add wayland variable to pkgconfig

modules should be able to detect whether wayland support is available

configure.ac

@@ -694,7 +694,7 @@ if test "x${e_cv_want_wayland_only}" != "xno" ;then
       fi
       ac_wayland_protocols_pkgdatadir=`$PKG_CONFIG --variable=pkgdatadir wayland-protocols`
       AC_SUBST(WAYLAND_PROTOCOLS_DATADIR, $ac_wayland_protocols_pkgdatadir)
-
+      AC_SUBST(WAYLAND, "true")
       AC_DEFINE_UNQUOTED([HAVE_WAYLAND],[1],[enable wayland support])
     ])
 else

enlightenment.pc.in

@@ -10,6 +10,7 @@ themes=${pkgdatadir}/themes
 backgrounds=${pkgdatadir}/backgrounds
 config_apps=@datadir@/@PACKAGE@/config-apps
 release=@release@
+wayland=@WAYLAND@
 
 Name: enlightenment
 Description: Enlightenment Window Manager

meson.build

@@ -350,6 +350,11 @@ subdir('doc')
 meson.add_install_script('meson/meson_inst.sh'   , suid_exes)
 meson.add_install_script('meson/meson_modules.sh', module_files)
 
+wayland = 'false'
+if config_h.has('HAVE_WAYLAND') == true
+	wayland = 'true'
+endif
+
 configure_file(output       : 'config.h',
                install      : false,
                configuration: config_h)
@@ -369,7 +374,8 @@ pkgconfig.generate(name             : proj,
                                         'pkgdatadir=${datarootdir}/' + proj + '/data',
                                         'themes=${pkgdatadir}/themes',
                                         'backgrounds=${pkgdatadir}/backgrounds',
-                                        'release=@0@'.format(release)
+                                        'release=@0@'.format(release),
+                                        'wayland=@0@'.format(wayland)
                                       ]
                   )