[PATCH] fix gamma symbol for static linking and new targets

[Szabolcs Nagy]

On 02/10/17 15:51, Joseph Myers wrote:
> On Mon, 2 Oct 2017, Szabolcs Nagy wrote:
> 
>> it seems drem and pow10 symbols are also affected.
> 
> pow10 is deliberately obsoleted and should not be present for new ports or 
> static linking and should be a compat symbol for existing ports.
> 
> We might reasonably consider doing the same for drem (it's an __USE_MISC 
> symbol, not from any supported standard, and an exact alias of remainder).
> 

i think drem is more widely used in existing code than pow10.

so i'd prefer to keep drem on new targets