Re: [Help-gsl] Undefined reference to gsl_deriv_forward

[Vale Cofer-Shabica]

Glad to hear it,
-vale

--
vale cofer-shabica
401.267.8253

On Tue, May 24, 2016 at 1:07 PM, Simon Bart <address@hidden>
wrote:

> Thanks. I made a simple function to do the derivative based on the
> Newtonian method (f'(x) = (f(x+h)-f(x))/h and it works. I did end up using
> gsl_function.
> On May 24, 2016 1:04 PM, "Vale Cofer-Shabica" <address@hidden>
> wrote:
>
>> Simon,
>>
>> I suspect that Cloud9 doesn't know which include/link flags to use. See
>> this section [1] of the reference manual for details, but you can try:
>>
>> % gcc -Wall -I/usr/include -c example.c
>> % gcc -L/usr/lib example.o -lgsl -lgslcblas -lm
>>
>> Which will compile your code in example.c to an executable called a.out.
>> Note, I used the installation prefix /usr, which you indicated in a
>> previous message.
>>
>> Hope that helps,
>> vale
>>
>> [1]
>> https://www.gnu.org/software/gsl/manual/gsl-ref.html#Compiling-and-Linking
>>
>> --
>> vale cofer-shabica
>> 401.267.8253
>>
>> On Tue, May 24, 2016 at 12:39 PM, Simon Bart <address@hidden>
>> wrote:
>>
>>> Cloud9 has a built-in tab for compiling and running code which I use for
>>> convenience, but I've also been trying with g++ without success
>>> On May 24, 2016 12:36 PM, "Vale Cofer-Shabica" <
>>> address@hidden> wrote:
>>>
>>>> Hi Simon,
>>>> While that should fine, you could also use Ubuntu's GSL package,
>>>> libgsl-dev.  How are you compiling and executing your program? And when
>>>> does the error appear?
>>>>
>>>> -vale
>>>>
>>>> --
>>>> vale cofer-shabica
>>>> 401.267.8253
>>>>
>>>> On Tue, May 24, 2016 at 12:12 PM, Simon Bart <address@hidden>
>>>> wrote:
>>>>
>>>>> I'm using Cloud9 which is fully implemented Ubuntu except cloud hosted
>>>>> and I installed GSL in my /usr/include library using the ./configure, make
>>>>> and make install commands
>>>>> On May 24, 2016 11:47 AM, "Vale Cofer-Shabica" <
>>>>> address@hidden> wrote:
>>>>>
>>>>>> Hi Simon,
>>>>>>
>>>>>> Could you give us some more info about you set-up (OS & how you
>>>>>> installed GSL) and how you're compiling your program? I suspect that you
>>>>>> may be missing a flag to link the GSL libraries, -lgsl.
>>>>>>
>>>>>> -vale
>>>>>>
>>>>>> --
>>>>>> vale cofer-shabica
>>>>>> 401.267.8253
>>>>>>
>>>>>> On Tue, May 24, 2016 at 8:33 AM, Simon Bart <address@hidden
>>>>>> > wrote:
>>>>>>
>>>>>>> I've posted my issue in the subject box. I'm new to GSL. It was the
>>>>>>> best
>>>>>>> library I could find with the most math and science operations. I am
>>>>>>> using
>>>>>>> C++, but I've even tried with C and the same error occurs. Hope
>>>>>>> there's
>>>>>>> some help here.
>>>>>>>
>>>>>>> Cheers,
>>>>>>> Simon
>>>>>>>
>>>>>>
>>>>>>
>>>>
>>