also port the banner someone gets when they

build bubblewrap with autotools to meson and
add an indicator of whether the version of SELinux is >= 2.3 to it

Signed-off-by: Mikhail Kulko <mkulko@mkulko.me>

configure.ac

@@ -71,6 +71,7 @@ AM_CONDITIONAL([ENABLE_ZSH_COMPLETION], [test "x$with_zsh_completion_dir" != "xn
 
 # ------------------------------------------------------------------------------
 have_selinux=no
+have_selinux_2_3=no
 AC_ARG_ENABLE(selinux, AS_HELP_STRING([--disable-selinux], [Disable optional SELINUX support]))
 AS_IF([test "x$enable_selinux" != "xno"], [
         PKG_CHECK_MODULES([SELINUX], [libselinux >= 2.1.9],
@@ -81,8 +82,9 @@ AS_IF([test "x$enable_selinux" != "xno"], [
         AS_IF([test "x$have_selinux" = xno && test "x$enable_selinux" = xyes],
           [AC_MSG_ERROR([*** SELinux support requested but libraries not found])])
         PKG_CHECK_MODULES([SELINUX_2_3], [libselinux >= 2.3],
-                [AC_DEFINE(HAVE_SELINUX_2_3, 1, [Define if SELinux is version >= 2.3])],
-                [:])
+                [AC_DEFINE(HAVE_SELINUX_2_3, 1, [Define if SELinux is version >= 2.3])
+                 have_selinux_2_3=yes],
+                [have_selinux_2_3=no])
 ])
 AM_CONDITIONAL(HAVE_SELINUX, [test "$have_selinux" = "yes"])
 
@@ -152,8 +154,8 @@ echo "
 
     man pages (xsltproc):                         $enable_man
     SELinux:                                      $have_selinux
+     ... >= 2.3:                                  $have_selinux_2_3
     setuid mode on make install:                  $with_priv_mode
     require default userns:                       $enable_require_userns
-    warn when session parameter's set implicitly: $warn_implicit_session_opt
     mysteriously satisfying to pop:               yes"
 echo ""

meson.build

@@ -174,3 +174,14 @@ endif
 if get_option('tests')
   subdir('tests')
 endif
+
+message()
+message('   @0@ @1@'.format(meson.project_name(), meson.project_version()))
+message('   ===================')
+message()
+message('   man pages (xsltproc):                        @0@'.format(build_man_page))
+message('   SELinux:                                     @0@'.format(cdata.has('HAVE_SELINUX')))
+message('    ... >= 2.3:                                 @0@'.format(cdata.has('HAVE_SELINUX_2_3')))
+message('   require default userns:                      @0@'.format(get_option('require_userns')))
+message('   mysteriously satisfying to pop:              true')
+message()