Export: Generate INTERFACE_LINK_LIBRARIES property on targets.

This property is generated only for targets which have recorded
policy CMP0022 as NEW, and a compatibility mode is added to
additionally export the old interfaces in that case too.

If the old interfaces are not exported, the generated export files
require CMake 2.8.12. Because the unit tests use a version which
is not yet called 2.8.12, temporarily require a lower version.

5 files changed, 42 insertions, 0 deletions

diff --git a/Tests/ExportImport/Export/CMakeLists.txt b/Tests/ExportImport/Export/CMakeLists.txt
index efecd03..da15d62 100644
--- a/Tests/ExportImport/Export/CMakeLists.txt
+++ b/Tests/ExportImport/Export/CMakeLists.txt
@@ -232,6 +232,33 @@ target_link_libraries(testSharedLibDepends LINK_PUBLIC renamed_on_export)
 target_link_libraries(testSharedLibDepends LINK_INTERFACE_LIBRARIES
   $<$<STREQUAL:$<TARGET_PROPERTY:TYPE>,EXECUTABLE>:$<TARGET_NAME:testSharedLibRequired>>)
 
+add_library(cmp0022OLD SHARED cmp0022_vs6_1.cpp)
+generate_export_header(cmp0022OLD BASE_NAME cmp0022)
+target_include_directories(cmp0022OLD PUBLIC
+  "$<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR};${CMAKE_CURRENT_SOURCE_DIR}>"
+  "$<INSTALL_INTERFACE:$<INSTALL_PREFIX>/include/cmp0022>"
+)
+cmake_policy(SET CMP0022 NEW)
+add_library(cmp0022NEW SHARED cmp0022_vs6_1.cpp)
+target_include_directories(cmp0022NEW PUBLIC
+  "$<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR};${CMAKE_CURRENT_SOURCE_DIR}>"
+  "$<INSTALL_INTERFACE:$<INSTALL_PREFIX>/include/cmp0022>"
+)
+cmake_policy(SET CMP0022 OLD)
+install(FILES
+  "${CMAKE_CURRENT_SOURCE_DIR}/cmp0022.h"
+  "${CMAKE_CURRENT_BINARY_DIR}/cmp0022_export.h"
+    DESTINATION include/cmp0022
+)
+
+set_property(TARGET testLib2 APPEND PROPERTY INTERFACE_COMPILE_DEFINITIONS USING_TESTLIB2)
+set_property(TARGET testLib3 APPEND PROPERTY INTERFACE_COMPILE_DEFINITIONS USING_TESTLIB3)
+
+set_property(TARGET cmp0022NEW APPEND PROPERTY INTERFACE_LINK_LIBRARIES testLib2)
+# set_property(TARGET cmp0022NEW APPEND PROPERTY LINK_INTERFACE_LIBRARIES testLibIncludeRequired2) # TODO: Test for error
+set_property(TARGET cmp0022OLD APPEND PROPERTY INTERFACE_LINK_LIBRARIES testLib2)
+set_property(TARGET cmp0022OLD APPEND PROPERTY LINK_INTERFACE_LIBRARIES testLib3)
+
 install(TARGETS testLibRequired
                 testLibIncludeRequired1
                 testLibIncludeRequired2
@@ -273,6 +300,7 @@ install(
   testExe2lib testLib4lib testLib4libdbg testLib4libopt
   testLib6
   testLibCycleA testLibCycleB
+  cmp0022NEW cmp0022OLD
   EXPORT exp
   RUNTIME DESTINATION bin
   LIBRARY DESTINATION lib NAMELINK_SKIP
@@ -316,6 +344,7 @@ add_subdirectory(sublib) # For CMAKE_INCLUDE_CURRENT_DIR_IN_INTERFACE test.
 export(TARGETS testExe1 testLib1 testLib2 testLib3
   testExe2libImp testLib3Imp testLib3ImpDep subdirlib
   testSharedLibRequired testSharedLibDepends renamed_on_export
+  cmp0022NEW cmp0022OLD
   NAMESPACE bld_
   FILE ExportBuildTree.cmake
   )
diff --git a/Tests/ExportImport/Export/cmp0022.cpp b/Tests/ExportImport/Export/cmp0022.cpp
new file mode 100644
index 0000000..bef8e61
--- /dev/null
+++ b/Tests/ExportImport/Export/cmp0022.cpp
@@ -0,0 +1,7 @@
+
+#include "cmp0022.h"
+
+int cmp0022()
+{
+  return 0;
+}
diff --git a/Tests/ExportImport/Export/cmp0022.h b/Tests/ExportImport/Export/cmp0022.h
new file mode 100644
index 0000000..32bf71a
--- /dev/null
+++ b/Tests/ExportImport/Export/cmp0022.h
@@ -0,0 +1,4 @@
+
+#include "cmp0022_export.h"
+
+int CMP0022_EXPORT cmp0022();
diff --git a/Tests/ExportImport/Export/cmp0022_vs6_1.cpp b/Tests/ExportImport/Export/cmp0022_vs6_1.cpp
new file mode 100644
index 0000000..a6ec838
--- /dev/null
+++ b/Tests/ExportImport/Export/cmp0022_vs6_1.cpp
@@ -0,0 +1 @@
+#include "cmp0022.cpp"
diff --git a/Tests/ExportImport/Export/cmp0022_vs6_2.cpp b/Tests/ExportImport/Export/cmp0022_vs6_2.cpp
new file mode 100644
index 0000000..a6ec838
--- /dev/null
+++ b/Tests/ExportImport/Export/cmp0022_vs6_2.cpp
@@ -0,0 +1 @@
+#include "cmp0022.cpp"