79 lines
3.1 KiB
CMake
79 lines
3.1 KiB
CMake
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#.rest:
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# FindEpoll
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# --------------
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#
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# Try to find epoll or epoll-shim on this system. This finds:
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# - some shim on Unix like systems (FreeBSD), or
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# - the kernel's epoll on Linux systems.
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#
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# This will define the following variables:
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#
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# ``epoll_FOUND``
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# True if epoll is available
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# ``epoll_LIBRARIES``
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# This has to be passed to target_link_libraries()
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# ``epoll_INCLUDE_DIRS``
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# This has to be passed to target_include_directories()
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#
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# On Linux, the libraries and include directories are empty,
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# even though epoll_FOUND may be set to TRUE. This is because
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# no special includes or libraries are needed. On other systems
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# these may be needed to use epoll.
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#=============================================================================
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# Copyright 2019 Tobias C. Berner <tcberner@FreeBSD.org>
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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
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# are met:
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#
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# 1. Redistributions of source code must retain the copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#=============================================================================
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find_path(epoll_INCLUDE_DIRS sys/epoll.h PATH_SUFFIXES libepoll-shim)
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if(epoll_INCLUDE_DIRS)
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# On Linux there is no library to link against, on the BSDs there is.
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# On the BSD's, epoll is implemented through a library, libepoll-shim.
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if( CMAKE_SYSTEM_NAME MATCHES "Linux")
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set(epoll_FOUND TRUE)
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set(epoll_LIBRARIES "")
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set(epoll_INCLUDE_DIRS "")
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else()
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find_library(epoll_LIBRARIES NAMES epoll-shim)
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include(FindPackageHandleStandardArgs)
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find_package_handle_standard_args(epoll
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FOUND_VAR
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epoll_FOUND
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REQUIRED_VARS
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epoll_LIBRARIES
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epoll_INCLUDE_DIRS
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)
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mark_as_advanced(epoll_LIBRARIES epoll_INCLUDE_DIRS)
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include(FeatureSummary)
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set_package_properties(epoll PROPERTIES
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URL "https://github.com/FreeBSDDesktop/epoll-shim"
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DESCRIPTION "small epoll implementation using kqueue"
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)
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endif()
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else()
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set(epoll_FOUND FALSE)
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endif()
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mark_as_advanced(epoll_LIBRARIES epoll_INCLUDE_DIRS)
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