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98 lines
4.2 KiB
98 lines
4.2 KiB
#.rst: |
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# FindHinnantDate |
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# --------------- |
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# |
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# This module finds Howard Hinnant's date and time library for C++11 and beyond |
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# See https://github.com/HowardHinnant/date for details. |
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# |
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# This will define the following variables:: |
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# |
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# HinnantDate_FOUND - True if the system has the library |
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# HinnantDate_INCLUDE_DIR - The directory which includes the header |
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# HinnantDate_ROOT_DIR - The base directory of the library |
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# |
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# and the following imported targets:: |
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# |
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# HinnantDate::Date - The target to use date.h |
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# |
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# You can set HinnantDate_ROOT_DIR as hint to the location of the library. |
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# |
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# The target will enable the required C++11 standard in your compiler. You can |
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# use any later standard but you have to enable them explicitly. |
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# Copyright (c) 2016 Christian Dávid |
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# All rights reserved. |
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# |
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# Redistribution and use in source and binary forms, with or without |
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# modification, are permitted provided that the following conditions are met: |
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# |
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# Redistributions of source code must retain the above copyright notice, this |
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# list of conditions and the following disclaimer. |
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# |
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# Redistributions in binary form must reproduce the above copyright notice, |
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# this list of conditions and the following disclaimer in the documentation |
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# and/or other materials provided with the distribution. |
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# |
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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# POSSIBILITY OF SUCH DAMAGE. |
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cmake_minimum_required(VERSION 3.1) |
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# ensure cache entry |
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set(HinnantDate_ROOT_DIR "${HinnantDate_ROOT_DIR}" CACHE PATH "Root directory of Howard Hinnant's date library") |
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set(HinnantDate_NOT_FOUND_MESSAGE "Could NOT find HinnantDate. |
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Maybe you need to adjust the search paths or HinnantDate_ROOT_DIR.") |
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find_file(HinnantDate_INCLUDE_FILE |
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date.h date/date.h include/date/date.h |
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HINTS |
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${HinnantDate_ROOT_DIR} |
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${HinnantDate_ROOT_DIR}/include |
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) |
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mark_as_advanced(HinnantDate_INCLUDE_FILE) |
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if (HinnantDate_INCLUDE_FILE) |
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# Validate that correct file is found |
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file(STRINGS ${HinnantDate_INCLUDE_FILE} check_result |
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LIMIT_COUNT 1 |
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REGEX "^ *// Copyright [(]c[)] 2015.* Howard Hinnant *$" |
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) |
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if("${check_result}" STREQUAL "") |
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string(APPEND HinnantDate_NOT_FOUND_MESSAGE "\nRejecting found '${HinnantDate_INCLUDE_FILE}', it seems to be a name twin.") |
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unset(HinnantDate_INCLUDE_FILE CACHE) |
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else() |
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# Check succeeded, create target |
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get_filename_component(HinnantDate_INCLUDE_DIR "${HinnantDate_INCLUDE_FILE}" DIRECTORY CACHE) |
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mark_as_advanced(HinnantDate_INCLUDE_DIR) |
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set(HinnantDate_ROOT_DIR "${HinnantDate_INCLUDE_DIR}") |
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unset(HinnantDate_NOT_FOUND_MESSAGE) |
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if(NOT TARGET HinnantDate::Date) |
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add_library(HinnantDate::Date INTERFACE IMPORTED) |
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set_target_properties(HinnantDate::Date PROPERTIES |
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INTERFACE_INCLUDE_DIRECTORIES "${HinnantDate_INCLUDE_DIR}" |
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INTERFACE_COMPILE_FEATURES "cxx_auto_type;cxx_static_assert;cxx_decltype;cxx_alias_templates;cxx_strong_enums" |
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# Due to cmake restrictions the standard cannot be set directly to interface imported targets. Instead required compile |
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# features are set (list maybe incomplete). Please note that this list shall be a minimal set of required features. |
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# CXX_STANDARD 11 |
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# CXX_STANDARD_REQUIRED true |
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) |
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endif() |
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endif() |
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endif() |
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include(FindPackageHandleStandardArgs) |
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find_package_handle_standard_args(HinnantDate |
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REQUIRED_VARS HinnantDate_ROOT_DIR HinnantDate_INCLUDE_DIR |
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FAIL_MESSAGE ${HinnantDate_NOT_FOUND_MESSAGE} |
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)
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