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Re: MathLink - Linux - Calling the Kernel from External Program - undefined reference to `shm_open'

• To: mathgroup at smc.vnet.net
• Subject: [mg114163] Re: MathLink - Linux - Calling the Kernel from External Program - undefined reference to `shm_open'
• From: Patrick Scheibe <pscheibe at trm.uni-leipzig.de>
• Date: Thu, 25 Nov 2010 07:07:30 -0500 (EST)
• References: <201011251056.FAA21772@smc.vnet.net>

Hi,

you forgot to linke the right libraries

-lm -lpthread -lrt

as described in the MathLink tutorial
tutorial/MathLinkDeveloperGuide-UnixOverview

Cheers
Patrick

On Nov 25, 2010, at 11:56 AM, Klemen Dovrtel wrote:

> Hello everybody,
>
> I would like to test a simple program i found in a MathLink tutorial =
(http://www.edenwaith.com/development/tutorials/mathlink/ML_Tut.pdf). I =
added the path to Mathematica libs and headers, but when i compile the =
code, i get the "undefined reference to `shm_open'" error (and some =
other errors). Any idea why is that? I searched the Archives and I =
couldn't find such problem.
>
> I tried to include the shm.h header i found (/usr/include/bits/shm.h, =
/usr/include/linux/shm.h, /usr/include/sys/shm.h), but no luck.
>
> I am using Ubuntu 10.04 and Mathematica 7.
>
> Best Regards
> Klemen
>
>
> ------------------------------------------------------------------
> CODE
>
> #include <stdio.h>
> #include "mathlink.h"
> #include <shm.h>
>
>
> int main(int argc, char * argv[ ])
> {
> 	int i, j, sum;
> 	MLINK lp;
> 	int pkt;
> 	MLEnvironment env;
> =09
> 	printf( "Enter two integers:\n\t" );
> 	scanf( "%d %d", &i, &j);
> =09
> 	env = MLInitialize(NULL);
> 	if(env == NULL) return 1;
> 	lp = MLOpen(argc, argv);
> 	if(lp == NULL) return 1;
> =09
> 	/* Send Plus[i, j] */
> 	MLPutFunction(lp, "Plus", 2);
> 		MLPutInteger(lp, i);
> 		MLPutInteger(lp, j);
> 	MLEndPacket(lp);
> =09
> 	/* skip any packets before the first ReturnPacket */
> 	while (MLNextPacket(lp) != RETURNPKT) MLNewPacket(lp);
> =09
> 	/* inside the ReturnPacket we expect an integer */
> 	MLGetInteger(lp, &sum);
> =09
> 	printf( "sum = %d\n", sum);
> 	MLClose(lp);
> 	MLDeinitialize(env);
> 	return 0;
> }
>
> ------------------------------------------------------------------
> COMPILER ERRORS
>
> ----------Build Started--------
> /bin/sh -c '"make"  -j 2 -f "math_wsp.mk"'
> ----------Building project:[ mathematica1 - Debug ]----------
> make[1]: Entering directory `/home/klemen/c++/math'
> make[1]: Leaving directory `/home/klemen/c++/math'
> make[1]: Entering directory `/home/klemen/c++/math'
> gcc -c  "/home/klemen/c++/math/main.c" -g  -o ./Debug/main.o "-I." =
"-I." =
"-I/usr/local/Wolfram/Mathematica/7.0/SystemFiles/Links/MathLink/Developer=
Kit/Linux/CompilerAdditions" "-I/usr/include/sys/"
> gcc -o ./Debug/mathematica1 ./Debug/main.o  "-L." =
"-L/usr/local/Wolfram/Mathematica/7.0/SystemFiles/Links/MathLink/Developer=
Kit/Linux/CompilerAdditions"  -lML32i3 -lML32i3 
> =
/usr/local/Wolfram/Mathematica/7.0/SystemFiles/Links/MathLink/DeveloperKit=
/Linux/CompilerAdditions/libML32i3.so: undefined reference to `shm_open'
> =
/usr/local/Wolfram/Mathematica/7.0/SystemFiles/Links/MathLink/DeveloperKit=
/Linux/CompilerAdditions/libML32i3.so: undefined reference to `sem_init'
> =
/usr/local/Wolfram/Mathematica/7.0/SystemFiles/Links/MathLink/DeveloperKit=
/Linux/CompilerAdditions/libML32i3.so: undefined reference to =
`sem_unlink'
> =
/usr/local/Wolfram/Mathematica/7.0/SystemFiles/Links/MathLink/DeveloperKit=
/Linux/CompilerAdditions/libML32i3.so: undefined reference to =
`sem_close'
> =
/usr/local/Wolfram/Mathematica/7.0/SystemFiles/Links/MathLink/DeveloperKit=
/Linux/CompilerAdditions/libML32i3.so: undefined reference to =
`sem_destroy'
> =
/usr/local/Wolfram/Mathematica/7.0/SystemFiles/Links/MathLink/DeveloperKit=
/Linux/CompilerAdditions/libML32i3.so: undefined reference to =
`shm_unlink'
> =
/usr/local/Wolfram/Mathematica/7.0/SystemFiles/Links/MathLink/DeveloperKit=
/Linux/CompilerAdditions/libML32i3.so: undefined reference to =
`pthread_create'
> =
/usr/local/Wolfram/Mathematica/7.0/SystemFiles/Links/MathLink/DeveloperKit=
/Linux/CompilerAdditions/libML32i3.so: undefined reference to `sem_post'
> =
/usr/local/Wolfram/Mathematica/7.0/SystemFiles/Links/MathLink/DeveloperKit=
/Linux/CompilerAdditions/libML32i3.so: undefined reference to =
`sem_trywait'
> =
/usr/local/Wolfram/Mathematica/7.0/SystemFiles/Links/MathLink/DeveloperKit=
/Linux/CompilerAdditions/libML32i3.so: undefined reference to `sem_open'
> =
/usr/local/Wolfram/Mathematica/7.0/SystemFiles/Links/MathLink/DeveloperKit=
/Linux/CompilerAdditions/libML32i3.so: undefined reference to `sem_wait'
> =
/usr/local/Wolfram/Mathematica/7.0/SystemFiles/Links/MathLink/DeveloperKit=
/Linux/CompilerAdditions/libML32i3.so: undefined reference to =
`pthread_join'
> collect2: ld returned 1 exit status
> make[1]: *** [Debug/mathematica1] Error 1
> make[1]: Leaving directory `/home/klemen/c++/math'
> make: *** [All] Error 2
> ----------Build Ended----------
> 0 errors, 0 warnings
>
>
>
>
>
>
>
>
>
>

• References:
  • MathLink - Linux - Calling the Kernel from External Program - undefined reference to `shm_open'
    • From: Klemen Dovrtel <klemen_dovrtel@yahoo.com>