lm_sensors with XFCE

posix_memalign · 06-24-2010, 07:42 PM

I have lm_sensors installed and working, I can type "sensors" from the console and I will get a nice list of the CPU temperatures as I want them.

However I would also like to have the xfce4-sensors-plugin working so that I can have a more convenient manner of observing the temperature.

I get the following errors upon compilation:

Code:

../lib/.libs/libxfce4sensors.so: undefined reference to `sensors_get_feature'
../lib/.libs/libxfce4sensors.so: undefined reference to `sensors_get_all_features'
../lib/.libs/libxfce4sensors.so: undefined reference to `sensors_get_ignored'
collect2: ld returned 1 exit status
make[2]: *** [xfce4-sensors-plugin] Error 1
make[2]: Leaving directory `/tmp/SBo/xfce4-sensors-plugin-0.10.99.6/panel-plugin'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/tmp/SBo/xfce4-sensors-plugin-0.10.99.6'
make: *** [all] Error 2

This is the output from the Slackware package from slackbuilds.org for version 0.1.

I have also tried version 0.9 and 1.0 (compile directly from source, no package) -- to no avail.

I tried looking at the source to identify where these functions missing are, I couldn't find them in the source, which makes me believe this is a library that I'm missing. However, which library? When I search on e.g. Freshmeat.net I only find one applicable entry for "sensors", and on Slackbuilds.org I only find the 0.1 version of this plugin -- not even anything lm_sensors related at all besides that one.

My system is a plain x86 with Slackware 13.1.

Any thoughts?

MS3FGX · 06-24-2010, 08:05 PM

The error message should tell you farther up what file is actually missing. The part you posted is where it finally fails completely, but at some earlier point it would give you a warning message about some file not being found.

posix_memalign · 06-25-2010, 02:00 PM

Quote:

Originally Posted by MS3FGX

The error message should tell you farther up what file is actually missing. The part you posted is where it finally fails completely, but at some earlier point it would give you a warning message about some file not being found.

I believe you are mistaken,
if the source code included some other source file, or header file, then there would be a compiler error about a missing file.

However if I simply try to dereference some symbol as such:

Code:

#include <stdio.h>

int main(int argc, char **argv)
{
    sensors_get_feature(NULL);

    return 0;
}

This will then fail upon compilation with no missing file, simply undefined references as such:

Code:

/tmp/cca2ioDc.o: In function `main':
test.c:(.text+0x17): undefined reference to `sensors_get_feature'
collect2: ld returned 1 exit status

If you forget to link against a library, e.g. if you are using some libm functions and forget to link against the math library you also get a similar fault, it is a common compiler error and there will not be any reference to missing files.