pxfgetenv missing

[Jennifer Brauch <jbrauch at senckenberg dot de>]

Hello,

I run a fortran modell which needs an etxra module. So I compiled both 
with the same compiler (gcc_4.4.5 and gcc_4.6.1).
When I link the two together, I get this error:
	
> make
linking parallel program
libgrib1.a(copen.o): In function `copen_':
copen.c:(.text+0x18a): warning: the use of `tempnam' is dangerous, 
better use `mkstemp'
libgrib1.a(getEnvironment.o): In function `getenvironment_':
getEnvironment.F:(.text+0xc4): undefined reference to `pxfgetenv_'
collect2: ld returned 1 exit status
make: *** [parexe] Error 1
> module list
Currently Loaded Modulefiles:
  1) slurm/2.3.0-2             2) mpi/mvapich2/gcc/64/1.7   3) 
hdf5/gcc_4.4.5/1.8.7      4) netcdf/gcc_4.4.5/4.1.3


Now I'm lost. pxfgetenv should be part of gcc as far as I understood it. 
And it worked for me before (meaning, I compile it on the very same 
computer with the very same compiler before without problems). There is 
a lot of change on the computer I'm working on, but what is missing? 
Where is this library?

Many thanks for your help,

jenny