Just in case: don't include <unistd.h> on Windows.
Just in case: don't include <unistd.h> on Windows.

HeliumProject/mongo-c,Elastica/mongo-c-driver-legacy,mongodb/mongo-c-driver-legacy,mongodb/mongo-c-driver-legacy,Elastica/mongo-c-driver-legacy,Elastica/mongo-c-driver-legacy,Elastica/mongo-c-driver-legacy,HeliumProject/mongo-c,mongodb/mongo-c-driver-legacy,HeliumProject/mongo-c,mongodb/mongo-c-driver-legacy,HeliumProject/mongo-c