Well, somewhere you have to put the nlopt library to link with.
Try to run mex --help or something similar to discover how to give it a
library.
BTW I never used Matlab
Hope it helps
mario
On 02-Dec-11 13:11, Pattabhi Ramaiah wrote:
Hellow,
Can some one tell me in detail how to compile and execute the
nlopt_optimize-mex.c file in matlab, I have been struggling with this.
I am using Linux with Fedora 13.
Matlab produced the bellow errors when I excuted with mex command
>> mex nlopt_optimize-mex.c
nlopt_optimize-mex.o: In function `make_opt':
nlopt_optimize-mex.c:(.text+0x3d3): undefined reference to `nlopt_destroy'
nlopt_optimize-mex.c:(.text+0x3dd): undefined reference to `nlopt_destroy'
nlopt_optimize-mex.c:(.text+0x40e): undefined reference to `nlopt_create'
nlopt_optimize-mex.c:(.text+0x428): undefined reference to `nlopt_destroy'
nlopt_optimize-mex.c:(.text+0x432): undefined reference to `nlopt_destroy'
nlopt_optimize-mex.c:(.text+0x481): undefined reference to
`nlopt_set_lower_bounds'
nlopt_optimize-mex.c:(.text+0x4b4): undefined reference to
`nlopt_set_upper_bounds'
nlopt_optimize-mex.c:(.text+0x4d4): undefined reference to
`nlopt_set_stopval'
nlopt_optimize-mex.c:(.text+0x4ef): undefined reference to
`nlopt_set_ftol_rel'
nlopt_optimize-mex.c:(.text+0x50a): undefined reference to
`nlopt_set_ftol_abs'
nlopt_optimize-mex.c:(.text+0x525): undefined reference to
`nlopt_set_xtol_rel'
nlopt_optimize-mex.c:(.text+0x554): undefined reference to
`nlopt_set_xtol_abs'
nlopt_optimize-mex.c:(.text+0x597): undefined reference to
`nlopt_set_maxeval'
nlopt_optimize-mex.c:(.text+0x5b2): undefined reference to
`nlopt_set_maxtime'
nlopt_optimize-mex.c:(.text+0x5d2): undefined reference to
`nlopt_set_population'
nlopt_optimize-mex.c:(.text+0x5f2): undefined reference to
`nlopt_set_vector_storage'
nlopt_optimize-mex.c:(.text+0x630): undefined reference to
`nlopt_set_initial_step'
nlopt_optimize-mex.c:(.text+0x680): undefined reference to `nlopt_destroy'
nlopt_optimize-mex.c:(.text+0x68a): undefined reference to `nlopt_destroy'
nlopt_optimize-mex.c:(.text+0x6c1): undefined reference to `nlopt_destroy'
nlopt_optimize-mex.c:(.text+0x6cb): undefined reference to `nlopt_destroy'
nlopt_optimize-mex.c:(.text+0x6ea): undefined reference to
`nlopt_set_local_optimizer'
nlopt_optimize-mex.c:(.text+0x6f2): undefined reference to `nlopt_destroy'
nlopt_optimize-mex.o: In function `mexFunction':
nlopt_optimize-mex.c:(.text+0x75c): undefined reference to `nlopt_destroy'
nlopt_optimize-mex.c:(.text+0x799): undefined reference to `nlopt_destroy'
nlopt_optimize-mex.c:(.text+0x829): undefined reference to `nlopt_destroy'
nlopt_optimize-mex.c:(.text+0x8ad): undefined reference to `nlopt_destroy'
nlopt_optimize-mex.o:nlopt_optimize-mex.c:(.text+0x939): more
undefined references to `nlopt_destroy' follow
nlopt_optimize-mex.o: In function `mexFunction':
nlopt_optimize-mex.c:(.text+0xa17): undefined reference to
`nlopt_set_min_objective'
nlopt_optimize-mex.c:(.text+0xa2f): undefined reference to
`nlopt_set_max_objective'
nlopt_optimize-mex.c:(.text+0xa91): undefined reference to `nlopt_destroy'
nlopt_optimize-mex.c:(.text+0xb5e): undefined reference to `nlopt_destroy'
nlopt_optimize-mex.c:(.text+0xba8): undefined reference to `nlopt_destroy'
nlopt_optimize-mex.c:(.text+0xc65): undefined reference to
`nlopt_add_inequality_constraint'
nlopt_optimize-mex.c:(.text+0xc87): undefined reference to `nlopt_destroy'
nlopt_optimize-mex.c:(.text+0xd0b): undefined reference to `nlopt_destroy'
nlopt_optimize-mex.c:(.text+0xdda): undefined reference to `nlopt_destroy'
nlopt_optimize-mex.c:(.text+0xe26): undefined reference to `nlopt_destroy'
nlopt_optimize-mex.c:(.text+0xee3): undefined reference to
`nlopt_add_equality_constraint'
nlopt_optimize-mex.c:(.text+0xf07): undefined reference to `nlopt_destroy'
nlopt_optimize-mex.c:(.text+0xf8c): undefined reference to
`nlopt_optimize'
nlopt_optimize-mex.c:(.text+0xfbc): undefined reference to `nlopt_destroy'
collect2: ld returned 1 exit status
mex: link of ' "nlopt_optimize-mex.mexa64"' failed.
??? Error using ==> mex at 221
Unable to complete successfully.
Any suggestions will be greatful.
Best
Pattabhi
On Thu, Dec 1, 2011 at 11:22 AM, Pattabhi Ramaiah <[email protected]
<mailto:[email protected]>> wrote:
Dear All,
This question may look trivial, but I am facing problem.
I am working with nlopt-2.2.4, linux version and my interest is in
linking nlopt with MATLAB. I think I am able to install correctly
using
./configure MEX=/data/ab/cd/ef/gh/nlopt-2.2.4/octave
make
make install
after this the an executable for dummy.c is generated and it
prints Hellow world. So I assume my compilation of nlopt is correct.
But when I tried to compile nlopt_optimize-mex.c using matlab mex,
like *mex nlopt_optimize-mex.c *in the matlab command window,
matlab printed the following errors
nlopt_optimize-mex.c:31:19: error: nlopt.h: No such file or directory
nlopt_optimize-mex.c:122: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or
‘__attribute__’ before ‘make_opt’
nlopt_optimize-mex.c: In function ‘mexFunction’:
nlopt_optimize-mex.c:181: error: ‘nlopt_result’ undeclared (first
use in this function)
nlopt_optimize-mex.c:181: error: (Each undeclared identifier is
reported only once
nlopt_optimize-mex.c:181: error: for each function it appears in.)
nlopt_optimize-mex.c:181: error: expected ‘;’ before ‘ret’
nlopt_optimize-mex.c:184: error: ‘nlopt_opt’ undeclared (first use
in this function)
nlopt_optimize-mex.c:184: error: expected ‘;’ before ‘opt’
nlopt_optimize-mex.c:186: error: ‘opt’ undeclared (first use in
this function)
nlopt_optimize-mex.c:302: error: ‘ret’ undeclared (first use in
this function)
I could compile all the example mex files in matlab mex folder, so
I assume my matlab mex is working fine.
Also I am not successful in compiling *nlopt_optimize-mex.c *on
the unix terminal.
I also tried to change the configure file to matlab root folder as
given below and reinstall nlopt
./configure MEX=/opt/matlabR2009b/extern/examples/mex
make
make install
but still not successful in compiling the *mex nlopt_optimize-mex.c.*
*
*
Apart from that, I tried to work on the example problem given in
the tutorial
*
*
myfunc.m
function [val, gradient] = myfunc(x)
val = sqrt(x(2));
if (nargout > 1)
gradient = [0, 0.5 / val];
end
myconstraint.m
function [val, gradient] = myconstraint(x,a,b)
val = (a*x(1) + b)^3 - x(2);
if (nargout > 1)
gradient = [3*a*(a*x(1) + b)^2, -1];
end
and test.m
opt.algorithm = NLOPT_LD_MMA
opt.lower_bounds = [-inf, 0]
opt.min_objective = @myfunc
opt.fc = { (@(x) myconstraint(x,2,0)), (@(x) myconstraint(x,-1,1)) }
opt.fc_tol = [1e-8, 1e-8];
opt.xtol_rel = 1e-4
[xopt, fmin, retcode] = nlopt_optimize(opt, [1.234 5.678])
but matlab says: *Attempt to execute SCRIPT nlopt_optimize as a
function:*
*
*
Any thoughts would be appreciated. Thanks in advance.
Best regards
Pattabhi
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Data Analysis and Visualization Group | http://www.cscs.ch/~mvalle
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