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# SPDX-FileCopyrightText: 2016 Tobias C. Berner <tcberner@FreeBSD.org>
# SPDX-FileCopyrightText: 2017 Adriaan de Groot <groot@kde.org>
#
# SPDX-License-Identifier: BSD-2-Clause
#[=======================================================================[.rst:
FindInotify
--------------
Try to find inotify on this system. This finds:
- libinotify on Unix like systems, or
- the kernel's inotify.
This will define the following variables:
``Inotify_FOUND``
True if inotify is available
``Inotify_LIBRARIES``
This has to be passed to target_link_libraries()
``Inotify_INCLUDE_DIRS``
This has to be passed to target_include_directories()
On some platforms like Linux and SunOS, the libraries and include directories
are empty, even though ``Inotify_FOUND`` may be set to TRUE. This is because
no special includes or libraries are needed. On other systems
these may be needed to use inotify.
Since 5.32.0.
#]=======================================================================]
cmake_policy(VERSION 3.16)
# Reset the cache var before searching for sys/inotify.h
# This is required, because on systems with native inotify we reset Inotify_INCLUDE_DIRS
# to an empty string. Rerunning CMake in this case will reuse the empty variable
# and we will not get into if(Inotify_INCLUDE_DIRS) the second time
unset(Inotify_INCLUDE_DIRS CACHE)
find_path(Inotify_INCLUDE_DIRS sys/inotify.h PATHS /usr/include NO_DEFAULT_PATH)
find_path(Inotify_INCLUDE_DIRS sys/inotify.h)
if(Inotify_INCLUDE_DIRS)
# On OSes with a kernel implementation, there is no library to link against.
# On some others inotify is implemented through a library, libinotify.
# If we found a header, but not a library, assume a kernel implementation
find_library(Inotify_LIBRARIES NAMES inotify)
if(NOT Inotify_LIBRARIES)
set(Inotify_FOUND TRUE)
set(Inotify_LIBRARIES "" CACHE STRING "" FORCE)
set(Inotify_INCLUDE_DIRS "" CACHE STRING "" FORCE)
else()
# On FreeBSD 15+ we may end up with both in-kernel and libinotify
# implementation. To discern between them, compare prefixes of
# ${Inotify_INCLUDE_DIRS} and ${Inotify_LIBRARIES}: if we get
# /usr/include and /usr/local/lib/libinotify.so then assume that the
# kernel implementation is available and user wants it, instead of libinotify
cmake_path(GET Inotify_INCLUDE_DIRS PARENT_PATH includes_prefix)
cmake_path(GET Inotify_LIBRARIES PARENT_PATH lib_prefix)
cmake_path(GET lib_prefix PARENT_PATH lib_prefix)
cmake_path(COMPARE ${includes_prefix} EQUAL ${lib_prefix} prefixes_match)
if(NOT prefixes_match)
set(Inotify_FOUND TRUE)
set(Inotify_LIBRARIES "" CACHE STRING "" FORCE)
set(Inotify_INCLUDE_DIRS "" CACHE STRING "" FORCE)
else()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(Inotify
FOUND_VAR
Inotify_FOUND
REQUIRED_VARS
Inotify_LIBRARIES
Inotify_INCLUDE_DIRS
)
include(FeatureSummary)
set_package_properties(Inotify PROPERTIES
URL "https://github.com/libinotify-kqueue/"
DESCRIPTION "inotify API on the *BSD family of operating systems."
)
endif()
endif()
if(NOT TARGET Inotify::Inotify)
add_library(Inotify::Inotify INTERFACE IMPORTED)
set_property(TARGET Inotify::Inotify PROPERTY INTERFACE_INCLUDE_DIRECTORIES "${Inotify_INCLUDE_DIRS}")
set_property(TARGET Inotify::Inotify PROPERTY INTERFACE_LINK_LIBRARIES "${Inotify_LIBRARIES}")
endif()
else()
set(Inotify_FOUND FALSE)
endif()
mark_as_advanced(Inotify_LIBRARIES Inotify_INCLUDE_DIRS)
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