116 lines
5.8 KiB
CMake
116 lines
5.8 KiB
CMake
# Ceres Solver - A fast non-linear least squares minimizer
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# Copyright 2015 Google Inc. All rights reserved.
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# http://ceres-solver.org/
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# * Redistributions of source code must retain the above copyright notice,
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# this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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# * Neither the name of Google Inc. nor the names of its contributors may be
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# used to endorse or promote products derived from this software without
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# specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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# Author: alexs.mac@gmail.com (Alex Stewart)
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# This must take place outside of CONFIGURE_CERES_CONFIG() in order that
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# we can determine where *this* file is, and thus the relative path to
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# config.h.in. Inside of CONFIGURE_CERES_CONFIG(), CMAKE_CURRENT_LIST_DIR
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# refers to the caller of CONFIGURE_CERES_CONFIG(), not this file.
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set(CERES_CONFIG_IN_FILE "${CMAKE_CURRENT_LIST_DIR}/config.h.in")
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# CreateCeresConfig.cmake - Create the config.h for Ceres.
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#
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# This function configures the Ceres config.h file based on the current
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# compile options and copies it into the specified location. It should be
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# called before Ceres is built so that the correct config.h is used when
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# Ceres is compiled.
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#
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# INPUTS:
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# CURRENT_CERES_COMPILE_OPTIONS: List of currently enabled Ceres compile
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# options. These are compared against the
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# full list of valid options, which are read
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# from config.h.in. Any options present
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# which are not part of the valid set will
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# invoke an error. Any valid option present
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# will be enabled in the resulting config.h,
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# all other options will be disabled.
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#
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# CERES_CONFIG_OUTPUT_DIRECTORY: Path to output directory in which to save
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# the configured config.h. Typically this
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# will be <src>/include/ceres/internal.
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function(CREATE_CERES_CONFIG CURRENT_CERES_COMPILE_OPTIONS CERES_CONFIG_OUTPUT_DIRECTORY)
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# Create the specified output directory if it does not exist.
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if (NOT EXISTS "${CERES_CONFIG_OUTPUT_DIRECTORY}")
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message(STATUS "Creating configured Ceres config.h output directory: "
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"${CERES_CONFIG_OUTPUT_DIRECTORY}")
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file(MAKE_DIRECTORY "${CERES_CONFIG_OUTPUT_DIRECTORY}")
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endif()
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if (EXISTS "${CERES_CONFIG_OUTPUT_DIRECTORY}" AND
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NOT IS_DIRECTORY "${CERES_CONFIG_OUTPUT_DIRECTORY}")
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message(FATAL_ERROR "Ceres Bug: Specified CERES_CONFIG_OUTPUT_DIRECTORY: "
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"${CERES_CONFIG_OUTPUT_DIRECTORY} exists, but is not a directory.")
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endif()
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# Read all possible configurable compile options from config.h.in, this avoids
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# us having to hard-code in this file what the valid options are.
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file(READ ${CERES_CONFIG_IN_FILE} CERES_CONFIG_IN_CONTENTS)
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string(REGEX MATCHALL "@[^@ $]+@"
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ALL_CONFIGURABLE_CERES_OPTIONS "${CERES_CONFIG_IN_CONTENTS}")
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# Removing @ symbols at beginning and end of each option.
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string(REPLACE "@" ""
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ALL_CONFIGURABLE_CERES_OPTIONS "${ALL_CONFIGURABLE_CERES_OPTIONS}")
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# Ensure that there are no repetitions in the current compile options.
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list(REMOVE_DUPLICATES CURRENT_CERES_COMPILE_OPTIONS)
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foreach (CERES_OPTION ${ALL_CONFIGURABLE_CERES_OPTIONS})
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# Try and find the option in the list of current compile options, if it
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# is present, then the option is enabled, otherwise it is disabled.
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list(FIND CURRENT_CERES_COMPILE_OPTIONS ${CERES_OPTION} OPTION_ENABLED)
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# list(FIND ..) returns -1 if the element was not in the list, but CMake
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# interprets if (VAR) to be true if VAR is any non-zero number, even
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# negative ones, hence we have to explicitly check for >= 0.
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if (OPTION_ENABLED GREATER -1)
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message(STATUS "Enabling ${CERES_OPTION} in Ceres config.h")
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set(${CERES_OPTION} "#define ${CERES_OPTION}")
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# Remove the item from the list of current options so that we can identify
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# any options that were in CURRENT_CERES_COMPILE_OPTIONS, but not in
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# ALL_CONFIGURABLE_CERES_OPTIONS (which is an error).
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list(REMOVE_ITEM CURRENT_CERES_COMPILE_OPTIONS ${CERES_OPTION})
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else()
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set(${CERES_OPTION} "// #define ${CERES_OPTION}")
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endif()
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endforeach()
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# CURRENT_CERES_COMPILE_OPTIONS should now be an empty list, any elements
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# remaining were not present in ALL_CONFIGURABLE_CERES_OPTIONS read from
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# config.h.in.
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if (CURRENT_CERES_COMPILE_OPTIONS)
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message(FATAL_ERROR "Ceres Bug: CURRENT_CERES_COMPILE_OPTIONS contained "
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"the following options which were not present in config.h.in: "
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"${CURRENT_CERES_COMPILE_OPTIONS}")
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endif()
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configure_file(${CERES_CONFIG_IN_FILE}
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"${CERES_CONFIG_OUTPUT_DIRECTORY}/config.h" @ONLY)
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endfunction()
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