After installing the new glibc (RHBA-2000:079-08) , fortran programs give a
strange warning at compile time.
Any program like 

      program main
      print*,'Helo world'
      end

Will compile saying

>g77 main.f
>/usr/lib/gcc-lib/i386-redhat-linux/2.96/libg2c.a(open.o): In function
`f_open':
>open.o(.text+0x4e6): the use of `tempnam' is dangerous, better use
`mkstemp'
>
>Compilation finished at Tue Nov 28 15:31:37

Best regards
Thomas A. Poulsen
Dpt. of Solid Mech.
Tech. Univ. of Denmark