Carlo Bramini fixed the build for msys+mingw. Bug #1943976.

src/libssh2_priv.h

@@ -91,6 +91,41 @@
 #include "openssl.h"
 #endif
 
+#ifdef HAVE_WINSOCK2_H
+
+#include <winsock2.h>
+#include <mswsock.h>
+#include <ws2tcpip.h>
+
+/* same as WSABUF */
+struct iovec {
+	u_long iov_len;
+	char *iov_base;
+};
+
+#ifdef _MSC_VER
+/* "inline" keyword is valid only with C++ engine! */
+#define inline __inline
+#endif
+
+static inline int writev(int sock, struct iovec *iov, int nvecs)
+{
+	DWORD ret;
+	if (WSASend(sock, (LPWSABUF)iov, nvecs, &ret, 0, NULL, NULL) == 0) {
+		return ret;
+	}
+	return -1;
+}
+
+/* not really usleep, but safe for the way we use it in this lib */
+static inline int usleep(int udelay)
+{
+	Sleep(udelay / 1000);
+	return 0;
+}
+
+#endif
+
 /* RFC4253 section 6.1 Maximum Packet Length says:
  *
  * "All implementations MUST be able to process packets with