Genex: Reject TARGET_OBJECTS on non-object libraries earlier

Move the diagnostic that rejects the TARGET_OBJECTS generator expression
in non-buildsystem context until after the check for whether the named
target is an object library.  This order will makes more sense than the
previous order once TARGET_OBJECTS is allowed in non-buildsystem
context.

1 files changed, 24 insertions, 0 deletions

diff --git a/Tests/RunCMake/TargetObjects/NoTarget-stderr.txt b/Tests/RunCMake/TargetObjects/NoTarget-stderr.txt
new file mode 100644
index 0000000..eadccaf
--- /dev/null
+++ b/Tests/RunCMake/TargetObjects/NoTarget-stderr.txt
@@ -0,0 +1,24 @@
+(CMake Error at NoTarget.cmake:4 \(file\):
+  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 \(include\)
+*)+
+(CMake Error at NoTarget.cmake:5 \(file\):
+  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 \(include\)
+*)+
+CMake Error:
+  Error evaluating generator expression:
+
+    \$<TARGET_OBJECTS:NoTarget>
+
+  Objects of target "NoTarget" referenced but no such target exists.