Re: [Gumstix-users] Newbie on g++ and gpsd

[Curtis O. <cur...@gm...>]

Hi Marcus,

Try -lgps (all run together, without the lib and no trailing slash) instead
of -l libgps/

The Unix convention for specifying libs makes sense once you understand the
logic. :-)

Curt.
On Mar 30, 2012 7:28 AM, "MarcusJ" <n09...@st...> wrote:

> Hi, I feel a bit stupid asking this as it is probably a very simple thing
> and
> I'm not sure this is the right place to ask for it.
>
> However, I'm trying to build a program that talks to the GPS on my
> Gallop43.
> I've installed the related packages availble through opkg and I try to
> write
> a really simple test program to get started.
> I usually don't do much programming in a linux environment so I'm
> inexperienced when it comes to g++ and the build process.
> Here I'm trying to build it natively on the gumstix. I've built a few small
> things on the gumstix already but not something that makes  use of external
> libraries.
>
> In the code i include gps.h and try to use some functions from it.
> I try to compile by the simple command:
> /# g++ testGps.c /
> I get the following output:
> //tmp/ccT3JlyM.o: In function `main':
> testGps.c:(.text+0xc0): undefined reference to `gps_open_r'
> collect2: ld returned 1 exit status/
>
> Here I'm expecting that the library contaning the functions isn't found so
> I
> try to tell g++ where it is.
> I run the following:
> /# g++ testGps.c -L /usr/lib/ -l libgps/
> And get:
>
> //usr/lib/gcc/arm-angstrom-linux-gnueabi/4.3.3/../../../../arm-angstrom-linux-gnueabi/bin/ld:
> cannot find -llibgps
> collect2: ld returned 1 exit status/
>
> This makes me confused as the library seems to be in the right directory:
> /# ls -la  /usr/lib/libgps*
> -rwxr-xr-x 1 root root    948 Sep 15  2010 /usr/lib/libgps.la
> lrwxrwxrwx 1 root root     16 Mar 27 15:12 /usr/lib/libgps.so ->
> libgps.so.19.0.0
> lrwxrwxrwx 1 root root     16 Jan 22 22:09 /usr/lib/libgps.so.19 ->
> libgps.so.19.0.0
> -rwxr-xr-x 1 root root  65972 Sep 15  2010 /usr/lib/libgps.so.19.0.0
> -rwxr-xr-x 1 root root    989 Sep 15  2010 /usr/lib/libgpsd.la
> lrwxrwxrwx 1 root root     16 Mar 27 15:12 /usr/lib/libgpsd.so ->
> libgpsd.so.0.0.0
> lrwxrwxrwx 1 root root     16 Jan 22 22:09 /usr/lib/libgpsd.so.0 ->
> libgpsd.so.0.0.0
> -rwxr-xr-x 1 root root 232840 Sep 15  2010 /usr/lib/libgpsd.so.0.0.0/
>
> What am I doing wrong? Can anyone give me som guidance?
>
> Thanks Marcus
>
> --
> View this message in context:
> http://gumstix.8.n6.nabble.com/Newbie-on-g-and-gpsd-tp4671147p4671147.html
> Sent from the Gumstix mailing list archive at Nabble.com.
>
>
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