Is this the first time you are building FBNeo ? Those calls to the round function aren't new, they have been there since 2018 when the project was still called FB Alpha.
I
think some compilers might need math.h for round to work, it might be the case for that old msvc version of yours.
I pushed a possible fix for your issue :
https://github.com/finalburnneo/FBNeo/commit/4792faeee42913048ba0da6d39157b883da39181.
However, are you sure you are using our official repo and its included vcxproj files ? Because i don't understand where this "FB Alpha Compilation using Visual Studio 11 (VC toolkit) Done." message could be coming from if you do.
We also provide official binaries :
https://github.com/finalburnneo/FBNeo/releases/tag/latestPlease note that the compiler we officially support is
gcc.