diff --git a/README b/README
index 0174c3291c60763f846808f93e53490f06024f2e..d271dbb532a66f322f61fde2c34207962ce8ae2e 100644
--- a/README
+++ b/README
@@ -5,17 +5,15 @@ facilities.
 
 To install Gmsh, type
 
-./configure --with-fltk-prefix=/path/to/fltk-1.1.x
+./configure
 make
 make install
 
-This requires the Fast Light Tool Kit (FLTK, http://www.fltk.org)
-version 1.1 or above, the GNU Scientific Library (GSL,
-http://sources.redhat.com/gsl/) and OpenGL (for a free implementation,
-see http://www.mesa3d.org) to be installed on your system. If not in
-default locations, you can either use the --with-fltk-prefix,
---with-gsl-prefix and --with-gl-prefix configure options, or you can
-set the environment variables FLTK_DIR, GSL_DIR and GL_DIR.
+This requires the GSL (http://sources.redhat.com/gsl/) and FLTK 1.1.x
+(http://www.fltk.org), configured with OpenGL support, to be installed
+on your system. If not in default locations, you can either use the
+--with-fltk-prefix and --with-gsl-prefix configure options, or you can
+set the environment variables FLTK_DIR and GSL_DIR.
 
 To install a non-graphical version of Gmsh (that does not require
 FLTK nor OpenGL), type
diff --git a/configure b/configure
index 04db300256d0265d7b6cf4eb7a8d105e52b79880..3d2418dfcb66eb672931f8bc1b7c08d80e3baa26 100755
--- a/configure
+++ b/configure
@@ -824,10 +824,6 @@ Fine tuning of the installation directories:
 _ACEOF
 
   cat <<\_ACEOF
-
-X features:
-  --x-includes=DIR    X include files are in DIR
-  --x-libraries=DIR   X library files are in DIR
 _ACEOF
 fi
 
@@ -847,8 +843,6 @@ Optional Packages:
   --without-PACKAGE       do not use PACKAGE (same as --with-PACKAGE=no)
   --with-gsl-prefix=PFX   prefix where GSL is installed
   --with-fltk-prefix=PFX  prefix where FLTK is installed
-  --with-gl-prefix=PFX    prefix where OpenGL is installed
-  --with-x                use the X Window System
 
 Some influential environment variables:
   CC          C compiler command
@@ -1228,14 +1222,6 @@ else
   FLTK_PREFIX="$FLTK_DIR"
 fi;
 
-# Check whether --with-gl-prefix or --without-gl-prefix was given.
-if test "${with_gl_prefix+set}" = set; then
-  withval="$with_gl_prefix"
-  GL_PREFIX=$withval
-else
-  GL_PREFIX="$GL_DIR"
-fi;
-
 # Check whether --enable-gui or --disable-gui was given.
 if test "${enable_gui+set}" = set; then
   enableval="$enable_gui"
@@ -2674,8 +2660,8 @@ fi
 
 
 if test "x${AR}" = "x:"; then
-  { { echo "$as_me:$LINENO: error: Configure could not find the library archiver" >&5
-echo "$as_me: error: Configure could not find the library archiver" >&2;}
+  { { echo "$as_me:$LINENO: error: Could not find the library archiver" >&5
+echo "$as_me: error: Could not find the library archiver" >&2;}
    { (exit aborting.); exit aborting.; }; }
 fi
 AR="${AR} ruvs"
@@ -2685,30 +2671,142 @@ GMSH_DIRS="Common DataStr Geo Mesh Numeric Parallel Parser Plugin"
 if test "x$enable_gui" != "xno"; then
   GMSH_DIRS="${GMSH_DIRS} Graphics Fltk jpeg"
   GMSH_LIBS="-Llib -lGmshFltk -lGmshParser -lGmshGraphics -lGmshMesh -lGmshGeo -lGmshNumeric -lGmshCommon -lGmshDataStr -lGmshJpeg -lGmshPlugin -lGmshParallel"
+  VERSION_FLAGS="-D_FLTK"
+  # Extract the first word of "fltk-config", so it can be a program name with args.
+set dummy fltk-config; ac_word=$2
+echo "$as_me:$LINENO: checking for $ac_word" >&5
+echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
+if test "${ac_cv_path_FLTKCONFIG+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  case $FLTKCONFIG in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_FLTKCONFIG="$FLTKCONFIG" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for ac_exec_ext in '' $ac_executable_extensions; do
+  if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_FLTKCONFIG="$as_dir/$ac_word$ac_exec_ext"
+    echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+done
 
-#  dnl We should check for FLTK like this:
-#  AC_PATH_PROG(FLTKCONFIG,fltk-config)
-#
-#  if test "x$FLTKCONFIG" = x; then
-#    AC_MSG_ERROR([Sorry, flphoto requires FLTK 1.1.x.])
-#  else
-#    CFLAGS="`$FLTKCONFIG --cflags` $CFLAGS"
-#    CXXFLAGS="`$FLTKCONFIG --cflags` $CXXFLAGS"
-#    LIBS="`$FLTKCONFIG --use-images --ldflags` $LIBS"
-#  fi
+  ;;
+esac
+fi
+FLTKCONFIG=$ac_cv_path_FLTKCONFIG
+
+if test -n "$FLTKCONFIG"; then
+  echo "$as_me:$LINENO: result: $FLTKCONFIG" >&5
+echo "${ECHO_T}$FLTKCONFIG" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+
+  if test "x${FLTKCONFIG}" = "x" -a "x${FLTK_PREFIX}" != "x" ; then
+    # Extract the first word of "fltk-config", so it can be a program name with args.
+set dummy fltk-config; ac_word=$2
+echo "$as_me:$LINENO: checking for $ac_word" >&5
+echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
+if test "${ac_cv_path_FLTKCONFIG+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  case $FLTKCONFIG in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_FLTKCONFIG="$FLTKCONFIG" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in ${FLTK_PREFIX}
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for ac_exec_ext in '' $ac_executable_extensions; do
+  if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_FLTKCONFIG="$as_dir/$ac_word$ac_exec_ext"
+    echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+done
+
+  test -z "$ac_cv_path_FLTKCONFIG" && ac_cv_path_FLTKCONFIG=""""
+  ;;
+esac
+fi
+FLTKCONFIG=$ac_cv_path_FLTKCONFIG
+
+if test -n "$FLTKCONFIG"; then
+  echo "$as_me:$LINENO: result: $FLTKCONFIG" >&5
+echo "${ECHO_T}$FLTKCONFIG" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+
+  fi
+  if test "x${FLTKCONFIG}" = "x" ; then
+    # Extract the first word of "fltk-config", so it can be a program name with args.
+set dummy fltk-config; ac_word=$2
+echo "$as_me:$LINENO: checking for $ac_word" >&5
+echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
+if test "${ac_cv_path_FLTKCONFIG+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  case $FLTKCONFIG in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_FLTKCONFIG="$FLTKCONFIG" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in ${HOME}/SOURCES/fltk-1.1
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for ac_exec_ext in '' $ac_executable_extensions; do
+  if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_FLTKCONFIG="$as_dir/$ac_word$ac_exec_ext"
+    echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+done
+
+  test -z "$ac_cv_path_FLTKCONFIG" && ac_cv_path_FLTKCONFIG=""""
+  ;;
+esac
+fi
+FLTKCONFIG=$ac_cv_path_FLTKCONFIG
+
+if test -n "$FLTKCONFIG"; then
+  echo "$as_me:$LINENO: result: $FLTKCONFIG" >&5
+echo "${ECHO_T}$FLTKCONFIG" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
 
-  VERSION_FLAGS="-D_FLTK"
-  if test "x${FLTK_PREFIX}" != "x"; then
-    FLTK_LIB_PREFIX="-L${FLTK_PREFIX}/lib"
-    GUI_INCLUDE="-I${FLTK_PREFIX}"
   fi
-  if test "x${GL_PREFIX}" != "x"; then
-    GUI_INCLUDE="${GUI_INCLUDE} -I${GL_PREFIX}/include"
+  if test "x$FLTKCONFIG" = "x"; then
+    { { echo "$as_me:$LINENO: error: Could not find fltk-config. Try --with-prefix-fltk?" >&5
+echo "$as_me: error: Could not find fltk-config. Try --with-prefix-fltk?" >&2;}
+   { (exit 1); exit 1; }; }
   fi
+  GUI_LIBS="`$FLTKCONFIG --use-gl --ldstaticflags`"
+  GUI_INCLUDE="`$FLTKCONFIG --use-gl --cxxflags`"
 else
   GMSH_DIRS="${GMSH_DIRS} Box"
   GMSH_LIBS="-Llib -lGmshBox -lGmshParser -lGmshMesh -lGmshGeo -lGmshNumeric -lGmshPlugin -lGmshCommon -lGmshDataStr -lGmshParallel"
   VERSION_FLAGS="-D_BLACKBOX"
+  GUI_LIBS=""
   GUI_INCLUDE=""
 fi
 
@@ -2751,33 +2849,145 @@ fi
 OPT_FLAGS="${CXXFLAGS}"
 LINKER="${CXX}"
 POSTBUILD=""
+if test "x$enable_gui" != "xno"; then
+  GMSH_LIBS="${GMSH_LIBS} ${GUI_LIBS}"
+else
+  GMSH_LIBS="${GMSH_LIBS} -lm";
+fi
 
 case "$UNAME" in
 
   CYGWIN* | MINGW*)
-    OPT_FLAGS="-O2"
     OS_FLAGS="-mwindows -DWIN32 -D_LITTLE_ENDIAN"
     LINKER="g++ -Wl,--subsystem,windows -mwindows"
     if test "x$enable_gui" != "xno"; then
-      GMSH_LIBS="${GMSH_LIBS} Fltk/Win32Icon.res ${FLTK_LIB_PREFIX} -lfltk_gl -lglu32 -lopengl32 -lfltk -lole32 -luuid -lcomctl32 -lwsock32 -lm"
-    else
-      GMSH_LIBS="${GMSH_LIBS} -lm"
+      GMSH_LIBS="${GMSH_LIBS} Fltk/Win32Icon.res"
     fi
     ;;
 
   Darwin*)
-    OPT_FLAGS="-O2"
     OS_FLAGS="-D_NODLL"
-    if test "x$enable_gui" != "xno"; then
-      GMSH_LIBS="${GMSH_LIBS} ${FLTK_LIB_PREFIX} -lfltk_gl -lfltk -framework AGL -framework OpenGL -framework Carbon -framework ApplicationServices"
-    else
-      GMSH_LIBS="${GMSH_LIBS}"
-    fi
     POSTBUILD="/Developer/Tools/Rez -t APPL -o bin/gmsh Fltk/MacRes.r"
     ;;
 
+  Linux*)
+    OS_FLAGS="-D_LITTLE_ENDIAN"
+    GMSH_LIBS="${GMSH_LIBS} -ldl"
+    ;;
+
+  OSF1*)
+    OS_FLAGS="-D_LITTLE_ENDIAN"
+    ;;
+
+  AIX*)
+    OS_FLAGS="-D_BSD -D_NODLL"
+    ;;
+
+  IRIX*)
+    OS_FLAGS="-mips3 -n32"
+    CXX="CC"
+    CC="cc"
+    OPT_FLAGS="-O2 -OPT:Olimit=0 -LANG:std"
+    AR="CC -mips3 -n32 -ar -o"
+    LINKER="CC -O2 -mips3 -n32"
+    ;;
+
+  SunOS*)
+    OS_FLAGS="-D_NODLL"
+    CXX="g++"
+    CC="gcc"
+    GMSH_LIBS="${GMSH_LIBS} -lsocket -lnsl -ldl"
+    ;;
+
   *)
-    if test "x$enable_gui" != "xno"; then
+    OS_FLAGS="-D_NODLL"
+    ;;
+
+esac
+
+
+
+
+
+
+
+
+
+if test "x${GSL_PREFIX}" = "x"; then
+  LDFLAGS="-lgslcblas"
+else
+  LDFLAGS="-L${GSL_PREFIX}/lib -lgslcblas"
+fi
+
+echo "$as_me:$LINENO: checking for gsl_vector_alloc in -lgsl" >&5
+echo $ECHO_N "checking for gsl_vector_alloc in -lgsl... $ECHO_C" >&6
+if test "${ac_cv_lib_gsl_gsl_vector_alloc+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lgsl  $LIBS"
+cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+#include "confdefs.h"
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char gsl_vector_alloc ();
+#ifdef F77_DUMMY_MAIN
+#  ifdef __cplusplus
+     extern "C"
+#  endif
+   int F77_DUMMY_MAIN() { return 1; }
+#endif
+int
+main ()
+{
+gsl_vector_alloc ();
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_lib_gsl_gsl_vector_alloc=yes
+else
+  echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+ac_cv_lib_gsl_gsl_vector_alloc=no
+fi
+rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+echo "$as_me:$LINENO: result: $ac_cv_lib_gsl_gsl_vector_alloc" >&5
+echo "${ECHO_T}$ac_cv_lib_gsl_gsl_vector_alloc" >&6
+if test $ac_cv_lib_gsl_gsl_vector_alloc = yes; then
+  GSL="yes"
+else
+  GSL="no"
+fi
+
+if test "x${GSL_PREFIX}" = "x"; then
+  GSL_LIBS="-lgsl -lgslcblas"
+else
+  GSL_LIBS="-L${GSL_PREFIX}/lib -lgsl -lgslcblas"
+  GSL_INCLUDE="-I${GSL_PREFIX}/include"
+fi
+
+
 
 ac_ext=cc
 ac_cpp='$CXXCPP $CPPFLAGS'
@@ -2976,107 +3186,19 @@ ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ex
 ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
 
 
-echo "$as_me:$LINENO: checking for X" >&5
-echo $ECHO_N "checking for X... $ECHO_C" >&6
-
-
-# Check whether --with-x or --without-x was given.
-if test "${with_x+set}" = set; then
-  withval="$with_x"
-
-fi;
-# $have_x is `yes', `no', `disabled', or empty when we do not yet know.
-if test "x$with_x" = xno; then
-  # The user explicitly disabled X.
-  have_x=disabled
-else
-  if test "x$x_includes" != xNONE && test "x$x_libraries" != xNONE; then
-    # Both variables are already set.
-    have_x=yes
-  else
-    if test "${ac_cv_have_x+set}" = set; then
+echo "$as_me:$LINENO: checking for ANSI C header files" >&5
+echo $ECHO_N "checking for ANSI C header files... $ECHO_C" >&6
+if test "${ac_cv_header_stdc+set}" = set; then
   echo $ECHO_N "(cached) $ECHO_C" >&6
 else
-  # One or both of the vars are not set, and there is no cached value.
-ac_x_includes=no ac_x_libraries=no
-rm -fr conftest.dir
-if mkdir conftest.dir; then
-  cd conftest.dir
-  # Make sure to not put "make" in the Imakefile rules, since we grep it out.
-  cat >Imakefile <<'_ACEOF'
-acfindx:
-	@echo 'ac_im_incroot="${INCROOT}"; ac_im_usrlibdir="${USRLIBDIR}"; ac_im_libdir="${LIBDIR}"'
-_ACEOF
-  if (xmkmf) >/dev/null 2>/dev/null && test -f Makefile; then
-    # GNU make sometimes prints "make[1]: Entering...", which would confuse us.
-    eval `${MAKE-make} acfindx 2>/dev/null | grep -v make`
-    # Open Windows xmkmf reportedly sets LIBDIR instead of USRLIBDIR.
-    for ac_extension in a so sl; do
-      if test ! -f $ac_im_usrlibdir/libX11.$ac_extension &&
-         test -f $ac_im_libdir/libX11.$ac_extension; then
-        ac_im_usrlibdir=$ac_im_libdir; break
-      fi
-    done
-    # Screen out bogus values from the imake configuration.  They are
-    # bogus both because they are the default anyway, and because
-    # using them would break gcc on systems where it needs fixed includes.
-    case $ac_im_incroot in
-	/usr/include) ;;
-	*) test -f "$ac_im_incroot/X11/Xos.h" && ac_x_includes=$ac_im_incroot;;
-    esac
-    case $ac_im_usrlibdir in
-	/usr/lib | /lib) ;;
-	*) test -d "$ac_im_usrlibdir" && ac_x_libraries=$ac_im_usrlibdir ;;
-    esac
-  fi
-  cd ..
-  rm -fr conftest.dir
-fi
-
-# Standard set of common directories for X headers.
-# Check X11 before X11Rn because it is often a symlink to the current release.
-ac_x_header_dirs='
-/usr/X11/include
-/usr/X11R6/include
-/usr/X11R5/include
-/usr/X11R4/include
-
-/usr/include/X11
-/usr/include/X11R6
-/usr/include/X11R5
-/usr/include/X11R4
-
-/usr/local/X11/include
-/usr/local/X11R6/include
-/usr/local/X11R5/include
-/usr/local/X11R4/include
-
-/usr/local/include/X11
-/usr/local/include/X11R6
-/usr/local/include/X11R5
-/usr/local/include/X11R4
-
-/usr/X386/include
-/usr/x386/include
-/usr/XFree86/include/X11
-
-/usr/include
-/usr/local/include
-/usr/unsupported/include
-/usr/athena/include
-/usr/local/x11r5/include
-/usr/lpp/Xamples/include
-
-/usr/openwin/include
-/usr/openwin/share/include'
-
-if test "$ac_x_includes" = no; then
-  # Guess where to find include files, by looking for Intrinsic.h.
-  # First, try using that file with no special directory specified.
   cat >conftest.$ac_ext <<_ACEOF
 #line $LINENO "configure"
 #include "confdefs.h"
-#include <X11/Intrinsic.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <float.h>
+
 _ACEOF
 if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
   (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
@@ -3095,1800 +3217,171 @@ else
   ac_cpp_err=yes
 fi
 if test -z "$ac_cpp_err"; then
-  # We can compile using X headers with no special include directory.
-ac_x_includes=
+  ac_cv_header_stdc=yes
 else
   echo "$as_me: failed program was:" >&5
   cat conftest.$ac_ext >&5
-  for ac_dir in $ac_x_header_dirs; do
-  if test -r "$ac_dir/X11/Intrinsic.h"; then
-    ac_x_includes=$ac_dir
-    break
-  fi
-done
+  ac_cv_header_stdc=no
 fi
 rm -f conftest.err conftest.$ac_ext
-fi # $ac_x_includes = no
-
-if test "$ac_x_libraries" = no; then
-  # Check for the libraries.
-  # See if we find them without any special options.
-  # Don't add to $LIBS permanently.
-  ac_save_LIBS=$LIBS
-  LIBS="-lXt $LIBS"
+
+if test $ac_cv_header_stdc = yes; then
+  # SunOS 4.x string.h does not declare mem*, contrary to ANSI.
   cat >conftest.$ac_ext <<_ACEOF
 #line $LINENO "configure"
 #include "confdefs.h"
-#include <X11/Intrinsic.h>
-#ifdef F77_DUMMY_MAIN
-#  ifdef __cplusplus
-     extern "C"
-#  endif
-   int F77_DUMMY_MAIN() { return 1; }
-#endif
-int
-main ()
-{
-XtMalloc (0)
-  ;
-  return 0;
-}
+#include <string.h>
+
 _ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  LIBS=$ac_save_LIBS
-# We can link X programs with no special library path.
-ac_x_libraries=
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  egrep "memchr" >/dev/null 2>&1; then
+  :
 else
-  echo "$as_me: failed program was:" >&5
-cat conftest.$ac_ext >&5
-LIBS=$ac_save_LIBS
-for ac_dir in `echo "$ac_x_includes $ac_x_header_dirs" | sed s/include/lib/g`
-do
-  # Don't even attempt the hair of trying to link an X program!
-  for ac_extension in a so sl; do
-    if test -r $ac_dir/libXt.$ac_extension; then
-      ac_x_libraries=$ac_dir
-      break 2
-    fi
-  done
-done
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-fi # $ac_x_libraries = no
-
-if test "$ac_x_includes" = no || test "$ac_x_libraries" = no; then
-  # Didn't find X anywhere.  Cache the known absence of X.
-  ac_cv_have_x="have_x=no"
-else
-  # Record where we found X for the cache.
-  ac_cv_have_x="have_x=yes \
-	        ac_x_includes=$ac_x_includes ac_x_libraries=$ac_x_libraries"
-fi
-fi
-
-  fi
-  eval "$ac_cv_have_x"
-fi # $with_x != no
-
-if test "$have_x" != yes; then
-  echo "$as_me:$LINENO: result: $have_x" >&5
-echo "${ECHO_T}$have_x" >&6
-  no_x=yes
-else
-  # If each of the values was on the command line, it overrides each guess.
-  test "x$x_includes" = xNONE && x_includes=$ac_x_includes
-  test "x$x_libraries" = xNONE && x_libraries=$ac_x_libraries
-  # Update the cache value to reflect the command line values.
-  ac_cv_have_x="have_x=yes \
-		ac_x_includes=$x_includes ac_x_libraries=$x_libraries"
-  echo "$as_me:$LINENO: result: libraries $x_libraries, headers $x_includes" >&5
-echo "${ECHO_T}libraries $x_libraries, headers $x_includes" >&6
-fi
-
-if test "$no_x" = yes; then
-  # Not all programs may use this symbol, but it does not hurt to define it.
-
-cat >>confdefs.h <<\_ACEOF
-#define X_DISPLAY_MISSING 1
-_ACEOF
-
-  X_CFLAGS= X_PRE_LIBS= X_LIBS= X_EXTRA_LIBS=
-else
-  if test -n "$x_includes"; then
-    X_CFLAGS="$X_CFLAGS -I$x_includes"
-  fi
-
-  # It would also be nice to do this for all -L options, not just this one.
-  if test -n "$x_libraries"; then
-    X_LIBS="$X_LIBS -L$x_libraries"
-    # For Solaris; some versions of Sun CC require a space after -R and
-    # others require no space.  Words are not sufficient . . . .
-    case `(uname -sr) 2>/dev/null` in
-    "SunOS 5"*)
-      echo "$as_me:$LINENO: checking whether -R must be followed by a space" >&5
-echo $ECHO_N "checking whether -R must be followed by a space... $ECHO_C" >&6
-      ac_xsave_LIBS=$LIBS; LIBS="$LIBS -R$x_libraries"
-      cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-#include "confdefs.h"
-
-#ifdef F77_DUMMY_MAIN
-#  ifdef __cplusplus
-     extern "C"
-#  endif
-   int F77_DUMMY_MAIN() { return 1; }
-#endif
-int
-main ()
-{
-
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_R_nospace=yes
-else
-  echo "$as_me: failed program was:" >&5
-cat conftest.$ac_ext >&5
-ac_R_nospace=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-      if test $ac_R_nospace = yes; then
-	echo "$as_me:$LINENO: result: no" >&5
-echo "${ECHO_T}no" >&6
-	X_LIBS="$X_LIBS -R$x_libraries"
-      else
-	LIBS="$ac_xsave_LIBS -R $x_libraries"
-	cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-#include "confdefs.h"
-
-#ifdef F77_DUMMY_MAIN
-#  ifdef __cplusplus
-     extern "C"
-#  endif
-   int F77_DUMMY_MAIN() { return 1; }
-#endif
-int
-main ()
-{
-
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_R_space=yes
-else
-  echo "$as_me: failed program was:" >&5
-cat conftest.$ac_ext >&5
-ac_R_space=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-	if test $ac_R_space = yes; then
-	  echo "$as_me:$LINENO: result: yes" >&5
-echo "${ECHO_T}yes" >&6
-	  X_LIBS="$X_LIBS -R $x_libraries"
-	else
-	  echo "$as_me:$LINENO: result: neither works" >&5
-echo "${ECHO_T}neither works" >&6
-	fi
-      fi
-      LIBS=$ac_xsave_LIBS
-    esac
-  fi
-
-  # Check for system-dependent libraries X programs must link with.
-  # Do this before checking for the system-independent R6 libraries
-  # (-lICE), since we may need -lsocket or whatever for X linking.
-
-  if test "$ISC" = yes; then
-    X_EXTRA_LIBS="$X_EXTRA_LIBS -lnsl_s -linet"
-  else
-    # Martyn Johnson says this is needed for Ultrix, if the X
-    # libraries were built with DECnet support.  And Karl Berry says
-    # the Alpha needs dnet_stub (dnet does not exist).
-    ac_xsave_LIBS="$LIBS"; LIBS="$LIBS $X_LIBS -lX11"
-    cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-#include "confdefs.h"
-
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char XOpenDisplay ();
-#ifdef F77_DUMMY_MAIN
-#  ifdef __cplusplus
-     extern "C"
-#  endif
-   int F77_DUMMY_MAIN() { return 1; }
-#endif
-int
-main ()
-{
-XOpenDisplay ();
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  :
-else
-  echo "$as_me: failed program was:" >&5
-cat conftest.$ac_ext >&5
-echo "$as_me:$LINENO: checking for dnet_ntoa in -ldnet" >&5
-echo $ECHO_N "checking for dnet_ntoa in -ldnet... $ECHO_C" >&6
-if test "${ac_cv_lib_dnet_dnet_ntoa+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-ldnet  $LIBS"
-cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-#include "confdefs.h"
-
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char dnet_ntoa ();
-#ifdef F77_DUMMY_MAIN
-#  ifdef __cplusplus
-     extern "C"
-#  endif
-   int F77_DUMMY_MAIN() { return 1; }
-#endif
-int
-main ()
-{
-dnet_ntoa ();
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_lib_dnet_dnet_ntoa=yes
-else
-  echo "$as_me: failed program was:" >&5
-cat conftest.$ac_ext >&5
-ac_cv_lib_dnet_dnet_ntoa=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-echo "$as_me:$LINENO: result: $ac_cv_lib_dnet_dnet_ntoa" >&5
-echo "${ECHO_T}$ac_cv_lib_dnet_dnet_ntoa" >&6
-if test $ac_cv_lib_dnet_dnet_ntoa = yes; then
-  X_EXTRA_LIBS="$X_EXTRA_LIBS -ldnet"
-fi
-
-    if test $ac_cv_lib_dnet_dnet_ntoa = no; then
-      echo "$as_me:$LINENO: checking for dnet_ntoa in -ldnet_stub" >&5
-echo $ECHO_N "checking for dnet_ntoa in -ldnet_stub... $ECHO_C" >&6
-if test "${ac_cv_lib_dnet_stub_dnet_ntoa+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-ldnet_stub  $LIBS"
-cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-#include "confdefs.h"
-
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char dnet_ntoa ();
-#ifdef F77_DUMMY_MAIN
-#  ifdef __cplusplus
-     extern "C"
-#  endif
-   int F77_DUMMY_MAIN() { return 1; }
-#endif
-int
-main ()
-{
-dnet_ntoa ();
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_lib_dnet_stub_dnet_ntoa=yes
-else
-  echo "$as_me: failed program was:" >&5
-cat conftest.$ac_ext >&5
-ac_cv_lib_dnet_stub_dnet_ntoa=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-echo "$as_me:$LINENO: result: $ac_cv_lib_dnet_stub_dnet_ntoa" >&5
-echo "${ECHO_T}$ac_cv_lib_dnet_stub_dnet_ntoa" >&6
-if test $ac_cv_lib_dnet_stub_dnet_ntoa = yes; then
-  X_EXTRA_LIBS="$X_EXTRA_LIBS -ldnet_stub"
-fi
-
-    fi
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-    LIBS="$ac_xsave_LIBS"
-
-    # msh@cis.ufl.edu says -lnsl (and -lsocket) are needed for his 386/AT,
-    # to get the SysV transport functions.
-    # Chad R. Larson says the Pyramis MIS-ES running DC/OSx (SVR4)
-    # needs -lnsl.
-    # The nsl library prevents programs from opening the X display
-    # on Irix 5.2, according to T.E. Dickey.
-    # The functions gethostbyname, getservbyname, and inet_addr are
-    # in -lbsd on LynxOS 3.0.1/i386, according to Lars Hecking.
-    echo "$as_me:$LINENO: checking for gethostbyname" >&5
-echo $ECHO_N "checking for gethostbyname... $ECHO_C" >&6
-if test "${ac_cv_func_gethostbyname+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-#include "confdefs.h"
-/* System header to define __stub macros and hopefully few prototypes,
-    which can conflict with char gethostbyname (); below.  */
-#include <assert.h>
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char gethostbyname ();
-char (*f) ();
-
-#ifdef F77_DUMMY_MAIN
-#  ifdef __cplusplus
-     extern "C"
-#  endif
-   int F77_DUMMY_MAIN() { return 1; }
-#endif
-int
-main ()
-{
-/* The GNU C library defines this for functions which it implements
-    to always fail with ENOSYS.  Some functions are actually named
-    something starting with __ and the normal name is an alias.  */
-#if defined (__stub_gethostbyname) || defined (__stub___gethostbyname)
-choke me
-#else
-f = gethostbyname;
-#endif
-
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_func_gethostbyname=yes
-else
-  echo "$as_me: failed program was:" >&5
-cat conftest.$ac_ext >&5
-ac_cv_func_gethostbyname=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-fi
-echo "$as_me:$LINENO: result: $ac_cv_func_gethostbyname" >&5
-echo "${ECHO_T}$ac_cv_func_gethostbyname" >&6
-
-    if test $ac_cv_func_gethostbyname = no; then
-      echo "$as_me:$LINENO: checking for gethostbyname in -lnsl" >&5
-echo $ECHO_N "checking for gethostbyname in -lnsl... $ECHO_C" >&6
-if test "${ac_cv_lib_nsl_gethostbyname+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-lnsl  $LIBS"
-cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-#include "confdefs.h"
-
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char gethostbyname ();
-#ifdef F77_DUMMY_MAIN
-#  ifdef __cplusplus
-     extern "C"
-#  endif
-   int F77_DUMMY_MAIN() { return 1; }
-#endif
-int
-main ()
-{
-gethostbyname ();
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_lib_nsl_gethostbyname=yes
-else
-  echo "$as_me: failed program was:" >&5
-cat conftest.$ac_ext >&5
-ac_cv_lib_nsl_gethostbyname=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-echo "$as_me:$LINENO: result: $ac_cv_lib_nsl_gethostbyname" >&5
-echo "${ECHO_T}$ac_cv_lib_nsl_gethostbyname" >&6
-if test $ac_cv_lib_nsl_gethostbyname = yes; then
-  X_EXTRA_LIBS="$X_EXTRA_LIBS -lnsl"
-fi
-
-      if test $ac_cv_lib_nsl_gethostbyname = no; then
-        echo "$as_me:$LINENO: checking for gethostbyname in -lbsd" >&5
-echo $ECHO_N "checking for gethostbyname in -lbsd... $ECHO_C" >&6
-if test "${ac_cv_lib_bsd_gethostbyname+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-lbsd  $LIBS"
-cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-#include "confdefs.h"
-
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char gethostbyname ();
-#ifdef F77_DUMMY_MAIN
-#  ifdef __cplusplus
-     extern "C"
-#  endif
-   int F77_DUMMY_MAIN() { return 1; }
-#endif
-int
-main ()
-{
-gethostbyname ();
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_lib_bsd_gethostbyname=yes
-else
-  echo "$as_me: failed program was:" >&5
-cat conftest.$ac_ext >&5
-ac_cv_lib_bsd_gethostbyname=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-echo "$as_me:$LINENO: result: $ac_cv_lib_bsd_gethostbyname" >&5
-echo "${ECHO_T}$ac_cv_lib_bsd_gethostbyname" >&6
-if test $ac_cv_lib_bsd_gethostbyname = yes; then
-  X_EXTRA_LIBS="$X_EXTRA_LIBS -lbsd"
-fi
-
-      fi
-    fi
-
-    # lieder@skyler.mavd.honeywell.com says without -lsocket,
-    # socket/setsockopt and other routines are undefined under SCO ODT
-    # 2.0.  But -lsocket is broken on IRIX 5.2 (and is not necessary
-    # on later versions), says Simon Leinen: it contains gethostby*
-    # variants that don't use the nameserver (or something).  -lsocket
-    # must be given before -lnsl if both are needed.  We assume that
-    # if connect needs -lnsl, so does gethostbyname.
-    echo "$as_me:$LINENO: checking for connect" >&5
-echo $ECHO_N "checking for connect... $ECHO_C" >&6
-if test "${ac_cv_func_connect+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-#include "confdefs.h"
-/* System header to define __stub macros and hopefully few prototypes,
-    which can conflict with char connect (); below.  */
-#include <assert.h>
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char connect ();
-char (*f) ();
-
-#ifdef F77_DUMMY_MAIN
-#  ifdef __cplusplus
-     extern "C"
-#  endif
-   int F77_DUMMY_MAIN() { return 1; }
-#endif
-int
-main ()
-{
-/* The GNU C library defines this for functions which it implements
-    to always fail with ENOSYS.  Some functions are actually named
-    something starting with __ and the normal name is an alias.  */
-#if defined (__stub_connect) || defined (__stub___connect)
-choke me
-#else
-f = connect;
-#endif
-
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_func_connect=yes
-else
-  echo "$as_me: failed program was:" >&5
-cat conftest.$ac_ext >&5
-ac_cv_func_connect=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-fi
-echo "$as_me:$LINENO: result: $ac_cv_func_connect" >&5
-echo "${ECHO_T}$ac_cv_func_connect" >&6
-
-    if test $ac_cv_func_connect = no; then
-      echo "$as_me:$LINENO: checking for connect in -lsocket" >&5
-echo $ECHO_N "checking for connect in -lsocket... $ECHO_C" >&6
-if test "${ac_cv_lib_socket_connect+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-lsocket $X_EXTRA_LIBS $LIBS"
-cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-#include "confdefs.h"
-
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char connect ();
-#ifdef F77_DUMMY_MAIN
-#  ifdef __cplusplus
-     extern "C"
-#  endif
-   int F77_DUMMY_MAIN() { return 1; }
-#endif
-int
-main ()
-{
-connect ();
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_lib_socket_connect=yes
-else
-  echo "$as_me: failed program was:" >&5
-cat conftest.$ac_ext >&5
-ac_cv_lib_socket_connect=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-echo "$as_me:$LINENO: result: $ac_cv_lib_socket_connect" >&5
-echo "${ECHO_T}$ac_cv_lib_socket_connect" >&6
-if test $ac_cv_lib_socket_connect = yes; then
-  X_EXTRA_LIBS="-lsocket $X_EXTRA_LIBS"
-fi
-
-    fi
-
-    # Guillermo Gomez says -lposix is necessary on A/UX.
-    echo "$as_me:$LINENO: checking for remove" >&5
-echo $ECHO_N "checking for remove... $ECHO_C" >&6
-if test "${ac_cv_func_remove+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-#include "confdefs.h"
-/* System header to define __stub macros and hopefully few prototypes,
-    which can conflict with char remove (); below.  */
-#include <assert.h>
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char remove ();
-char (*f) ();
-
-#ifdef F77_DUMMY_MAIN
-#  ifdef __cplusplus
-     extern "C"
-#  endif
-   int F77_DUMMY_MAIN() { return 1; }
-#endif
-int
-main ()
-{
-/* The GNU C library defines this for functions which it implements
-    to always fail with ENOSYS.  Some functions are actually named
-    something starting with __ and the normal name is an alias.  */
-#if defined (__stub_remove) || defined (__stub___remove)
-choke me
-#else
-f = remove;
-#endif
-
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_func_remove=yes
-else
-  echo "$as_me: failed program was:" >&5
-cat conftest.$ac_ext >&5
-ac_cv_func_remove=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-fi
-echo "$as_me:$LINENO: result: $ac_cv_func_remove" >&5
-echo "${ECHO_T}$ac_cv_func_remove" >&6
-
-    if test $ac_cv_func_remove = no; then
-      echo "$as_me:$LINENO: checking for remove in -lposix" >&5
-echo $ECHO_N "checking for remove in -lposix... $ECHO_C" >&6
-if test "${ac_cv_lib_posix_remove+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-lposix  $LIBS"
-cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-#include "confdefs.h"
-
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char remove ();
-#ifdef F77_DUMMY_MAIN
-#  ifdef __cplusplus
-     extern "C"
-#  endif
-   int F77_DUMMY_MAIN() { return 1; }
-#endif
-int
-main ()
-{
-remove ();
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_lib_posix_remove=yes
-else
-  echo "$as_me: failed program was:" >&5
-cat conftest.$ac_ext >&5
-ac_cv_lib_posix_remove=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-echo "$as_me:$LINENO: result: $ac_cv_lib_posix_remove" >&5
-echo "${ECHO_T}$ac_cv_lib_posix_remove" >&6
-if test $ac_cv_lib_posix_remove = yes; then
-  X_EXTRA_LIBS="$X_EXTRA_LIBS -lposix"
-fi
-
-    fi
-
-    # BSDI BSD/OS 2.1 needs -lipc for XOpenDisplay.
-    echo "$as_me:$LINENO: checking for shmat" >&5
-echo $ECHO_N "checking for shmat... $ECHO_C" >&6
-if test "${ac_cv_func_shmat+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-#include "confdefs.h"
-/* System header to define __stub macros and hopefully few prototypes,
-    which can conflict with char shmat (); below.  */
-#include <assert.h>
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char shmat ();
-char (*f) ();
-
-#ifdef F77_DUMMY_MAIN
-#  ifdef __cplusplus
-     extern "C"
-#  endif
-   int F77_DUMMY_MAIN() { return 1; }
-#endif
-int
-main ()
-{
-/* The GNU C library defines this for functions which it implements
-    to always fail with ENOSYS.  Some functions are actually named
-    something starting with __ and the normal name is an alias.  */
-#if defined (__stub_shmat) || defined (__stub___shmat)
-choke me
-#else
-f = shmat;
-#endif
-
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_func_shmat=yes
-else
-  echo "$as_me: failed program was:" >&5
-cat conftest.$ac_ext >&5
-ac_cv_func_shmat=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-fi
-echo "$as_me:$LINENO: result: $ac_cv_func_shmat" >&5
-echo "${ECHO_T}$ac_cv_func_shmat" >&6
-
-    if test $ac_cv_func_shmat = no; then
-      echo "$as_me:$LINENO: checking for shmat in -lipc" >&5
-echo $ECHO_N "checking for shmat in -lipc... $ECHO_C" >&6
-if test "${ac_cv_lib_ipc_shmat+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-lipc  $LIBS"
-cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-#include "confdefs.h"
-
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char shmat ();
-#ifdef F77_DUMMY_MAIN
-#  ifdef __cplusplus
-     extern "C"
-#  endif
-   int F77_DUMMY_MAIN() { return 1; }
-#endif
-int
-main ()
-{
-shmat ();
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_lib_ipc_shmat=yes
-else
-  echo "$as_me: failed program was:" >&5
-cat conftest.$ac_ext >&5
-ac_cv_lib_ipc_shmat=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-echo "$as_me:$LINENO: result: $ac_cv_lib_ipc_shmat" >&5
-echo "${ECHO_T}$ac_cv_lib_ipc_shmat" >&6
-if test $ac_cv_lib_ipc_shmat = yes; then
-  X_EXTRA_LIBS="$X_EXTRA_LIBS -lipc"
-fi
-
-    fi
-  fi
-
-  # Check for libraries that X11R6 Xt/Xaw programs need.
-  ac_save_LDFLAGS=$LDFLAGS
-  test -n "$x_libraries" && LDFLAGS="$LDFLAGS -L$x_libraries"
-  # SM needs ICE to (dynamically) link under SunOS 4.x (so we have to
-  # check for ICE first), but we must link in the order -lSM -lICE or
-  # we get undefined symbols.  So assume we have SM if we have ICE.
-  # These have to be linked with before -lX11, unlike the other
-  # libraries we check for below, so use a different variable.
-  # John Interrante, Karl Berry
-  echo "$as_me:$LINENO: checking for IceConnectionNumber in -lICE" >&5
-echo $ECHO_N "checking for IceConnectionNumber in -lICE... $ECHO_C" >&6
-if test "${ac_cv_lib_ICE_IceConnectionNumber+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-lICE $X_EXTRA_LIBS $LIBS"
-cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-#include "confdefs.h"
-
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char IceConnectionNumber ();
-#ifdef F77_DUMMY_MAIN
-#  ifdef __cplusplus
-     extern "C"
-#  endif
-   int F77_DUMMY_MAIN() { return 1; }
-#endif
-int
-main ()
-{
-IceConnectionNumber ();
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_lib_ICE_IceConnectionNumber=yes
-else
-  echo "$as_me: failed program was:" >&5
-cat conftest.$ac_ext >&5
-ac_cv_lib_ICE_IceConnectionNumber=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-echo "$as_me:$LINENO: result: $ac_cv_lib_ICE_IceConnectionNumber" >&5
-echo "${ECHO_T}$ac_cv_lib_ICE_IceConnectionNumber" >&6
-if test $ac_cv_lib_ICE_IceConnectionNumber = yes; then
-  X_PRE_LIBS="$X_PRE_LIBS -lSM -lICE"
-fi
-
-  LDFLAGS=$ac_save_LDFLAGS
-
-fi
-
-      if test "x$no_x" = "xyes"; then
-        { { echo "$as_me:$LINENO: error: Configure could not find required X11 libraries" >&5
-echo "$as_me: error: Configure could not find required X11 libraries" >&2;}
-   { (exit aborting. Try --disable-gui?); exit aborting. Try --disable-gui?; }; }
-      fi
-      GL_LIB=""
-      echo "$as_me:$LINENO: checking for ANSI C header files" >&5
-echo $ECHO_N "checking for ANSI C header files... $ECHO_C" >&6
-if test "${ac_cv_header_stdc+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-#include "confdefs.h"
-#include <stdlib.h>
-#include <stdarg.h>
-#include <string.h>
-#include <float.h>
-
-_ACEOF
-if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
-  (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
-  ac_status=$?
-  egrep -v '^ *\+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } >/dev/null; then
-  if test -s conftest.err; then
-    ac_cpp_err=$ac_cxx_preproc_warn_flag
-  else
-    ac_cpp_err=
-  fi
-else
-  ac_cpp_err=yes
-fi
-if test -z "$ac_cpp_err"; then
-  ac_cv_header_stdc=yes
-else
-  echo "$as_me: failed program was:" >&5
-  cat conftest.$ac_ext >&5
-  ac_cv_header_stdc=no
-fi
-rm -f conftest.err conftest.$ac_ext
-
-if test $ac_cv_header_stdc = yes; then
-  # SunOS 4.x string.h does not declare mem*, contrary to ANSI.
-  cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-#include "confdefs.h"
-#include <string.h>
-
-_ACEOF
-if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
-  egrep "memchr" >/dev/null 2>&1; then
-  :
-else
-  ac_cv_header_stdc=no
-fi
-rm -f conftest*
-
-fi
-
-if test $ac_cv_header_stdc = yes; then
-  # ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI.
-  cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-#include "confdefs.h"
-#include <stdlib.h>
-
-_ACEOF
-if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
-  egrep "free" >/dev/null 2>&1; then
-  :
-else
-  ac_cv_header_stdc=no
-fi
-rm -f conftest*
-
-fi
-
-if test $ac_cv_header_stdc = yes; then
-  # /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi.
-  if test "$cross_compiling" = yes; then
-  :
-else
-  cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-#include "confdefs.h"
-#include <ctype.h>
-#if ((' ' & 0x0FF) == 0x020)
-# define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
-# define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
-#else
-# define ISLOWER(c) (('a' <= (c) && (c) <= 'i') \
-                     || ('j' <= (c) && (c) <= 'r') \
-                     || ('s' <= (c) && (c) <= 'z'))
-# define TOUPPER(c) (ISLOWER(c) ? ((c) | 0x40) : (c))
-#endif
-
-#define XOR(e, f) (((e) && !(f)) || (!(e) && (f)))
-int
-main ()
-{
-  int i;
-  for (i = 0; i < 256; i++)
-    if (XOR (islower (i), ISLOWER (i))
-        || toupper (i) != TOUPPER (i))
-      exit(2);
-  exit (0);
-}
-_ACEOF
-rm -f conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } && { ac_try='./conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  :
-else
-  echo "$as_me: program exited with status $ac_status" >&5
-echo "$as_me: failed program was:" >&5
-cat conftest.$ac_ext >&5
-( exit $ac_status )
-ac_cv_header_stdc=no
-fi
-rm -f core core.* *.core conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext
-fi
-fi
-fi
-echo "$as_me:$LINENO: result: $ac_cv_header_stdc" >&5
-echo "${ECHO_T}$ac_cv_header_stdc" >&6
-if test $ac_cv_header_stdc = yes; then
-
-cat >>confdefs.h <<\_ACEOF
-#define STDC_HEADERS 1
-_ACEOF
-
-fi
-
-# On IRIX 5.3, sys/types and inttypes.h are conflicting.
-
-
-
-
-
-
-
-
-
-for ac_header in sys/types.h sys/stat.h stdlib.h string.h memory.h strings.h \
-                  inttypes.h stdint.h unistd.h
-do
-as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh`
-echo "$as_me:$LINENO: checking for $ac_header" >&5
-echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6
-if eval "test \"\${$as_ac_Header+set}\" = set"; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-#include "confdefs.h"
-$ac_includes_default
-
-#include <$ac_header>
-_ACEOF
-rm -f conftest.$ac_objext
-if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
-  (eval $ac_compile) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest.$ac_objext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  eval "$as_ac_Header=yes"
-else
-  echo "$as_me: failed program was:" >&5
-cat conftest.$ac_ext >&5
-eval "$as_ac_Header=no"
-fi
-rm -f conftest.$ac_objext conftest.$ac_ext
-fi
-echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5
-echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6
-if test `eval echo '${'$as_ac_Header'}'` = yes; then
-  cat >>confdefs.h <<_ACEOF
-#define `echo "HAVE_$ac_header" | $as_tr_cpp` 1
-_ACEOF
-
-fi
-
-done
-
-
-if test "${ac_cv_header_GL_gl_h+set}" = set; then
-  echo "$as_me:$LINENO: checking for GL/gl.h" >&5
-echo $ECHO_N "checking for GL/gl.h... $ECHO_C" >&6
-if test "${ac_cv_header_GL_gl_h+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-fi
-echo "$as_me:$LINENO: result: $ac_cv_header_GL_gl_h" >&5
-echo "${ECHO_T}$ac_cv_header_GL_gl_h" >&6
-else
-  # Is the header compilable?
-echo "$as_me:$LINENO: checking GL/gl.h usability" >&5
-echo $ECHO_N "checking GL/gl.h usability... $ECHO_C" >&6
-cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-#include "confdefs.h"
-$ac_includes_default
-#include <GL/gl.h>
-_ACEOF
-rm -f conftest.$ac_objext
-if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
-  (eval $ac_compile) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest.$ac_objext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_header_compiler=yes
-else
-  echo "$as_me: failed program was:" >&5
-cat conftest.$ac_ext >&5
-ac_header_compiler=no
-fi
-rm -f conftest.$ac_objext conftest.$ac_ext
-echo "$as_me:$LINENO: result: $ac_header_compiler" >&5
-echo "${ECHO_T}$ac_header_compiler" >&6
-
-# Is the header present?
-echo "$as_me:$LINENO: checking GL/gl.h presence" >&5
-echo $ECHO_N "checking GL/gl.h presence... $ECHO_C" >&6
-cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-#include "confdefs.h"
-#include <GL/gl.h>
-_ACEOF
-if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
-  (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
-  ac_status=$?
-  egrep -v '^ *\+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } >/dev/null; then
-  if test -s conftest.err; then
-    ac_cpp_err=$ac_cxx_preproc_warn_flag
-  else
-    ac_cpp_err=
-  fi
-else
-  ac_cpp_err=yes
-fi
-if test -z "$ac_cpp_err"; then
-  ac_header_preproc=yes
-else
-  echo "$as_me: failed program was:" >&5
-  cat conftest.$ac_ext >&5
-  ac_header_preproc=no
-fi
-rm -f conftest.err conftest.$ac_ext
-echo "$as_me:$LINENO: result: $ac_header_preproc" >&5
-echo "${ECHO_T}$ac_header_preproc" >&6
-
-# So?  What about this header?
-case $ac_header_compiler:$ac_header_preproc in
-  yes:no )
-    { echo "$as_me:$LINENO: WARNING: GL/gl.h: accepted by the compiler, rejected by the preprocessor!" >&5
-echo "$as_me: WARNING: GL/gl.h: accepted by the compiler, rejected by the preprocessor!" >&2;}
-    { echo "$as_me:$LINENO: WARNING: GL/gl.h: proceeding with the preprocessor's result" >&5
-echo "$as_me: WARNING: GL/gl.h: proceeding with the preprocessor's result" >&2;};;
-  no:yes )
-    { echo "$as_me:$LINENO: WARNING: GL/gl.h: present but cannot be compiled" >&5
-echo "$as_me: WARNING: GL/gl.h: present but cannot be compiled" >&2;}
-    { echo "$as_me:$LINENO: WARNING: GL/gl.h: check for missing prerequisite headers?" >&5
-echo "$as_me: WARNING: GL/gl.h: check for missing prerequisite headers?" >&2;}
-    { echo "$as_me:$LINENO: WARNING: GL/gl.h: proceeding with the preprocessor's result" >&5
-echo "$as_me: WARNING: GL/gl.h: proceeding with the preprocessor's result" >&2;};;
-esac
-echo "$as_me:$LINENO: checking for GL/gl.h" >&5
-echo $ECHO_N "checking for GL/gl.h... $ECHO_C" >&6
-if test "${ac_cv_header_GL_gl_h+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  ac_cv_header_GL_gl_h=$ac_header_preproc
-fi
-echo "$as_me:$LINENO: result: $ac_cv_header_GL_gl_h" >&5
-echo "${ECHO_T}$ac_cv_header_GL_gl_h" >&6
-
-fi
-if test $ac_cv_header_GL_gl_h = yes; then
-  echo "$as_me:$LINENO: checking for glXMakeCurrent in -lGL" >&5
-echo $ECHO_N "checking for glXMakeCurrent in -lGL... $ECHO_C" >&6
-if test "${ac_cv_lib_GL_glXMakeCurrent+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-lGL -lm $LIBS"
-cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-#include "confdefs.h"
-
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char glXMakeCurrent ();
-#ifdef F77_DUMMY_MAIN
-#  ifdef __cplusplus
-     extern "C"
-#  endif
-   int F77_DUMMY_MAIN() { return 1; }
-#endif
-int
-main ()
-{
-glXMakeCurrent ();
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_lib_GL_glXMakeCurrent=yes
-else
-  echo "$as_me: failed program was:" >&5
-cat conftest.$ac_ext >&5
-ac_cv_lib_GL_glXMakeCurrent=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-echo "$as_me:$LINENO: result: $ac_cv_lib_GL_glXMakeCurrent" >&5
-echo "${ECHO_T}$ac_cv_lib_GL_glXMakeCurrent" >&6
-if test $ac_cv_lib_GL_glXMakeCurrent = yes; then
-  GL_LIB="-lGL"
-else
-  echo "$as_me:$LINENO: checking for glXMakeCurrent in -lMesaGL" >&5
-echo $ECHO_N "checking for glXMakeCurrent in -lMesaGL... $ECHO_C" >&6
-if test "${ac_cv_lib_MesaGL_glXMakeCurrent+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-lMesaGL -lm $LIBS"
-cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-#include "confdefs.h"
-
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char glXMakeCurrent ();
-#ifdef F77_DUMMY_MAIN
-#  ifdef __cplusplus
-     extern "C"
-#  endif
-   int F77_DUMMY_MAIN() { return 1; }
-#endif
-int
-main ()
-{
-glXMakeCurrent ();
-  ;
-  return 0;
-}
-_ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_cv_lib_MesaGL_glXMakeCurrent=yes
-else
-  echo "$as_me: failed program was:" >&5
-cat conftest.$ac_ext >&5
-ac_cv_lib_MesaGL_glXMakeCurrent=no
-fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-echo "$as_me:$LINENO: result: $ac_cv_lib_MesaGL_glXMakeCurrent" >&5
-echo "${ECHO_T}$ac_cv_lib_MesaGL_glXMakeCurrent" >&6
-if test $ac_cv_lib_MesaGL_glXMakeCurrent = yes; then
-  GL_LIB="-lMesaGL"
-fi
-
+  ac_cv_header_stdc=no
 fi
-
+rm -f conftest*
 
 fi
 
-
-      GLU_LIB=""
-      if test "${ac_cv_header_GL_glu_h+set}" = set; then
-  echo "$as_me:$LINENO: checking for GL/glu.h" >&5
-echo $ECHO_N "checking for GL/glu.h... $ECHO_C" >&6
-if test "${ac_cv_header_GL_glu_h+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-fi
-echo "$as_me:$LINENO: result: $ac_cv_header_GL_glu_h" >&5
-echo "${ECHO_T}$ac_cv_header_GL_glu_h" >&6
-else
-  # Is the header compilable?
-echo "$as_me:$LINENO: checking GL/glu.h usability" >&5
-echo $ECHO_N "checking GL/glu.h usability... $ECHO_C" >&6
-cat >conftest.$ac_ext <<_ACEOF
+if test $ac_cv_header_stdc = yes; then
+  # ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI.
+  cat >conftest.$ac_ext <<_ACEOF
 #line $LINENO "configure"
 #include "confdefs.h"
-$ac_includes_default
-#include <GL/glu.h>
-_ACEOF
-rm -f conftest.$ac_objext
-if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
-  (eval $ac_compile) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest.$ac_objext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_header_compiler=yes
-else
-  echo "$as_me: failed program was:" >&5
-cat conftest.$ac_ext >&5
-ac_header_compiler=no
-fi
-rm -f conftest.$ac_objext conftest.$ac_ext
-echo "$as_me:$LINENO: result: $ac_header_compiler" >&5
-echo "${ECHO_T}$ac_header_compiler" >&6
+#include <stdlib.h>
 
-# Is the header present?
-echo "$as_me:$LINENO: checking GL/glu.h presence" >&5
-echo $ECHO_N "checking GL/glu.h presence... $ECHO_C" >&6
-cat >conftest.$ac_ext <<_ACEOF
-#line $LINENO "configure"
-#include "confdefs.h"
-#include <GL/glu.h>
 _ACEOF
-if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
-  (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
-  ac_status=$?
-  egrep -v '^ *\+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } >/dev/null; then
-  if test -s conftest.err; then
-    ac_cpp_err=$ac_cxx_preproc_warn_flag
-  else
-    ac_cpp_err=
-  fi
-else
-  ac_cpp_err=yes
-fi
-if test -z "$ac_cpp_err"; then
-  ac_header_preproc=yes
-else
-  echo "$as_me: failed program was:" >&5
-  cat conftest.$ac_ext >&5
-  ac_header_preproc=no
-fi
-rm -f conftest.err conftest.$ac_ext
-echo "$as_me:$LINENO: result: $ac_header_preproc" >&5
-echo "${ECHO_T}$ac_header_preproc" >&6
-
-# So?  What about this header?
-case $ac_header_compiler:$ac_header_preproc in
-  yes:no )
-    { echo "$as_me:$LINENO: WARNING: GL/glu.h: accepted by the compiler, rejected by the preprocessor!" >&5
-echo "$as_me: WARNING: GL/glu.h: accepted by the compiler, rejected by the preprocessor!" >&2;}
-    { echo "$as_me:$LINENO: WARNING: GL/glu.h: proceeding with the preprocessor's result" >&5
-echo "$as_me: WARNING: GL/glu.h: proceeding with the preprocessor's result" >&2;};;
-  no:yes )
-    { echo "$as_me:$LINENO: WARNING: GL/glu.h: present but cannot be compiled" >&5
-echo "$as_me: WARNING: GL/glu.h: present but cannot be compiled" >&2;}
-    { echo "$as_me:$LINENO: WARNING: GL/glu.h: check for missing prerequisite headers?" >&5
-echo "$as_me: WARNING: GL/glu.h: check for missing prerequisite headers?" >&2;}
-    { echo "$as_me:$LINENO: WARNING: GL/glu.h: proceeding with the preprocessor's result" >&5
-echo "$as_me: WARNING: GL/glu.h: proceeding with the preprocessor's result" >&2;};;
-esac
-echo "$as_me:$LINENO: checking for GL/glu.h" >&5
-echo $ECHO_N "checking for GL/glu.h... $ECHO_C" >&6
-if test "${ac_cv_header_GL_glu_h+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  egrep "free" >/dev/null 2>&1; then
+  :
 else
-  ac_cv_header_GL_glu_h=$ac_header_preproc
-fi
-echo "$as_me:$LINENO: result: $ac_cv_header_GL_glu_h" >&5
-echo "${ECHO_T}$ac_cv_header_GL_glu_h" >&6
-
+  ac_cv_header_stdc=no
 fi
-if test $ac_cv_header_GL_glu_h = yes; then
-  if test "x$ac_cv_lib_GL_glXMakeCurrent" = "xyes"; then
-                        GLU_LIB="-lGLU"
-                      fi
-                      if test "x$ac_cv_lib_MesaGL_glXMakeCurrent" = "xyes"; then
-                        GLU_LIB="-lMesaGLU"
-                      fi
+rm -f conftest*
 
 fi
 
-
-      if test "x${GL_LIB}" = "x" -o "x${GLU_LIB}" = "x"; then
-        { { echo "$as_me:$LINENO: error: Configure could not find required OpenGL libraries" >&5
-echo "$as_me: error: Configure could not find required OpenGL libraries" >&2;}
-   { (exit aborting. Try --disable-gui?); exit aborting. Try --disable-gui?; }; }
-      fi
-      if test "x${GL_PREFIX}" != "x"; then
-         GL_LIB="-L${GL_PREFIX}/lib ${GL_LIB}"
-      fi
-      GMSH_LIBS="${GMSH_LIBS} ${FLTK_LIB_PREFIX} -lfltk_gl ${GL_LIB} ${GLU_LIB} -lfltk ${X_LIBS} -lXext -lX11 ${X_EXTRA_LIBS} -lm"
-      if test "x$x_includes" != x; then
-        ac_cpp="$ac_cpp -I$x_includes"
-      fi
-    else
-      GMSH_LIBS="${GMSH_LIBS} -lm";
-    fi
-
-    case "${UNAME}" in
-      Linux*)
-        OPT_FLAGS="-O3 -Wall -Wno-uninitialized"
-        OS_FLAGS="-D_LITTLE_ENDIAN"
-        GMSH_LIBS="${GMSH_LIBS} -ldl"
-      ;;
-      OSF1*)
-        OPT_FLAGS="-O2"
-        OS_FLAGS="-D_LITTLE_ENDIAN"
-      ;;
-      AIX*)
-        OPT_FLAGS="-O2"
-        OS_FLAGS="-D_BSD -D_NODLL"
-      ;;
-      IRIX*)
-        CXX="CC"
-        CC="cc"
-        OPT_FLAGS="-O2 -OPT:Olimit=0 -LANG:std"
-        AR="CC -mips3 -n32 -ar -o"
-        OS_FLAGS="-mips3 -n32"
-        LINKER="CC -O2 -mips3 -n32"
-      ;;
-      SunOS*)
-        CXX="g++"
-        CC="gcc"
-        OPT_FLAGS="-O2"
-        OS_FLAGS="-D_NODLL"
-        GMSH_LIBS="${GMSH_LIBS} -lsocket -lnsl -ldl"
-      ;;
-      *)
-        OS_FLAGS="-D_NODLL"
-      ;;
-    esac
-  ;;
-
-esac
-
-
-
-
-
-
-
-
-
-if test "x${GSL_PREFIX}" = "x"; then
-  LDFLAGS="-lgslcblas"
-else
-  LDFLAGS="-L${GSL_PREFIX}/lib -lgslcblas"
-fi
-echo "$as_me:$LINENO: checking for gsl_vector_alloc in -lgsl" >&5
-echo $ECHO_N "checking for gsl_vector_alloc in -lgsl... $ECHO_C" >&6
-if test "${ac_cv_lib_gsl_gsl_vector_alloc+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
+if test $ac_cv_header_stdc = yes; then
+  # /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi.
+  if test "$cross_compiling" = yes; then
+  :
 else
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-lgsl  $LIBS"
-cat >conftest.$ac_ext <<_ACEOF
+  cat >conftest.$ac_ext <<_ACEOF
 #line $LINENO "configure"
 #include "confdefs.h"
-
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char gsl_vector_alloc ();
-#ifdef F77_DUMMY_MAIN
-#  ifdef __cplusplus
-     extern "C"
-#  endif
-   int F77_DUMMY_MAIN() { return 1; }
+#include <ctype.h>
+#if ((' ' & 0x0FF) == 0x020)
+# define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
+# define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
+#else
+# define ISLOWER(c) (('a' <= (c) && (c) <= 'i') \
+                     || ('j' <= (c) && (c) <= 'r') \
+                     || ('s' <= (c) && (c) <= 'z'))
+# define TOUPPER(c) (ISLOWER(c) ? ((c) | 0x40) : (c))
 #endif
+
+#define XOR(e, f) (((e) && !(f)) || (!(e) && (f)))
 int
 main ()
 {
-gsl_vector_alloc ();
-  ;
-  return 0;
+  int i;
+  for (i = 0; i < 256; i++)
+    if (XOR (islower (i), ISLOWER (i))
+        || toupper (i) != TOUPPER (i))
+      exit(2);
+  exit (0);
 }
 _ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
+rm -f conftest$ac_exeext
 if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
   (eval $ac_link) 2>&5
   ac_status=$?
   echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
+  (exit $ac_status); } && { ac_try='./conftest$ac_exeext'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
   echo "$as_me:$LINENO: \$? = $ac_status" >&5
   (exit $ac_status); }; }; then
-  ac_cv_lib_gsl_gsl_vector_alloc=yes
+  :
 else
-  echo "$as_me: failed program was:" >&5
+  echo "$as_me: program exited with status $ac_status" >&5
+echo "$as_me: failed program was:" >&5
 cat conftest.$ac_ext >&5
-ac_cv_lib_gsl_gsl_vector_alloc=no
+( exit $ac_status )
+ac_cv_header_stdc=no
 fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
+rm -f core core.* *.core conftest$ac_exeext conftest.$ac_objext conftest.$ac_ext
 fi
-echo "$as_me:$LINENO: result: $ac_cv_lib_gsl_gsl_vector_alloc" >&5
-echo "${ECHO_T}$ac_cv_lib_gsl_gsl_vector_alloc" >&6
-if test $ac_cv_lib_gsl_gsl_vector_alloc = yes; then
-  GSL="yes"
-else
-  GSL="no"
 fi
+fi
+echo "$as_me:$LINENO: result: $ac_cv_header_stdc" >&5
+echo "${ECHO_T}$ac_cv_header_stdc" >&6
+if test $ac_cv_header_stdc = yes; then
+
+cat >>confdefs.h <<\_ACEOF
+#define STDC_HEADERS 1
+_ACEOF
 
-if test "x${GSL_PREFIX}" = "x"; then
-  GSL_LIBS="-lgsl -lgslcblas"
-else
-  GSL_LIBS="-L${GSL_PREFIX}/lib -lgsl -lgslcblas"
-  GSL_INCLUDE="-I${GSL_PREFIX}/include"
 fi
 
+# On IRIX 5.3, sys/types and inttypes.h are conflicting.
+
+
+
+
 
 
 
-echo "$as_me:$LINENO: checking for sin in -lm" >&5
-echo $ECHO_N "checking for sin in -lm... $ECHO_C" >&6
-if test "${ac_cv_lib_m_sin+set}" = set; then
+
+
+for ac_header in sys/types.h sys/stat.h stdlib.h string.h memory.h strings.h \
+                  inttypes.h stdint.h unistd.h
+do
+as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh`
+echo "$as_me:$LINENO: checking for $ac_header" >&5
+echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6
+if eval "test \"\${$as_ac_Header+set}\" = set"; then
   echo $ECHO_N "(cached) $ECHO_C" >&6
 else
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-lm  $LIBS"
-cat >conftest.$ac_ext <<_ACEOF
+  cat >conftest.$ac_ext <<_ACEOF
 #line $LINENO "configure"
 #include "confdefs.h"
+$ac_includes_default
 
-/* Override any gcc2 internal prototype to avoid an error.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-/* We use char because int might match the return type of a gcc2
-   builtin and then its argument prototype would still apply.  */
-char sin ();
-#ifdef F77_DUMMY_MAIN
-#  ifdef __cplusplus
-     extern "C"
-#  endif
-   int F77_DUMMY_MAIN() { return 1; }
-#endif
-int
-main ()
-{
-sin ();
-  ;
-  return 0;
-}
+#include <$ac_header>
 _ACEOF
-rm -f conftest.$ac_objext conftest$ac_exeext
-if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
-  (eval $ac_link) 2>&5
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>&5
   ac_status=$?
   echo "$as_me:$LINENO: \$? = $ac_status" >&5
   (exit $ac_status); } &&
-         { ac_try='test -s conftest$ac_exeext'
+         { ac_try='test -s conftest.$ac_objext'
   { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
   (eval $ac_try) 2>&5
   ac_status=$?
   echo "$as_me:$LINENO: \$? = $ac_status" >&5
   (exit $ac_status); }; }; then
-  ac_cv_lib_m_sin=yes
+  eval "$as_ac_Header=yes"
 else
   echo "$as_me: failed program was:" >&5
 cat conftest.$ac_ext >&5
-ac_cv_lib_m_sin=no
+eval "$as_ac_Header=no"
 fi
-rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
+rm -f conftest.$ac_objext conftest.$ac_ext
 fi
-echo "$as_me:$LINENO: result: $ac_cv_lib_m_sin" >&5
-echo "${ECHO_T}$ac_cv_lib_m_sin" >&6
-if test $ac_cv_lib_m_sin = yes; then
+echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5
+echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6
+if test `eval echo '${'$as_ac_Header'}'` = yes; then
   cat >>confdefs.h <<_ACEOF
-#define HAVE_LIBM 1
+#define `echo "HAVE_$ac_header" | $as_tr_cpp` 1
 _ACEOF
 
-  LIBS="-lm $LIBS"
-
 fi
 
+done
+
 
 
 
@@ -5599,13 +4092,9 @@ s,@CPP@,$CPP,;t t
 s,@RANLIB@,$RANLIB,;t t
 s,@ac_ct_RANLIB@,$ac_ct_RANLIB,;t t
 s,@AR@,$AR,;t t
+s,@FLTKCONFIG@,$FLTKCONFIG,;t t
 s,@VERSION_FLAGS@,$VERSION_FLAGS,;t t
 s,@GUI_INCLUDE@,$GUI_INCLUDE,;t t
-s,@CXXCPP@,$CXXCPP,;t t
-s,@X_CFLAGS@,$X_CFLAGS,;t t
-s,@X_PRE_LIBS@,$X_PRE_LIBS,;t t
-s,@X_LIBS@,$X_LIBS,;t t
-s,@X_EXTRA_LIBS@,$X_EXTRA_LIBS,;t t
 s,@OPT_FLAGS@,$OPT_FLAGS,;t t
 s,@OS_FLAGS@,$OS_FLAGS,;t t
 s,@LINKER@,$LINKER,;t t
@@ -5614,6 +4103,7 @@ s,@GMSH_LIBS@,$GMSH_LIBS,;t t
 s,@POSTBUILD@,$POSTBUILD,;t t
 s,@GSL_LIBS@,$GSL_LIBS,;t t
 s,@GSL_INCLUDE@,$GSL_INCLUDE,;t t
+s,@CXXCPP@,$CXXCPP,;t t
 CEOF
 
 _ACEOF
@@ -5867,5 +4357,3 @@ if test "x${GSL}" = "xno"; then
   echo "  http://sources.redhat.com/gsl/"
   echo "*******************************************************************"
 fi
-
-
diff --git a/configure.in b/configure.in
index 9b57f7838d18a39b2e2571fd485bcc460044a914..2e8c77fcd734139cb736a7156926e3f2e3105190 100644
--- a/configure.in
+++ b/configure.in
@@ -1,4 +1,4 @@
-dnl "$Id: configure.in,v 1.4 2003-02-11 17:55:23 geuzaine Exp $"
+dnl "$Id: configure.in,v 1.5 2003-02-11 22:01:43 geuzaine Exp $"
 dnl
 dnl Machine independent configuration script for Gmsh.
 dnl
@@ -35,10 +35,6 @@ AC_ARG_WITH(fltk-prefix,
             AC_HELP_STRING([--with-fltk-prefix=PFX],
                            [prefix where FLTK is installed]),
             [FLTK_PREFIX=$withval],[FLTK_PREFIX="$FLTK_DIR"])
-AC_ARG_WITH(gl-prefix,
-            AC_HELP_STRING([--with-gl-prefix=PFX],
-                           [prefix where OpenGL is installed]),
-            [GL_PREFIX=$withval],[GL_PREFIX="$GL_DIR"])
 
 dnl Parse --enable command line options
 AC_ARG_ENABLE(gui,
@@ -78,7 +74,7 @@ AC_EXEEXT
 
 dnl How to build static libraries
 if test "x${AR}" = "x:"; then
-  AC_MSG_ERROR(Configure could not find the library archiver, aborting.)
+  AC_MSG_ERROR(Could not find the library archiver, aborting.)
 fi
 AR="${AR} ruvs"
 
@@ -89,30 +85,24 @@ dnl Choose blackbox or GUI version
 if test "x$enable_gui" != "xno"; then
   GMSH_DIRS="${GMSH_DIRS} Graphics Fltk jpeg"
   GMSH_LIBS="-Llib -lGmshFltk -lGmshParser -lGmshGraphics -lGmshMesh -lGmshGeo -lGmshNumeric -lGmshCommon -lGmshDataStr -lGmshJpeg -lGmshPlugin -lGmshParallel"
-
-#  dnl We should check for FLTK like this:
-#  AC_PATH_PROG(FLTKCONFIG,fltk-config)
-#
-#  if test "x$FLTKCONFIG" = x; then
-#    AC_MSG_ERROR([Sorry, flphoto requires FLTK 1.1.x.])
-#  else
-#    CFLAGS="`$FLTKCONFIG --cflags` $CFLAGS"
-#    CXXFLAGS="`$FLTKCONFIG --cflags` $CXXFLAGS"
-#    LIBS="`$FLTKCONFIG --use-images --ldflags` $LIBS"
-#  fi
-
   VERSION_FLAGS="-D_FLTK"
-  if test "x${FLTK_PREFIX}" != "x"; then
-    FLTK_LIB_PREFIX="-L${FLTK_PREFIX}/lib"
-    GUI_INCLUDE="-I${FLTK_PREFIX}"
+  AC_PATH_PROG(FLTKCONFIG,fltk-config)
+  if test "x${FLTKCONFIG}" = "x" -a "x${FLTK_PREFIX}" != "x" ; then
+    AC_PATH_PROG(FLTKCONFIG,fltk-config,"",${FLTK_PREFIX})
   fi
-  if test "x${GL_PREFIX}" != "x"; then
-    GUI_INCLUDE="${GUI_INCLUDE} -I${GL_PREFIX}/include"
+  if test "x${FLTKCONFIG}" = "x" ; then
+    AC_PATH_PROG(FLTKCONFIG,fltk-config,"",${HOME}/SOURCES/fltk-1.1)
   fi
+  if test "x$FLTKCONFIG" = "x"; then
+    AC_MSG_ERROR(Could not find fltk-config. Try --with-prefix-fltk?)
+  fi
+  GUI_LIBS="`$FLTKCONFIG --use-gl --ldstaticflags`"
+  GUI_INCLUDE="`$FLTKCONFIG --use-gl --cxxflags`"
 else
   GMSH_DIRS="${GMSH_DIRS} Box"
   GMSH_LIBS="-Llib -lGmshBox -lGmshParser -lGmshMesh -lGmshGeo -lGmshNumeric -lGmshPlugin -lGmshCommon -lGmshDataStr -lGmshParallel"
   VERSION_FLAGS="-D_BLACKBOX"
+  GUI_LIBS=""
   GUI_INCLUDE=""
 fi
 
@@ -136,101 +126,60 @@ dnl default flags and linker
 OPT_FLAGS="${CXXFLAGS}"
 LINKER="${CXX}"
 POSTBUILD=""
+if test "x$enable_gui" != "xno"; then
+  GMSH_LIBS="${GMSH_LIBS} ${GUI_LIBS}"
+else
+  GMSH_LIBS="${GMSH_LIBS} -lm";
+fi
 
 dnl Modify defaults according to OS
 case "$UNAME" in
 
   CYGWIN* | MINGW*)
-    OPT_FLAGS="-O2"
     OS_FLAGS="-mwindows -DWIN32 -D_LITTLE_ENDIAN"
     LINKER="g++ -Wl,--subsystem,windows -mwindows"
     if test "x$enable_gui" != "xno"; then
-      GMSH_LIBS="${GMSH_LIBS} Fltk/Win32Icon.res ${FLTK_LIB_PREFIX} -lfltk_gl -lglu32 -lopengl32 -lfltk -lole32 -luuid -lcomctl32 -lwsock32 -lm"
-    else
-      GMSH_LIBS="${GMSH_LIBS} -lm"
+      GMSH_LIBS="${GMSH_LIBS} Fltk/Win32Icon.res"
     fi
     ;;
 
   Darwin*)
-    OPT_FLAGS="-O2"
     OS_FLAGS="-D_NODLL"
-    if test "x$enable_gui" != "xno"; then
-      GMSH_LIBS="${GMSH_LIBS} ${FLTK_LIB_PREFIX} -lfltk_gl -lfltk -framework AGL -framework OpenGL -framework Carbon -framework ApplicationServices"
-    else
-      GMSH_LIBS="${GMSH_LIBS}"
-    fi
     POSTBUILD="/Developer/Tools/Rez -t APPL -o bin/gmsh Fltk/MacRes.r"
     ;;
 
-  *)
-    if test "x$enable_gui" != "xno"; then
-      AC_PATH_XTRA
-      if test "x$no_x" = "xyes"; then
-        AC_MSG_ERROR(Configure could not find required X11 libraries, aborting. Try --disable-gui?)
-      fi
-      GL_LIB=""
-      AC_CHECK_HEADER(GL/gl.h,
-                      AC_CHECK_LIB(GL, glXMakeCurrent, GL_LIB="-lGL",
-                                   AC_CHECK_LIB(MesaGL, glXMakeCurrent, GL_LIB="-lMesaGL", , -lm),
-                                   -lm)
-                      )
-      GLU_LIB=""
-      AC_CHECK_HEADER(GL/glu.h,
-                      if test "x$ac_cv_lib_GL_glXMakeCurrent" = "xyes"; then
-                        GLU_LIB="-lGLU"
-                      fi
-                      if test "x$ac_cv_lib_MesaGL_glXMakeCurrent" = "xyes"; then
-                        GLU_LIB="-lMesaGLU"
-                      fi
-                      )
-      if test "x${GL_LIB}" = "x" -o "x${GLU_LIB}" = "x"; then
-        AC_MSG_ERROR(Configure could not find required OpenGL libraries, aborting. Try --disable-gui?)
-      fi
-      if test "x${GL_PREFIX}" != "x"; then
-         GL_LIB="-L${GL_PREFIX}/lib ${GL_LIB}"
-      fi
-      GMSH_LIBS="${GMSH_LIBS} ${FLTK_LIB_PREFIX} -lfltk_gl ${GL_LIB} ${GLU_LIB} -lfltk ${X_LIBS} -lXext -lX11 ${X_EXTRA_LIBS} -lm"
-      if test "x$x_includes" != x; then
-        ac_cpp="$ac_cpp -I$x_includes"
-      fi
-    else
-      GMSH_LIBS="${GMSH_LIBS} -lm";
-    fi
+  Linux*)
+    OS_FLAGS="-D_LITTLE_ENDIAN"
+    GMSH_LIBS="${GMSH_LIBS} -ldl"
+    ;;
 
-    case "${UNAME}" in
-      Linux*)
-        OPT_FLAGS="-O3 -Wall -Wno-uninitialized"
-        OS_FLAGS="-D_LITTLE_ENDIAN"
-        GMSH_LIBS="${GMSH_LIBS} -ldl"
-      ;;
-      OSF1*)
-        OPT_FLAGS="-O2"
-        OS_FLAGS="-D_LITTLE_ENDIAN"
-      ;;
-      AIX*)
-        OPT_FLAGS="-O2"
-        OS_FLAGS="-D_BSD -D_NODLL"
-      ;;
-      IRIX*)
-        CXX="CC"
-        CC="cc"
-        OPT_FLAGS="-O2 -OPT:Olimit=0 -LANG:std"
-        AR="CC -mips3 -n32 -ar -o"
-        OS_FLAGS="-mips3 -n32"
-        LINKER="CC -O2 -mips3 -n32"
-      ;;
-      SunOS*)
-        CXX="g++"
-        CC="gcc"
-        OPT_FLAGS="-O2"
-        OS_FLAGS="-D_NODLL"
-        GMSH_LIBS="${GMSH_LIBS} -lsocket -lnsl -ldl"
-      ;;
-      *)
-        OS_FLAGS="-D_NODLL"
-      ;;
-    esac
-  ;;
+  OSF1*)
+    OS_FLAGS="-D_LITTLE_ENDIAN"
+    ;;
+
+  AIX*)
+    OS_FLAGS="-D_BSD -D_NODLL"
+    ;;
+
+  IRIX*)
+    OS_FLAGS="-mips3 -n32" 
+    CXX="CC"
+    CC="cc"
+    OPT_FLAGS="-O2 -OPT:Olimit=0 -LANG:std"
+    AR="CC -mips3 -n32 -ar -o"
+    LINKER="CC -O2 -mips3 -n32"
+    ;;
+
+  SunOS*)
+    OS_FLAGS="-D_NODLL"
+    CXX="g++"
+    CC="gcc"
+    GMSH_LIBS="${GMSH_LIBS} -lsocket -lnsl -ldl"
+    ;;
+
+  *)
+    OS_FLAGS="-D_NODLL"
+    ;;
 
 esac
 
@@ -258,9 +207,6 @@ fi
 AC_SUBST(GSL_LIBS)
 AC_SUBST(GSL_INCLUDE)
 
-dnl Check for math library
-AC_CHECK_LIB(m, sin)
-
 dnl Check for header files
 AC_CHECK_HEADERS(sys/time.h sys/resource.h)
 
@@ -298,5 +244,3 @@ if test "x${GSL}" = "xno"; then
   echo "  http://sources.redhat.com/gsl/"
   echo "*******************************************************************"
 fi
-
-