diff -u -r1.95 -r1.96
--- configure	24 May 2011 18:40:41 -0000	1.95
+++ configure	3 Jun 2011 21:30:13 -0000	1.96
@@ -2843,6 +2843,8 @@

 if test "${enable_opengl}" != "no"; then
   G4VIS_USE_OPENGLX=1
   G4VIS_BUILD_OPENGLX_DRIVER=1

+  G4VIS_USE_OPENGL=1
+  G4VIS_BUILD_OPENGL=1

 fi
 
 G4UI_USE_TCSH=

@@ -2958,6 +2960,8 @@

+G4LIB_USE_ZLIB=1
+

diff -u -r1.14 -r1.15
--- geant4.m4	2 May 2011 20:57:57 -0000	1.14
+++ geant4.m4	3 Jun 2011 21:30:13 -0000	1.15
@@ -130,16 +130,19 @@

 
 AC_MSG_RESULT($G4SYSTEM)
 

-dnl OpenGL setting, based on previous configuration argument.

+dnl Set G4 OpenGL variables if enabled.

 if test "${enable_opengl}" != "no"; then
   G4VIS_USE_OPENGLX=1
   G4VIS_BUILD_OPENGLX_DRIVER=1

+  G4VIS_USE_OPENGL=1
+  G4VIS_BUILD_OPENGL=1

 fi
 
 dnl Terminals.
 G4UI_USE_TCSH=
 G4UI_USE_CSH=
 

+dnl Select best terminal based on platform.

 case "$host_os" in
   linux*|darwin* )
     G4UI_USE_TCSH=1

@@ -172,6 +175,9 @@

 dnl Setting for G4 physics lists.
 AC_ENABLE_G4NEUTRONHP_NEGLECT_DOPPLER
 

+dnl Always enable usage of system's zlib.
+G4LIB_USE_ZLIB=1
+

 dnl Variable substitutions for Geant4 environment.
 AC_SUBST(G4SYSTEM)
 AC_SUBST(G4INSTALL)