Add includes and compile definitions with target_link_libraries.

This establishes that linking is used to propagate usage-requirements
between targets in CMake code. The use of the target_link_libraries
command as the API for this is chosen because introducing a new command
would introduce confusion due to multiple commands which differ only in
a subtle way.

6 files changed, 97 insertions, 30 deletions

diff --git a/Tests/ExportImport/Export/CMakeLists.txt b/Tests/ExportImport/Export/CMakeLists.txt
index ae44c28..ae938cd 100644
--- a/Tests/ExportImport/Export/CMakeLists.txt
+++ b/Tests/ExportImport/Export/CMakeLists.txt
@@ -90,23 +90,7 @@ set_property(TARGET testLibCycleA PROPERTY LINK_INTERFACE_MULTIPLICITY 3)
 # Test exporting dependent libraries into different exports
 add_library(testLibRequired testLibRequired.c)
 add_library(testLibDepends testLibDepends.c)
-set_property(TARGET testLibDepends APPEND PROPERTY
-  INCLUDE_DIRECTORIES
-    $<TARGET_PROPERTY:testLibRequired,INTERFACE_INCLUDE_DIRECTORIES>
-)
-set_property(TARGET testLibDepends APPEND PROPERTY
-  COMPILE_DEFINITIONS
-    $<TARGET_PROPERTY:testLibRequired,INTERFACE_COMPILE_DEFINITIONS>
-)
-set_property(TARGET testLibDepends APPEND PROPERTY
-  INTERFACE_INCLUDE_DIRECTORIES
-    $<TARGET_PROPERTY:testLibRequired,INTERFACE_INCLUDE_DIRECTORIES>
-)
-set_property(TARGET testLibDepends APPEND PROPERTY
-  INTERFACE_COMPILE_DEFINITIONS
-    $<TARGET_PROPERTY:testLibRequired,INTERFACE_COMPILE_DEFINITIONS>
-)
-target_link_libraries(testLibDepends testLibRequired)
+target_link_libraries(testLibDepends LINK_PUBLIC testLibRequired)
 
 macro(add_include_lib _libName)
   file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/${_libName}.c" "// no content\n")
@@ -239,6 +223,25 @@ install(EXPORT RequiredExp NAMESPACE Req:: FILE testLibRequiredTargets.cmake DES
 install(TARGETS testLibDepends testSharedLibDepends EXPORT DependsExp DESTINATION lib )
 install(EXPORT DependsExp FILE testLibDependsTargets.cmake DESTINATION lib/cmake/testLibDepends)
 
+file(WRITE
+  "${CMAKE_CURRENT_BINARY_DIR}/testLibRequiredConfig.cmake"
+  "
+if(\${CMAKE_FIND_PACKAGE_NAME}_FIND_VERSION VERSION_LESS 2.3 AND NOT \${CMAKE_FIND_PACKAGE_NAME}_INTERFACES)
+  set(\${CMAKE_FIND_PACKAGE_NAME}_NO_INTERFACES 1)
+endif()
+include(\"\${CMAKE_CURRENT_LIST_DIR}/testLibRequiredTargets.cmake\")
+set(\${CMAKE_FIND_PACKAGE_NAME}_INCLUDE_DIRS \"${CMAKE_CURRENT_BINARY_DIR}\" \"${CMAKE_CURRENT_SOURCE_DIR}\" )
+"
+)
+
+include(CMakePackageConfigHelpers)
+write_basic_package_version_file( testLibRequiredConfigVersion.cmake VERSION 2.5 COMPATIBILITY AnyNewerVersion)
+
+install(FILES
+  "${CMAKE_CURRENT_BINARY_DIR}/testLibRequiredConfig.cmake"
+  "${CMAKE_CURRENT_BINARY_DIR}/testLibRequiredConfigVersion.cmake"
+  DESTINATION lib/cmake/testLibRequired
+)
 
 # Install and export from install tree.
 install(
diff --git a/Tests/ExportImport/Import/A/CMakeLists.txt b/Tests/ExportImport/Import/A/CMakeLists.txt
index 0675594..0337130 100644
--- a/Tests/ExportImport/Import/A/CMakeLists.txt
+++ b/Tests/ExportImport/Import/A/CMakeLists.txt
@@ -159,18 +159,11 @@ endif()
 
 add_executable(deps_iface deps_iface.c)
 target_link_libraries(deps_iface testLibDepends)
-target_include_directories(deps_iface PRIVATE $<TARGET_PROPERTY:testLibDepends,INTERFACE_INCLUDE_DIRECTORIES>)
-target_compile_definitions(deps_iface PRIVATE $<TARGET_PROPERTY:testLibDepends,INTERFACE_COMPILE_DEFINITIONS>)
 
 add_executable(deps_shared_iface deps_shared_iface.cpp)
 target_link_libraries(deps_shared_iface testSharedLibDepends)
-target_include_directories(deps_shared_iface
-  PRIVATE
-    $<TARGET_PROPERTY:testSharedLibDepends,INTERFACE_INCLUDE_DIRECTORIES>
-)
 target_compile_definitions(deps_shared_iface
   PRIVATE
-    $<TARGET_PROPERTY:testSharedLibDepends,INTERFACE_COMPILE_DEFINITIONS>
     $<$<BOOL:$<TARGET_PROPERTY:POSITION_INDEPENDENT_CODE>>:PIC_PROPERTY_IS_ON>
     $<$<BOOL:$<TARGET_PROPERTY:CUSTOM_PROP>>:CUSTOM_PROPERTY_IS_ON>
     $<$<STREQUAL:$<TARGET_PROPERTY:CUSTOM_STRING>,testcontent>:CUSTOM_STRING_IS_MATCH>
@@ -200,13 +193,8 @@ endif()
 
 add_executable(deps_shared_iface2 deps_shared_iface.cpp)
 target_link_libraries(deps_shared_iface2 bld_testSharedLibDepends bld_subdirlib)
-target_include_directories(deps_shared_iface2
-  PRIVATE
-    $<TARGET_PROPERTY:bld_testSharedLibDepends,INTERFACE_INCLUDE_DIRECTORIES>
-    $<TARGET_PROPERTY:bld_subdirlib,INTERFACE_INCLUDE_DIRECTORIES>
-)
 target_compile_definitions(deps_shared_iface2
-  PRIVATE $<TARGET_PROPERTY:bld_testSharedLibDepends,INTERFACE_COMPILE_DEFINITIONS> TEST_SUBDIR_LIB
+  PRIVATE TEST_SUBDIR_LIB
   $<$<BOOL:$<TARGET_PROPERTY:POSITION_INDEPENDENT_CODE>>:PIC_PROPERTY_IS_ON>
   $<$<BOOL:$<TARGET_PROPERTY:CUSTOM_PROP>>:CUSTOM_PROPERTY_IS_ON>
   $<$<STREQUAL:$<TARGET_PROPERTY:CUSTOM_STRING>,testcontent>:CUSTOM_STRING_IS_MATCH>
diff --git a/Tests/ExportImport/Import/CMakeLists.txt b/Tests/ExportImport/Import/CMakeLists.txt
index 3fc78a2..237f8fa 100644
--- a/Tests/ExportImport/Import/CMakeLists.txt
+++ b/Tests/ExportImport/Import/CMakeLists.txt
@@ -17,3 +17,8 @@ add_executable(imp_testTransExe1 imp_testTransExe1.c)
 target_link_libraries(imp_testTransExe1 imp_lib1)
 add_executable(imp_testTransExe1b imp_testTransExe1.c)
 target_link_libraries(imp_testTransExe1b imp_lib1b)
+
+# Test package INTERFACE controls
+add_subdirectory(package_old_old)
+add_subdirectory(package_new_old)
+add_subdirectory(package_new_new)
diff --git a/Tests/ExportImport/Import/package_new_new/CMakeLists.txt b/Tests/ExportImport/Import/package_new_new/CMakeLists.txt
new file mode 100644
index 0000000..4e6f642
--- /dev/null
+++ b/Tests/ExportImport/Import/package_new_new/CMakeLists.txt
@@ -0,0 +1,23 @@
+
+cmake_minimum_required(VERSION 2.8)
+
+find_package(testLibRequired 2.5 REQUIRED)
+
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/main.cpp"
+  "
+#include \"testSharedLibRequired.h\"
+int main(int argc, char **argv)
+{
+  TestSharedLibRequired req;
+  return req.foo();
+}
+"
+)
+
+get_target_property(prop Req::testSharedLibRequired INTERFACE_INCLUDE_DIRECTORIES)
+if (NOT prop)
+  message(SEND_ERROR "Interface of Req::testSharedLibRequired should not be empty")
+endif()
+
+add_executable(new_new_test "${CMAKE_CURRENT_BINARY_DIR}/main.cpp")
+target_link_libraries(new_new_test Req::testSharedLibRequired)
diff --git a/Tests/ExportImport/Import/package_new_old/CMakeLists.txt b/Tests/ExportImport/Import/package_new_old/CMakeLists.txt
new file mode 100644
index 0000000..e675d64
--- /dev/null
+++ b/Tests/ExportImport/Import/package_new_old/CMakeLists.txt
@@ -0,0 +1,24 @@
+
+cmake_minimum_required(VERSION 2.8)
+
+find_package(testLibRequired 2.5 REQUIRED)
+
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/main.cpp"
+  "
+#include \"testSharedLibRequired.h\"
+int main(int argc, char **argv)
+{
+  TestSharedLibRequired req;
+  return req.foo();
+}
+"
+)
+
+get_target_property(prop Req::testSharedLibRequired INTERFACE_INCLUDE_DIRECTORIES)
+if ("${prop}" STREQUAL "")
+  message(SEND_ERROR "Interface of Req::testSharedLibRequired should not be empty")
+endif()
+
+add_executable(new_old_test "${CMAKE_CURRENT_BINARY_DIR}/main.cpp")
+target_link_libraries(new_old_test Req::testSharedLibRequired)
+include_directories(${testLibRequired_INCLUDE_DIRS})
diff --git a/Tests/ExportImport/Import/package_old_old/CMakeLists.txt b/Tests/ExportImport/Import/package_old_old/CMakeLists.txt
new file mode 100644
index 0000000..3b27330
--- /dev/null
+++ b/Tests/ExportImport/Import/package_old_old/CMakeLists.txt
@@ -0,0 +1,24 @@
+
+cmake_minimum_required(VERSION 2.8)
+
+find_package(testLibRequired 2.1 REQUIRED)
+
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/main.cpp"
+  "
+#include \"testSharedLibRequired.h\"
+int main(int argc, char **argv)
+{
+  TestSharedLibRequired req;
+  return req.foo();
+}
+"
+)
+
+get_target_property(prop Req::testSharedLibRequired INTERFACE_INCLUDE_DIRECTORIES)
+if (prop)
+  message(SEND_ERROR "Interface of Req::testSharedLibRequired should be empty, but is ${prop}")
+endif()
+
+add_executable(old_old_test "${CMAKE_CURRENT_BINARY_DIR}/main.cpp")
+target_link_libraries(old_old_test Req::testSharedLibRequired)
+include_directories(${testLibRequired_INCLUDE_DIRS})