Add compat bits for libtls on Windows

tls/CMakeLists.txt

@@ -19,6 +19,16 @@ set(
 	tls_verify.c
 )
 
+if(CMAKE_HOST_WIN32)
+set(
+	TLS_SRC
+	${TLS_SRC}
+	compat/ftruncate.c
+	compat/getuid.c
+	compat/pread.c
+	compat/pwrite.c
+)
+endif()
 
 if(NOT "${OPENSSLDIR}" STREQUAL "")
 	add_definitions(-D_PATH_SSL_CA_FILE=\"${OPENSSLDIR}/cert.pem\")