Trouble compiling. Thinks FlexLexer isn't there

[Pierre Abbat]

I'm trying to write a lilypond spell and running into this error while 
configuring:

configure:2783: checking for FlexLexer.h
configure:2793: c++ -E   conftest.C >/dev/null 2>conftest.out
In file included from /usr/include/c++/3.2.1/backward/iostream.h:31,
                 from /usr/include/FlexLexer.h:47,
                 from configure:2789:
/usr/include/c++/3.2.1/backward/backward_warning.h:32:2: warning: #warning 
This file includes at least one deprecated or ant
iquated header. Please consider using one of the 32 headers found in section 
17.4.1.2 of the C++ standard. Examples include
substituting the <X> header for the <X.h> header for C++ includes, or 
<sstream> instead of the deprecated header <strstream.
h>. To disable this warning use -Wno-deprecated.
configure: failed program was:
#line 2788 "configure"
#include "confdefs.h"
#include <FlexLexer.h>

I have the following versions:

address@hidden:~$ gaze version gcc flex lilypond
Section  Spell     Grimoire Version  Installed Version
-------  -----     ----------------  -----------------
devel    gcc       3.3               3.2.1
devel    flex      2.5.27            2.5.4a
local    lilypond  1.6.9             -

Do I need to upgrade something?

phma
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