Introduce the INTERFACE_LINK_LIBRARIES property.

This property replaces the properties which
match (IMPORTED_)?LINK_INTERFACE_LIBRARIES(_<CONFIG>)?, and is enabled
for IMPORTED targets, and for non-IMPORTED targets only with a policy.

For static libraries, the INTERFACE_LINK_LIBRARIES property is
also used as the source of transitive usage requirements content.
Static libraries still require users to link to all entries in
their LINK_LIBRARIES, but usage requirements such as INCLUDE_DIRECTORIES
COMPILE_DEFINITIONS and COMPILE_OPTIONS can be restricted to only
certain interface libraries.

Because the INTERFACE_LINK_LIBRARIES property is populated unconditionally,
we need to compare the evaluated result of it with the link implementation
to determine whether to issue the policy warning for static libraries. For
shared libraries, the policy warning is issued if the contents of
the INTERFACE_LINK_LIBRARIES property differs from the contents of the
relevant config-specific old LINK_INTERFACE_LIBRARIES property.

14 files changed, 69 insertions, 0 deletions

diff --git a/Tests/RunCMake/CMP0022/CMP0022-NOWARN-static-stderr.txt b/Tests/RunCMake/CMP0022/CMP0022-NOWARN-static-stderr.txt
new file mode 100644
index 0000000..10f3293
--- /dev/null
+++ b/Tests/RunCMake/CMP0022/CMP0022-NOWARN-static-stderr.txt
@@ -0,0 +1 @@
+^$
diff --git a/Tests/RunCMake/CMP0022/CMP0022-NOWARN-static.cmake b/Tests/RunCMake/CMP0022/CMP0022-NOWARN-static.cmake
new file mode 100644
index 0000000..3e4144f
--- /dev/null
+++ b/Tests/RunCMake/CMP0022/CMP0022-NOWARN-static.cmake
@@ -0,0 +1,8 @@
+
+project(CMP0022-NOWARN-static)
+
+add_library(foo STATIC empty_vs6_1.cpp)
+add_library(bar STATIC empty_vs6_2.cpp)
+add_library(bat STATIC empty_vs6_3.cpp)
+target_link_libraries(foo bar)
+target_link_libraries(bar bat)
diff --git a/Tests/RunCMake/CMP0022/CMP0022-WARN-static-result.txt b/Tests/RunCMake/CMP0022/CMP0022-WARN-static-result.txt
new file mode 100644
index 0000000..573541a
--- /dev/null
+++ b/Tests/RunCMake/CMP0022/CMP0022-WARN-static-result.txt
@@ -0,0 +1 @@
+0
diff --git a/Tests/RunCMake/CMP0022/CMP0022-WARN-static-stderr.txt b/Tests/RunCMake/CMP0022/CMP0022-WARN-static-stderr.txt
new file mode 100644
index 0000000..41d132c
--- /dev/null
+++ b/Tests/RunCMake/CMP0022/CMP0022-WARN-static-stderr.txt
@@ -0,0 +1,10 @@
+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.
+
+  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.
+This warning is for project developers.  Use -Wno-dev to suppress it.$
diff --git a/Tests/RunCMake/CMP0022/CMP0022-WARN-static.cmake b/Tests/RunCMake/CMP0022/CMP0022-WARN-static.cmake
new file mode 100644
index 0000000..b3cb131
--- /dev/null
+++ b/Tests/RunCMake/CMP0022/CMP0022-WARN-static.cmake
@@ -0,0 +1,11 @@
+
+project(CMP0022-WARN)
+
+add_library(foo STATIC empty_vs6_1.cpp)
+add_library(bar STATIC empty_vs6_2.cpp)
+add_library(bat STATIC empty_vs6_3.cpp)
+set_property(TARGET bar PROPERTY INTERFACE_LINK_LIBRARIES foo)
+set_property(TARGET bar PROPERTY LINK_LIBRARIES bat)
+
+add_library(user empty.cpp)
+target_link_libraries(user bar)
diff --git a/Tests/RunCMake/CMP0022/CMP0022-WARN-stderr.txt b/Tests/RunCMake/CMP0022/CMP0022-WARN-stderr.txt
new file mode 100644
index 0000000..29103c9
--- /dev/null
+++ b/Tests/RunCMake/CMP0022/CMP0022-WARN-stderr.txt
@@ -0,0 +1,8 @@
+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.
+This warning is for project developers.  Use -Wno-dev to suppress it.$
diff --git a/Tests/RunCMake/CMP0022/CMP0022-WARN.cmake b/Tests/RunCMake/CMP0022/CMP0022-WARN.cmake
new file mode 100644
index 0000000..24b7f45
--- /dev/null
+++ b/Tests/RunCMake/CMP0022/CMP0022-WARN.cmake
@@ -0,0 +1,11 @@
+
+project(CMP0022-WARN)
+
+add_library(foo SHARED empty_vs6_1.cpp)
+add_library(bar SHARED empty_vs6_2.cpp)
+add_library(bat SHARED empty_vs6_3.cpp)
+set_property(TARGET bar PROPERTY INTERFACE_LINK_LIBRARIES foo)
+set_property(TARGET bar PROPERTY LINK_INTERFACE_LIBRARIES bat)
+
+add_library(user empty.cpp)
+target_link_libraries(user bar)
diff --git a/Tests/RunCMake/CMP0022/CMakeLists.txt b/Tests/RunCMake/CMP0022/CMakeLists.txt
new file mode 100644
index 0000000..72abfc8
--- /dev/null
+++ b/Tests/RunCMake/CMP0022/CMakeLists.txt
@@ -0,0 +1,3 @@
+cmake_minimum_required(VERSION 2.8.11)
+project(${RunCMake_TEST} NONE)
+include(${RunCMake_TEST}.cmake)
diff --git a/Tests/RunCMake/CMP0022/RunCMakeTest.cmake b/Tests/RunCMake/CMP0022/RunCMakeTest.cmake
new file mode 100644
index 0000000..2e74f17
--- /dev/null
+++ b/Tests/RunCMake/CMP0022/RunCMakeTest.cmake
@@ -0,0 +1,5 @@
+include(RunCMake)
+
+run_cmake(CMP0022-WARN)
+run_cmake(CMP0022-WARN-static)
+run_cmake(CMP0022-NOWARN-static)
diff --git a/Tests/RunCMake/CMP0022/empty.cpp b/Tests/RunCMake/CMP0022/empty.cpp
new file mode 100644
index 0000000..bfbbdde
--- /dev/null
+++ b/Tests/RunCMake/CMP0022/empty.cpp
@@ -0,0 +1,7 @@
+#ifdef _WIN32
+__declspec(dllexport)
+#endif
+int empty()
+{
+  return 0;
+}
diff --git a/Tests/RunCMake/CMP0022/empty_vs6_1.cpp b/Tests/RunCMake/CMP0022/empty_vs6_1.cpp
new file mode 100644
index 0000000..7efedab
--- /dev/null
+++ b/Tests/RunCMake/CMP0022/empty_vs6_1.cpp
@@ -0,0 +1 @@
+#include "empty.cpp"
diff --git a/Tests/RunCMake/CMP0022/empty_vs6_2.cpp b/Tests/RunCMake/CMP0022/empty_vs6_2.cpp
new file mode 100644
index 0000000..7efedab
--- /dev/null
+++ b/Tests/RunCMake/CMP0022/empty_vs6_2.cpp
@@ -0,0 +1 @@
+#include "empty.cpp"
diff --git a/Tests/RunCMake/CMP0022/empty_vs6_3.cpp b/Tests/RunCMake/CMP0022/empty_vs6_3.cpp
new file mode 100644
index 0000000..7efedab
--- /dev/null
+++ b/Tests/RunCMake/CMP0022/empty_vs6_3.cpp
@@ -0,0 +1 @@
+#include "empty.cpp"
diff --git a/Tests/RunCMake/CMakeLists.txt b/Tests/RunCMake/CMakeLists.txt
index c1a08d2..e07c42f 100644
--- a/Tests/RunCMake/CMakeLists.txt
+++ b/Tests/RunCMake/CMakeLists.txt
@@ -52,6 +52,7 @@ if(XCODE_VERSION AND "${XCODE_VERSION}" VERSION_LESS 3)
 endif()
 
 add_RunCMake_test(CMP0019)
+add_RunCMake_test(CMP0022)
 add_RunCMake_test(CTest)
 if(UNIX AND "${CMAKE_TEST_GENERATOR}" MATCHES "Unix Makefiles")
   add_RunCMake_test(CompilerChange)