Class scanner using std:: namespace

[Peter Gostelow]

Hi,

After upgrading from gcc 2.95.3 to 3.2.2, g++ complains about ambiguous 
istream type. I tried changing the header to use iostream instead of 
iostream.h and include 'using namespace std;' plus a bunch of crazy things. 
Nothing works.

>From the g++ mailing lists using the std:: namespace has been around since 
1997, yet flex doesn't support it. I believe there are flex development 
versions later than 2.5.4, but haven't found their source.

What is the proper way to generate a flex 2.5.4 class scanner (using 
namespace), or where can I get a version that works with std:: namespace?

Thanks in advance,
Peter