[PATCH xf86-video-amdgpu 13/19] configure: check for XORG_DRIVER_CHECK_EXT prior to using it

[Emil Velikov]

From: Emil Velikov <emil.velikov at collabora.com>

Signed-off-by: Emil Velikov <emil.velikov at collabora.com>
---
Noticed while skimming through the intel driver - haven't came across
this while building the amdgpu driver.
---
 configure.ac | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/configure.ac b/configure.ac
index 7b7a4b1..91fbb7b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -43,6 +43,12 @@ m4_ifndef([XORG_MACROS_VERSION],
 XORG_MACROS_VERSION(1.8)
 XORG_DEFAULT_OPTIONS
 
+# Require X.Org server macros (i.e. XORG_DRIVER_CHECK_EXT) to check for required modules
+m4_ifndef([XORG_DRIVER_CHECK_EXT],
+          [m4_fatal([must install xorg-server macros before running autoconf/autogen.
+  Hint: either install from source, git://anongit.freedesktop.org/xorg/xserver or,
+  depending on your distribution, try package 'xserver-xorg-dev' or 'xorg-x11-server-devel'])])
+
 # Initialize libtool
 AC_DISABLE_STATIC
 AC_PROG_LIBTOOL
-- 
2.16.0