undefined symbol: wurfl_ismobile

I am a beginner to C, and am doing a tutorial from the site:
Mobile device detection with WURFL and Varnish - Enrise

I have a very simple setup at the moment, my vcl file consists of:

Code:

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// Intialization
C{
  #include "/home/retrobadger/working_files/tutorials/varnish_terawurfl_c/wurfl.h";
  int is_mobile;
}C


sub detectmobile {
  C{
    char *ua = "bam";
    is_mobile = wurfl_ismobile();
    //is_mobile = 1;
    VRT_SetHdr(sp, HDR_BEREQ, "\011X-Varnish-TeraWurfl:", (is_mobile == 1)?"yes":"no", vrt_magic_string_end);
  }C
}

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But, when I go to restart varnish, I get an error such as:

Code:

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undefined symbol: wurfl_ismobile

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Now, my function wurfl_ismobile is in a *.h and a *.c file as shown in the docs, although the *.c file is much simpler. Does anyone have a suggestion as to how I might start debugging this error message? I do not get an error message when I set the variable to 1, so I assume it's to do with the way I am requesting the function, or *.h file.

Thanks for any advice you can give,
Dan

Quote:

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Originally Posted by retrodans

Now, my function wurfl_ismobile is in a *.h and a *.c file as shown in the docs, although the *.c file is much simpler. Does anyone have a suggestion as to how I might start debugging this error message? I do not get an error message when I set the variable to 1, so I assume it's to do with the way I am requesting the function, or *.h file.

Thanks for any advice you can give,
Dan

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Is the "*.c" file containing wurfl_mobile() being included at compilation?

Yep, these are the 2 scripts I was told to use to compile:

Code:

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gcc -c -o wurfl.o wurfl.c -I/usr/include/libxml2
gcc -shared -Wl,-soname,libwurfl.so.1 -o libwurfl.so.1.0.1 wurfl.o -lxml2

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So after each change to my *.c or *.h file I run both those commands, although I suppose I only need to run them when the *.c file is changed. All my *.c file containes is:

Code:

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#include <string.h>
#include <libxml/parser.h>
#include <libxml/tree.h>
#include <libxml/xpath.h>
#include <libxml/xpathInternals.h>
#include "wurfl.h"

int wurfl_ismobile() {
  return 1;
}

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Quote:

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Originally Posted by retrodans

Yep, these are the 2 scripts I was told to use to compile:

Code:

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int wurfl_ismobile() {
  return 1;
}

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Your function MOST likely needs to match what it expects to see. This is a guess what DOES your header contain?

Try

Code:

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int wurfl_ismobile(char *useragent){
  return 1;
}

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Tim S.