norm_inf type-related error

From: cerenoc (julm_at_[hidden])
Date: 2003-06-05 00:50:09

Can somebody help me with this?  The following simple piece of code 
compiles fine if m, v, and s are declared as type <double> but not 
for type <int> as shown.  Why is that?  Can I cast vectors and 
matrices from int to double easily?

...define some matrix <int>m...
boost::numeric::ublas::vector<int> v = row(m, 1);
int s = norm_inf(v);

The complaint is as follows:

/tmp/ccA7KBD2.o: In function 
`boost::numeric::ublas::type_traits<int>::norm_inf(int const &)':
/tmp/ccA7KBD2.o
(.boost::numeric::ublas::type_traits<int>::gnu.linkonce.t.norm_inf
(int const &)+0x12): undefined reference to 
`boost::numeric::ublas::type_traits<int>::imag(int const &)'
/tmp/ccA7KBD2.o
(.boost::numeric::ublas::type_traits<int>::gnu.linkonce.t.norm_inf
(int const &)+0x21): undefined reference to 
`boost::numeric::ublas::type_traits<int>::abs(int const &)'
/tmp/ccA7KBD2.o
(.boost::numeric::ublas::type_traits<int>::gnu.linkonce.t.norm_inf
(int const &)+0x31): undefined reference to 
`boost::numeric::ublas::type_traits<int>::real(int const &)'
/tmp/ccA7KBD2.o
(.boost::numeric::ublas::type_traits<int>::gnu.linkonce.t.norm_inf
(int const &)+0x40): undefined reference to 
`boost::numeric::ublas::type_traits<int>::abs(int const &)'
collect2: ld returned 1 exit status

Thanks,

Julian