Genex: Evaluate TARGET_OBJECTS as a normal expression.

Tests/GeneratorExpression/CMakeLists.txt

@@ -258,3 +258,17 @@ set(CMP0044_TYPE NEW)
 add_subdirectory(CMP0044 ${CMAKE_BINARY_DIR}/CMP0044-NEW)
 set(CMP0044_TYPE OLD)
 add_subdirectory(CMP0044 ${CMAKE_BINARY_DIR}/CMP0044-OLD)
+
+add_library(objlib OBJECT objlib1.c objlib2.c)
+file(GENERATE
+  OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/objlib_files"
+  CONTENT "$<JOIN:$<TARGET_OBJECTS:objlib>,\n>\n"
+)
+add_custom_target(check_object_files ALL
+  COMMAND ${CMAKE_COMMAND}
+    "-DOBJLIB_LISTFILE=${CMAKE_CURRENT_BINARY_DIR}/objlib_files"
+    -DTEST_CONFIGURATION=${CMAKE_BUILD_TYPE}
+    -DEXPECTED_NUM_OBJECTFILES=2
+    -P "${CMAKE_CURRENT_SOURCE_DIR}/check_object_files.cmake"
+  DEPENDS objlib
+)

Tests/GeneratorExpression/check_object_files.cmake

@@ -0,0 +1,48 @@
+
+if (NOT EXISTS ${OBJLIB_LISTFILE})
+  message(SEND_ERROR "Object listing file \"${OBJLIB_LISTFILE}\" not found!")
+endif()
+
+file(STRINGS ${OBJLIB_LISTFILE} objlib_files)
+
+list(LENGTH objlib_files num_objectfiles)
+if (NOT EXPECTED_NUM_OBJECTFILES EQUAL num_objectfiles)
+  message(SEND_ERROR "Unexpected number of entries in object list file (${num_objectfiles} instead of ${EXPECTED_NUM_OBJECTFILES})")
+endif()
+
+foreach(objlib_file ${objlib_files})
+  set(file_exists False)
+  if (EXISTS ${objlib_file})
+    set(file_exists True)
+  endif()
+
+  if (NOT file_exists)
+    if (objlib_file MATCHES ".(CURRENT_ARCH)")
+      string(REPLACE "$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME)" "*" config_file "${objlib_file}")
+      string(REPLACE "$(PROJECT_NAME)" "GeneratorExpression" config_file "${config_file}")
+      string(REPLACE "$(CURRENT_ARCH)" "*" config_file "${config_file}")
+      file(GLOB_RECURSE files "${config_file}")
+      list(LENGTH files num_files)
+      if (NOT files)
+        message(SEND_ERROR "Got no files for expression ${config_file}")
+      endif()
+      set(file_exists True)
+    else()
+      foreach(config_macro "$(Configuration)" "$(OutDir)" "$(IntDir)")
+        string(REPLACE "${config_macro}" "${TEST_CONFIGURATION}" config_file "${objlib_file}")
+        list(APPEND attempts ${config_file})
+        if (EXISTS ${config_file})
+          set(file_exists True)
+        endif()
+      endforeach()
+    endif()
+  endif()
+
+  if (NOT file_exists)
+    if(attempts)
+      list(REMOVE_DUPLICATES attempts)
+      set(tried "  Tried ${attempts}")
+    endif()
+    message(SEND_ERROR "File \"${objlib_file}\" does not exist!${tried}")
+  endif()
+endforeach()

Tests/GeneratorExpression/objlib1.c

@@ -0,0 +1,5 @@
+
+void objlib1()
+{
+
+}

Tests/GeneratorExpression/objlib2.c

@@ -0,0 +1,5 @@
+
+void objlib2()
+{
+
+}