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Building sharable object libraries for CALL_EXTERNAL [message #14591]

Fri, 12 March 1999 00:00

Octavi Fors
Messages: 13
Registered: March 1999

Junior Member

<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
Hello,
This is my first trial calling a C-routine from IDL with CALL_EXTERNAL,
and I have some problems with building routine.so file. It's just
a test, so the routine it's very simple:
#include <math.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <fcntl.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <string.h>
float** routine(argc,argv)
 int argc;
 void *argv[];
 {
 int n, x, y;
 float *input;
 float **output;
 int i,j;
 input = (float *) argv[0];
  n=*(int *) argv[1];
  x=*(int *) argv[2];
  y=*(int *) argv[3];
 output=(float **)malloc(4*n);
  for(i=0;i<n;i++) output[i]=(float*)malloc(4*x*y);
for(j=0;j<n;++j)
 for(i=0;i<x*y;++i)
 output[j][i]=input[i];
return(output);
 }
First, I try to create routine.o with:
 $ cc -pic -fsingle -c routine.c
 no problem.
Second, when I try to create routine.so with:
 $ ld -o routine.so -z text routine.o (changing '-assert
pure-text' to '-z text' because it's a SunOS Version 5.5.1)
 Undefined     & amp;nbsp;     & amp;nbsp;     & amp;nbsp;    
first referenced
  symbol    & ;nbsp;     & ;nbsp;     & ;nbsp;     & ;nbsp;     
in file
 malloc     & ;nbsp;     & ;nbsp;     & ;nbsp;     & ;nbsp;     
routine.o  (symbol belongs to implicit dependency /usr/lib/libc.so.1)
 .mul     &n bsp;     &n bsp;     &n bsp;     &n bsp;     &n bsp; 
routine.o  (symbol belongs to implicit dependency /usr/lib/libc.so.1)
 mcount     & ;nbsp;     & ;nbsp;     & ;nbsp;     & ;nbsp;     
routine.o
 ld: fatal: Symbol referencing errors. No output written
to routine.so
It seems to need /usr/lib/libc.so.1. So I add it in the command line:
 $ ld -o routine.so -z text routine.o /usr/lib/libc.so.1
 Undefined     & amp;nbsp;     & amp;nbsp;     & amp;nbsp;    
first referenced
  symbol    & ;nbsp;     & ;nbsp;     & ;nbsp;     & ;nbsp;     
in file
 mcount     & ;nbsp;     & ;nbsp;     & ;nbsp;     & ;nbsp;     
routine.o
 ld: fatal: Symbol referencing errors. No output written
to routine.so
Malloc error is gone, but mcount (?) remains. Does anybody know what's
wrong with it?
Thans in advance,
Octavi.
<pre>-- 
============================================================ =====

Octavi Fors Aldrich

Astronomy Department</pre>

<pre>Physics Faculty</pre>

<pre>Avgda. Diagonal 647
08028 Barcelona
SPAIN

Telf: 34-934021122
Fax:  34-934021133
e-mail: octavi@fajnm1.am.ub.es

============================================================ ===== </pre>
 </html>

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[Message index]

		Building sharable object libraries for CALL_EXTERNAL By: Octavi Fors on Fri, 12 March 1999 00:00
		Re: Building sharable object libraries for CALL_EXTERNAL By: rmlongfield on Wed, 17 March 1999 00:00
		Re: Building sharable object libraries for CALL_EXTERNAL By: korpela on Mon, 15 March 1999 00:00
		Re: Building sharable object libraries for CALL_EXTERNAL By: Octavi Fors on Sat, 13 March 1999 00:00
		Re: Building sharable object libraries for CALL_EXTERNAL By: David Foster on Mon, 22 March 1999 00:00
		Re: Building sharable object libraries for CALL_EXTERNAL By: Dr. G. Scott Lett on Mon, 22 March 1999 00:00
		Re: Building sharable object libraries for CALL_EXTERNAL By: Octavi Fors on Thu, 18 March 1999 00:00

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