CMake: Add FindCups.cmake from upstream cmake

This FindCups defines a target, which the FindCups.cmake in the currently
required CMake version does not:-/

Change-Id: I76c5bb72ece80415db1971e4f2079682126fde36
Todo: Remove again once we depend on CMake 3.15.
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
This commit is contained in:
Tobias Hunger 2019-04-02 11:36:39 +02:00
parent 29f5c0ee70
commit 8a9962aba8

98
cmake/FindCups.cmake Normal file
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@ -0,0 +1,98 @@
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
#[=======================================================================[.rst:
FindCups
--------
Find the CUPS printing system.
Set CUPS_REQUIRE_IPP_DELETE_ATTRIBUTE to TRUE if you need a version which
features this function (i.e. at least 1.1.19)
Imported targets
^^^^^^^^^^^^^^^^
This module defines :prop_tgt:`IMPORTED` target ``Cups::Cups``, if Cups has
been found.
Result variables
^^^^^^^^^^^^^^^^
This module will set the following variables in your project:
``CUPS_FOUND``
true if CUPS headers and libraries were found
``CUPS_INCLUDE_DIRS``
the directory containing the Cups headers
``CUPS_LIBRARIES``
the libraries to link against to use CUPS.
``CUPS_VERSION_STRING``
the version of CUPS found (since CMake 2.8.8)
Cache variables
^^^^^^^^^^^^^^^
The following cache variables may also be set:
``CUPS_INCLUDE_DIR``
the directory containing the Cups headers
#]=======================================================================]
find_path(CUPS_INCLUDE_DIR cups/cups.h )
find_library(CUPS_LIBRARIES NAMES cups )
if (CUPS_INCLUDE_DIR AND CUPS_LIBRARIES AND CUPS_REQUIRE_IPP_DELETE_ATTRIBUTE)
include(${CMAKE_CURRENT_LIST_DIR}/CheckLibraryExists.cmake)
include(${CMAKE_CURRENT_LIST_DIR}/CMakePushCheckState.cmake)
cmake_push_check_state()
set(CMAKE_REQUIRED_QUIET ${Cups_FIND_QUIETLY})
# ippDeleteAttribute is new in cups-1.1.19 (and used by kdeprint)
CHECK_LIBRARY_EXISTS(cups ippDeleteAttribute "" CUPS_HAS_IPP_DELETE_ATTRIBUTE)
cmake_pop_check_state()
endif ()
if (CUPS_INCLUDE_DIR AND EXISTS "${CUPS_INCLUDE_DIR}/cups/cups.h")
file(STRINGS "${CUPS_INCLUDE_DIR}/cups/cups.h" cups_version_str
REGEX "^#[\t ]*define[\t ]+CUPS_VERSION_(MAJOR|MINOR|PATCH)[\t ]+[0-9]+$")
unset(CUPS_VERSION_STRING)
foreach(VPART MAJOR MINOR PATCH)
foreach(VLINE ${cups_version_str})
if(VLINE MATCHES "^#[\t ]*define[\t ]+CUPS_VERSION_${VPART}[\t ]+([0-9]+)$")
set(CUPS_VERSION_PART "${CMAKE_MATCH_1}")
if(CUPS_VERSION_STRING)
string(APPEND CUPS_VERSION_STRING ".${CUPS_VERSION_PART}")
else()
set(CUPS_VERSION_STRING "${CUPS_VERSION_PART}")
endif()
endif()
endforeach()
endforeach()
endif ()
include(FindPackageHandleStandardArgs)
if (CUPS_REQUIRE_IPP_DELETE_ATTRIBUTE)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(Cups
REQUIRED_VARS CUPS_LIBRARIES CUPS_INCLUDE_DIR CUPS_HAS_IPP_DELETE_ATTRIBUTE
VERSION_VAR CUPS_VERSION_STRING)
else ()
FIND_PACKAGE_HANDLE_STANDARD_ARGS(Cups
REQUIRED_VARS CUPS_LIBRARIES CUPS_INCLUDE_DIR
VERSION_VAR CUPS_VERSION_STRING)
endif ()
mark_as_advanced(CUPS_INCLUDE_DIR CUPS_LIBRARIES)
if (CUPS_FOUND)
set(CUPS_INCLUDE_DIRS "${CUPS_INCLUDE_DIR}")
if (NOT TARGET Cups::Cups)
add_library(Cups::Cups INTERFACE IMPORTED)
set_target_properties(Cups::Cups PROPERTIES
INTERFACE_LINK_LIBRARIES "${CUPS_LIBRARIES}"
INTERFACE_INCLUDE_DIRECTORIES "${CUPS_INCLUDE_DIR}")
endif ()
endif ()