problem with C99 functions prototipes on Intel C 2017

Hi, 

I keep my Intel C compiler 2013 until recently. A few days ago I bought the 2017 version. The Intel C 2017 is integrated with VS 2015, Community Edition. 

I frequently use functions such as sincos() and sincosf().  With Intel C 2013, it is OK. But when I use the new compiler it complains for lack of prototipe, at compilation time, but after that the linker correctly find and link the symbol. The include of Intel Math library is present:

#include <mathimf.h>

And the language is specified as :  /Qstd=c99.   Were sincos() and sincosf() removed form mathimf.h ?

Thanks ,

Armando