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undefined reference to `init_mempool

Qiang Cheng

i am using Keil uVision3 + ADUC7026, i am trying to allocate

#include <ADuC7026.h>
#include "stdio.h"
#include "stdlib.h"

unsigned char memory_pool[0x400];
int main (void) {
int *i;
init_mempool (memory_pool, sizeof(memory_pool));
i = malloc(sizeof(int));
}

warning: implicit declaration of function 'init_mempool'
..........
error: undefined reference to 'init_mempool'

can someone help me ,why can't find init_mempool? "Do not use Standart Libriries" is uncheckt. and the system can find malloc.

thanks

Parents
  • 0 in reply to Qiang Cheng

    Well, that's the same version I used and the following compiled just fine.

    #include <ADuC7026.h>
#include "stdio.h"
#include "stdlib.h"

unsigned char memory_pool[0x400];
int main (void) {
int *i;
init_mempool (memory_pool, sizeof(memory_pool));
i = malloc(sizeof(int));

while (1);
}

    Maybe there is additional information which you have not told us. I also assumed that since you're using the Keil memory allocation routines that you have setup the tools to use the Keil compiler (and not the GNU or Realview compilers).

    Jon

Reply
  • 0 in reply to Qiang Cheng

    Well, that's the same version I used and the following compiled just fine.

    #include <ADuC7026.h>
#include "stdio.h"
#include "stdlib.h"

unsigned char memory_pool[0x400];
int main (void) {
int *i;
init_mempool (memory_pool, sizeof(memory_pool));
i = malloc(sizeof(int));

while (1);
}

    Maybe there is additional information which you have not told us. I also assumed that since you're using the Keil memory allocation routines that you have setup the tools to use the Keil compiler (and not the GNU or Realview compilers).

    Jon

Children
  • 0 in reply to Jon Ward

    thanks Jon, thanks Drew.
    problem solved. i used GNU, hence the problem...

  • 0 in reply to Qiang Cheng

    When you start an ARM project, you should first to select the compiler (Keil CARM, GNU, or ARM ADS/RealView) you want to use.

    init_mempool is only part of the Keil CARM Compiler run-time library. For using this function, it is required that you setup a project using the Keil CARM compiler. See Getting Started User's Guide (GSA.CHM, Development Tools, Select the Toolset).

    For using malloc with Keil CARM you need to call the init_mempool function. See: http://www.keil.com/support/man/docs/ca/ca_init_mempool.htm

    For using malloc with GNU Compiler you need a more complex setup.
    See example: Keil\ARM\GNU\Examples\Memory. However, due to the nature of the GNU run-time library (it has a clustering of 32KB and requires a minimum RAM of 32KB) you cannot use malloc on single chip devices.

    Therefore you should consider to use the Keil CARM compiler instead, since the run-time library is designed for single chip systems.

    Reinhard