diff --git a/common/fltk/CMake/posixScandir.cxx b/common/fltk/CMake/posixScandir.cxx
new file mode 100644
index 0000000..ea57e9c
--- /dev/null
+++ b/common/fltk/CMake/posixScandir.cxx
@@ -0,0 +1,10 @@
+
+#include <dirent.h>
+
+int func (const char *d, dirent ***list, void *sort) {
+  int n = scandir(d, list, 0, (int(*)(const dirent **, const dirent **))sort);
+}
+
+int main() {
+  return 0;
+}