR}} PARENT_SCOPE)
+endfunction()
+
+# Helpers for update_output_if_found() to improve legibility when dealing with
+# USE_XXX & NO_XXX option types in ceres_compile_options_to_components().
+macro(add_to_output_if_found INPUT_LIST_VAR OUTPUT_LIST_VAR ITEM_TO_FIND VAR_TO_COPY_IF_FOUND)
+ update_output_if_found(${INPUT_LIST_VAR}
+ ${OUTPUT_LIST_VAR}
+ "${ITEM_TO_FIND}"
+ "${VAR_TO_COPY_IF_FOUND}"
+ "") # Copy nothing if not found.
+endmacro()
+
+macro(add_to_output_if_not_found INPUT_LIST_VAR OUTPUT_LIST_VAR ITEM_TO_FIND VAR_TO_COPY_IF_NOT_FOUND)
+ update_output_if_found(${INPUT_LIST_VAR}
+ ${OUTPUT_LIST_VAR}
+ "${ITEM_TO_FIND}"
+ "" # Copy nothing if found
+ "${VAR_TO_COPY_IF_NOT_FOUND}")
+endmacro()
+
+# Convert the Ceres compile options specified by: CURRENT_CERES_COMPILE_OPTIONS
+# into the corresponding list of Ceres components (names), which may be used in:
+# find_package(Ceres COMPONENTS <XXX>).
+function(ceres_compile_options_to_components CURRENT_CERES_COMPILE_OPTIONS CERES_COMPONENTS_VAR)
+ # To enable users to specify that they want *a* sparse linear algebra backend
+ # without having to specify explicitly which one, for each sparse library we
+ # add the 'meta-module': SparseLinearAlgebraLibrary in addition to their own
+ # module name.
+ add_to_output_if_found(CURRENT_CERES_COMPILE_OPTIONS ${CERES_COMPONENTS_VAR}
+ CERES_USE_EIGEN_SPARSE "EigenSparse;SparseLinearAlgebraLibrary")
+ add_to_output_if_not_found(CURRENT_CERES_COMPILE_OPTIONS ${CERES_COMPONENTS_VAR}
+ CERES_NO_LAPACK "LAPACK")
+ add_to_output_if_not_found(CURRENT_CERES_COMPILE_OPTIONS ${CERES_COMPONENTS_VAR}
+ CERES_NO_SUITESPARSE "SuiteSparse;SparseLinearAlgebraLibrary")
+ add_to_output_if_not_found(CURRENT_CERES_COMPILE_OPTIONS ${CERES_COMPONENTS_VAR}
+ CERES_NO_CXSPARSE "CXSparse;SparseLinearAlgebraLibrary")
+ add_to_output_if_not_found(CURRENT_CERES_COMPILE_OPTIONS ${CERES_COMPONENTS_VAR}
+ CERES_NO_ACCELERATE_SPARSE "AccelerateSparse;SparseLinearAlgebraLibrary")
+ add_to_output_if_not_found(CURRENT_CERES_COMPILE_OPTIONS ${CERES_COMPONENTS_VAR}
+ CERES_RESTRICT_SCHUR_SPECIALIZATION "SchurSpecializations")
+ add_to_output_if_found(CURRENT_CERES_COMPILE_OPTIONS ${CERES_COMPONENTS_VAR}
+ CERES_USE_OPENMP "OpenMP;Multithreading")
+ # Remove duplicates of SparseLinearAlgebraLibrary if multiple sparse backends
+ # are present.
+ list(REMOVE_DUPLICATES ${CERES_COMPONENTS_VAR})
+ set(${CERES_COMPONENTS_VAR} "${${CERES_COMPONENTS_VAR}}" PARENT_SCOPE)
+endfunction()