| # Ceres Solver - A fast non-linear least squares minimizer |
| # Copyright 2022 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) |
| |
| # This must take place outside of CONFIGURE_CERES_CONFIG() in order that |
| # we can determine where *this* file is, and thus the relative path to |
| # config.h.in. Inside of CONFIGURE_CERES_CONFIG(), CMAKE_CURRENT_LIST_DIR |
| # refers to the caller of CONFIGURE_CERES_CONFIG(), not this file. |
| set(CERES_CONFIG_IN_FILE "${CMAKE_CURRENT_LIST_DIR}/config.h.in") |
| |
| # CreateCeresConfig.cmake - Create the config.h for Ceres. |
| # |
| # This function configures the Ceres config.h file based on the current |
| # compile options and copies it into the specified location. It should be |
| # called before Ceres is built so that the correct config.h is used when |
| # Ceres is compiled. |
| # |
| # INPUTS: |
| # CURRENT_CERES_COMPILE_OPTIONS: List of currently enabled Ceres compile |
| # options. These are compared against the |
| # full list of valid options, which are read |
| # from config.h.in. Any options present |
| # which are not part of the valid set will |
| # invoke an error. Any valid option present |
| # will be enabled in the resulting config.h, |
| # all other options will be disabled. |
| # |
| # CERES_CONFIG_OUTPUT_DIRECTORY: Path to output directory in which to save |
| # the configured config.h. Typically this |
| # will be <src>/include/ceres/internal. |
| |
| function(CREATE_CERES_CONFIG CURRENT_CERES_COMPILE_OPTIONS CERES_CONFIG_OUTPUT_DIRECTORY) |
| # Create the specified output directory if it does not exist. |
| if (NOT EXISTS "${CERES_CONFIG_OUTPUT_DIRECTORY}") |
| message(STATUS "Creating configured Ceres config.h output directory: " |
| "${CERES_CONFIG_OUTPUT_DIRECTORY}") |
| file(MAKE_DIRECTORY "${CERES_CONFIG_OUTPUT_DIRECTORY}") |
| endif() |
| if (EXISTS "${CERES_CONFIG_OUTPUT_DIRECTORY}" AND |
| NOT IS_DIRECTORY "${CERES_CONFIG_OUTPUT_DIRECTORY}") |
| message(FATAL_ERROR "Ceres Bug: Specified CERES_CONFIG_OUTPUT_DIRECTORY: " |
| "${CERES_CONFIG_OUTPUT_DIRECTORY} exists, but is not a directory.") |
| endif() |
| |
| # Read all possible configurable compile options from config.h.in, this avoids |
| # us having to hard-code in this file what the valid options are. |
| file(READ ${CERES_CONFIG_IN_FILE} CERES_CONFIG_IN_CONTENTS) |
| string(REGEX MATCHALL "@[^@ $]+@" |
| ALL_CONFIGURABLE_CERES_OPTIONS "${CERES_CONFIG_IN_CONTENTS}") |
| # Removing @ symbols at beginning and end of each option. |
| string(REPLACE "@" "" |
| ALL_CONFIGURABLE_CERES_OPTIONS "${ALL_CONFIGURABLE_CERES_OPTIONS}") |
| |
| # Ensure that there are no repetitions in the current compile options. |
| list(REMOVE_DUPLICATES CURRENT_CERES_COMPILE_OPTIONS) |
| |
| foreach (CERES_OPTION ${ALL_CONFIGURABLE_CERES_OPTIONS}) |
| # Try and find the option in the list of current compile options, if it |
| # is present, then the option is enabled, otherwise it is disabled. |
| list(FIND CURRENT_CERES_COMPILE_OPTIONS ${CERES_OPTION} OPTION_ENABLED) |
| |
| # 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 (OPTION_ENABLED GREATER -1) |
| message(STATUS "Enabling ${CERES_OPTION} in Ceres config.h") |
| set(${CERES_OPTION} "#define ${CERES_OPTION}") |
| |
| # Remove the item from the list of current options so that we can identify |
| # any options that were in CURRENT_CERES_COMPILE_OPTIONS, but not in |
| # ALL_CONFIGURABLE_CERES_OPTIONS (which is an error). |
| list(REMOVE_ITEM CURRENT_CERES_COMPILE_OPTIONS ${CERES_OPTION}) |
| else() |
| set(${CERES_OPTION} "// #define ${CERES_OPTION}") |
| endif() |
| endforeach() |
| |
| # CURRENT_CERES_COMPILE_OPTIONS should now be an empty list, any elements |
| # remaining were not present in ALL_CONFIGURABLE_CERES_OPTIONS read from |
| # config.h.in. |
| if (CURRENT_CERES_COMPILE_OPTIONS) |
| message(FATAL_ERROR "Ceres Bug: CURRENT_CERES_COMPILE_OPTIONS contained " |
| "the following options which were not present in config.h.in: " |
| "${CURRENT_CERES_COMPILE_OPTIONS}") |
| endif() |
| |
| configure_file(${CERES_CONFIG_IN_FILE} |
| "${CERES_CONFIG_OUTPUT_DIRECTORY}/config.h" @ONLY) |
| endfunction() |