during make install :

collect2: ld returned 2 exit status
ld: Undefined symbol 
   _memmove 
*** Error code 1
make: Fatal error: Command failed for target `php'

list from config.log :

from config.log
configure:2460: checking for memmove
configure:2488: gcc -o conftest -g -O2   conftest.c -lm  1>&5
collect2: ld returned 2 exit status
ld: Undefined symbol
   _memmove
configure: failed program was:
#line 2465 "configure"
#include "confdefs.h"
/* System header to define __stub macros and hopefully few prototypes,
    which can conflict with char memmove(); below.  */
#include <assert.h>
/* Override any gcc2 internal prototype to avoid an error.  */
/* We use char because int might match the return type of a gcc2
    builtin and then its argument prototype would still apply.  */
char memmove();