Subject:
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Re: Statically and Dynamically linking lnp ....
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Sat, 26 Aug 2000 14:31:44 GMT
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Viewed:
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981 times
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Regarding the previous posting: Please disregard ...
I figured it out, but thought it may be useful to post
a reply to myself, in case it's ever of use to anyone
else using the same tools:
I forgot to wrap my include in an ' extern "C" ' block.
As I understand it this prevents C++ name mangling from
obscuring calls to pure C comnpiled code ???
Anyway the simple code
extern "C"{
#include "liblnp.h"
}
in my C++ class header file seems to have fixed it for now ;-)
Cheers,
Colin
In lugnet.robotics.rcx.legos, Colin Ryan writes:
> Hi All,
>
> I was wondering if someone could give me a quick guide
> as to the compilation/linking options when using
> liblnp.h etc. I'm having a few difficulties.
>
> I wanted to know how exactly to link in the shared library.
> I tried installing it in the standard /lib and running
> ldconfig (as root) on that dir to recognise it, I also tried
> pointing to the directory containing it using the
> $LD_LIBRARY_PATH env variable, but neither have worked:
>
> I have referenced the liblnp.h in a c++ source file (which
> I'm using to wrap LNP functionality) and then compiled it
> sucessfully, but when I try to link it to my main() class,
> in my make environment, I get:
>
> simpleLNPTransport.o: In function
> `simpleLNPTransport::simpleLNPTransport(void)':
> simpleLNPTransport.o(.text+0x81): undefined reference to `lnp_init(char *,
> unsigned short, unsigned char, unsigned char, int)'
> simpleLNPTransport.o: In function `simpleLNPTransport::sendCORBA(unsigned char
> const *&, unsigned char)':
> simpleLNPTransport.o(.text+0x101): undefined reference to
> `lnp_addressing_write(unsigned char const *, unsigned char, unsigned char,
> unsigned char)'
> simpleLNPTransport.o: In function `simpleLNPTransport::sendControl(unsigned
> char const *&, unsigned char)':
> simpleLNPTransport.o(.text+0x176): undefined reference to
> `lnp_addressing_write(unsigned char const *, unsigned char, unsigned char,
> unsigned char)'
> collect2: ld returned 1 exit status
> make: *** [nanOrbServer] Error 1
>
> simpleLNPTransport is my cpp class file.
>
>
> Thanks in advance,
>
> Colin Ryan
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Message is in Reply To:
 | | Statically and Dynamically linking lnp ....
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| Hi All, I was wondering if someone could give me a quick guide as to the compilation/linking options when using liblnp.h etc. I'm having a few difficulties. I wanted to know how exactly to link in the shared library. I tried installing it in the (...) (24 years ago, 26-Aug-00, to lugnet.robotics.rcx.legos)
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