Squashed 'third_party/ceres/' content from commit e51e9b4
Change-Id: I763587619d57e594d3fa158dc3a7fe0b89a1743b
git-subtree-dir: third_party/ceres
git-subtree-split: e51e9b46f6ca88ab8b2266d0e362771db6d98067
diff --git a/cmake/CheckIfUnderscorePrefixedBesselFunctionsExist.cmake b/cmake/CheckIfUnderscorePrefixedBesselFunctionsExist.cmake
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+# 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: alexs.mac@gmail.com (Alex Stewart)
+
+# Microsoft deprecated the POSIX Bessel functions: j[0,1,n]() in favour
+# of _j[0,1,n](), it appears since at least MSVC 2005 [1]. This function
+# checks if the underscore prefixed versions of the Bessel functions are
+# defined, and sets ${HAVE_UNDERSCORE_PREFIXED_BESSEL_FUNCTIONS_VAR} to
+# TRUE if they do.
+#
+# [1] https://msdn.microsoft.com/en-us/library/ms235384(v=vs.100).aspx
+function(check_if_underscore_prefixed_bessel_functions_exist
+ HAVE_UNDERSCORE_PREFIXED_BESSEL_FUNCTIONS_VAR)
+ include(CheckCXXSourceCompiles)
+ check_cxx_source_compiles(
+ "#include <math.h>
+ int main(int argc, char * argv[]) {
+ double result;
+ result = _j0(1.2345);
+ result = _j1(1.2345);
+ result = _jn(2, 1.2345);
+ return 0;
+ }"
+ HAVE_UNDERSCORE_PREFIXED_BESSEL_FUNCTIONS)
+ set(${HAVE_UNDERSCORE_PREFIXED_BESSEL_FUNCTIONS_VAR}
+ ${HAVE_UNDERSCORE_PREFIXED_BESSEL_FUNCTIONS}
+ PARENT_SCOPE)
+endfunction()