flex 2.5.27

[Pedro Kröger]

Hi,

did you guys had any trouble to compile cvs lilypond with flex 2.5.27? I
got something like 

`yy_start_stack_ptr' undeclared (first use this function)

I had to change lexer.ll from:

   (void) yy_start_stack_ptr;
   (void) yy_start_stack_depth;

to:

   int yy_start_stack_ptr;
   int yy_start_stack_depth;

in order to get it compiling. But I upgraded to flex 2.6.31 and the
problem disappeared.

Is this problem consistent? maybe we should say something in
INSTALL. Anyway, shouldn't flex and bison be listed as a requirement in
INSTALL?

Pedro Kröger