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Merge pull request #7694 from sergiud:cmake-config-optional-components

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This commit is contained in:
Alexander Alekhin 2016-12-19 13:53:36 +00:00
commit 2638abe12b
1 changed files with 42 additions and 9 deletions
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51
cmake/templates/OpenCVConfig.cmake.in
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@ -14,6 +14,10 @@
#
# find_package(OpenCV REQUIRED core videoio)
#
# You can also mark OpenCV components as optional:
# find_package(OpenCV REQUIRED core OPTIONAL_COMPONENTS viz)
#
# If the module is found then OPENCV_<MODULE>_FOUND is set to TRUE.
#
# This file will define the following variables:
@ -48,6 +52,21 @@ SET(OpenCV_VERSION_PATCH @OPENCV_VERSION_PATCH@)
SET(OpenCV_VERSION_TWEAK 0)
SET(OpenCV_VERSION_STATUS "@OPENCV_VERSION_STATUS@")
include(FindPackageHandleStandardArgs)
if(NOT CMAKE_VERSION VERSION_LESS 2.8.8
AND OpenCV_FIND_COMPONENTS # prevent excessive output
)
# HANDLE_COMPONENTS was introduced in CMake 2.8.8
list(APPEND _OpenCV_FPHSA_ARGS HANDLE_COMPONENTS)
# The missing components will be handled by the FindPackageHandleStandardArgs
# module.
set(_OpenCV_HANDLE_COMPONENTS_MANUALLY FALSE)
else()
# The missing components will be handled by this config.
set(_OpenCV_HANDLE_COMPONENTS_MANUALLY TRUE)
endif()
# Extract directory name from full path of the file currently being processed.
# Note that CMake 2.8.3 introduced CMAKE_CURRENT_LIST_DIR. We reimplement it
# for older versions of CMake to support these as well.
@ -120,24 +139,33 @@ endif()
set(OpenCV_WORLD_COMPONENTS @OPENCV_WORLD_MODULES@)
# expand short module names and see if requested components exist
set(OpenCV_FIND_COMPONENTS_ "")
foreach(__cvcomponent ${OpenCV_FIND_COMPONENTS})
# Store the name of the original component so we can set the
# OpenCV_<component>_FOUND variable which can be checked by the user.
set (__original_cvcomponent ${__cvcomponent})
if(NOT __cvcomponent MATCHES "^opencv_")
set(__cvcomponent opencv_${__cvcomponent})
endif()
list(FIND OpenCV_LIB_COMPONENTS ${__cvcomponent} __cvcomponentIdx)
if(__cvcomponentIdx LESS 0)
#requested component is not found...
if(OpenCV_FIND_REQUIRED)
message(FATAL_ERROR "${__cvcomponent} is required but was not found")
elseif(NOT OpenCV_FIND_QUIETLY)
message(WARNING "${__cvcomponent} is required but was not found")
endif()
if(_OpenCV_HANDLE_COMPONENTS_MANUALLY)
# Either the component is required or the user did not set any components at
# all. In the latter case, the OpenCV_FIND_REQUIRED_<component> variable
# will not be defined since it is not set by this config. So let's assume
# the implicitly set components are always required.
if(NOT DEFINED OpenCV_FIND_REQUIRED_${__original_cvcomponent} OR
OpenCV_FIND_REQUIRED_${__original_cvcomponent})
message(FATAL_ERROR "${__cvcomponent} is required but was not found")
elseif(NOT OpenCV_FIND_QUIETLY)
# The component was marked as optional using OPTIONAL_COMPONENTS
message(WARNING "Optional component ${__cvcomponent} was not found")
endif()
endif(_OpenCV_HANDLE_COMPONENTS_MANUALLY)
#indicate that module is NOT found
string(TOUPPER "${__cvcomponent}" __cvcomponentUP)
set(${__cvcomponentUP}_FOUND "${__cvcomponentUP}_FOUND-NOTFOUND")
set(OpenCV_${__original_cvcomponent}_FOUND FALSE)
else()
list(APPEND OpenCV_FIND_COMPONENTS_ ${__cvcomponent})
# Not using list(APPEND) here, because OpenCV_LIBS may not exist yet.
# Also not clearing OpenCV_LIBS anywhere, so that multiple calls
# to find_package(OpenCV) with different component lists add up.
@ -145,6 +173,7 @@ foreach(__cvcomponent ${OpenCV_FIND_COMPONENTS})
#indicate that module is found
string(TOUPPER "${__cvcomponent}" __cvcomponentUP)
set(${__cvcomponentUP}_FOUND 1)
set(OpenCV_${__original_cvcomponent}_FOUND TRUE)
endif()
if(OpenCV_SHARED AND ";${OpenCV_WORLD_COMPONENTS};" MATCHES ";${__cvcomponent};" AND NOT TARGET ${__cvcomponent})
get_target_property(__implib_dbg opencv_world IMPORTED_IMPLIB_DEBUG)
@ -170,7 +199,6 @@ foreach(__cvcomponent ${OpenCV_FIND_COMPONENTS})
endif()
endif()
endforeach()
set(OpenCV_FIND_COMPONENTS ${OpenCV_FIND_COMPONENTS_})
# ==============================================================
# Compatibility stuff
@ -226,3 +254,8 @@ macro(ocv_list_filterout lst regex)
endif()
endforeach()
endmacro()
# We do not actually need REQUIRED_VARS to be checked for. Just use the
# installation directory for the status.
find_package_handle_standard_args(OpenCV REQUIRED_VARS OpenCV_INSTALL_PATH
VERSION_VAR OpenCV_VERSION ${_OpenCV_FPHSA_ARGS})