Fix logging.

src/protocols/vnc/log.c

@@ -34,7 +34,15 @@
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
+
+/*
+ * Syslog does not exist on Windows, so we'll just log directly to std error.
+ * TODO: ReportEvent() might be sort of equivalent? Look into
+ * https://learn.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-reporteventa
+ */
+#ifndef WINDOWS_BUILD
 #include <syslog.h>
+#endif
 
 void guac_vnc_client_log_info(const char* format, ...) {
 
@@ -46,8 +54,12 @@ void guac_vnc_client_log_info(const char* format, ...) {
     vsnprintf(message, sizeof(message), format, args);
     va_end(args);
 
+#ifndef WINDOWS_BUILD
     /* Log to syslog */
     syslog(LOG_INFO, "%s", message);
+#else
+    fprintf(stderr, "INFO: %s\n", message);
+#endif
 
 }
 
@@ -61,8 +73,12 @@ void guac_vnc_client_log_error(const char* format, ...) {
     vsnprintf(message, sizeof(message), format, args);
     va_end(args);
 
+#ifndef WINDOWS_BUILD
     /* Log to syslog */
     syslog(LOG_ERR, "%s", message);
+#else
+    fprintf(stderr, "ERROR: %s\n", message);
+#endif
 
 }