[Bug c/53079] Unwanted optimization occurs on function with the same name as a math.h function without including math.h nor linking with libm

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53079

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-04-23 
01:19:48 UTC ---
This is expected.  If you don't want floor to be considered a builtin, then use
-fno-builtin-floor .  The C standard even says the name is in the reversed
namespace really.