gcc compiler fix 4

gwaldron · gwaldron · commit 901b14bce586 · 2024-02-09T15:59:52.000-05:00
diff --git a/src/osgEarth/Threading.cpp b/src/osgEarth/Threading.cpp
@@ -26,6 +26,7 @@
 #   include <unistd.h>
 #   include <sys/syscall.h>
 #   include <pthread.h>
+#   include <cstring>
 #endif
 
 // define the threading library singleton
