[CIG-SEISMO] SW4 installation error

[weiyu chen]

Hi,

I am pretty new to Linux, so was following the SW4 installation step-
by-step. I encountered following error messages when "make"

xerror.o: In function `xersav_.constprop.2':
xerror.f:(.text+0x12c): undefined reference to `_gfortran_st_write'
xerror.f:(.text+0x140): undefined reference to
`_gfortran_transfer_character_write'
xerror.f:(.text+0x14a): undefined reference to
`_gfortran_st_write_done'
.....

Can you please teach me how to install SW4 properly? Many thanks.

weiyu