Recursive calloc() due to optimization

[Sebastian Huber <sebastian dot huber at embedded-brains dot de>]

Hello,

I updated to GCC 5 and now it turns the RTEMS calloc() implementation into

Disassembly of section .text:

00000000 <calloc>:
   0:   fb01 f000       mul.w   r0, r1, r0
   4:   2101            movs    r1, #1
   6:   f7ff bffe       b.w     0 <calloc>
   a:   bf00            nop

on ARM. How can I disable this optimization? I tried

__attribute__((__optimize__("-fno-builtin")))
void *calloc(
  size_t nelem,
  size_t elsize
)
{
  char   *cptr;
  size_t  length;

  length = nelem * elsize;
  cptr = malloc( length );
  if ( cptr )
    memset( cptr, '\0', length );

  return cptr;
}

but this doesn't work. It this one of the -fno-tree-* options?

--
Sebastian Huber, embedded brains GmbH

Address : Dornierstr. 4, D-82178 Puchheim, Germany
Phone   : +49 89 189 47 41-16
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E-Mail  : sebastian.huber@embedded-brains.de
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