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Diffstat (limited to 'cmake/CreateCeresConfig.cmake')
| -rw-r--r-- | cmake/CreateCeresConfig.cmake | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/cmake/CreateCeresConfig.cmake b/cmake/CreateCeresConfig.cmake new file mode 100644 index 0000000..23f449b --- /dev/null +++ b/cmake/CreateCeresConfig.cmake @@ -0,0 +1,115 @@ +# Ceres Solver - A fast non-linear least squares minimizer +# Copyright 2014 Google Inc. All rights reserved. +# http://code.google.com/p/ceres-solver/ +# +# 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() |