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Linker warning L16

Hello,
While building a project this message appears:

*** WARNING L16: UNCALLED SEGMENT, IGNORED FOR OVERLAY PROCESS
    SEGMENT: ?CO?AMPL_DRIVER

I know that this warning indicates that there is a part of code
in the ampl_driver file that is excluded from the overlay process.

after searching (by commenting code parts) I found out that the warning is caused from a
constant 'ref_int_tmpr', which is declared at the 'ampl_driver' file and
is used only once in the same file and nowhere else in the project.
The constant is used by a function which is included only if defined earlier:


// global declaration:
const float code ref_int_tmpr = 40;

...

#ifdef __LT
  out_sig[i] = (out_sig[i] / get_RAM_gain_factor(ampl_param.working_gain)) -
               low_temperature_correction(case_temperature,t_index,i);
#else
  if(!sensor_mode.delta)
  {
        //signal with temperature correction
        out_sig[i] = (out_sig[i] / get_RAM_gain_factor(ampl_param.working_gain)) *
                     ((1 + ref_int_tmpr * ID1_xram.alpha[i]) /
                     (1 + get_temp_sensor() * ID1_xram.alpha[i]));
  }//if(!sensor_mode.delta
  else
  {
        //no temperature correction
        out_sig[i] = out_sig[i] / get_RAM_gain_factor(ampl_param.working_gain);
  }
#endif //__LT

When the _LT option is defined (the #else part isn't executed) the error appears.
The problem is that the warning stays also after commenting/ entering into
the define choice the declaration part:

#ifndef __LT
    const float code ref_int_tmpr = 40
#endif

Any idea why?
Thanks,
Amitai

Parents

0 Amitai Weil over 10 years ago in reply to Reinhard Keil

If I understood correctly what to check, these are the results:

- in the ampl_driver.i file:


#line 29 "ampl_driver.c" /0

 const float code low_photo_signal = 0.0;

 float xdata tempPar;

searching the file for other relevant 'code' and 'ref_int_tmpr'
didn't result in anything.

- in the ampl_driver.lst file:

declaration part:

 25
 26          #ifndef __LT
                          const float code ref_int_tmpr = 40;
              #endif
 29
 30          const float code low_photo_signal = 0.0;
 31
 32          float xdata tempPar;            // fot test perpuose

...
...

afterwards:

175   2                      #ifdef __LT             // 14.10.15 - Amitai
176   2                              // photo signal calculation with
177   2                              // temperature correction for low temperature camera
178   2                              out_sig[i] = (out_sig[i] /   get_RAM_gain_factor(ampl_param.working_gain)) -
179   2                                       low_temperature_correction(case_temperature,t_index,i);
180   2                      #else
                                      if(!sensor_mode.delta)
                                      {
                                              //signal with temperature correction
                                              out_sig[i] = (out_sig[i] / get_RAM_gain_factor(ampl_param.working_gain)) *
                                                                       ((1 + ref_int_tmpr * ID1_xram.alpha[i]) /
                                                                        (1 + get_temp_sensor() * ID1_xram.alpha[i]));
                                      }//if(!sensor_mode.delta
                                      else
                                      {
C51 COMPILER V9.54   AMPL_DRIVER                                                           10/20/2015 12:06:29 PAGE 31

                                              //no temperature correction
                                              out_sig[i] = out_sig[i] / get_RAM_gain_factor(ampl_param.working_gain);
                                      }
                              #endif //__LT
 194   2              }//for(i=0; i<COMMON_NUM; i++)
 195   1              return OK_SerialOut;
 196   1      }

no 'ref_int_tmpr' in symbols section of file.

So it seems that the compiler ignores the content which is not defined currently,
but why is an error appearing? on the other hand changing the definition so that __LT isn't defined results with no
errors.

Thanks,
Amitai

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