[Gc] GC_MALLOC doesn't compile..

Boehm, Hans hans.boehm at hp.com
Thu Mar 9 15:24:06 PST 2006

It looks like you either:
- forgot to link against the gc library, or
- forgot the -c on the gcc command line,
depending on whether or not you had intended to link the program.
In any future posts, please include the GC version and platform (e.g.


	From: gc-bounces at napali.hpl.hp.com
[mailto:gc-bounces at napali.hpl.hp.com] On Behalf Of Renaud Dubois
	Sent: Thursday, March 09, 2006 2:06 PM
	To: gc at napali.hpl.hp.com
	Subject: [Gc] GC_MALLOC doesn't compile..
	I'm writing a compilation option to add the C garbage collector
in my program:
	/* for the garbage collector */
	#include "gc.h"
	#define malloc(n)               GC_MALLOC(n)
	I have set the GC_INIT in the header of the main().
	int main(int argc, char **argv){
	        int register i = 0;
	        int fdcom;
	And for the "free()":
	        /* free dynamic memory */
	But when i try to compile, I have the following error:
	gcc -I/usr/local/include/ -DDEBUG -DGARBAGE_COLLECTOR -O2
-march=i486 -Wall   -o module1 module1.o
	module1.o: In function `initialisation_tab_flow_struct':
	module1.c:(.text+0x3ad): undefined reference to `GC_malloc'
	collect2: ld returned 1 exit status
	make: *** [module1] Error 1
	"initialisation_tab_flow_struct" is a small function where I do
a malloc call:
	       if((tab_flow = malloc(number * sizeof(struct flow))) ==
	                perror_time("Memory allocation failed !\n");
	Thank you for your help..
	Yours faithfully,
	Renaud Dubois

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