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

[Gert Wollny]

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

Signed-off-by: Gert Wollny <gw.fossdev at gmail.com>
---
IMO autotools should be properly deprecated prior it its removal, so here 
is a patch to do just that. I think autotools should be marked as deprecated 
for the 19.0 release and, depending on feedback, it could be removed with 19.1.
Anyway, in the end it's up to the release team how to handle this. 

Best,
Gert

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

diff --git a/configure.ac b/configure.ac
index 9b437a252c..73f5978bb7 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