[swift-dev] Adding kqueue lib to libdispatch test Makefile

[Ron Olson]

Hi all-

I'm trying to build Swift 3 for Fedora 24. Fedora doesn't come with 
libkqueue so I built and installed that manually into 
/usr/(include|lib). Building libdispatch as part of the build script 
fails when trying to build the tests in swift-corelibs-libdispatch/tests 
because it can't find kqueue and kevent. If I modify the Makefile to 
include -lkqueue after -lpthread, it builds fine, but running the build 
script again (swift/util/build-script) complains about the directory not 
being clean.

What I'd like to do (I think) is modify ... something ... to make sure 
the Makefile in the tests directory includes kqueue; I've been diving 
into the build-settings.ini, as well as the various scripts, but CMake 
and Ninja are new to me and I'm a little flummoxed about what to modify 
(and hopefully bubble those changes up to a buildbot_linux_fedora or 
something like that). I've been poking around the various scripts (the 
most promising was the LIBDISPATCH_BUILD_ARGS in build-script-impl, but 
adding -lkqueue doesn't seem to have any effect).

So if somebody could give me a pointer (so to speak) about where to 
look, I'd greatly appreciate it.

Thanks,

Ron