Renamed the symbol for the cpp binary to avoid conflicts with
configure internals.

diff --git a/configure b/configure
index 2f44aaa..8674f3e 100755
--- a/configure
+++ b/configure
@@ -311,7 +311,7 @@
 # include <unistd.h>
 #endif"
 
-ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS WIN16_FILES WIN16_INSTALL build build_cpu build_vendor build_os host host_cpu host_vendor host_os SET_MAKE CC CFLAGS LDFLAGS CPPFLAGS ac_ct_CC EXEEXT OBJEXT CXX CXXFLAGS ac_ct_CXX CPP ac_ct_CPP TOOLSDIR X_CFLAGS X_PRE_LIBS X_LIBS X_EXTRA_LIBS YACC LEX LEXLIB LEX_OUTPUT_ROOT XYACC XLEX AS ac_ct_AS LD ac_ct_LD AR ac_ct_AR RANLIB ac_ct_RANLIB STRIP ac_ct_STRIP WINDRES ac_ct_WINDRES LN_S LN LDCONFIG INSTALL_PROGRAM INSTALL_SCRIPT INSTALL_DATA LINT LINTFLAGS DB2HTML DB2PDF DB2PS DB2TXT LIBPTHREAD JPEGLIB EGREP GIFLIB XLIB XFILES OPENGLFILES GLU32FILES OPENGL_LIBS GLUT_LIBS GLUT32FILES NASLIBS CURSESLIBS sane_devel SANELIBS SANEINCL ICULIBS ft_devel ft_devel2 FREETYPEINCL ARTSCCONFIG ARTSLIBS ARTSINCL ALSALIBS AUDIOIOLIBS CAPI4LINUXLIBS EXTRACFLAGS DLLEXT DLLFLAGS DLLIBS LDSHARED LDDLLFLAGS LIBEXT IMPLIBEXT DLLTOOL ac_ct_DLLTOOL DLLWRAP ac_ct_DLLWRAP LDEXECFLAGS CROSSTEST CROSSCC CROSSWINDRES LDPATH CRTLIBS WINE_BINARIES MAIN_BINARY LDD ALLOCA LIBOBJS LTLIBOBJS'
+ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS WIN16_FILES WIN16_INSTALL build build_cpu build_vendor build_os host host_cpu host_vendor host_os SET_MAKE CC CFLAGS LDFLAGS CPPFLAGS ac_ct_CC EXEEXT OBJEXT CXX CXXFLAGS ac_ct_CXX CPPBIN ac_ct_CPPBIN TOOLSDIR CPP X_CFLAGS X_PRE_LIBS X_LIBS X_EXTRA_LIBS YACC LEX LEXLIB LEX_OUTPUT_ROOT XYACC XLEX AS ac_ct_AS LD ac_ct_LD AR ac_ct_AR RANLIB ac_ct_RANLIB STRIP ac_ct_STRIP WINDRES ac_ct_WINDRES LN_S LN LDCONFIG INSTALL_PROGRAM INSTALL_SCRIPT INSTALL_DATA LINT LINTFLAGS DB2HTML DB2PDF DB2PS DB2TXT LIBPTHREAD JPEGLIB EGREP GIFLIB XLIB XFILES OPENGLFILES GLU32FILES OPENGL_LIBS GLUT_LIBS GLUT32FILES NASLIBS CURSESLIBS sane_devel SANELIBS SANEINCL ICULIBS ft_devel ft_devel2 FREETYPEINCL ARTSCCONFIG ARTSLIBS ARTSINCL ALSALIBS AUDIOIOLIBS CAPI4LINUXLIBS EXTRACFLAGS DLLEXT DLLFLAGS DLLIBS LDSHARED LDDLLFLAGS LIBEXT IMPLIBEXT DLLTOOL ac_ct_DLLTOOL DLLWRAP ac_ct_DLLWRAP LDEXECFLAGS CROSSTEST CROSSCC CROSSWINDRES LDPATH CRTLIBS WINE_BINARIES MAIN_BINARY LDD ALLOCA LIBOBJS LTLIBOBJS'
 ac_subst_files='MAKE_RULES MAKE_DLL_RULES MAKE_TEST_RULES MAKE_LIB_RULES MAKE_PROG_RULES'
 
 # Initialize some variables set by options.
@@ -2787,11 +2787,11 @@
 set dummy ${ac_tool_prefix}cpp; 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_prog_CPP+set}" = set; then
+if test "${ac_cv_prog_CPPBIN+set}" = set; then
   echo $ECHO_N "(cached) $ECHO_C" >&6
 else
-  if test -n "$CPP"; then
-  ac_cv_prog_CPP="$CPP" # Let the user override the test.
+  if test -n "$CPPBIN"; then
+  ac_cv_prog_CPPBIN="$CPPBIN" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
@@ -2800,7 +2800,7 @@
   test -z "$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_prog_CPP="${ac_tool_prefix}cpp"
+    ac_cv_prog_CPPBIN="${ac_tool_prefix}cpp"
     echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
@@ -2809,27 +2809,27 @@
 
 fi
 fi
-CPP=$ac_cv_prog_CPP
-if test -n "$CPP"; then
-  echo "$as_me:$LINENO: result: $CPP" >&5
-echo "${ECHO_T}$CPP" >&6
+CPPBIN=$ac_cv_prog_CPPBIN
+if test -n "$CPPBIN"; then
+  echo "$as_me:$LINENO: result: $CPPBIN" >&5
+echo "${ECHO_T}$CPPBIN" >&6
 else
   echo "$as_me:$LINENO: result: no" >&5
 echo "${ECHO_T}no" >&6
 fi
 
 fi
-if test -z "$ac_cv_prog_CPP"; then
-  ac_ct_CPP=$CPP
+if test -z "$ac_cv_prog_CPPBIN"; then
+  ac_ct_CPPBIN=$CPPBIN
   # Extract the first word of "cpp", so it can be a program name with args.
 set dummy cpp; 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_prog_ac_ct_CPP+set}" = set; then
+if test "${ac_cv_prog_ac_ct_CPPBIN+set}" = set; then
   echo $ECHO_N "(cached) $ECHO_C" >&6
 else
-  if test -n "$ac_ct_CPP"; then
-  ac_cv_prog_ac_ct_CPP="$ac_ct_CPP" # Let the user override the test.
+  if test -n "$ac_ct_CPPBIN"; then
+  ac_cv_prog_ac_ct_CPPBIN="$ac_ct_CPPBIN" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
@@ -2838,28 +2838,28 @@
   test -z "$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_prog_ac_ct_CPP="cpp"
+    ac_cv_prog_ac_ct_CPPBIN="cpp"
     echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
 done
 done
 
-  test -z "$ac_cv_prog_ac_ct_CPP" && ac_cv_prog_ac_ct_CPP="cpp"
+  test -z "$ac_cv_prog_ac_ct_CPPBIN" && ac_cv_prog_ac_ct_CPPBIN="cpp"
 fi
 fi
-ac_ct_CPP=$ac_cv_prog_ac_ct_CPP
-if test -n "$ac_ct_CPP"; then
-  echo "$as_me:$LINENO: result: $ac_ct_CPP" >&5
-echo "${ECHO_T}$ac_ct_CPP" >&6
+ac_ct_CPPBIN=$ac_cv_prog_ac_ct_CPPBIN
+if test -n "$ac_ct_CPPBIN"; then
+  echo "$as_me:$LINENO: result: $ac_ct_CPPBIN" >&5
+echo "${ECHO_T}$ac_ct_CPPBIN" >&6
 else
   echo "$as_me:$LINENO: result: no" >&5
 echo "${ECHO_T}no" >&6
 fi
 
-  CPP=$ac_ct_CPP
+  CPPBIN=$ac_ct_CPPBIN
 else
-  CPP="$ac_cv_prog_CPP"
+  CPPBIN="$ac_cv_prog_CPPBIN"
 fi
 
 
@@ -20155,9 +20155,10 @@
 s,@CXX@,$CXX,;t t
 s,@CXXFLAGS@,$CXXFLAGS,;t t
 s,@ac_ct_CXX@,$ac_ct_CXX,;t t
-s,@CPP@,$CPP,;t t
-s,@ac_ct_CPP@,$ac_ct_CPP,;t t
+s,@CPPBIN@,$CPPBIN,;t t
+s,@ac_ct_CPPBIN@,$ac_ct_CPPBIN,;t t
 s,@TOOLSDIR@,$TOOLSDIR,;t t
+s,@CPP@,$CPP,;t t
 s,@X_CFLAGS@,$X_CFLAGS,;t t
 s,@X_PRE_LIBS@,$X_PRE_LIBS,;t t
 s,@X_LIBS@,$X_LIBS,;t t