add meson

Simpler build system. Placing in contrib for now.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

contrib/README

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+This directory contains meson build instructions for irqbalance. This is here to see if there is any interest from
+the general community.

contrib/meson.build

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+project('irqbalance', 'c', version: '1.9.0', default_options: ['warning_level=1'])
+cc = meson.get_compiler('c')
+
+glib_dep = dependency('glib-2.0')
+m_dep = cc.find_library('m', required: false)
+capng_dep = dependency('libcap-ng', required: get_option('capng'))
+ncurses_dep = dependency('curses', required: get_option('ui'))
+systemd_dep = dependency('libsystemd', required: get_option('systemd'))
+
+cdata = configuration_data()
+cdata.set('HAVE_GETOPT_LONG', cc.has_function('getopt_long'))
+cdata.set('HAVE_IRQBALANCEUI', ncurses_dep.found())
+cdata.set('HAVE_NUMA_H', cc.has_header('numa.h'))
+cdata.set('HAVE_LIBCAP_NG', capng_dep.found())
+cdata.set('HAVE_LIBSYSTEMD', systemd_dep.found())
+cdata.set_quoted('VERSION', meson.project_version())
+cfile = configure_file(output: 'config.h', configuration: cdata)
+
+if cdata.get('HAVE_IRQBALANCEUI')
+  add_project_arguments('-D_GNU_SOURCE', language: 'c')
+
+  executable(
+    'irqbalance-ui',
+    '../ui/helpers.c',
+    '../ui/irqbalance-ui.c',
+    '../ui/ui.c',
+    dependencies: [glib_dep, ncurses_dep],
+    install: true,
+  )
+endif
+
+executable(
+  'irqbalance',
+  '../activate.c',
+  '../bitmap.c',
+  '../classify.c',
+  '../cputree.c',
+  '../irqbalance.c',
+  '../irqlist.c',
+  '../numa.c',
+  '../placement.c',
+  '../procinterrupts.c',
+  dependencies: [glib_dep, m_dep, capng_dep, systemd_dep],
+  install: true,
+)

contrib/meson_options.txt

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+option('capng', type : 'feature',
+  description : 'Build with libcap-ng support',
+)
+
+option('systemd', type : 'feature',
+  description : 'Build with systemd support',
+)
+
+option('ui', type : 'feature',
+  description : 'Build the UI component',
+)