RHEL 6, FC12, 13, 14 do not ship with static versions of glibc OR the libraries are in a directory that is not normally pathed. Thus, there is no static version of libm to link by default.

64bit compiler and x86_64 64bit OS: RHEL 6.x distros may put the libs in path not normally searched, /usr/lib/x86_64-redhat-linux5E/lib64/ Add this path explicitly:

Possible workarounds are:

1. Specify library location using -L option
   ifort -static hello.f90 -L/usr/lib/x86_64-redhat-linux5E/lib64/
2. Add the location of libraries to LIBRARY_PATH variable