[clutter/wip/stereo: 4/6] build: Don't explicitly check for libGL

[Robert Bragg <rbragg src gnome org>]

commit b5681b1e39dc07efc527bd9486e9ef2cc84f0add
Author: Robert Bragg <robert linux intel com>
Date:   Thu Aug 4 16:48:35 2011 +0100

    build: Don't explicitly check for libGL
    
    Since libGL is abstracted by Cogl Clutter no longer needs to be
    explicitly checking for the gl pkg-config flags and directly lining with
    libGL.

 configure.ac |   21 ---------------------
 1 files changed, 0 insertions(+), 21 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index f909d8f..f40eb78 100644
--- a/configure.ac
+++ b/configure.ac
@@ -208,21 +208,6 @@ AS_CASE([$CLUTTER_FLAVOUR],
           CLUTTER_WINSYS_BASE=x11
           CLUTTER_WINSYS_BASE_LIB="x11/libclutter-x11.la"
           CLUTTER_SONAME_INFIX=glx
-
-          # Mesa 7.3 added a GL pkg-config file, finally
-          PKG_CHECK_EXISTS([gl],
-                           [BACKEND_PC_FILES="$BACKEND_PC_FILES gl"],
-                           # if a pkg-config file isn't found just add -lGL
-                           # and hope for the best.
-                           [FLAVOUR_LIBS="$FLAVOUR_LIBS -lGL"])
-
-          # We might fall back to DRM for sync-to-vblank on GLX
-          PKG_CHECK_EXISTS([libdrm],
-                           [
-                             AC_DEFINE([HAVE_DRM], [1], [Have libdrm support])
-                             BACKEND_PC_FILES="$BACKEND_PC_FILES libdrm"
-                           ],
-                           [])
         ],
 
         [opengl-egl-xlib],
@@ -241,9 +226,6 @@ AS_CASE([$CLUTTER_FLAVOUR],
           # I think this winsys can be API and ABI compatible with the
           # glx flavour so we can also be cheeky and use the same soname
           CLUTTER_SONAME_INFIX=glx
-
-          PKG_CHECK_EXISTS([gl], [BACKEND_PC_FILES="$BACKEND_PC_FILES gl"], [])
-          PKG_CHECK_EXISTS([egl], [BACKEND_PC_FILES="$BACKEND_PC_FILES egl"], [])
         ],
 
         [wayland],
@@ -255,9 +237,6 @@ AS_CASE([$CLUTTER_FLAVOUR],
 
           CLUTTER_WINSYS=wayland
           CLUTTER_SONAME_INFIX=wayland
-
-          PKG_CHECK_EXISTS([gl], [BACKEND_PC_FILES="$BACKEND_PC_FILES gl"], [])
-          PKG_CHECK_EXISTS([egl], [BACKEND_PC_FILES="$BACKEND_PC_FILES egl"], [])
           PKG_CHECK_EXISTS([wayland-client xkbcommon],
 			   [BACKEND_PC_FILES="$BACKEND_PC_FILES wayland-client xkbcommon"], [])
         ],