Undefined symbols for architecture x86_64

[march.1.xue@…]

I am not if this is related the gcc48 ,but when I tried to compile fortran and C program, I got error:

Undefined symbols for architecture x86_64:
  "_fjul_dutcoftai_", referenced from:
      ___mod_time_MOD_write_datetime in mod_time.o
  "_fjul_mjdoftai_", referenced from:
      ___mod_time_MOD_read_datetime in mod_time.o
  "_fjul_taiofdutc_", referenced from:
      ___mod_time_MOD_read_datetime in mod_time.o
  "_fjul_taiofmjd_", referenced from:
      ___mod_time_MOD_write_datetime in mod_time.o
  "_gjul_formatdate_", referenced from:
      _fjul_formatdate_ in libjulian.a(fjulian.o)
  "_gjul_formatpds_", referenced from:
      _fjul_formatpds_ in libjulian.a(fjulian.o)
  "_gjul_formatsql_", referenced from:
      _fjul_formatsql_ in libjulian.a(fjulian.o)
  "_gjul_formattime_", referenced from:
      _fjul_formattime_ in libjulian.a(fjulian.o)
  "_gjul_initleaps_", referenced from:
      _fjul_initleaps_ in libjulian.a(fjulian.o)
  "_gjul_parsedate_", referenced from:
      _fjul_parsedate_ in libjulian.a(fjulian.o)
  "_gjul_parsedt_", referenced from:
      _fjul_parsedt_ in libjulian.a(fjulian.o)
  "_gjul_parsetime_", referenced from:
      _fjul_parsetime_ in libjulian.a(fjulian.o)
ld: symbol(s) not found for architecture x86_64
collect2: error: ld returned 1 exit status
make: *** [fvcom] Error 1

any thoughts?

[cooljeanius (Eric Gallager)]

Could you upload the source files for the program you're trying to compile? Are you sure this is a problem specifically with MacPorts's gcc48 port?

[ryandesign (Ryan Carsten Schmidt)]

I'm going to assume this is not a MacPorts issue, since your problem is not with building a MacPorts port. Ask in a GCC support forum if you need help using GCC.