| Problems with CALL_EXTERNAL on AIX [message #600] |
Fri, 11 September 1992 21:28 |
rivers
Messages: 228
Registered: March 1991
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Senior Member |
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I am trying to use the call external routine on an IBM R/6000 machine runninng
AIX 3.2 and IDL 2.3.2. I have succeeded in linking the following file as a
shareable object library.
main()
{
}
test1(argc, argv)
int argc;
void *argv[];
{
return(101);
}
test2(argc, argv)
int argc;
void *argv[];
{
return(102);
}
I compile this with:
cc -c -bloadmap:test.map test.c -o test.o
and link it with
ld -o shrtest.o test.o -bE:shrtest.exp -bM:SRE -T512 -H512 -lc
where shrtest.exp contains:
#!
test1
test2
If I link this shareable object library to a main C program it works fine,
test1 returns 101 and test2 returns 102.
However, when I try to call this from IDL I get the following:
; IDL Version 2.3.2 (AIX ibmr2)
; Journal File for rivers@xray1
; Working directory: /user/rivers
; Date: Sat Sep 12 00:05:48 1992
a = call_external('shrtest.o', '_test1')
print, a
; 101
a = call_external('shrtest.o', '_test2')
print, a
; 101
a = call_external('shrtest.o', 'zzzjunk')
print, a
; 101
It thus seems that IDL always calls the first function in the shareable object
library no matter what the second argument to call_external is. The last call
above should have given an IDL error.
Any idea what the problem is?
Mark Rivers
--
Mark Rivers (516) 282-7708 or 5626
Building 815 rivers@bnlx26.nsls.bnl.gov (Internet)
Brookhaven National Laboratory rivers@bnl (Bitnet)
Upton, NY 11973 BNLX26::RIVERS (Physnet)
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