[Flex-help] yy_push_state

[Marcel L. <ma...@la...>]

I'm trying to figure out exactly why I'm not getting a definition of
yy_push_state and yy_pop_state in my scanner. I can find the definitions in
flex.skl but I'm having problems discerning why they aren't being included
when I run flex on my lexical file.

See this example:

marcel@fantasma tmp $ flex -V
flex 2.5.35
marcel@fantasma tmp $ cat test.l 
%s TEST

%%
<INITIAL>{
    "foo" yy_push_state(TEST);
}
marcel@fantasma tmp $ flex -o test.cpp test.l
marcel@fantasma tmp $ grep 'push_state' test.cpp 
yy_push_state(TEST);
marcel@fantasma tmp $ cc test.cpp 
test.l: In function ‘int yylex()’:
test.l:5: error: ‘yy_push_state’ was not declared in this scope