Linking 64 bit objects with 32 bit library(.so)

Can we link x86 64 bit objects(*.o and *.a) with x86/32 bit i.e. ELFCLASS32 library (.so)?
I tried to do this but snagged in errors -
cc -fast -xarch=amd64 -o ABC a64_1.o a64_2.o L164.a -l32bitlib
ld: fatal: file lib32bitlib.so: wrong ELF class: ELFCLASS32
Is any workaround available to solve this issue?

You cannot mix 32-bit and 64-bit code in the same program. The entire program, including shared libraries that are linked, must all be 32-bit or all 64-bit. This rule applies on Solaris and Linux, on all platforms.

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64 bit library load issue: Can't load AMD 64-bit .so on a AMD 64-bit platfo

I get the folowing error when calling load/loadLibrary:
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I am hoping someone has a clue about this.
uname -a
Linux GeorgeNSuSe 2.6.8-24.25-default #1 Thu Aug 24 09:57:32 UTC 2006 x86_64 x86_64 x86_64 GNU/Linux
java -version
java version "1.5.0_11"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_11-b03)
Java HotSpot(TM) 64-Bit Server VM (build 1.5.0_11-b03, mixed mode)
Makefile for library:
ieldex.so: BitSet.o
ld -Map libyieldex.map -shared -o libyieldex.so BitSet.o
BitSet.o: BitSet.cpp
gcc -ansi -Wall -fPIC -save-temps -march=k8 -m64 -I/usr/java/jdk1.5.0_11/include/linux -I/usr/java/jdk1.5.0_11/include/ -c -o BitSet.o BitSet.cpp
java command:
/usr/java/jdk1.5.0_11/jre/bin/java -server -d64 -classpath yieldex.jar com.yieldex.BitSet
Thanks!
George

ok. I was able to resolve this.
When I used JDK 5.0 u12 , I ran into this weird cryptic error
Exception in thread "Thread-4" java.lang.UnsatisfiedLinkError: libsetupSDKJNI.so: Can't load AMD 64-bit .so on a AMD 64-bit platform
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Exception in thread "Thread-4" java.lang.UnsatisfiedLinkError: libsetupSDKJNI.so: undefined symbol: __gxx_personality_v0
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16 bit library

I have a 16 bit library, compiled with Borland C/C++, for a data adquisition
card. I want to use it with Labwindows/CVI. Can I use it with Labwindows/CVI
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which version of CVI i have to use?
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Thanks Fernando but the library I want to use is a static library.
"Fernando" escribió en el mensaje
news:[email protected]..
>
> From Labwindows/CVI Programmer Reference Manual: LabWindows/CVI for
windows95
> and NT does not load 16-bit DLLs. If you want to do so, you must obtain
> a 32-to-16-bit thunking DLL and a 32-bit DLL import library.
>
> "Emilio J. Góngora" wrote:
> >I have a 16 bit library, compiled with Borland C/C++, for a data
adquisition>card.
> I want to use it with Labwindows/CVI. Can I use it with
Labwindows/CVI>4.0.1
> wich have a 32 bits compiler? if i had to use a 16 bits compiler,>which
version
> of CVI i have to use?>>Thanks a lot.>>

Linking smart objects with it's layer mask

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You're pre-CS4 right?
1) Upgrade to CS4
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3) ...
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Problem with the math library functions

Hi,
I encountered a problem related to some functions provided by math library on sun. I narrowed it down to the following test program:
========================================================
#include<stdio.h>
#include<math.h>
void pow_res()
double x = 10.0;
double y = 2.5;
printf("pow(%.2e, %.2e):%.20e\n", x, y, pow(10.0, 2.5));
void cos_res()
double x = -6.433230338433114370e-02;
printf("x:%.20e cos(x):%.20e\n", x, cos(x));
int main()
pow_res();
cos_res();
return 0;
========================================================
The above test program has to be linked with any math library. It is �libm� for amd64/linux, but for sparc we have choice between �libm� and �libmopt�. I am compiling above program with "cc <test_program.c> <-lm/-lmopt>" command.
On sparc, if the above test program is getting linked with �-lm" then it gives same results for the �cos� on both amd64 and sparc, but gives different results (16th decimal digit onward) for �pow�. If it is getting linked with �-lmopt� then it gives same result for the �pow� on both the platforms, but gives different results for �cos�. Linux results match with the amd64 results.
The �Numerical Computation Guide� provided by SUN (ftp://docs-pdf.sun.com/802-5692/802-5692.pdf page 40, table 2.10 ) says that you can trust only 15-17 decimal digits for double calculation. But here the requirement is to match the sparc results exactly with the amd64/linux or at least match the result till 20th decimal digit. I guess it is something to do with the FPU setting either through compiler options or code. I tried many different compiler options, like -fast, different combinations of compiler options provided by -fast macro, but nothing helped.
Following is the system configuration:
Amd64:
gcc version: 3.3.6
OS: RedHat Enterprise Linux 3.0 U7 (Linux 2.4.21-40.ELsmp x86_64)
Sparc:
cc version: Sun C 5.8 Patch 121015-01
OS: SunOS 5.9 Generic_118558-21 sun4u sparc SUNW,Sun-Fire-280R
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Many thanks,
Sunil

Transcendental functions are not specified to be correctly rounded in the same
sense as +-*/. So it's entirely possible, and often observed, that libraries of equal
quality deliver slightly different results.
To simplify, suppose one wanted to compute x = 4*atan(1.0)
which happens to be the
transcendental number pi which is roughly, in hex and in decimali:
.C90F DAA2 2168 C234 C... * 2^4 or 3.141592653589793239...
But binary floating-point arithmetic can only represent certain rational numbers of
the form of an integer of at most 53 significant bits times a power of two. The
nearest double-precision number to pi is
.C90F DAA2 2168 C * 2^4 or roughly 3.141592653589793116...
This particular number has a large but finite decimal expansion. And if you
do printf with %e.20 you will get the 20 decimal digits of that double-precision
number's expansion, not the 20 decimal digits of pi, which only agrees to the
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In the case of pow(10.0,2.5), (which happens to be sqrt(1.0e5))
the correct result in hex looks something like
.9E1D 276F D4BA C410 C... * 2^9 or roughly 3.162277660168379332...E+2
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on which approximation algorithm is used, which might depend on what's fastest
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longi wrote:
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Have you ever synced with this computer before? If you did, have you synced with another computer since then?

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Hi,
I have written two libraries, both libraries need to share access to a variable, GblVal. So in one lib, when GblVal is changed, the other lib should also see this change.
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lib1.c:
int GblSum;
void Do(){
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lib1.h:
extern int GblSum;
lib2.c:
#include "lib1.h"
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Linking 64 bit objects with 32 bit library(.so)

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