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CALL_EXTERNAL/shared libraries on HP
| CALL_EXTERNAL/shared libraries on HP [message #1198] |
Thu, 01 July 1993 11:56  |
keith
Messages: 7
Registered: July 1993
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Junior Member |
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Seeking advice for linking a shared library on the HP...
I've written C code that I'm using with CALL_EXTERNAL in IDL. I'm
trying to port the code to the HP (a 9000/720 with HPUX 8.07) and am
having link errors from trying to create a shared library. I'm pretty
closely following the notes from RSI for external C code on the HP.
Here's what I'm doing:
(1) I create an object file with position independent code (PIC):
cc -v +z -c pic1.c -I../include
This file contains references to other C functions I have
written and also contains global variables.
(2) I link this with other libraries:
ld -v -o pic1.sl -b pic1.o -L../lib -lmylib1 -lmylib2
Normally I create only archive versions of the other libraries (e.g.
libmylib1.a). In this case I get the following link error:
ld: Unsatisfied symbols:
$global$ (data)
_end (data)
ld: DP-Relative Code in file libmylib1.a(func1.o) - Shared
Library must be Position-Independent
As a test, I tried recompiling all the functions in my archive
libraries as PIC and linked them into shared libraries (e.g.
libmylib1.sl). When I do this I still get a link error on step (2):
ld: Unsatisfied symbols:
$global$ (data)
Have any IDL users on the HP tried doing this? What am I doing wrong
here? This same code links fine on IBM AIX and Sunos (with different
system-dependent linker options, of course). Any suggestions would be
welcome (I don't normally develop software on the HP). Thanks.
------------------------------------------------------------ --------------
Keith Searight, Research Programmer keith@vista.atmos.uiuc.edu
Univ. of Illinois, Atmospheric Sciences Ph. (217) 333-8132
105 S. Gregory Ave., Urbana, IL 61801 Fax (217) 244-4393
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