# 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)
#
# FindGlog.cmake - Find Google glog logging library.
#
# This module defines the following variables:
#
# GLOG_FOUND: TRUE iff glog is found.
# GLOG_INCLUDE_DIRS: Include directories for glog.
# GLOG_LIBRARIES: Libraries required to link glog.
# FOUND_INSTALLED_GLOG_CMAKE_CONFIGURATION: True iff the version of glog found
# was built & installed / exported
# as a CMake package.
#
# The following variables control the behaviour of this module:
#
# GLOG_PREFER_EXPORTED_GLOG_CMAKE_CONFIGURATION: TRUE/FALSE, iff TRUE then
# then prefer using an exported CMake configuration
# generated by glog > 0.3.4 over searching for the
# glog components manually. Otherwise (FALSE)
# ignore any exported glog CMake configurations and
# always perform a manual search for the components.
# Default: TRUE iff user does not define this variable
# before we are called, and does NOT specify either
# GLOG_INCLUDE_DIR_HINTS or GLOG_LIBRARY_DIR_HINTS
# otherwise FALSE.
# GLOG_INCLUDE_DIR_HINTS: List of additional directories in which to
# search for glog includes, e.g: /timbuktu/include.
# GLOG_LIBRARY_DIR_HINTS: List of additional directories in which to
# search for glog libraries, e.g: /timbuktu/lib.
#
# The following variables are also defined by this module, but in line with
# CMake recommended FindPackage() module style should NOT be referenced directly
# by callers (use the plural variables detailed above instead). These variables
# do however affect the behaviour of the module via FIND_[PATH/LIBRARY]() which
# are NOT re-called (i.e. search for library is not repeated) if these variables
# are set with valid values _in the CMake cache_. This means that if these
# variables are set directly in the cache, either by the user in the CMake GUI,
# or by the user passing -DVAR=VALUE directives to CMake when called (which
# explicitly defines a cache variable), then they will be used verbatim,
# bypassing the HINTS variables and other hard-coded search locations.
#
# GLOG_INCLUDE_DIR: Include directory for glog, not including the
# include directory of any dependencies.
# GLOG_LIBRARY: glog library, not including the libraries of any
# dependencies.
# Reset CALLERS_CMAKE_FIND_LIBRARY_PREFIXES to its value when
# FindGlog was invoked.
macro(GLOG_RESET_FIND_LIBRARY_PREFIX)
if (MSVC AND CALLERS_CMAKE_FIND_LIBRARY_PREFIXES)
set(CMAKE_FIND_LIBRARY_PREFIXES "${CALLERS_CMAKE_FIND_LIBRARY_PREFIXES}")
endif()
endmacro(GLOG_RESET_FIND_LIBRARY_PREFIX)
# Called if we failed to find glog or any of it's required dependencies,
# unsets all public (designed to be used externally) variables and reports
# error message at priority depending upon [REQUIRED/QUIET/<NONE>] argument.
macro(GLOG_REPORT_NOT_FOUND REASON_MSG)
unset(GLOG_FOUND)
unset(GLOG_INCLUDE_DIRS)
unset(GLOG_LIBRARIES)
# Make results of search visible in the CMake GUI if glog has not
# been found so that user does not have to toggle to advanced view.
mark_as_advanced(CLEAR GLOG_INCLUDE_DIR
GLOG_LIBRARY)
glog_reset_find_library_prefix()
# Note <package>_FIND_[REQUIRED/QUIETLY] variables defined by FindPackage()
# use the camelcase library name, not uppercase.
if (Glog_FIND_QUIETLY)
message(STATUS "Failed to find glog - " ${REASON_MSG} ${ARGN})
elseif (Glog_FIND_REQUIRED)
message(FATAL_ERROR "Failed to find glog - " ${REASON_MSG} ${ARGN})
else()
# Neither QUIETLY nor REQUIRED, use no priority which emits a message
# but continues configuration and allows generation.
message("-- Failed to find glog - " ${REASON_MSG} ${ARGN})
endif ()
return()
endmacro(GLOG_REPORT_NOT_FOUND)
# Protect against any alternative find_package scripts for this library having
# been called previously (in a client project) which set GLOG_FOUND, but not
# the other variables we require / set here which could cause the search logic
# here to fail.
unset(GLOG_FOUND)
# -----------------------------------------------------------------
# By default, if the user has expressed no preference for using an exported
# glog CMake configuration over performing a search for the installed
# components, and has not specified any hints for the search locations, then
# prefer a glog exported configuration if available.
if (NOT DEFINED GLOG_PREFER_EXPORTED_GLOG_CMAKE_CONFIGURATION
AND NOT GLOG_INCLUDE_DIR_HINTS
AND NOT GLOG_LIBRARY_DIR_HINTS)
message(STATUS "No preference for use of exported glog CMake configuration "
"set, and no hints for include/library directories provided. "
"Defaulting to preferring an installed/exported glog CMake configuration "
"if available.")
set(GLOG_PREFER_EXPORTED_GLOG_CMAKE_CONFIGURATION TRUE)
endif()
if (GLOG_PREFER_EXPORTED_GLOG_CMAKE_CONFIGURATION)
# Try to find an exported CMake configuration for glog, as generated by
# glog versions > 0.3.4
#
# We search twice, s/t we can invert the ordering of precedence used by
# find_package() for exported package build directories, and installed
# packages (found via CMAKE_SYSTEM_PREFIX_PATH), listed as items 6) and 7)
# respectively in [1].
#
# By default, exported build directories are (in theory) detected first, and
# this is usually the case on Windows. However, on OS X & Linux, the install
# path (/usr/local) is typically present in the PATH environment variable
# which is checked in item 4) in [1] (i.e. before both of the above, unless
# NO_SYSTEM_ENVIRONMENT_PATH is passed). As such on those OSs installed
# packages are usually detected in preference to exported package build
# directories.
#
# To ensure a more consistent response across all OSs, and as users usually
# want to prefer an installed version of a package over a locally built one
# where both exist (esp. as the exported build directory might be removed
# after installation), we first search with NO_CMAKE_PACKAGE_REGISTRY which
# means any build directories exported by the user are ignored, and thus
# installed directories are preferred. If this fails to find the package
# we then research again, but without NO_CMAKE_PACKAGE_REGISTRY, so any
# exported build directories will now be detected.
#
# To prevent confusion on Windows, we also pass NO_CMAKE_BUILDS_PATH (which
# is item 5) in [1]), to not preferentially use projects that were built
# recently with the CMake GUI to ensure that we always prefer an installed
# version if available.
#
# NOTE: We use the NAMES option as glog erroneously uses 'google-glog' as its
# project name when built with CMake, but exports itself as just 'glog'.
# On Linux/OS X this does not break detection as the project name is
# not used as part of the install path for the CMake package files,
# e.g. /usr/local/lib/cmake/glog, where the <glog> suffix is hardcoded
# in glog's CMakeLists. However, on Windows the project name *is*
# part of the install prefix: C:/Program Files/google-glog/[include,lib].
# However, by default CMake checks:
# C:/Program Files/<FIND_PACKAGE_ARGUMENT_NAME='glog'> which does not
# exist and thus detection fails. Thus we use the NAMES to force the
# search to use both google-glog & glog.
#
# [1] http://www.cmake.org/cmake/help/v2.8.11/cmake.html#command:find_package
find_package(glog QUIET
NAMES google-glog glog
NO_MODULE
NO_CMAKE_PACKAGE_REGISTRY
NO_CMAKE_BUILDS_PATH)
if (glog_FOUND)
message(STATUS "Found installed version of glog: ${glog_DIR}")
else()
# Failed to find an installed version of glog, repeat search allowing
# exported build directories.
message(STATUS "Failed to find installed glog CMake configuration, "
"searching for glog build directories exported with CMake.")
# Again pass NO_CMAKE_BUILDS_PATH, as we know that glog is exported and
# do not want to treat projects built with the CMake GUI preferentially.
find_package(glog QUIET
NAMES google-glog glog
NO_MODULE
NO_CMAKE_BUILDS_PATH)
if (glog_FOUND)
message(STATUS "Found exported glog build directory: ${glog_DIR}")
endif(glog_FOUND)
endif(glog_FOUND)
set(FOUND_INSTALLED_GLOG_CMAKE_CONFIGURATION ${glog_FOUND})
if (FOUND_INSTALLED_GLOG_CMAKE_CONFIGURATION)
message(STATUS "Detected glog version: ${glog_VERSION}")
set(GLOG_FOUND ${glog_FOUND})
# glog wraps the include directories into the exported glog::glog target.
set(GLOG_INCLUDE_DIR "")
set(GLOG_LIBRARY glog::glog)
else (FOUND_INSTALLED_GLOG_CMAKE_CONFIGURATION)
message(STATUS "Failed to find an installed/exported CMake configuration "
"for glog, will perform search for installed glog components.")
endif (FOUND_INSTALLED_GLOG_CMAKE_CONFIGURATION)
endif(GLOG_PREFER_EXPORTED_GLOG_CMAKE_CONFIGURATION)
if (NOT GLOG_FOUND)
# Either failed to find an exported glog CMake configuration, or user
# told us not to use one. Perform a manual search for all glog components.
# Handle possible presence of lib prefix for libraries on MSVC, see
# also GLOG_RESET_FIND_LIBRARY_PREFIX().
if (MSVC)
# Preserve the caller's original values for CMAKE_FIND_LIBRARY_PREFIXES
# s/t we can set it back before returning.
set(CALLERS_CMAKE_FIND_LIBRARY_PREFIXES "${CMAKE_FIND_LIBRARY_PREFIXES}")
# The empty string in this list is important, it represents the case when
# the libraries have no prefix (shared libraries / DLLs).
set(CMAKE_FIND_LIBRARY_PREFIXES "lib" "" "${CMAKE_FIND_LIBRARY_PREFIXES}")
endif (MSVC)
# Search user-installed locations first, so that we prefer user installs
# to system installs where both exist.
list(APPEND GLOG_CHECK_INCLUDE_DIRS
/usr/local/include
/usr/local/homebrew/include # Mac OS X
/opt/local/var/macports/software # Mac OS X.
/opt/local/include
/usr/include)
# Windows (for C:/Program Files prefix).
list(APPEND GLOG_CHECK_PATH_SUFFIXES
glog/include
glog/Include
Glog/include
Glog/Include
google-glog/include # CMake installs with project name prefix.
google-glog/Include)
list(APPEND GLOG_CHECK_LIBRARY_DIRS
/usr/local/lib
/usr/local/homebrew/lib # Mac OS X.
/opt/local/lib
/usr/lib)
# Windows (for C:/Program Files prefix).
list(APPEND GLOG_CHECK_LIBRARY_SUFFIXES
glog/lib
glog/Lib
Glog/lib
Glog/Lib
google-glog/lib # CMake installs with project name prefix.
google-glog/Lib)
# Search supplied hint directories first if supplied.
find_path(GLOG_INCLUDE_DIR
NAMES glog/logging.h
HINTS ${GLOG_INCLUDE_DIR_HINTS}
PATHS ${GLOG_CHECK_INCLUDE_DIRS}
PATH_SUFFIXES ${GLOG_CHECK_PATH_SUFFIXES})
if (NOT GLOG_INCLUDE_DIR OR
NOT EXISTS ${GLOG_INCLUDE_DIR})
glog_report_not_found(
"Could not find glog include directory, set GLOG_INCLUDE_DIR "
"to directory containing glog/logging.h")
endif (NOT GLOG_INCLUDE_DIR OR
NOT EXISTS ${GLOG_INCLUDE_DIR})
find_library(GLOG_LIBRARY NAMES glog
HINTS ${GLOG_LIBRARY_DIR_HINTS}
PATHS ${GLOG_CHECK_LIBRARY_DIRS}
PATH_SUFFIXES ${GLOG_CHECK_LIBRARY_SUFFIXES})
if (NOT GLOG_LIBRARY OR
NOT EXISTS ${GLOG_LIBRARY})
glog_report_not_found(
"Could not find glog library, set GLOG_LIBRARY "
"to full path to libglog.")
endif (NOT GLOG_LIBRARY OR
NOT EXISTS ${GLOG_LIBRARY})
# Mark internally as found, then verify. GLOG_REPORT_NOT_FOUND() unsets
# if called.
set(GLOG_FOUND TRUE)
# Glog does not seem to provide any record of the version in its
# source tree, thus cannot extract version.
# Catch case when caller has set GLOG_INCLUDE_DIR in the cache / GUI and
# thus FIND_[PATH/LIBRARY] are not called, but specified locations are
# invalid, otherwise we would report the library as found.
if (GLOG_INCLUDE_DIR AND
NOT EXISTS ${GLOG_INCLUDE_DIR}/glog/logging.h)
glog_report_not_found(
"Caller defined GLOG_INCLUDE_DIR:"
" ${GLOG_INCLUDE_DIR} does not contain glog/logging.h header.")
endif (GLOG_INCLUDE_DIR AND
NOT EXISTS ${GLOG_INCLUDE_DIR}/glog/logging.h)
# TODO: This regex for glog library is pretty primitive, we use lowercase
# for comparison to handle Windows using CamelCase library names, could
# this check be better?
string(TOLOWER "${GLOG_LIBRARY}" LOWERCASE_GLOG_LIBRARY)
if (GLOG_LIBRARY AND
NOT "${LOWERCASE_GLOG_LIBRARY}" MATCHES ".*glog[^/]*")
glog_report_not_found(
"Caller defined GLOG_LIBRARY: "
"${GLOG_LIBRARY} does not match glog.")
endif (GLOG_LIBRARY AND
NOT "${LOWERCASE_GLOG_LIBRARY}" MATCHES ".*glog[^/]*")
glog_reset_find_library_prefix()
endif(NOT GLOG_FOUND)
# Set standard CMake FindPackage variables if found.
if (GLOG_FOUND)
set(GLOG_INCLUDE_DIRS ${GLOG_INCLUDE_DIR})
set(GLOG_LIBRARIES ${GLOG_LIBRARY})
endif (GLOG_FOUND)
# If we are using an exported CMake glog target, the include directories are
# wrapped into the target itself, and do not have to be (and are not)
# separately specified. In which case, we should not add GLOG_INCLUDE_DIRS
# to the list of required variables in order that glog be reported as found.
if (FOUND_INSTALLED_GLOG_CMAKE_CONFIGURATION)
set(GLOG_REQUIRED_VARIABLES GLOG_LIBRARIES)
else()
set(GLOG_REQUIRED_VARIABLES GLOG_INCLUDE_DIRS GLOG_LIBRARIES)
endif()
# Handle REQUIRED / QUIET optional arguments.
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(Glog DEFAULT_MSG
${GLOG_REQUIRED_VARIABLES})
# Only mark internal variables as advanced if we found glog, otherwise
# leave them visible in the standard GUI for the user to set manually.
if (GLOG_FOUND)
mark_as_advanced(FORCE GLOG_INCLUDE_DIR
GLOG_LIBRARY
glog_DIR) # Autogenerated by find_package(glog)
endif (GLOG_FOUND)