Merge topic 'policy-CMP0022-fixes-for-master'

b51696f CMP0022: Update target_link_libraries plain signature documentation
25b7f87 Merge branch 'policy-CMP0022-fixes' into policy-CMP0022-fixes-for-master
0a561a0 CMP0022: Warn about a given target at most once
23d21b7 Do not export INTERFACE_LINK_LIBRARIES from non-linkable targets
ef10b87 CMP0022: Plain target_link_libraries must populate link interface
0e06788 CMP0022: Add test for target_link_libraries plain signature
c0f4a61 CMP0022: Add unit test for null pointer check and message.
4b0cfa7 Merge branch 'output-CMP0022-entries' into policy-CMP0022-fixes

19 files changed, 106 insertions, 12 deletions

diff --git a/Tests/CMakeCommands/target_link_libraries/cmp0022/CMakeLists.txt b/Tests/CMakeCommands/target_link_libraries/cmp0022/CMakeLists.txt
index 33757b66ea..818b8c99c1 100644
--- a/Tests/CMakeCommands/target_link_libraries/cmp0022/CMakeLists.txt
+++ b/Tests/CMakeCommands/target_link_libraries/cmp0022/CMakeLists.txt
@@ -28,3 +28,10 @@ endif()
 
 add_executable(staticlib_exe staticlib_exe.cpp)
 target_link_libraries(staticlib_exe staticlib1)
+
+add_library(onlyplainlib1 SHARED onlyplainlib1.cpp)
+add_library(onlyplainlib2 SHARED onlyplainlib2.cpp)
+target_link_libraries(onlyplainlib2 onlyplainlib1)
+
+add_executable(onlyplainlib_user onlyplainlib_user.cpp)
+target_link_libraries(onlyplainlib_user onlyplainlib2)
diff --git a/Tests/CMakeCommands/target_link_libraries/cmp0022/onlyplainlib1.cpp b/Tests/CMakeCommands/target_link_libraries/cmp0022/onlyplainlib1.cpp
new file mode 100644
index 0000000000..41dc3ce18d
--- /dev/null
+++ b/Tests/CMakeCommands/target_link_libraries/cmp0022/onlyplainlib1.cpp
@@ -0,0 +1,13 @@
+
+#include "onlyplainlib1.h"
+
+OnlyPlainLib1::OnlyPlainLib1()
+  : result(0)
+{
+
+}
+
+int OnlyPlainLib1::GetResult()
+{
+  return result;
+}
diff --git a/Tests/CMakeCommands/target_link_libraries/cmp0022/onlyplainlib1.h b/Tests/CMakeCommands/target_link_libraries/cmp0022/onlyplainlib1.h
new file mode 100644
index 0000000000..c0373ceb3b
--- /dev/null
+++ b/Tests/CMakeCommands/target_link_libraries/cmp0022/onlyplainlib1.h
@@ -0,0 +1,14 @@
+
+struct
+#ifdef _WIN32
+__declspec(dllexport)
+#endif
+OnlyPlainLib1
+{
+  OnlyPlainLib1();
+
+  int GetResult();
+
+private:
+  int result;
+};
diff --git a/Tests/CMakeCommands/target_link_libraries/cmp0022/onlyplainlib2.cpp b/Tests/CMakeCommands/target_link_libraries/cmp0022/onlyplainlib2.cpp
new file mode 100644
index 0000000000..2865ae91a6
--- /dev/null
+++ b/Tests/CMakeCommands/target_link_libraries/cmp0022/onlyplainlib2.cpp
@@ -0,0 +1,8 @@
+
+#include "onlyplainlib2.h"
+
+OnlyPlainLib1 onlyPlainLib2()
+{
+  OnlyPlainLib1 opl1;
+  return opl1;
+}
diff --git a/Tests/CMakeCommands/target_link_libraries/cmp0022/onlyplainlib2.h b/Tests/CMakeCommands/target_link_libraries/cmp0022/onlyplainlib2.h
new file mode 100644
index 0000000000..74b18a00ef
--- /dev/null
+++ b/Tests/CMakeCommands/target_link_libraries/cmp0022/onlyplainlib2.h
@@ -0,0 +1,7 @@
+
+#include "onlyplainlib1.h"
+
+#ifdef _WIN32
+__declspec(dllexport)
+#endif
+OnlyPlainLib1 onlyPlainLib2();
diff --git a/Tests/CMakeCommands/target_link_libraries/cmp0022/onlyplainlib_user.cpp b/Tests/CMakeCommands/target_link_libraries/cmp0022/onlyplainlib_user.cpp
new file mode 100644
index 0000000000..0fb7b0a67b
--- /dev/null
+++ b/Tests/CMakeCommands/target_link_libraries/cmp0022/onlyplainlib_user.cpp
@@ -0,0 +1,7 @@
+
+#include "onlyplainlib2.h"
+
+int main(int argc, char **argv)
+{
+  return onlyPlainLib2().GetResult();
+}
diff --git a/Tests/RunCMake/CMP0022/CMP0022-NOWARN-exe-stderr.txt b/Tests/RunCMake/CMP0022/CMP0022-NOWARN-exe-stderr.txt
new file mode 100644
index 0000000000..10f32932ee
--- /dev/null
+++ b/Tests/RunCMake/CMP0022/CMP0022-NOWARN-exe-stderr.txt
@@ -0,0 +1 @@
+^$
diff --git a/Tests/RunCMake/CMP0022/CMP0022-NOWARN-exe.cmake b/Tests/RunCMake/CMP0022/CMP0022-NOWARN-exe.cmake
new file mode 100644
index 0000000000..b0268c8428
--- /dev/null
+++ b/Tests/RunCMake/CMP0022/CMP0022-NOWARN-exe.cmake
@@ -0,0 +1,7 @@
+enable_language(CXX)
+
+add_library(testLib empty_vs6_1.cpp)
+add_executable(testExe empty_vs6_2.cpp)
+target_link_libraries(testExe testLib)
+
+export(TARGETS testExe FILE "${CMAKE_CURRENT_BINARY_DIR}/cmp0022NOWARN-exe.cmake")
diff --git a/Tests/RunCMake/CMP0022/CMP0022-NOWARN-shared-stderr.txt b/Tests/RunCMake/CMP0022/CMP0022-NOWARN-shared-stderr.txt
new file mode 100644
index 0000000000..10f32932ee
--- /dev/null
+++ b/Tests/RunCMake/CMP0022/CMP0022-NOWARN-shared-stderr.txt
@@ -0,0 +1 @@
+^$
diff --git a/Tests/RunCMake/CMP0022/CMP0022-NOWARN-shared.cmake b/Tests/RunCMake/CMP0022/CMP0022-NOWARN-shared.cmake
new file mode 100644
index 0000000000..57c3ed0d7c
--- /dev/null
+++ b/Tests/RunCMake/CMP0022/CMP0022-NOWARN-shared.cmake
@@ -0,0 +1,8 @@
+enable_language(CXX)
+
+add_library(foo SHARED empty_vs6_1.cpp)
+add_library(bar SHARED empty_vs6_2.cpp)
+target_link_libraries(bar foo)
+
+add_executable(zot empty.cpp)
+target_link_libraries(zot bar)
diff --git a/Tests/RunCMake/CMP0022/CMP0022-WARN-empty-old-stderr.txt b/Tests/RunCMake/CMP0022/CMP0022-WARN-empty-old-stderr.txt
index 6d519f037e..6a6a0c782c 100644
--- a/Tests/RunCMake/CMP0022/CMP0022-WARN-empty-old-stderr.txt
+++ b/Tests/RunCMake/CMP0022/CMP0022-WARN-empty-old-stderr.txt
@@ -3,14 +3,16 @@ CMake Warning \(dev\) in CMakeLists.txt:
   interface.  Run "cmake --help-policy CMP0022" for policy details.  Use the
   cmake_policy command to set the policy and suppress this warning.
 
-  Target "bar" has a INTERFACE_LINK_LIBRARIES property which differs from its
-  LINK_INTERFACE_LIBRARIES properties.
+  Target "bar" has an INTERFACE_LINK_LIBRARIES property.  This should be
+  preferred as the source of the link interface for this library but because
+  CMP0022 is not set CMake is ignoring the property and using the link
+  implementation as the link interface instead.
 
   INTERFACE_LINK_LIBRARIES:
 
     foo
 
-  LINK_INTERFACE_LIBRARIES:
+  Link implementation:
 
     \(empty\)
 
diff --git a/Tests/RunCMake/CMP0022/CMP0022-WARN-static-stderr.txt b/Tests/RunCMake/CMP0022/CMP0022-WARN-static-stderr.txt
index e41133aa12..1370c5ebe7 100644
--- a/Tests/RunCMake/CMP0022/CMP0022-WARN-static-stderr.txt
+++ b/Tests/RunCMake/CMP0022/CMP0022-WARN-static-stderr.txt
@@ -3,10 +3,10 @@ CMake Warning \(dev\) in CMakeLists.txt:
   interface.  Run "cmake --help-policy CMP0022" for policy details.  Use the
   cmake_policy command to set the policy and suppress this warning.
 
-  Static library target "bar" has a INTERFACE_LINK_LIBRARIES property.  This
-  should be preferred as the source of the link interface for this library.
-  Ignoring the property and using the link implementation as the link
-  interface instead.
+  Target "bar" has an INTERFACE_LINK_LIBRARIES property.  This should be
+  preferred as the source of the link interface for this library but because
+  CMP0022 is not set CMake is ignoring the property and using the link
+  implementation as the link interface instead.
 
   INTERFACE_LINK_LIBRARIES:
 
diff --git a/Tests/RunCMake/CMP0022/CMP0022-WARN-stderr.txt b/Tests/RunCMake/CMP0022/CMP0022-WARN-stderr.txt
index 93c0ab327c..2f7dfbfb7f 100644
--- a/Tests/RunCMake/CMP0022/CMP0022-WARN-stderr.txt
+++ b/Tests/RunCMake/CMP0022/CMP0022-WARN-stderr.txt
@@ -1,10 +1,10 @@
-CMake Warning \(dev\) in CMakeLists.txt:
+^CMake Warning \(dev\) in CMakeLists.txt:
   Policy CMP0022 is not set: INTERFACE_LINK_LIBRARIES defines the link
   interface.  Run "cmake --help-policy CMP0022" for policy details.  Use the
   cmake_policy command to set the policy and suppress this warning.
 
-  Target "bar" has a INTERFACE_LINK_LIBRARIES property which differs from its
-  LINK_INTERFACE_LIBRARIES properties.
+  Target "bar" has an INTERFACE_LINK_LIBRARIES property which differs from
+  its LINK_INTERFACE_LIBRARIES properties.
 
   INTERFACE_LINK_LIBRARIES:
 
diff --git a/Tests/RunCMake/CMP0022/CMP0022-WARN-tll-stderr.txt b/Tests/RunCMake/CMP0022/CMP0022-WARN-tll-stderr.txt
index 6370b24750..f6722853a5 100644
--- a/Tests/RunCMake/CMP0022/CMP0022-WARN-tll-stderr.txt
+++ b/Tests/RunCMake/CMP0022/CMP0022-WARN-tll-stderr.txt
@@ -3,8 +3,8 @@ CMake Warning \(dev\) in CMakeLists.txt:
   interface.  Run "cmake --help-policy CMP0022" for policy details.  Use the
   cmake_policy command to set the policy and suppress this warning.
 
-  Target "bar" has a INTERFACE_LINK_LIBRARIES property which differs from its
-  LINK_INTERFACE_LIBRARIES properties.
+  Target "bar" has an INTERFACE_LINK_LIBRARIES property which differs from
+  its LINK_INTERFACE_LIBRARIES properties.
 
   INTERFACE_LINK_LIBRARIES:
 
diff --git a/Tests/RunCMake/CMP0022/CMP0022-WARN.cmake b/Tests/RunCMake/CMP0022/CMP0022-WARN.cmake
index 24b7f45768..fe7e858b7a 100644
--- a/Tests/RunCMake/CMP0022/CMP0022-WARN.cmake
+++ b/Tests/RunCMake/CMP0022/CMP0022-WARN.cmake
@@ -9,3 +9,8 @@ set_property(TARGET bar PROPERTY LINK_INTERFACE_LIBRARIES bat)
 
 add_library(user empty.cpp)
 target_link_libraries(user bar)
+
+# Use "bar" again with a different "head" target to check
+# that the warning does not appear again.
+add_library(user2 empty_vs6_3.cpp)
+target_link_libraries(user2 bar)
diff --git a/Tests/RunCMake/CMP0022/CMP0022-export-exe-stderr.txt b/Tests/RunCMake/CMP0022/CMP0022-export-exe-stderr.txt
new file mode 100644
index 0000000000..10f32932ee
--- /dev/null
+++ b/Tests/RunCMake/CMP0022/CMP0022-export-exe-stderr.txt
@@ -0,0 +1 @@
+^$
diff --git a/Tests/RunCMake/CMP0022/CMP0022-export-exe.cmake b/Tests/RunCMake/CMP0022/CMP0022-export-exe.cmake
new file mode 100644
index 0000000000..d832faceb5
--- /dev/null
+++ b/Tests/RunCMake/CMP0022/CMP0022-export-exe.cmake
@@ -0,0 +1,9 @@
+enable_language(CXX)
+
+cmake_policy(SET CMP0022 NEW)
+
+add_library(testLib empty_vs6_1.cpp)
+add_executable(testExe empty_vs6_2.cpp)
+target_link_libraries(testExe testLib)
+
+export(TARGETS testExe FILE "${CMAKE_CURRENT_BINARY_DIR}/cmp0022NEW-exe.cmake")
diff --git a/Tests/RunCMake/CMP0022/RunCMakeTest.cmake b/Tests/RunCMake/CMP0022/RunCMakeTest.cmake
index 8e5824aeaa..2781d20940 100644
--- a/Tests/RunCMake/CMP0022/RunCMakeTest.cmake
+++ b/Tests/RunCMake/CMP0022/RunCMakeTest.cmake
@@ -4,7 +4,10 @@ run_cmake(CMP0022-WARN)
 run_cmake(CMP0022-WARN-tll)
 run_cmake(CMP0022-WARN-static)
 run_cmake(CMP0022-WARN-empty-old)
+run_cmake(CMP0022-NOWARN-exe)
+run_cmake(CMP0022-NOWARN-shared)
 run_cmake(CMP0022-NOWARN-static)
 run_cmake(CMP0022-NOWARN-static-link_libraries)
 run_cmake(CMP0022-export)
+run_cmake(CMP0022-export-exe)
 run_cmake(CMP0022-install-export)
diff --git a/Tests/RunCMake/CMP0022/empty_vs6_4.cpp b/Tests/RunCMake/CMP0022/empty_vs6_4.cpp
new file mode 100644
index 0000000000..7efedabfa3
--- /dev/null
+++ b/Tests/RunCMake/CMP0022/empty_vs6_4.cpp
@@ -0,0 +1 @@
+#include "empty.cpp"