1 # Ceres Solver - A fast non-linear least squares minimizer 2 # Copyright 2014 Google Inc. All rights reserved. 3 # http://code.google.com/p/ceres-solver/ 4 # 5 # Redistribution and use in source and binary forms, with or without 6 # modification, are permitted provided that the following conditions are met: 7 # 8 # * Redistributions of source code must retain the above copyright notice, 9 # this list of conditions and the following disclaimer. 10 # * Redistributions in binary form must reproduce the above copyright notice, 11 # this list of conditions and the following disclaimer in the documentation 12 # and/or other materials provided with the distribution. 13 # * Neither the name of Google Inc. nor the names of its contributors may be 14 # used to endorse or promote products derived from this software without 15 # specific prior written permission. 16 # 17 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 18 # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 # ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 21 # LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 # POSSIBILITY OF SUCH DAMAGE. 28 # 29 # Author: alexs.mac (a] gmail.com (Alex Stewart) 30 31 # This must take place outside of CONFIGURE_CERES_CONFIG() in order that 32 # we can determine where *this* file is, and thus the relative path to 33 # config.h.in. Inside of CONFIGURE_CERES_CONFIG(), CMAKE_CURRENT_LIST_DIR 34 # refers to the caller of CONFIGURE_CERES_CONFIG(), not this file. 35 SET(CERES_CONFIG_IN_FILE "${CMAKE_CURRENT_LIST_DIR}/config.h.in") 36 37 # CreateCeresConfig.cmake - Create the config.h for Ceres. 38 # 39 # This function configures the Ceres config.h file based on the current 40 # compile options and copies it into the specified location. It should be 41 # called before Ceres is built so that the correct config.h is used when 42 # Ceres is compiled. 43 # 44 # INPUTS: 45 # CURRENT_CERES_COMPILE_OPTIONS: List of currently enabled Ceres compile 46 # options. These are compared against the 47 # full list of valid options, which are read 48 # from config.h.in. Any options present 49 # which are not part of the valid set will 50 # invoke an error. Any valid option present 51 # will be enabled in the resulting config.h, 52 # all other options will be disabled. 53 # 54 # CERES_CONFIG_OUTPUT_DIRECTORY: Path to output directory in which to save 55 # the configured config.h. Typically this 56 # will be <src>/include/ceres/internal. 57 58 FUNCTION(CREATE_CERES_CONFIG CURRENT_CERES_COMPILE_OPTIONS CERES_CONFIG_OUTPUT_DIRECTORY) 59 # Create the specified output directory if it does not exist. 60 IF (NOT EXISTS "${CERES_CONFIG_OUTPUT_DIRECTORY}") 61 MESSAGE(STATUS "Creating configured Ceres config.h output directory: " 62 "${CERES_CONFIG_OUTPUT_DIRECTORY}") 63 FILE(MAKE_DIRECTORY "${CERES_CONFIG_OUTPUT_DIRECTORY}") 64 ENDIF() 65 IF (EXISTS "${CERES_CONFIG_OUTPUT_DIRECTORY}" AND 66 NOT IS_DIRECTORY "${CERES_CONFIG_OUTPUT_DIRECTORY}") 67 MESSAGE(FATAL_ERROR "Ceres Bug: Specified CERES_CONFIG_OUTPUT_DIRECTORY: " 68 "${CERES_CONFIG_OUTPUT_DIRECTORY} exists, but is not a directory.") 69 ENDIF() 70 71 # Read all possible configurable compile options from config.h.in, this avoids 72 # us having to hard-code in this file what the valid options are. 73 FILE(READ ${CERES_CONFIG_IN_FILE} CERES_CONFIG_IN_CONTENTS) 74 STRING(REGEX MATCHALL "@[^@ $]+@" 75 ALL_CONFIGURABLE_CERES_OPTIONS "${CERES_CONFIG_IN_CONTENTS}") 76 # Removing @ symbols at beginning and end of each option. 77 STRING(REPLACE "@" "" 78 ALL_CONFIGURABLE_CERES_OPTIONS "${ALL_CONFIGURABLE_CERES_OPTIONS}") 79 80 # Ensure that there are no repetitions in the current compile options. 81 LIST(REMOVE_DUPLICATES CURRENT_CERES_COMPILE_OPTIONS) 82 83 FOREACH (CERES_OPTION ${ALL_CONFIGURABLE_CERES_OPTIONS}) 84 # Try and find the option in the list of current compile options, if it 85 # is present, then the option is enabled, otherwise it is disabled. 86 LIST(FIND CURRENT_CERES_COMPILE_OPTIONS ${CERES_OPTION} OPTION_ENABLED) 87 88 # list(FIND ..) returns -1 if the element was not in the list, but CMake 89 # interprets if (VAR) to be true if VAR is any non-zero number, even 90 # negative ones, hence we have to explicitly check for >= 0. 91 IF (OPTION_ENABLED GREATER -1) 92 MESSAGE(STATUS "Enabling ${CERES_OPTION} in Ceres config.h") 93 SET(${CERES_OPTION} "#define ${CERES_OPTION}") 94 95 # Remove the item from the list of current options so that we can identify 96 # any options that were in CURRENT_CERES_COMPILE_OPTIONS, but not in 97 # ALL_CONFIGURABLE_CERES_OPTIONS (which is an error). 98 LIST(REMOVE_ITEM CURRENT_CERES_COMPILE_OPTIONS ${CERES_OPTION}) 99 ELSE() 100 SET(${CERES_OPTION} "// #define ${CERES_OPTION}") 101 ENDIF() 102 ENDFOREACH() 103 104 # CURRENT_CERES_COMPILE_OPTIONS should now be an empty list, any elements 105 # remaining were not present in ALL_CONFIGURABLE_CERES_OPTIONS read from 106 # config.h.in. 107 IF (CURRENT_CERES_COMPILE_OPTIONS) 108 MESSAGE(FATAL_ERROR "Ceres Bug: CURRENT_CERES_COMPILE_OPTIONS contained " 109 "the following options which were not present in config.h.in: " 110 "${CURRENT_CERES_COMPILE_OPTIONS}") 111 ENDIF() 112 113 CONFIGURE_FILE(${CERES_CONFIG_IN_FILE} 114 "${CERES_CONFIG_OUTPUT_DIRECTORY}/config.h" @ONLY) 115 ENDFUNCTION() 116
