gdb configure checks CFLAGS haven't changed. Sadly if CFLAGS have a double 
space in, this gets lost somewhere and convinces gdb the flags have changed.
Wipe out the test for now...

RP - 23/11/2007
---
 gdb/gdbserver/configure |    7 -------
 gdb/testsuite/configure |    7 -------
 2 files changed, 14 deletions(-)

Index: gdb-6.6/gdb/testsuite/configure
===================================================================
--- gdb-6.6.orig/gdb/testsuite/configure	2007-11-23 10:25:08.000000000 +0000
+++ gdb-6.6/gdb/testsuite/configure	2007-11-23 10:27:36.000000000 +0000
@@ -1271,13 +1271,6 @@ echo "$as_me:   current value: $ac_new_v
     esac
   fi
 done
-if $ac_cache_corrupted; then
-  { echo "$as_me:$LINENO: error: changes in the environment can compromise the build" >&5
-echo "$as_me: error: changes in the environment can compromise the build" >&2;}
-  { { echo "$as_me:$LINENO: error: run \`make distclean' and/or \`rm $cache_file' and start over" >&5
-echo "$as_me: error: run \`make distclean' and/or \`rm $cache_file' and start over" >&2;}
-   { (exit 1); exit 1; }; }
-fi
 
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
Index: gdb-6.6/gdb/gdbserver/configure
===================================================================
--- gdb-6.6.orig/gdb/gdbserver/configure	2007-11-23 10:29:06.000000000 +0000
+++ gdb-6.6/gdb/gdbserver/configure	2007-11-23 10:29:20.000000000 +0000
@@ -1262,13 +1262,6 @@ echo "$as_me:   current value: $ac_new_v
     esac
   fi
 done
-if $ac_cache_corrupted; then
-  { echo "$as_me:$LINENO: error: changes in the environment can compromise the build" >&5
-echo "$as_me: error: changes in the environment can compromise the build" >&2;}
-  { { echo "$as_me:$LINENO: error: run \`make distclean' and/or \`rm $cache_file' and start over" >&5
-echo "$as_me: error: run \`make distclean' and/or \`rm $cache_file' and start over" >&2;}
-   { (exit 1); exit 1; }; }
-fi
 
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'