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/ReadCeresVersionFromSource.cmake b/cmake/ReadCeresVersionFromSource.cmake
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+# Ceres Solver - A fast non-linear least squares minimizer
+# Copyright 2015 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)
+#
+
+# Extract Ceres version from <CERES_SOURCE_ROOT>/include/ceres/version.h
+# so that we only have a single definition of the Ceres version, not two
+# one in the source and one in the CMakeLists.txt.
+macro(read_ceres_version_from_source CERES_SOURCE_ROOT)
+ set(CERES_VERSION_FILE ${CERES_SOURCE_ROOT}/include/ceres/version.h)
+ if (NOT EXISTS ${CERES_VERSION_FILE})
+ message(FATAL_ERROR "Cannot find Ceres version.h file in specified "
+ "Ceres source directory: ${CERES_SOURCE_ROOT}, it is not here: "
+ "${CERES_VERSION_FILE}")
+ endif()
+
+ file(READ ${CERES_VERSION_FILE} CERES_VERSION_FILE_CONTENTS)
+
+ string(REGEX MATCH "#define CERES_VERSION_MAJOR [0-9]+"
+ CERES_VERSION_MAJOR "${CERES_VERSION_FILE_CONTENTS}")
+ string(REGEX REPLACE "#define CERES_VERSION_MAJOR ([0-9]+)" "\\1"
+ CERES_VERSION_MAJOR "${CERES_VERSION_MAJOR}")
+ # NOTE: if (VAR) is FALSE if VAR is numeric and <= 0, as such we cannot use
+ # it for testing version numbers, which might well be zero, at least
+ # for the patch version, hence check for empty string explicitly.
+ if ("${CERES_VERSION_MAJOR}" STREQUAL "")
+ message(FATAL_ERROR "Failed to extract Ceres major version from "
+ "${CERES_VERSION_FILE}")
+ endif()
+
+ string(REGEX MATCH "#define CERES_VERSION_MINOR [0-9]+"
+ CERES_VERSION_MINOR "${CERES_VERSION_FILE_CONTENTS}")
+ string(REGEX REPLACE "#define CERES_VERSION_MINOR ([0-9]+)" "\\1"
+ CERES_VERSION_MINOR "${CERES_VERSION_MINOR}")
+ if ("${CERES_VERSION_MINOR}" STREQUAL "")
+ message(FATAL_ERROR "Failed to extract Ceres minor version from "
+ "${CERES_VERSION_FILE}")
+ endif()
+
+ string(REGEX MATCH "#define CERES_VERSION_REVISION [0-9]+"
+ CERES_VERSION_PATCH "${CERES_VERSION_FILE_CONTENTS}")
+ string(REGEX REPLACE "#define CERES_VERSION_REVISION ([0-9]+)" "\\1"
+ CERES_VERSION_PATCH "${CERES_VERSION_PATCH}")
+ if ("${CERES_VERSION_PATCH}" STREQUAL "")
+ message(FATAL_ERROR "Failed to extract Ceres patch version from "
+ "${CERES_VERSION_FILE}")
+ endif()
+
+ # This is on a single line s/t CMake does not interpret it as a list of
+ # elements and insert ';' separators which would result in 3.;2.;0 nonsense.
+ set(CERES_VERSION "${CERES_VERSION_MAJOR}.${CERES_VERSION_MINOR}.${CERES_VERSION_PATCH}")
+
+ message(STATUS "Detected Ceres version: ${CERES_VERSION} from "
+ "${CERES_VERSION_FILE}")
+endmacro()