autotools: Deprecate the use of autotools

Since Meson will eventually be the only build system deprecate autotools
now. It can still be used by invoking configure with the flag
  --enable-autotools

NAKed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Acked-by: Eric Engestrom <eric.engestrom@intel.com>
Acked-by: Kenneth Graunke <kenneth@whitecape.org>
Acked-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Acked-by: Rob Clark <robdclark@gmail.com>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
Acked-by: Marek Olšák <marek.olsak@amd.com>
Acked-by: Kristian H. Kristensen <hoegsberg@chromium.org>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Gert Wollny <gw.fossdev@gmail.com>

diff --git a/configure.ac b/configure.ac
index e4d20054d5f3eabd3052a539ab7e09bd778c5230..c7473d77eff2345145ff7fc50128ab4911451aa3 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -52,6 +52,19 @@ mingw*)
     ;;
 esac
 
+AC_ARG_ENABLE(autotools,
+   [AS_HELP_STRING([--enable-autotools],
+                   [Enable the use of this autotools based build configuration])],
+   [enable_autotools=$enableval], [enable_autotools=no])
+
+if test "x$enable_autotools" != "xyes" ; then
+    AC_MSG_ERROR([the autotools build system has been deprecated in favour of
+    meson and will be removed eventually. For instructions on how to use meson
+    see https://www.mesa3d.org/meson.html.
+    If you still want to use the autotools build, then add --enable-autotools
+    to the configure command line.])
+fi
+
 # Support silent build rules, requires at least automake-1.11. Disable
 # by either passing --disable-silent-rules to configure or passing V=1
 # to make