This patch exists to avoid an infinite recursion in the fl_wrapper.
fl_wrapper catches the _exit() call in the redefined malloc() and 
indirectly calls malloc() again... not ideal.

--- cdrtools-2.01/conf/configure	2006-09-09 10:24:32.000000000 +0200
+++ cdrtools-2.01/conf/configure	2006-09-09 09:33:07.000000000 +0200
@@ -9362,27 +9362,24 @@
 #include "confdefs.h"
 
 static int mcalled;
-char *
+void *
 malloc(s)
-	int	s;
+	size_t	s;
 {
-	extern	char *sbrk();
-
 	mcalled++;
-	_exit(0);
-	return (sbrk(s));
+	return calloc(1, s);
 }
 
-free(p) char *p;{}
-	
 main()
 {
 #ifdef	HAVE_STRDUP
-	strdup("aaa");
+	char * pc = strdup("aaa");
+	if (pc) free(pc);
 #else
 	exit(0);
 #endif
-	exit(1);}
+	exit(mcalled == 0);
+}
 EOF
 if { (eval echo configure:9388: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then