Re: undefined reference to `UpnpInit'

this is what tells the linker to link the libupnp library

-l is the option. upnp is the 'name' of the library. The 'lib' prefix 
and the .a (or .so) extensions are implied.

-L is the search path for libraries

-I is the search path for headers

For details checkout 'man gcc' or 'man g++'

cheers,
nek


Thang wrote:
> Hi Nek,
> 
> it works. Thx a lot. But is the meaning of "-lupnp"?
> 
> br,
> Thang
> 
> 
> ext Nektarios K. Papadopoulos wrote:
>> Hi Thang,
>>
>> can you try:
>> g++ -I/home/upnp/include/upnp -L/home/upnp/ -lupnp test_init.c
>>
>>
>> cheers,
>> nek
>>
>> Thang wrote:
>>> Hi Kitty,
>>>
>>> I already try your suggestion using command :
>>>
>>> "g++ -I/home/upnp/include/upnp -L/home/upnp/libupnp.a test_init.c"
>>> The message after compiling is still the same:
>>>
>>> "/tmp/ccxrFJde.o: In function `main':
>>> test_init.c:(.text+0xf1): undefined reference to `UpnpInit'
>>> .......
>>> collect2: ld returned 1 exit status"    :-(
>>>
>>> I also check the library libupnp.a if it contains the function UpnpInit.
>>>
>>>
>>> You wrote: "By this, U would know if by chance upnpapi.c which has 
>>> the function
>>> UpnpInit is excluded by any compile time option."
>>>
>>> Where can I find this c-file? In my opinion the UpnpInit is included. 
>>> I have check it in the package "libupnp-1.3.1"
>>>
>>> Do you another ideas????
>>> Maybe the installation wasn't successfully?
>>>
>>> br,
>>> Thang
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
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>>
> 
> 

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Nektarios K. Papadopoulos
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inAccess Networks
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