make fbcon and systemd optional
--- a/meson.build
+++ b/meson.build
@@ -24,9 +24,9 @@ webp_dep     = dependency('libwebp', required : get_option('webp'))
 udev_dep     = dependency('libudev')
 input_dep    = dependency('libinput')
 xkb_dep      = dependency('xkbcommon')
-glib_dep     = dependency('glib-2.0')
-tsm_dep      = dependency('libtsm', required : false)
-systemd_dep  = dependency('libsystemd', required : false, version : '>=237')
+glib_dep     = dependency('glib-2.0', required : get_option('fbcon'))
+tsm_dep      = dependency('libtsm', required : get_option('fbcon'))
+systemd_dep  = dependency('libsystemd', required : get_option('systemd'), version : '>=237')
 
 # other library deps
 cc           = meson.get_compiler('c')
@@ -74,7 +74,7 @@ if get_option('webp').enabled()
     read_srcs += 'rd/read-webp.c'
     config.set('HAVE_LIBWEBP', true)
 endif
-if systemd_dep.found()
+if systemd_dep.found() and get_option('systemd').enabled()
     config.set('HAVE_SYSTEMD', true)
 endif
 
@@ -155,7 +155,7 @@ fbcon_srcs   = [ 'fbcon.c', 'drmtools.c', 'fbtools.c', 'gfx.c',
 fbcon_deps   = [ drm_dep, cairo_dep, util_dep, udev_dep, input_dep, xkb_dep, glib_dep,
                  tsm_dep, systemd_dep ]
 
-if tsm_dep.found() and target_machine.system() == 'linux'
+if tsm_dep.found() and target_machine.system() == 'linux' and get_option('fbcon').enabled()
     executable('fbcon',
                sources             : fbcon_srcs,
                dependencies        : fbcon_deps,
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -4,3 +4,5 @@ option('tiff', type: 'feature', value : 'enabled')
 option('webp', type: 'feature', value : 'auto')
 option('motif', type: 'feature', value : 'auto')
 option('pdf', type: 'feature', value : 'enabled')
+option('fbcon', type: 'feature', value : 'auto')
+option('systemd', type: 'feature', value : 'auto')