Review Request 129316: Add new cmake module `FindLibinotify.cmake`.

[Adriaan de Groot]

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This adds a cmake module to do the right kind of checking (for inotify) for the platform:
  - on linux, check for the kernel subsystem / header
  - on freebsd, check for the port / header
So it's still going to have knock-on effects (or subsequent reviews and changes) for consumers of inotify?

The name FindLibinotify doesn't really make sense for the linux case (where it's not a library). Should it be named FindInotify instead?

- Adriaan de Groot


On Nov. 3, 2016, 7:30 a.m., Tobias Berner wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/129316/
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> 
> (Updated Nov. 3, 2016, 7:30 a.m.)
> 
> 
> Review request for Extra Cmake Modules, Adriaan de Groot, Gleb Popov, and Raphael Kubo da Costa.
> 
> 
> Repository: extra-cmake-modules
> 
> 
> Description
> -------
> 
> FreeBSD also has inotify. However it is a library and not a kernel subsystem.
> 
> 
> With that change, targets checking for sys/inotify.h could switch from something like 
> ```
> option(ENABLE_INOTIFY "Try to use inotify for directory monitoring" ON)
> if(ENABLE_INOTIFY)
>     include(CheckIncludeFiles)
>     check_include_files(sys/inotify.h SYS_INOTIFY_H_FOUND)
>     set(HAVE_SYS_INOTIFY_H ${SYS_INOTIFY_H_FOUND})
> endif()
> ```
> to 
> ```
> option(ENABLE_INOTIFY "Try to use inotify for directory monitoring" ON)
> if(ENABLE_INOTIFY) 
>     find_package(Libinotify)
>     set_package_properties(Libinotify PROPERTIES
>                                                                   PURPOSE "Filesystem alteration notifications using inotify")
>     set(HAVE_SYS_INOTIFY_H ${LIBINOTIFY_FOUND})
> else()
> set(HAVE_SYS_INOTIFY_H FALSE)
> endif()
> ```
> [from kcoreaddons], and append `${LIBINOTIFY_INCLUDE_DIRS}` to the `include_directories`, aswell as `${LIBINOTIFY_LIBRARIES}` to the link-libraires.
> 
> 
> Diffs
> -----
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>   find-modules/FindLibinotify.cmake PRE-CREATION 
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> Diff: https://git.reviewboard.kde.org/r/129316/diff/
> 
> 
> Testing
> -------
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> Used in the unofficial KDE FreeBSD ports.
> 
> 
> Thanks,
> 
> Tobias Berner
> 
>

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