RakNet VS2015

1>------ Build started: Project: RakNetDLL, Configuration: Debug Win32 ------
1>  Base64Encoder.cpp
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\exception(361): warning C4577: 'noexcept' used with no exception handling mode specified; termination on exception is not guaranteed. Specify /EHsc
1>  CCRakNetSlidingWindow.cpp
1>E:\Xitano\CPP\DevTools2\Build\RakNet-4.081\Source\CCRakNetSlidingWindow.cpp(221): error C2668: 'abs': ambiguous call to overloaded function
1>  C:\Program Files (x86)\Windows Kits\10\Include\10.0.10150.0\ucrt\stdlib.h(359): note: could be '__int64 abs(const __int64) throw()'
1>  C:\Program Files (x86)\Windows Kits\10\Include\10.0.10150.0\ucrt\stdlib.h(354): note: or       'long abs(const long) throw()'
1>  C:\Program Files (x86)\Windows Kits\10\Include\10.0.10150.0\ucrt\stdlib.h(284): note: or       'int abs(int)'
1>  E:\Xitano\CPP\DevTools2\Build\RakNet-4.081\Source\CCRakNetSlidingWindow.cpp(221): note: while trying to match the argument list '(double)'
1>  CCRakNetUDT.cpp
1>  EpochTimeToString.cpp
1>  NatPunchthroughServer.cpp
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\exception(361): warning C4577: 'noexcept' used with no exception handling mode specified; termination on exception is not guaranteed. Specify /EHsc
1>  RakNetSocket2_Berkley_NativeClient.cpp
1>  ReliabilityLayer.cpp
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\xlocale(341): warning C4530: C++ exception handler used, but unwind semantics are not enabled. Specify /EHsc
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\exception(361): warning C4577: 'noexcept' used with no exception handling mode specified; termination on exception is not guaranteed. Specify /EHsc
1>  Generating Code...
========== Build: 0 succeeded, 1 failed, 1 up-to-date, 0 skipped ==========

I don't know if you every resolved it but in VS 2015 the overloaded abs(double) method was removed from math.h. Change the #include <math.h> to #include and it will compile

Same issue here. How do you fix this? The above commenter says change the #incldue to #include and it will compile. That doesn't make any sense so I'm guessing he's missing some words there.

You have to change

#include <math.h>

to

#include <cmath>

in

CRakNetSlidingWindow.cpp
That will fix it. The previous commenter had the same thing written, in tags that Markdown parsed as a special thing. That's why it didn't show up