Genex: Only evaluate TARGET_OBJECTS to determine target sources.

The output of this expression may contain macros for IDEs to replace
such as $(Configuration), $(CURRENT_ARCH) etc.  To avoid generating
content which is not usable in other contexts, report an error if
there is an attempt to use it in other contexts.

This commit may be reverted in the future if a solution to the
above difference is implemented.

9 files changed, 20 insertions, 30 deletions

diff --git a/Tests/RunCMake/TargetObjects/NotObjlibTarget-result.txt b/Tests/RunCMake/TargetObjects/BadContext-result.txt
index d00491f..d00491f 100644
--- a/Tests/RunCMake/TargetObjects/NotObjlibTarget-result.txt
+++ b/Tests/RunCMake/TargetObjects/BadContext-result.txt
diff --git a/Tests/RunCMake/TargetObjects/BadContext-stderr.txt b/Tests/RunCMake/TargetObjects/BadContext-stderr.txt
new file mode 100644
index 0000000..92f2c91
--- /dev/null
+++ b/Tests/RunCMake/TargetObjects/BadContext-stderr.txt
@@ -0,0 +1,17 @@
+CMake Error at BadContext.cmake:2 \(file\):
+  Error evaluating generator expression:
+
+    \$<TARGET_OBJECTS:NoTarget>
+
+  The evaluation of the TARGET_OBJECTS generator expression is only suitable
+  for consumption by CMake.  It is not suitable for writing out elsewhere.
+Call Stack \(most recent call first\):
+  CMakeLists.txt:3 \(include\)
++
+CMake Error:
+  Error evaluating generator expression:
+
+    \$<TARGET_OBJECTS:NoTarget>
+
+  The evaluation of the TARGET_OBJECTS generator expression is only suitable
+  for consumption by CMake.  It is not suitable for writing out elsewhere.
diff --git a/Tests/RunCMake/TargetObjects/NoTarget.cmake b/Tests/RunCMake/TargetObjects/BadContext.cmake
index f203c23..67962a4 100644
--- a/Tests/RunCMake/TargetObjects/NoTarget.cmake
+++ b/Tests/RunCMake/TargetObjects/BadContext.cmake
@@ -1,2 +1,4 @@
 
 file(GENERATE OUTPUT test_output CONTENT $<TARGET_OBJECTS:NoTarget>)
+
+install(FILES $<TARGET_OBJECTS:NoTarget> DESTINATION objects)
diff --git a/Tests/RunCMake/TargetObjects/NoTarget-result.txt b/Tests/RunCMake/TargetObjects/NoTarget-result.txt
deleted file mode 100644
index d00491f..0000000
--- a/Tests/RunCMake/TargetObjects/NoTarget-result.txt
+++ /dev/null
@@ -1 +0,0 @@
-1
diff --git a/Tests/RunCMake/TargetObjects/NoTarget-stderr.txt b/Tests/RunCMake/TargetObjects/NoTarget-stderr.txt
deleted file mode 100644
index 2c4f877..0000000
--- a/Tests/RunCMake/TargetObjects/NoTarget-stderr.txt
+++ /dev/null
@@ -1,8 +0,0 @@
-CMake Error at NoTarget.cmake:2 \(file\):
-  Error evaluating generator expression:
-
-    \$<TARGET_OBJECTS:NoTarget>
-
-  Objects of target "NoTarget" referenced but no such target exists.
-Call Stack \(most recent call first\):
-  CMakeLists.txt:3 \(include\)
diff --git a/Tests/RunCMake/TargetObjects/NotObjlibTarget-stderr.txt b/Tests/RunCMake/TargetObjects/NotObjlibTarget-stderr.txt
deleted file mode 100644
index bb83934..0000000
--- a/Tests/RunCMake/TargetObjects/NotObjlibTarget-stderr.txt
+++ /dev/null
@@ -1,8 +0,0 @@
-CMake Error at NotObjlibTarget.cmake:4 \(file\):
-  Error evaluating generator expression:
-
-    \$<TARGET_OBJECTS:StaticLib>
-
-  Objects of target "StaticLib" referenced but is not an OBJECT library.
-Call Stack \(most recent call first\):
-  CMakeLists.txt:3 \(include\)
diff --git a/Tests/RunCMake/TargetObjects/NotObjlibTarget.cmake b/Tests/RunCMake/TargetObjects/NotObjlibTarget.cmake
deleted file mode 100644
index c7f8a71..0000000
--- a/Tests/RunCMake/TargetObjects/NotObjlibTarget.cmake
+++ /dev/null
@@ -1,4 +0,0 @@
-
-add_library(StaticLib empty.cpp)
-
-file(GENERATE OUTPUT test_output CONTENT $<TARGET_OBJECTS:StaticLib>)
diff --git a/Tests/RunCMake/TargetObjects/RunCMakeTest.cmake b/Tests/RunCMake/TargetObjects/RunCMakeTest.cmake
index 30b9fee..85c76e2 100644
--- a/Tests/RunCMake/TargetObjects/RunCMakeTest.cmake
+++ b/Tests/RunCMake/TargetObjects/RunCMakeTest.cmake
@@ -1,4 +1,3 @@
 include(RunCMake)
 
-run_cmake(NoTarget)
-run_cmake(NotObjlibTarget)
+run_cmake(BadContext)
diff --git a/Tests/RunCMake/TargetObjects/empty.cpp b/Tests/RunCMake/TargetObjects/empty.cpp
deleted file mode 100644
index bfbbdde..0000000
--- a/Tests/RunCMake/TargetObjects/empty.cpp
+++ /dev/null
@@ -1,7 +0,0 @@
-#ifdef _WIN32
-__declspec(dllexport)
-#endif
-int empty()
-{
-  return 0;
-}