Re: [Help-gsl] Problems with compiling Non Linear Fit Example

[Patrick Alken]

Hello,

  I just installed a clean version of GSL v2.4 in my home directory to 
try your program. Here are the commands I used:

> cd gsl-2.4
> ./configure --prefix=/home/palken/usr
> make
> make install
> gcc -g -Wall -o test test.c -lm /home/palken/usr/lib/libgsl.a -lgslcblas
> ./test
...
summary from method 'trust-region/levenberg-marquardt'
number of iterations: 16
function evaluations: 23
Jacobian evaluations: 17
reason for stopping: small step size
initial |f(x)| = 62.202928
final   |f(x)| = 5.454180
chisq/dof = 0.804002
A      = 5.17379 +/- 0.27938
lambda = 0.11104 +/- 0.00817
b      = 1.05283 +/- 0.05365
status = success

Note that when compiling test.c, I gave the full path to the new GSL 
v2.4 library (your issue is probably that the linker is trying to link 
with an old version of GSL). Hope this helps.

Patrick

On 02/16/2018 01:45 AM, Dr. Jonny Birkhan wrote:
> Dear all,
>
> I have installed gsl-2.4 on a
>
> Linux 4.4.0-103-generic #126-Ubuntu SMP Mon Dec 4 16:23:28 UTC 2017 
> x86_64.
>
> The libraries are installed in /usr/local/lib.
>
> My gcc version is: gcc (Ubuntu 5.4.0-6ubuntu1~16.04.6) 5.4.0 20160609
>
>
> When I try to compile the Exponential Fitting Example I get the 
> following messages:
>
> gcc -LLIBDIR=/usr/local/lib -o test test.c -lm -lgsl -lgslcblas
>
> /tmp/ccuzgEIN.o:: In function `callback':
> test.c:(.text+0x2b1): undefined reference to 
> `gsl_multifit_nlinear_residual'
> test.c:(.text+0x2c1): undefined reference to 
> `gsl_multifit_nlinear_position'
> test.c:(.text+0x2d8): undefined reference to `gsl_multifit_nlinear_rcond'
> /tmp/cclIWgcr.o: In function `main':
> test.c:(.text+0x386): undefined reference to `gsl_multifit_nlinear_trust'
> test.c:(.text+0x399): undefined reference to 
> `gsl_multifit_nlinear_default_parameters'
> test.c:(.text+0x640): undefined reference to `gsl_multifit_nlinear_alloc'
> test.c:(.text+0x665): undefined reference to `gsl_multifit_nlinear_winit'
> test.c:(.text+0x671): undefined reference to 
> `gsl_multifit_nlinear_residual'
> test.c:(.text+0x6f6): undefined reference to 
> `gsl_multifit_nlinear_driver'
> test.c:(.text+0x708): undefined reference to `gsl_multifit_nlinear_jac'
> test.c:(.text+0x729): undefined reference to `gsl_multifit_nlinear_covar'
> test.c:(.text+0x755): undefined reference to 
> `gsl_multifit_nlinear_trs_name'
> test.c:(.text+0x764): undefined reference to `gsl_multifit_nlinear_name'
> test.c:(.text+0x78f): undefined reference to `gsl_multifit_nlinear_niter'
> test.c:(.text+0xa9e): undefined reference to `gsl_multifit_nlinear_free'
> collect2: error: ld returned 1 exit status
>
> I guess it's a problem with a missing library file. I couldn't find 
> any bug report on that problem.
>
> The source code is appended.
>
> Can you help me?
>
> Thanks in advance and best regards,
>
> Jonny Birkhan