Hi,

I'm having some trouble linking the Informix C++ libraries to my own C++
code.

My code includes the <it.h> header file and compiles ok, but whenever I try
using one of the library classes/objects, I get an 'undefined reference to'
error when linking. First I thought I wrongly linked the libraries to my .o
file, but even the examples (demo/c++) don't link correcly as they give the
exact same errors ('make curstst' for example). Is there any way of checking
if the installed libraries are working?
I installed SDK 2.81 and try compiling with g++ version 3.3.1.
Thanks for any help,

Martin

Martin wrote:
> I'm having some trouble linking the Informix C++ libraries to my own C++
> code.
>
> My code includes the <it.h> header file and compiles ok, but whenever I try
> using one of the library classes/objects, I get an 'undefined reference to'
> error when linking. First I thought I wrongly linked the libraries to my .o
> file, but even the examples (demo/c++) don't link correcly as they give the
> exact same errors ('make curstst' for example). Is there any way of checking
> if the installed libraries are working?
> I installed SDK 2.81 and try compiling with g++ version 3.3.1.


Which platform? Which compiler was used to build the library? If it
wasn't a 3.3.x GCC (G++) compiler, you're out of luck. C compilers
mix'n'match; C++ compilers do not, in general.


--
Jonathan Leffler #include <disclaimer.h>
Email: jleffler@earthlink.net, jleffler@us.ibm.com
Guardian of DBD::Informix v2003.04 -- http://dbi.perl.org/

"Jonathan Leffler" <jleffler@earthlink.net> schreef in bericht
news:7Z0kc.13823$eZ5.12660@newsread1.news.pas.eart hlink.net...
> Martin wrote:
> > I'm having some trouble linking the Informix C++ libraries to my own C++
> > code.
> >
> > My code includes the <it.h> header file and compiles ok, but whenever I
try
> > using one of the library classes/objects, I get an 'undefined reference
to'
> > error when linking. First I thought I wrongly linked the libraries to my
..o
> > file, but even the examples (demo/c++) don't link correcly as they give
the
> > exact same errors ('make curstst' for example). Is there any way of
checking
> > if the installed libraries are working?
> > I installed SDK 2.81 and try compiling with g++ version 3.3.1.
>
>
> Which platform? Which compiler was used to build the library? If it
> wasn't a 3.3.x GCC (G++) compiler, you're out of luck. C compilers
> mix'n'match; C++ compilers do not, in general.
>
>

I'm using SuSe Linux.
Well, IBM only offers precompiled C++ libraries as far as I know. When I
download & install the Informix Client SDK, it installs a bunch of libraries
in /opt/informix/lib/c++ which already have been compiled. Can't find any
sources anywhere, so compiling the libraries myself is not on option.
Why would IBM distribute C++ Informix libraries anyway, if 90% of the world
is not able to use them because of the problem you describe? Or am I missing
something here?

Martin

"Martin" <imxng@bootweb.nl> writes:
> I'm using SuSe Linux.
> Well, IBM only offers precompiled C++ libraries as far as I know. When I
> download & install the Informix Client SDK, it installs a bunch of libraries
> in /opt/informix/lib/c++ which already have been compiled. Can't find any
> sources anywhere, so compiling the libraries myself is not on option.
> Why would IBM distribute C++ Informix libraries anyway, if 90% of the world
> is not able to use them because of the problem you describe? Or am I missing
> something here?

IMO, IBM expects you to use the OS that a particular release was
ported and certified on... even for Linux. At least that's the way
IBM behaved towards me when I had a support contract, a newer Red Hat
distro, and a serious bug that halted development. The support dude
claimed that IBM was seriously considering only supporting "Enterprise"
Linux in the future. Well, I've had RHEL3 for six months now and I'm
*still* waiting for a version of J/Foundation that will run on it...

Now that i've had my rant, have a look at Libcpp_machine_notes_2.81.txt
in the doc directory. It would appear that 2.81.UC3 was built on RHL
7.1 (a version that Red Hat "end-of-life"d some time ago). This means
that the C++ libraries were built with egcs-2.95. That's the C++
compiler you should probably be using.

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