On Wed, 25 Mar 2015, Sebastian Huber wrote:
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?
-fno-builtin is good, but you cannot use it in an optimize attribute.
--
Marc Glisse
