On 17/04/10 00:03, Emmanuel Benisty wrote:

Just out of curiosity, what is the plan regarding this issue (quoted from the gcc changelog):

On x86 targets, code containing floating-point calculations may run significantly slower when compiled with GCC 4.5 in strict C99 conformance mode than they did with earlier GCC versions. This is due to stricter standard conformance of the compiler and can be avoided by using the option -fexcess-precision=fast;

From what I understand, this requires passing -std=c99 (or equivalent) to the compiler for it to use strict C99 mode. So most software will not be affected. Of course, the maintainer of any software the does set C99 mode should consider this. Allan