Compiler warning from ethernet library together with vMicro in MS Visual Studio 2017

[Spyy]

Hi,

with the above combination i am getting compiler warnings:

Compiling debug version of 'TestProjekt' for 'Teensy 3.6'
w5100.cpp: In static member function static uint8_t W5100Class::init()
w5100.cpp: 86:39: warning: 'void SPIFIFOclass::begin(uint8_t, uint32_t, uint32_t)' is deprecated [-Wdeprecated-declarations]
SPIFIFO.begin(ss_pin, SPI_CLOCK_12MHz); \\ W5100 is 14 MHz max

w5100.cpp:13: In file included from
SPIFIFO.h:231: note declared here
inline void begin(uint8_t pin, uint32_t speed, uint32_t mode=SPI_MODE0) __attribute__((always_inline, deprecated)) {
Program size: 14.340 bytes (used 1% of a 1.048.576 byte maximum) (11,17 secs)
Minimum Memory Usage: 5040 bytes (2% of a 262144 byte maximum)

from this:

uint8_t W5100Class::init(void)
{
uint16_t TXBUF_BASE, RXBUF_BASE;
uint8_t i;

// Many Ethernet shields have a CAT811 or similar reset chip
// connected to W5100 or W5200 chips. The W5200 will not work at
// all, and may even drive its MISO pin, until given an active low
// reset pulse! The CAT811 has a 240 ms typical pulse length, and
// a 400 ms worst case maximum pulse length. MAX811 has a worst
// case maximum 560 ms pulse length. This delay is meant to wait
// until the reset pulse is ended. If your hardware has a shorter
// reset time, this can be edited or removed.
delay(560);
//Serial.println("w5100 init");

#ifdef USE_SPIFIFO
SPI.begin();
SPIFIFO.begin(ss_pin, SPI_CLOCK_12MHz); // W5100 is 14 MHz max
#else
SPI.begin();
initSS();
resetSS();
#endif

Mysterious is that this comes from the section #ifdef USE_SPIFIFO which is marked from the IDE as not active.

Is there someone who can help me here..

Thank you

Torsten