Always consider includes from IMPORTED targets to be SYSTEM.

Introduce a target property to control this behavior variable
to set the default value for the target property.

This does not affect try_compile runs.

1 files changed, 7 insertions, 0 deletions

diff --git a/Tests/ExportImport/Export/systemlib.cpp b/Tests/ExportImport/Export/systemlib.cpp
new file mode 100644
index 0000000..ec45148
--- /dev/null
+++ b/Tests/ExportImport/Export/systemlib.cpp
@@ -0,0 +1,7 @@
+
+#include "systemlib.h"
+
+SystemStruct::SystemStruct()
+{
+
+}