First stab add adding a Meson build system

Add meson.build and try to convert this to use Meson rather than CMake
as a build system.  This is still experimental.
Get a .pc file as part of the Meson build system.

Author: zeising

meson.build

@@ -0,0 +1,64 @@
+project('libepoll-shim', 'c',
+	version : '0.0.1',
+	license : 'MIT',
+	default_options : [ 'c_std=c11' ],
+	meson_version : '>=0.40.0' )
+
+libepollshim_version = meson.project_version().split('.')
+
+dir_data	= join_paths(get_option('prefix'), get_option('datadir'))
+dir_sysconf	= join_paths(get_option('prefix'), get_option('sysconfdir'))
+dir_libexec	= join_paths(get_option('prefix'), get_option('libexecdir'))
+dir_lib		= join_paths(get_option('prefix'), get_option('libdir'))
+dir_include	= join_paths(get_option('prefix'), get_option('includedir'), 'libepoll-shim/sys')
+dir_src_test	= join_paths(meson.source_root(), 'test')
+dir_src		= join_paths(meson.source_root(), 'src')
+
+# Compiler setup
+cc = meson.get_compiler('c')
+cflags = ['-Wall', '-Wextra', '-Werror', '-fvisibility=hidden']
+add_project_arguments(cflags, language: 'c')
+
+#-Wno-missing-prototypes -Wno-padded -Wno-missing-variable-declarations -Wno-thread-safety-analysis
+
+libepollshim_so_version = '0.0.0'
+
+# Dependencies
+thread_dep = dependency('threads')
+pkgconfig = import('pkgconfig')
+
+# Include directories
+includes_include = include_directories('include')
+
+header_libepollshim = [ 'include/sys/epoll.h',
+	'include/sys/timerfd.h',
+	'include/sys/signalfd.h'
+]
+
+install_headers(header_libepollshim, subdir : 'libepoll-shim/sys')
+
+src_libepollshim = [ 'src/epoll.c',
+	'src/timerfd.c',
+	'src/signalfd.c',
+	'src/common.c'
+]
+
+src_libepollshim += header_libepollshim
+
+deps_libepollshim = [ thread_dep ]
+
+lib_libepollshim = shared_library('epoll-shim',
+	src_libepollshim,
+	include_directories : includes_include,
+	dependencies : deps_libepollshim,
+	version : libepollshim_so_version,
+	install : true
+)
+
+pkgconfig.generate(
+	filebase : 'libepoll-shim',
+	name : 'libepoll-shim',
+	description : 'small epoll implementation using kqueue',
+	version : meson.project_version(),
+	libraries : lib_libepollshim
+)