Genex: Do not consider 'head' when evaluating build properties

When $<TARGET_PROPERTY> names a build property like COMPILE_DEFINITIONS
but not the usage requirement (INTERFACE_) version of it, the value
should be that used to build the target.  It should not be influenced by
a dependent 'head' target like usage requirements are.

Extend the CompileDefinitions test with a case covering the corrected
behavior.

Reviewed-by: Stephen Kelly <steveire@gmail.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/Tests/CompileDefinitions/target_prop/usetgt.c b/Tests/CompileDefinitions/target_prop/usetgt.c
new file mode 100644
index 0000000..6672a3e
--- /dev/null
+++ b/Tests/CompileDefinitions/target_prop/usetgt.c
@@ -0,0 +1,10 @@
+#ifndef TGT_DEF
+# error TGT_DEF incorrectly not defined
+#endif
+#ifndef TGT_TYPE_STATIC_LIBRARY
+# error TGT_TYPE_STATIC_LIBRARY incorrectly not defined
+#endif
+#ifdef TGT_TYPE_EXECUTABLE
+# error TGT_TYPE_EXECUTABLE incorrectly defined
+#endif
+int main(void) { return 0; }