| # Ceres Solver - A fast non-linear least squares minimizer | |
| # Copyright 2017 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: sergey.vfx@gmail.com (Sergey Sharybin) | |
| function(add_cxx_compiler_flag_if_supported | |
| AGGREGATED_CXX_FLAGS_VAR | |
| FLAG_TO_ADD_IF_SUPPORTED) | |
| include(CheckCXXCompilerFlag) | |
| # Use of whitespace or '-' in variable names (used by CheckCXXSourceCompiles | |
| # as #defines) will trigger errors. | |
| string(STRIP "${FLAG_TO_ADD_IF_SUPPORTED}" FLAG_TO_ADD_IF_SUPPORTED) | |
| # Build an informatively named test result variable so that it will be evident | |
| # which tests were performed/succeeded in the CMake output, e.g for -Wall: | |
| # | |
| # -- Performing Test CHECK_CXX_FLAG_Wall - Success | |
| # | |
| # NOTE: This variable is also used to cache test result. | |
| string(REPLACE "-" "_" CHECK_CXX_FLAG | |
| "CHECK_CXX_FLAG${FLAG_TO_ADD_IF_SUPPORTED}") | |
| check_cxx_compiler_flag(${FLAG_TO_ADD_IF_SUPPORTED} ${CHECK_CXX_FLAG}) | |
| if (${CHECK_CXX_FLAG}) | |
| set(${AGGREGATED_CXX_FLAGS_VAR} | |
| "${${AGGREGATED_CXX_FLAGS_VAR}} ${FLAG_TO_ADD_IF_SUPPORTED}" PARENT_SCOPE) | |
| endif() | |
| endfunction() |