> Those underscore-prefixed names are defined in Microsoft's
> <float.h>[3][4]. So now I'm wondering if win32_port.h needs to
> #include <float.h> if (_MSC_VER < 1800).
I don't have the C experience to decide the correct way. There are
currently many .c files that are including float.h conditionally or
unconditionally. The condition they use is "#ifdef _MSC_VER" without
a version.
One idea is to include float.h from the new utils/float.h file
together with math.h, and remove those includes from the .c files
which would include utils/float.h. We can do this only, or together
with what you suggest, or by also keeping the includes on the .c
files. Which way do you think is the proper?