From d9605897788d800e892de0d201a305046510d089 Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Fri, 1 Nov 2013 10:14:47 -0400
Subject: Genex: Reject $<TARGET_FILE:...> for object libraries (#14532)

Teach the cmGeneratorExpressionEvaluator filesystem artifact logic
to reject OBJECT_LIBRARY targets since they have no main artifact.
Without the explicit rejection evaluation falls through to an
internal CMake error message in cmTarget::GetOutputInfo.

Extend the RunCMake.GeneratorExpression test to cover these cases.
---
 Source/cmGeneratorExpressionEvaluator.cxx          |  2 +-
 .../BadTargetTypeObject-result.txt                 |  1 +
 .../BadTargetTypeObject-stderr.txt                 | 26 ++++++++++++++++++++++
 .../GeneratorExpression/BadTargetTypeObject.cmake  |  7 ++++++
 .../GeneratorExpression/RunCMakeTest.cmake         |  1 +
 Tests/RunCMake/GeneratorExpression/empty.c         |  0
 6 files changed, 36 insertions(+), 1 deletion(-)
 create mode 100644 Tests/RunCMake/GeneratorExpression/BadTargetTypeObject-result.txt
 create mode 100644 Tests/RunCMake/GeneratorExpression/BadTargetTypeObject-stderr.txt
 create mode 100644 Tests/RunCMake/GeneratorExpression/BadTargetTypeObject.cmake
 create mode 100644 Tests/RunCMake/GeneratorExpression/empty.c

diff --git a/Source/cmGeneratorExpressionEvaluator.cxx b/Source/cmGeneratorExpressionEvaluator.cxx
index abe4e70..8b31354 100644
--- a/Source/cmGeneratorExpressionEvaluator.cxx
+++ b/Source/cmGeneratorExpressionEvaluator.cxx
@@ -1277,7 +1277,7 @@ struct TargetFilesystemArtifact : public cmGeneratorExpressionNode
                     "No target \"" + name + "\"");
       return std::string();
       }
-    if(target->GetType() >= cmTarget::UTILITY &&
+    if(target->GetType() >= cmTarget::OBJECT_LIBRARY &&
       target->GetType() != cmTarget::UNKNOWN_LIBRARY)
       {
       ::reportError(context, content->GetOriginalExpression(),
diff --git a/Tests/RunCMake/GeneratorExpression/BadTargetTypeObject-result.txt b/Tests/RunCMake/GeneratorExpression/BadTargetTypeObject-result.txt
new file mode 100644
index 0000000..d00491f
--- /dev/null
+++ b/Tests/RunCMake/GeneratorExpression/BadTargetTypeObject-result.txt
@@ -0,0 +1 @@
+1
diff --git a/Tests/RunCMake/GeneratorExpression/BadTargetTypeObject-stderr.txt b/Tests/RunCMake/GeneratorExpression/BadTargetTypeObject-stderr.txt
new file mode 100644
index 0000000..533d38c
--- /dev/null
+++ b/Tests/RunCMake/GeneratorExpression/BadTargetTypeObject-stderr.txt
@@ -0,0 +1,26 @@
+CMake Error at BadTargetTypeObject.cmake:3 \(add_custom_target\):
+  Error evaluating generator expression:
+
+    \$<TARGET_FILE:objlib>
+
+  Target "objlib" is not an executable or library.
+Call Stack \(most recent call first\):
+  CMakeLists.txt:3 \(include\)
++
+CMake Error at BadTargetTypeObject.cmake:3 \(add_custom_target\):
+  Error evaluating generator expression:
+
+    \$<TARGET_SONAME_FILE:objlib>
+
+  Target "objlib" is not an executable or library.
+Call Stack \(most recent call first\):
+  CMakeLists.txt:3 \(include\)
++
+CMake Error at BadTargetTypeObject.cmake:3 \(add_custom_target\):
+  Error evaluating generator expression:
+
+    \$<TARGET_LINKER_FILE:objlib>
+
+  Target "objlib" is not an executable or library.
+Call Stack \(most recent call first\):
+  CMakeLists.txt:3 \(include\)
diff --git a/Tests/RunCMake/GeneratorExpression/BadTargetTypeObject.cmake b/Tests/RunCMake/GeneratorExpression/BadTargetTypeObject.cmake
new file mode 100644
index 0000000..c47ee2b
--- /dev/null
+++ b/Tests/RunCMake/GeneratorExpression/BadTargetTypeObject.cmake
@@ -0,0 +1,7 @@
+enable_language(C)
+add_library(objlib OBJECT empty.c)
+add_custom_target(check ALL COMMAND echo
+  $<TARGET_FILE:objlib>
+  $<TARGET_SONAME_FILE:objlib>
+  $<TARGET_LINKER_FILE:objlib>
+  )
diff --git a/Tests/RunCMake/GeneratorExpression/RunCMakeTest.cmake b/Tests/RunCMake/GeneratorExpression/RunCMakeTest.cmake
index 62bf29b..54d5064 100644
--- a/Tests/RunCMake/GeneratorExpression/RunCMakeTest.cmake
+++ b/Tests/RunCMake/GeneratorExpression/RunCMakeTest.cmake
@@ -7,4 +7,5 @@ run_cmake(BadNOT)
 run_cmake(BadStrEqual)
 run_cmake(BadZero)
 run_cmake(BadTargetName)
+run_cmake(BadTargetTypeObject)
 run_cmake(BadInstallPrefix)
diff --git a/Tests/RunCMake/GeneratorExpression/empty.c b/Tests/RunCMake/GeneratorExpression/empty.c
new file mode 100644
index 0000000..e69de29
-- 
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