4 files changed, 23 insertions, 2 deletions
diff --git a/Tests/InterfaceLibrary/CMakeLists.txt b/Tests/InterfaceLibrary/CMakeLists.txt
index 81b34e6e45..d4f49c21be 100644
--- a/Tests/InterfaceLibrary/CMakeLists.txt
+++ b/Tests/InterfaceLibrary/CMakeLists.txt
@@ -8,8 +8,18 @@ target_compile_definitions(iface_nodepends INTERFACE IFACE_DEFINE)
 
 add_subdirectory(headerdir)
 
+# Add an interface target in a subdirectory that uses an imported interface.
+add_subdirectory(ifacedir)
+
+# Poison an imported interface with the same name as that in the subdir
+# to ensure that the transitive lookup occurs in the subdir.
+add_library(imp::iface INTERFACE IMPORTED)
+set_property(TARGET imp::iface APPEND PROPERTY COMPATIBLE_INTERFACE_BOOL SOMEPROP)
+set_property(TARGET imp::iface PROPERTY INTERFACE_SOMEPROP OFF)
+set_property(TARGET imp::iface PROPERTY INTERFACE_SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/does_not_exist.cpp)
+
 add_executable(InterfaceLibrary definetestexe.cpp)
-target_link_libraries(InterfaceLibrary iface_nodepends headeriface)
+target_link_libraries(InterfaceLibrary iface_nodepends headeriface subiface)
 
 add_subdirectory(libsdir)
 
diff --git a/Tests/InterfaceLibrary/definetestexe.cpp b/Tests/InterfaceLibrary/definetestexe.cpp
index e7a10c171f..30f292542b 100644
--- a/Tests/InterfaceLibrary/definetestexe.cpp
+++ b/Tests/InterfaceLibrary/definetestexe.cpp
@@ -15,7 +15,9 @@
 #error Expected IFACE_HEADER_BUILDDIR
 #endif
 
+extern int sub();
+
 int main(int,char**)
 {
-  return 0;
+  return sub();
 }
diff --git a/Tests/InterfaceLibrary/ifacedir/CMakeLists.txt b/Tests/InterfaceLibrary/ifacedir/CMakeLists.txt
new file mode 100644
index 0000000000..228715e756
--- /dev/null
+++ b/Tests/InterfaceLibrary/ifacedir/CMakeLists.txt
@@ -0,0 +1,8 @@
+add_library(imp::iface INTERFACE IMPORTED)
+set_property(TARGET imp::iface APPEND PROPERTY COMPATIBLE_INTERFACE_BOOL SOMEPROP)
+set_property(TARGET imp::iface PROPERTY INTERFACE_SOMEPROP ON)
+set_property(TARGET imp::iface PROPERTY INTERFACE_SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/sub.cpp)
+
+add_library(subiface INTERFACE)
+target_link_libraries(subiface INTERFACE imp::iface)
+set_property(TARGET subiface PROPERTY INTERFACE_SOMEPROP ON)
diff --git a/Tests/InterfaceLibrary/ifacedir/sub.cpp b/Tests/InterfaceLibrary/ifacedir/sub.cpp
new file mode 100644
index 0000000000..165a66adbf
--- /dev/null
+++ b/Tests/InterfaceLibrary/ifacedir/sub.cpp
@@ -0,0 +1 @@
+int sub() { return 0; }