It might be a duplicate of bug 51205 but it's happening again.

[test.cpp]
typedef void (*action_t)(const unsigned char*);

extern "C" void _start(action_t action)
{
  const unsigned char foo[256] = {};

  action(foo);
}

typedef __SIZE_TYPE__ size_t;

extern "C"
void*
//__attribute__((externally_visible)) // Workaround
memset(void* dst, int c, size_t len)
{
  unsigned char * d = (unsigned char*)dst;

  while(len--)
    *d++ = c;

  return dst;
}

[error]
$ arm-none-linux-gnueabi-g++ -fno-exceptions -nostartfiles -static -nostdlib -nodefaultlibs -flto test.cpp -o test
`memset' referenced in section `.text' of /tmp/cc7ooAE0.ltrans0.ltrans.o: defined in discarded section `.text' of /tmp/ccVDnjy6.o (symbol from plugin)
collect2: error: ld returned 1 exit status

[versions]
arm-none-linux-gnueabi-g++ --version : 4.8.1
arm-none-linux-gnueabi-ld --version : 2.23.2