#include <engine.h>
in [Matlab]
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From: Kevin Ostheimer on 19 Sep 2006 05:54 The source code is very simple but causes a linker error... ********************************************************* #include <stdio.h> #include <stdlib.h> #include <engine.h> int main(void) { Engine *ep; ep=engOpen(NULL); engClose(ep); system("PAUSE"); return; } ********************************************************* - Matlabworkspace set to C-Code Workspace - MATLAB Version 7.1.0.124 (R14) Service Pack 3 !!!But I get a Linker error although everything is successfully included: [Linker error] undefined reference to `engOpen' ********************************************************* EDU>> dir .. interface.dev interface_private.res ... interface.layout main.c MATLAB For C interface_private.h main.o Makefile.win interface_private.rc ********************************************************* Please help a student... thank you!
From: Titus Edelhofer on 19 Sep 2006 07:05 Hi Kevin, the includes are for compilation. For successful linking you need to add the library to the call of the linker. How do you call the compiler/linker? Titus "Kevin Ostheimer" <info(a)impulsleistung.de> schrieb im Newsbeitrag news:ef411d0.-1(a)webcrossing.raydaftYaTP... > The source code is very simple but causes a linker error... > > ********************************************************* > #include <stdio.h> > #include <stdlib.h> > #include <engine.h> > > int main(void) > { > Engine *ep; > ep=engOpen(NULL); > engClose(ep); > system("PAUSE"); > return; > } > ********************************************************* > > - Matlabworkspace set to C-Code Workspace > - MATLAB Version 7.1.0.124 (R14) Service Pack 3 > !!!But I get a Linker error although everything is successfully > included: > [Linker error] undefined reference to `engOpen' > > ********************************************************* > EDU>> dir > > . interface.dev interface_private.res > .. interface.layout main.c > MATLAB For C interface_private.h main.o > Makefile.win interface_private.rc > ********************************************************* > > Please help a student... thank you!
From: Kevin Ostheimer on 19 Sep 2006 07:41 I work with the Dev-C++ Platform under WindowsXP. MingW is the Compiler running in background. I set the path: "C:\Programme\MATLAB_SV71\extern\include" as Reference to all header files. So !ONLY! the files in the upper directory are included. What path?s else do I have to include?
From: Titus Edelhofer on 19 Sep 2006 08:03 Hi Kevin, it's not the compiler complaining about missing include files, it's the linker complaining about missing libraries. Take a look at the help for External Interfaces, Calling MATLAB from C, and then Compiling and Linking. But I guess you will have another problem, because I don't think MingW is a supported compiler...? Titus "Kevin Ostheimer" <info(a)impulsleistung.de> schrieb im Newsbeitrag news:ef411d0.1(a)webcrossing.raydaftYaTP... >I work with the Dev-C++ Platform under WindowsXP. MingW is the > Compiler running in background. > > I set the path: "C:\Programme\MATLAB_SV71\extern\include" as > Reference to all header files. > > So !ONLY! the files in the upper directory are included. > > What path?s else do I have to include?
From: Michael Wild on 20 Sep 2006 02:39
On Tue, 19 Sep 2006 05:54:47 -0400, Kevin Ostheimer wrote: > The source code is very simple but causes a linker error... > [...] > > - Matlabworkspace set to C-Code Workspace > - MATLAB Version 7.1.0.124 (R14) Service Pack 3 > !!!But I get a Linker error although everything is successfully > included: > [Linker error] undefined reference to `engOpen' > [...] as titus said, you will have to link the matlab engine library. most likely you will have to include somethin like this in the linking stage: -L/path/to/engine -leng -L instructs the compiler to add the specified path to the search directories (it should be something like $matlabroot/bin/$arch where $matlabroot is the installation directory of matlab and $arch is the architecture. -l instructs to link the engine library (probably called eng.dll on windows, i don't really know. on linux it is called libeng.so). if you don't have a separate linking stage, add the line to your last compiler command. @titus: afaik the mingw compiler is a windows port of gcc, so it should work. michael |