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From: alad@elaine1.stanford.edu (Aladdin Nassar)
Newsgroups: comp.lang.fortran
Subject: Fortran library system calls for UNIX
Message-ID: <1990Dec16.205427.24851@portia.Stanford.EDU>
Date: 16 Dec 90 20:54:27 GMT
Sender: alad@portia.stanford.edu
Followup-To: alad@portia.stanford.edu
Organization: Stanford University - AIR
Lines: 39


I am trying to use the fortran library function 'system' to execute a UNIX
command from within a fortan program on the SUN SPARC workstations. (check
man 3f system). The test program is as follows :

c--------------test.f----------------------------
	program test
	integer system
	i=system('/bin/ls')
	stop
	end
c------------------------------------------------


I compile and link as follows :

f77 -o test test.f -lU77

and I get the error message :

ld: Undefined symbol 
   _units 


I tried the same code and procedure on a DEC 5400 and it worked fine with
no error message.

What could be the problem ? Could _units be defined in other archives 
libraries ? Would using the 'nm' command help solve this problem ?

Please respond by e-mail to alad@portia.stanford.edu (I don't follow USENET
constantly) and I will summarize if there are any responses.

Thanks,

Aladdin Nassar
Gradute Student
Civil Engineering,
Stanford Univeristy