Software :: Creating Mex-files With Gcc With External Libraries - Matlab
Mar 2, 2011
I have been browsing trough forums, manuals and people for a few days now wihout success so I thought i give this a go, any help will be very appricieted!
I'm using Matlab 2010a in Ubuntu 10.10. I also have a AVT Marlin F033C firewire camera and want to use the two together. Since most things i will do with the images will be processed in matlab I decided that the best would be if i could do everything in matlab.
The code for capturing a picture is however in c and uses the library dc1394 (usr/lib). Compiling this with gcc works good:
$ gcc grab_gray_image.c -ldc1394
To be able to create a mex-file of it (that matlab can run) I have included "mex.h" in the headers and added the function mexFunction in the very top, this function should do more once it works...:
Choosing "Template Options file for building gcc MEX-files".
When trying to compile i get a few errors but these are easily removed by taking away all the //-comments and all the inline for a few functions (this should do anything for the functionality right?).
After that I am still stuck with this error:
I should probably also note that I needed to rollback to gcc 4.1 since that is the latest one matlab 2010a can handle and now don't get that warning anymore.
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Jan 18, 2011
I installed MATLAB R2009a in my laptop (Fedora 14 x86-64), the installation was succesful but when I run MATLAB (in a console), appears a message: error while loading shared libraries: libut.so: cannot enable executable stack as shared object requires: Permission denied
I find a "solution", execute in a terminal: execstack -c libut.so
I used several times with differents libraries that I needed, but I run MATLAB in a terminal, MATLAB starts in a terminal, only a prompt ">>" and nothing.
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Apr 4, 2010
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2. Some tutorials use "g++ -shared" while others use "ld" for the creation of the shared library. Why? Does it matter which method I use? Is there a difference? Why does nobody mention both options?
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Mar 17, 2011
I tried to mex two C files under matlab but faild. The system warned stdc++ cannot be found. I need the mexa64 files urgently. if someone can mex the C files using his/her machine. My server runs Debian GNU/Linux and the Matlab version is 64-bit R2010b. So the extension for the generated file would be mexa64. I'm using hotmail with the same user name as in here.
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Feb 22, 2010
I am trying to run matlab 7.7 (R2008b) on my ubuntu 9.10 distribution..the thing is that I am totally new with both matlab and linux and I get the following error message from matlab when I try to run an example mex-function:
>> mex yprime.c
/home/margareta/Desktop/matlab/bin/mex: 1572: gcc: Permission denied
Warning: You are using gcc version "". The earliest gcc version supported with mex is "4.0.0". The latest version tested for use with mex is "4.2.0". To download a different version of gcc, visit [URL] eval: 1: gcc: Permission denied mex: compile of ' "yprime.c"' failed. Error using ==> mex at 213 Unable to complete successfully.
I had gcc-4.4 as default on my pc, so after this error I downloaded an older version (gcc-4.1) and removed with rm the symbolic link in /usr/bin pointing to gcc-4.4 and created a new one pointing to gcc-4.1. Now when I type gcc -v in the terminal it says that gcc is in the packages gcc and pentium-builder, to do an apt-get install. I tried that but than it says that gcc-4.1 is already the newest version. It seems that I have multiple versions of gcc installed but neither the terminal nor matlab can find them.
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I downloaded a tarball which contained the necessary library and header files including conio.h. Once extracted, i specified the location and included in the program as " #include "path to the header file" ".
I still didn't call the "clrscr()" function, and it compiled successfully. Next i edited the program to call that function and it gave the following error...
How i can add new libraries in the future?
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Jun 9, 2010
Not I recently installed a package (Vision Egg) that requires the Open GL libraries and headers, specifically, gl.lib and gl.h. I used Synaptic to install nvidia-current and nvidia-current-dev and it now looks as if the required libraries (under different names) are installed in /usr/lib/nvidia-current and as if the required headers are in /usr/include/nvidia-current. I am a bit confused because I also have /usr/lib/nvidia and /usr/lib/nvidia-173.
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Apr 5, 2011
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Code:
#include <test1.h> ...
to
Code:
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libc.so.6 => /lib/i686/cmov/libc.so.6 (0xb7e01000)
/lib/ld-linux.so.2 (0xb7f71000)
Lets focus on libc6 :
[Code]....
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