2 files changed, 15 insertions, 0 deletions
diff --git a/Tests/ExportImport/Export/Interface/CMakeLists.txt b/Tests/ExportImport/Export/Interface/CMakeLists.txt
index 00a5375..fd55c42 100644
--- a/Tests/ExportImport/Export/Interface/CMakeLists.txt
+++ b/Tests/ExportImport/Export/Interface/CMakeLists.txt
@@ -39,7 +39,11 @@ install(FILES
   DESTINATION src
 )
 
+add_library(cmakeonly INTERFACE)
+set_property(TARGET cmakeonly PROPERTY INTERFACE_COMPILE_DEFINITIONS [[DEF="\"\$\B"]])
+
 install(TARGETS headeronly sharediface use_auto_type use_c_restrict source_target
+                cmakeonly
   EXPORT expInterface
 )
 install(TARGETS sharedlib
diff --git a/Tests/ExportImport/Import/Interface/CMakeLists.txt b/Tests/ExportImport/Import/Interface/CMakeLists.txt
index 51d518e..c850508 100644
--- a/Tests/ExportImport/Import/Interface/CMakeLists.txt
+++ b/Tests/ExportImport/Import/Interface/CMakeLists.txt
@@ -99,3 +99,14 @@ add_executable(interfacetest_exp interfacetest.cpp)
 target_link_libraries(interfacetest_exp exp::sharediface)
 
 do_try_compile(exp)
+
+foreach(ns exp bld)
+  get_property(defs TARGET ${ns}::cmakeonly PROPERTY INTERFACE_COMPILE_DEFINITIONS)
+  if(NOT defs STREQUAL [[DEF="\"\$\B"]])
+    message(SEND_ERROR
+      "${ns}::cmakeonly property INTERFACE_COMPILE_DEFINITIONS is:\n"
+      " ${defs}\n"
+      "not\n"
+      " " [[DEF="\"\$\B"]] "\n")
+  endif()
+endforeach()