if !defined( _WIN32 )

i have a problem:
my code was mostly compiled on unix machines.
now we want to compile it on windows machines.
However, we have a first problem: unistd.h seems not to be available via visual studio/windows.

So I put that include-statement within the following #if-block:

#if !defined( _WIN32 )
#include <unistd.h>
#endif

Is this the best i could have done in this case?

thank you

Yes, the standard approach is to wrap platform specific includes in Preprocessor #if / #else blocks.