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@gmail.com (Alex Stewart) 30 31# By default, there is no easy way in CMake to set the value of a cache 32# variable without reinitialising it, which involves resetting its 33# associated help string. This is particularly annoying for CMake options 34# where they need to programmatically updated. 35# 36# This function automates this process by getting the current help string 37# for the cache variable to update, then reinitialising it with the new 38# value, but with the original help string. 39FUNCTION(UPDATE_CACHE_VARIABLE VAR_NAME VALUE) 40 GET_PROPERTY(HELP_STRING CACHE ${VAR_NAME} PROPERTY HELPSTRING) 41 GET_PROPERTY(VAR_TYPE CACHE ${VAR_NAME} PROPERTY TYPE) 42 SET(${VAR_NAME} ${VALUE} CACHE ${VAR_TYPE} "${HELP_STRING}" FORCE) 43ENDFUNCTION() 44