Mesa (master): configure.ac: Check for xcb-dri2 to enable EGL dri2 driver.

[Chia-I Wu]

Module: Mesa
Branch: master
Commit: 2eb7a2fccd5416d56fd88618ed3138aeeaf0da1c
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=2eb7a2fccd5416d56fd88618ed3138aeeaf0da1c

Author: Chia-I Wu <olvaffe at gmail.com>
Date:   Fri Feb  5 10:46:11 2010 +0800

configure.ac: Check for xcb-dri2 to enable EGL dri2 driver.

Check that xcb-dri2 is available before including EGL dri2 driver into
EGL_DRIVERS_DIRS.

---

 configure.ac |   17 +++++++++++------
 1 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/configure.ac b/configure.ac
index 16d315e..b6f71f9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -911,13 +911,18 @@ if test "x$enable_egl" = xyes; then
     SRC_DIRS="$SRC_DIRS egl"
     EGL_LIB_DEPS="$DLOPEN_LIBS -lpthread"
     EGL_DRIVERS_DIRS=""
-    if test "$enable_static" != yes && test "$mesa_driver" != osmesa; then
+    if test "$enable_static" != yes; then
         # build egl_glx when libGL is built
-        EGL_DRIVERS_DIRS="glx"
-    fi
-    if test "$mesa_driver" == dri; then
-        # build egl_dri2 when dri is enabled
-        EGL_DRIVERS_DIRS="$EGL_DRIVERS_DIRS dri2"
+        if test "$mesa_driver" != osmesa; then
+            EGL_DRIVERS_DIRS="glx"
+        fi
+
+        # build egl_dri2 when xcb-dri2 is available
+        PKG_CHECK_EXISTS([x11-xcb xcb-dri2 xcb-xfixes],
+			 [have_xcb_dri2=yes],[have_xcb_dri2=no])
+        if test "$have_xcb_dri2" = yes; then
+            EGL_DRIVERS_DIRS="$EGL_DRIVERS_DIRS dri2"
+        fi
     fi
 fi
 AC_SUBST([EGL_LIB_DEPS])