Conditionally include unistd.h

diff --git a/expat/xmlwf/xmlwf.c b/expat/xmlwf/xmlwf.c
index 3b574dc70a1e9fd0674d7708d1062a5f88c26d18..1eb78d4e815db4ac80dee16d297a3e5f1a692de2 100755 (executable)
--- a/expat/xmlwf/xmlwf.c
+++ b/expat/xmlwf/xmlwf.c
@@ -31,6 +31,10 @@ Contributor(s):
 #include <io.h>
 #endif
 
+#ifdef _POSIX_SOURCE
+#include <unistd.h>
+#endif
+
 #ifndef O_BINARY
 #ifdef _O_BINARY
 #define O_BINARY _O_BINARY