[Mesa-dev] [PATCH] autotools: Deprecate the use of autotools

[Matt Turner]

From: Gert Wollny <gw.fossdev at gmail.com>

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 at alum.mit.edu>
Acked-by: Eric Engestrom <eric.engestrom at intel.com>
Acked-by: Kenneth Graunke <kenneth at whitecape.org>
Acked-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
Acked-by: Jason Ekstrand <jason at jlekstrand.net>
Acked-by: Rob Clark <robdclark at gmail.com>
Acked-by: Marek Olšák <marek.olsak at amd.com>
Reviewed-by: Christian Gmeiner <christian.gmeiner at gmail.com>
Reviewed-by: Matt Turner <mattst88 at gmail.com>
Reviewed-by: Eric Anholt <eric at anholt.net>
Signed-off-by: Gert Wollny <gw.fossdev at gmail.com>
---
I think there's support for overriding the sole objection to this patch.

To confirm:

    (1) The plan is to remove Autotools, perhaps after the 19.0 release

    (2) This patch's purpose is to ensure that everyone knows that
        Autotools will be going away (think: people who build Mesa as
        part of an automated process and wouldn't notice a deprecation
	warning unless it requires some action from them)

    (3) We expect all reasonable concerns about Meson to be resolved
        before Autotools is removed (e.g., reconfiguration problems,
	retrieving configuration command line, configuration status
	output, etc.)

 configure.ac | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/configure.ac b/configure.ac
index e4d20054d5f..c7473d77eff 100644
--- 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
-- 
2.19.2