GenEx/LINK_LIBRARY: Add features for framework support on Apple

Help/release/dev/Apple-link-framework.rst

@@ -0,0 +1,11 @@
+Apple-link-framework
+--------------------
+
+* The :genex:`LINK_LIBRARY` generator expression gained the ability to link
+  frameworks in various ways when targeting ``Apple`` platforms. The following
+  new features were added:
+
+  * ``FRAMEWORK``
+  * ``NEEDED_FRAMEWORK``
+  * ``REEXPORT_FRAMEWORK``
+  * ``WEAK_FRAMEWORK``

Help/variable/LINK_LIBRARY_PREDEFINED_FEATURES.txt

@@ -3,3 +3,43 @@
 * ``DEFAULT``: This feature enables default link expression. This is mainly
   useful with :prop_tgt:`LINK_LIBRARY_OVERRIDE` and
   :prop_tgt:`LINK_LIBRARY_OVERRIDE_<LIBRARY>` target properties.
+
+**Features available in Apple environments**
+
+It is assumed that the linker used is the one provided by `XCode` or is
+compatible with it.
+
+* ``FRAMEWORK``: This option tells the linker to search for the specified
+  framework (use linker option ``-framework``).
+* ``NEEDED_FRAMEWORK``: This is the same as the ``FRAMEWORK`` feature but means
+  to really link with the framework even if no symbols are used from it (use
+  linker option ``-needed_framework``).
+* ``REEXPORT_FRAMEWORK``: This is the same as the ``FRAMEWORK`` feature but
+  also specifies that all symbols in that framework should be available to
+  clients linking to the library being created (use linker option
+  ``-reexport_framework``).
+* ``WEAK_FRAMEWORK``: This is the same as the ``FRAMEWORK`` feature but forces
+  the framework and all references to it to be marked as weak imports (use
+  linker option ``-weak_framework``).
+
+Features for framework linking have a special handling in ``CMake``: the
+framework can be specified as a ``CMake`` framework target or file path. In
+the later case, if the path includes a directory part, this one will be
+specified as framework search path at link step.
+
+.. code-block:: cmake
+
+  add_library(lib SHARED ...)
+  target_link_libraries(lib PRIVATE "$<LINK_LIBRARY:NEEDED_FRAMEWORK,/path/to/my_framework>")
+
+  # at link step we will have:
+  # -F/path/to -needed_framework my_framework
+
+.. note::
+
+   The expected formats for the file path, with optional parts specified as
+   ``()?``, are:
+
+   * (/path/to/)?FwName(.framework)?
+   * (/path/to/)?FwName.framework/FwName
+   * (/path/to/)?FwName.framework/Versions/\*/FwName

Modules/Compiler/Clang-CUDA.cmake

@@ -38,3 +38,18 @@ set(CMAKE_CUDA_RUNTIME_LIBRARY_LINK_OPTIONS_NONE   "")
 if(UNIX)
   list(APPEND CMAKE_CUDA_RUNTIME_LIBRARY_LINK_OPTIONS_STATIC "rt" "pthread" "dl")
 endif()
+
+if(APPLE)
+  # Defines host link features for frameworks
+  set(CMAKE_CUDA_LINK_USING_FRAMEWORK "LINKER:-framework,<LIBRARY>")
+  set(CMAKE_CUDA_LINK_USING_FRAMEWORK_SUPPORTED TRUE)
+
+  set(CMAKE_CUDA_LINK_USING_NEEDED_FRAMEWORK "LINKER:-needed_framework,<LIBRARY>")
+  set(CMAKE_CUDA_LINK_USING_NEEDED_FRAMEWORK_SUPPORTED TRUE)
+
+  set(CMAKE_CUDA_LINK_USING_REEXPORT_FRAMEWORK "LINKER:-reexport_framework,<LIBRARY>")
+  set(CMAKE_CUDA_LINK_USING_REEXPORT_FRAMEWORK_SUPPORTED TRUE)
+
+  set(CMAKE_CUDA_LINK_USING_WEAK_FRAMEWORK "LINKER:-weak_framework,<LIBRARY>")
+  set(CMAKE_CUDA_LINK_USING_WEAK_FRAMEWORK_SUPPORTED TRUE)
+endif()

Modules/Platform/Apple-Apple-Swift.cmake

@@ -1 +1,15 @@
 set(CMAKE_Swift_SYSROOT_FLAG "-sdk")
+
+
+# Defines host link features for frameworks
+set(CMAKE_Swift_LINK_USING_FRAMEWORK "LINKER:-framework,<LIBRARY>")
+set(CMAKE_Swift_LINK_USING_FRAMEWORK_SUPPORTED TRUE)
+
+set(CMAKE_Swift_LINK_USING_NEEDED_FRAMEWORK "LINKER:-needed_framework,<LIBRARY>")
+set(CMAKE_Swift_LINK_USING_NEEDED_FRAMEWORK_SUPPORTED TRUE)
+
+set(CMAKE_Swift_LINK_USING_REEXPORT_FRAMEWORK "LINKER:-reexport_framework,<LIBRARY>")
+set(CMAKE_Swift_LINK_USING_REEXPORT_FRAMEWORK_SUPPORTED TRUE)
+
+set(CMAKE_Swift_LINK_USING_WEAK_FRAMEWORK "LINKER:-weak_framework,<LIBRARY>")
+set(CMAKE_Swift_LINK_USING_WEAK_FRAMEWORK_SUPPORTED TRUE)

Modules/Platform/Apple-NVIDIA-CUDA.cmake

@@ -17,3 +17,17 @@ set(CMAKE_SHARED_MODULE_CREATE_CUDA_FLAGS "-shared -Wl,-headerpad_max_install_na
 
 set(CMAKE_CUDA_CREATE_SHARED_LIBRARY "<CMAKE_CUDA_HOST_LINK_LAUNCHER> <CMAKE_SHARED_LIBRARY_CUDA_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CUDA_FLAGS> -o <TARGET> <SONAME_FLAG> <TARGET_INSTALLNAME_DIR><TARGET_SONAME> <OBJECTS> <LINK_LIBRARIES>${__IMPLICIT_LINKS}")
 set(CMAKE_CUDA_CREATE_SHARED_MODULE "<CMAKE_CUDA_HOST_LINK_LAUNCHER> <CMAKE_SHARED_LIBRARY_CUDA_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CUDA_FLAGS> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>${__IMPLICIT_LINKS}")
+
+
+# Defines host link features for frameworks
+set(CMAKE_CUDA_LINK_USING_FRAMEWORK "LINKER:-framework,<LIBRARY>")
+set(CMAKE_CUDA_LINK_USING_FRAMEWORK_SUPPORTED TRUE)
+
+set(CMAKE_CUDA_LINK_USING_NEEDED_FRAMEWORK "LINKER:-needed_framework,<LIBRARY>")
+set(CMAKE_CUDA_LINK_USING_NEEDED_FRAMEWORK_SUPPORTED TRUE)
+
+set(CMAKE_CUDA_LINK_USING_REEXPORT_FRAMEWORK "LINKER:-reexport_framework,<LIBRARY>")
+set(CMAKE_CUDA_LINK_USING_REEXPORT_FRAMEWORK_SUPPORTED TRUE)
+
+set(CMAKE_CUDA_LINK_USING_WEAK_FRAMEWORK "LINKER:-weak_framework,<LIBRARY>")
+set(CMAKE_CUDA_LINK_USING_WEAK_FRAMEWORK_SUPPORTED TRUE)

Modules/Platform/Darwin.cmake

@@ -106,6 +106,19 @@ foreach(lang C CXX Fortran OBJC OBJCXX)
   # Set default framework search path flag for languages known to use a
   # preprocessor that may find headers in frameworks.
   set(CMAKE_${lang}_FRAMEWORK_SEARCH_FLAG -F)
+
+  # Defines link features for frameworks
+  set(CMAKE_${lang}_LINK_USING_FRAMEWORK "LINKER:-framework,<LIBRARY>")
+  set(CMAKE_${lang}_LINK_USING_FRAMEWORK_SUPPORTED TRUE)
+
+  set(CMAKE_${lang}_LINK_USING_NEEDED_FRAMEWORK "LINKER:-needed_framework,<LIBRARY>")
+  set(CMAKE_${lang}_LINK_USING_NEEDED_FRAMEWORK_SUPPORTED TRUE)
+
+  set(CMAKE_${lang}_LINK_USING_REEXPORT_FRAMEWORK "LINKER:-reexport_framework,<LIBRARY>")
+  set(CMAKE_${lang}_LINK_USING_REEXPORT_FRAMEWORK_SUPPORTED TRUE)
+
+  set(CMAKE_${lang}_LINK_USING_WEAK_FRAMEWORK "LINKER:-weak_framework,<LIBRARY>")
+  set(CMAKE_${lang}_LINK_USING_WEAK_FRAMEWORK_SUPPORTED TRUE)
 endforeach()
 
 # default to searching for frameworks first

Source/cmComputeLinkInformation.cxx

@@ -10,6 +10,7 @@
 #include <cm/memory>
 #include <cm/optional>
 #include <cmext/algorithm>
+#include <cmext/string_view>
 
 #include "cmComputeLinkDepends.h"
 #include "cmGeneratorTarget.h"
@@ -19,7 +20,6 @@
 #include "cmMakefile.h"
 #include "cmMessageType.h"
 #include "cmOrderDirectories.h"
-#include "cmOutputConverter.h"
 #include "cmPlaceholderExpander.h"
 #include "cmPolicies.h"
 #include "cmState.h"
@@ -1045,12 +1045,14 @@ void cmComputeLinkInformation::AddItem(LinkEntry const& entry)
     }
   } else {
     // This is not a CMake target.  Use the name given.
-    if (cmSystemTools::FileIsFullPath(item.Value)) {
-      if (cmSystemTools::IsPathToFramework(item.Value) &&
-          this->Makefile->IsOn("APPLE")) {
-        // This is a framework.
-        this->AddFrameworkItem(entry);
-      } else if (cmSystemTools::FileIsDirectory(item.Value)) {
+    if (cmHasSuffix(entry.Feature, "FRAMEWORK"_s) ||
+        (entry.Feature == DEFAULT &&
+         cmSystemTools::IsPathToFramework(item.Value) &&
+         this->Makefile->IsOn("APPLE"))) {
+      // This is a framework.
+      this->AddFrameworkItem(entry);
+    } else if (cmSystemTools::FileIsFullPath(item.Value)) {
+      if (cmSystemTools::FileIsDirectory(item.Value)) {
         // This is a directory.
         this->DropDirectoryItem(item);
       } else {
@@ -1425,11 +1427,41 @@ void cmComputeLinkInformation::AddTargetItem(LinkEntry const& entry)
     this->OldLinkDirItems.push_back(item.Value);
   }
 
-  // Now add the full path to the library.
-  this->Items.emplace_back(item, ItemIsPath::Yes, target,
-                           this->FindLibraryFeature(entry.Feature == DEFAULT
-                                                      ? "__CMAKE_LINK_LIBRARY"
-                                                      : entry.Feature));
+  if (target->IsFrameworkOnApple() && this->GlobalGenerator->IsXcode() &&
+      entry.Feature == DEFAULT) {
+    // ensure FRAMEWORK feature is loaded
+    this->AddLibraryFeature("FRAMEWORK");
+  }
+
+  if (cmHasSuffix(entry.Feature, "FRAMEWORK"_s) &&
+      target->IsFrameworkOnApple() && !this->GlobalGenerator->IsXcode()) {
+    // Add the framework directory and the framework item itself
+    auto fwItems = this->GlobalGenerator->SplitFrameworkPath(item.Value, true);
+    if (!fwItems) {
+      this->CMakeInstance->IssueMessage(
+        MessageType::FATAL_ERROR,
+        cmStrCat("Could not parse framework path \"", item.Value,
+                 "\" linked by target ", this->Target->GetName(), '.'),
+        item.Backtrace);
+      return;
+    }
+    if (!fwItems->first.empty()) {
+      // Add the directory portion to the framework search path.
+      this->AddFrameworkPath(fwItems->first);
+    }
+    this->Items.emplace_back(fwItems->second, ItemIsPath::Yes, target,
+                             this->FindLibraryFeature(entry.Feature));
+  } else {
+    // Now add the full path to the library.
+    this->Items.emplace_back(
+      item, ItemIsPath::Yes, target,
+      this->FindLibraryFeature(
+        entry.Feature == DEFAULT
+          ? (target->IsFrameworkOnApple() && this->GlobalGenerator->IsXcode()
+               ? "FRAMEWORK"
+               : "__CMAKE_LINK_LIBRARY")
+          : entry.Feature));
+  }
 }
 
 void cmComputeLinkInformation::AddFullItem(LinkEntry const& entry)
@@ -1680,7 +1712,8 @@ void cmComputeLinkInformation::AddFrameworkItem(LinkEntry const& entry)
   std::string const& item = entry.Item.Value;
 
   // Try to separate the framework name and path.
-  auto fwItems = this->GlobalGenerator->SplitFrameworkPath(item);
+  auto fwItems =
+    this->GlobalGenerator->SplitFrameworkPath(item, entry.Feature != DEFAULT);
   if (!fwItems) {
     std::ostringstream e;
     e << "Could not parse framework path \"" << item << "\" "
@@ -1691,24 +1724,34 @@ void cmComputeLinkInformation::AddFrameworkItem(LinkEntry const& entry)
 
   std::string fw_path = std::move(fwItems->first);
   std::string fw = std::move(fwItems->second);
-  std::string full_fw = cmStrCat(fw_path, '/', fw, ".framework/", fw);
+  std::string full_fw = cmStrCat(fw, ".framework/", fw);
 
-  // Add the directory portion to the framework search path.
-  this->AddFrameworkPath(fw_path);
+  if (!fw_path.empty()) {
+    full_fw = cmStrCat(fw_path, '/', full_fw);
+    // Add the directory portion to the framework search path.
+    this->AddFrameworkPath(fw_path);
+  }
 
   // add runtime information
   this->AddLibraryRuntimeInfo(full_fw);
 
+  if (entry.Feature == DEFAULT) {
+    // ensure FRAMEWORK feature is loaded
+    this->AddLibraryFeature("FRAMEWORK");
+  }
+
   if (this->GlobalGenerator->IsXcode()) {
     // Add framework path - it will be handled by Xcode after it's added to
     // "Link Binary With Libraries" build phase
-    this->Items.emplace_back(item, ItemIsPath::Yes);
+    this->Items.emplace_back(item, ItemIsPath::Yes, nullptr,
+                             this->FindLibraryFeature(entry.Feature == DEFAULT
+                                                        ? "FRAMEWORK"
+                                                        : entry.Feature));
   } else {
-    // Add the item using the -framework option.
-    this->Items.emplace_back(std::string("-framework"), ItemIsPath::No);
-    cmOutputConverter converter(this->Makefile->GetStateSnapshot());
-    fw = converter.EscapeForShell(fw);
-    this->Items.emplace_back(fw, ItemIsPath::No);
+    this->Items.emplace_back(fw, ItemIsPath::Yes, nullptr,
+                             this->FindLibraryFeature(entry.Feature == DEFAULT
+                                                        ? "FRAMEWORK"
+                                                        : entry.Feature));
   }
 }
 

Source/cmComputeLinkInformation.h

@@ -63,6 +63,11 @@ public:
     cmGeneratorTarget const* Target = nullptr;
 
     bool HasFeature() const { return this->Feature != nullptr; }
+    const std::string& GetFeatureName() const
+    {
+      return HasFeature() ? this->Feature->Name
+                          : cmComputeLinkDepends::LinkEntry::DEFAULT;
+    }
 
     BT<std::string> GetFormattedItem(std::string const& path) const
     {

Source/cmGlobalGenerator.cxx

@@ -2529,7 +2529,8 @@ bool cmGlobalGenerator::NameResolvesToFramework(
 // .tbd files also can be located in SDK frameworks (they are
 // placeholders for actual libraries shipped with the OS)
 cm::optional<std::pair<std::string, std::string>>
-cmGlobalGenerator::SplitFrameworkPath(const std::string& path) const
+cmGlobalGenerator::SplitFrameworkPath(const std::string& path,
+                                      bool extendedFormat) const
 {
   // Check for framework structure:
   //    (/path/to/)?FwName.framework
@@ -2550,6 +2551,16 @@ cmGlobalGenerator::SplitFrameworkPath(const std::string& path) const
     return std::pair<std::string, std::string>{ frameworkPath.match(2), name };
   }
 
+  if (extendedFormat) {
+    // path format can be more flexible: (/path/to/)?fwName(.framework)?
+    auto fwDir = cmSystemTools::GetParentDirectory(path);
+    auto name = cmSystemTools::GetFilenameLastExtension(path) == ".framework"
+      ? cmSystemTools::GetFilenameWithoutExtension(path)
+      : cmSystemTools::GetFilenameName(path);
+
+    return std::pair<std::string, std::string>{ fwDir, name };
+  }
+
   return cm::nullopt;
 }
 

Source/cmGlobalGenerator.h

@@ -368,9 +368,12 @@ public:
       that is a framework. */
   bool NameResolvesToFramework(const std::string& libname) const;
   /** Split a framework path to the directory and name of the framework
-   * returns std::nullopt if the path does not match with framework format */
+   * returns std::nullopt if the path does not match with framework format
+   * when extendedFormat is true, required format is relaxed (i.e. extension
+   * `.framework' is optional). Used when FRAMEWORK link feature is
+   * specified */
   cm::optional<std::pair<std::string, std::string>> SplitFrameworkPath(
-    const std::string& path) const;
+    const std::string& path, bool extendedFormat = false) const;
 
   cmMakefile* FindMakefile(const std::string& start_dir) const;
   cmLocalGenerator* FindLocalGenerator(cmDirectoryId const& id) const;

Source/cmGlobalXCodeGenerator.cxx

@@ -3519,13 +3519,14 @@ void cmGlobalXCodeGenerator::AddDependAndLinkInformation(cmXCodeObject* target)
     } else {
       linkDir = libItem->Value.Value;
     }
-    linkDir = this->GetLibraryOrFrameworkPath(linkDir);
-    bool isFramework = cmSystemTools::IsPathToFramework(linkDir);
-    linkDir = cmSystemTools::GetParentDirectory(linkDir);
-    if (isFramework) {
-      if (std::find(frameworkSearchPaths.begin(), frameworkSearchPaths.end(),
-                    linkDir) == frameworkSearchPaths.end()) {
-        frameworkSearchPaths.push_back(linkDir);
+    if (cmHasSuffix(libItem->GetFeatureName(), "FRAMEWORK"_s)) {
+      auto fwItems = this->SplitFrameworkPath(linkDir, true);
+      if (fwItems && !fwItems->first.empty()) {
+        linkDir = std::move(fwItems->first);
+        if (std::find(frameworkSearchPaths.begin(), frameworkSearchPaths.end(),
+                      linkDir) == frameworkSearchPaths.end()) {
+          frameworkSearchPaths.push_back(linkDir);
+        }
       }
     } else {
       if (std::find(linkSearchPaths.begin(), linkSearchPaths.end(), linkDir) ==
@@ -3533,7 +3534,7 @@ void cmGlobalXCodeGenerator::AddDependAndLinkInformation(cmXCodeObject* target)
         linkSearchPaths.push_back(linkDir);
       }
     }
-    // Add target dependency
+
     if (libItem->Target && !libItem->Target->IsImported()) {
       for (auto const& configName : this->CurrentConfigurationTypes) {
         target->AddDependTarget(configName, libItem->Target->GetName());
@@ -3707,24 +3708,27 @@ void cmGlobalXCodeGenerator::AddDependAndLinkInformation(cmXCodeObject* target)
           if (cmSystemTools::FileIsFullPath(cleanPath)) {
             cleanPath = cmSystemTools::CollapseFullPath(cleanPath);
           }
-          const auto libPath = this->GetLibraryOrFrameworkPath(cleanPath);
-          if (cmSystemTools::StringEndsWith(libPath.c_str(), ".framework")) {
-            const auto fwName =
-              cmSystemTools::GetFilenameWithoutExtension(libPath);
-            const auto fwDir = cmSystemTools::GetParentDirectory(libPath);
-            if (emitted.insert(fwDir).second) {
-              // This is a search path we had not added before and it isn't an
-              // implicit search path, so we need it
-              libPaths.Add("-F " + this->XCodeEscapePath(fwDir));
+          bool isFramework =
+            cmHasSuffix(libName.GetFeatureName(), "FRAMEWORK"_s);
+          if (isFramework) {
+            const auto fwItems =
+              this->SplitFrameworkPath(cleanPath, isFramework);
+            if (!fwItems->first.empty() &&
+                emitted.insert(fwItems->first).second) {
+              // This is a search path we had not added before and it isn't
+              // an implicit search path, so we need it
+              libPaths.Add("-F " + this->XCodeEscapePath(fwItems->first));
             }
-            libPaths.Add("-framework " + this->XCodeEscapePath(fwName));
+            libPaths.Add(
+              libName.GetFormattedItem(this->XCodeEscapePath(fwItems->second))
+                .Value);
           } else {
             libPaths.Add(
               libName.GetFormattedItem(this->XCodeEscapePath(cleanPath))
                 .Value);
           }
           if ((!libName.Target || libName.Target->IsImported()) &&
-              IsLinkPhaseLibraryExtension(libPath)) {
+              (isFramework || IsLinkPhaseLibraryExtension(cleanPath))) {
             // Create file reference for embedding
             auto it = this->ExternalLibRefs.find(cleanPath);
             if (it == this->ExternalLibRefs.end()) {
@@ -3892,8 +3896,8 @@ void cmGlobalXCodeGenerator::AddEmbeddedFrameworks(cmXCodeObject* target)
 {
   static const auto dstSubfolderSpec = "10";
 
-  // Despite the name, by default Xcode uses "Embed Frameworks" build phase for
-  // both frameworks and dynamic libraries
+  // Despite the name, by default Xcode uses "Embed Frameworks" build phase
+  // for both frameworks and dynamic libraries
   this->AddEmbeddedObjects(target, "Embed Frameworks",
                            "XCODE_EMBED_FRAMEWORKS", dstSubfolderSpec,
                            NoActionOnCopyByDefault);

Tests/RunCMake/CMakeLists.txt

@@ -659,6 +659,7 @@ add_RunCMake_test(target_link_libraries-LINK_LIBRARY -DCMAKE_SYSTEM_NAME=${CMAKE
                                                      -DMSYS=${MSYS}
                                                      -DCYGWIN=${CYGWIN}
                                                      -DCMAKE_C_COMPILER_ID=${CMAKE_C_COMPILER_ID}
+                                                     -DCMAKE_C_COMPILER_VERSION=${CMAKE_C_COMPILER_VERSION}
                                                      -DMSVC_VERSION=${MSVC_VERSION}
                                                      -DCMAKE_SHARED_LIBRARY_PREFIX=${CMAKE_SHARED_LIBRARY_PREFIX}
                                                      -DCMAKE_SHARED_LIBRARY_SUFFIX=${CMAKE_SHARED_LIBRARY_SUFFIX}

Tests/RunCMake/target_link_libraries-LINK_LIBRARY/RunCMakeTest.cmake

@@ -79,3 +79,21 @@ if ((RunCMake_GENERATOR MATCHES "Makefiles|Ninja|Xcode"
   unset(RunCMake_TEST_OUTPUT_MERGE)
 
 endif()
+
+# Apple framework features
+if(APPLE AND (CMAKE_C_COMPILER_ID STREQUAL "GNU" OR CMAKE_C_COMPILER_ID MATCHES "Clang"))
+  run_cmake(apple_framework)
+  run_cmake_target(apple_framework framework main-framework)
+  run_cmake_target(apple_framework reexport_framework main-reexport_framework)
+  run_cmake_target(apple_framework weak_framework main-weak_framework)
+
+  run_cmake_target(apple_framework target-framework main-target-framework)
+  run_cmake_target(apple_framework target-reexport_framework main-target-reexport_framework)
+  run_cmake_target(apple_framework target-weak_framework main-target-weak_framework)
+endif()
+
+if (CMAKE_C_COMPILER_ID STREQUAL "AppleClang" AND CMAKE_C_COMPILER_VERSION GREATER_EQUAL "12")
+  run_cmake_target(apple_framework needed_framework main-needed_framework)
+
+  run_cmake_target(apple_framework target-needed_framework main-target-needed_framework)
+endif()

Tests/RunCMake/target_link_libraries-LINK_LIBRARY/apple_framework.cmake

@@ -0,0 +1,61 @@
+
+enable_language(OBJCXX)
+
+
+# feature FRAMEWORK
+add_library(foo-framework SHARED foo.mm)
+target_link_libraries(foo-framework PRIVATE "$<LINK_LIBRARY:FRAMEWORK,Foundation>")
+
+add_executable(main-framework main.mm)
+target_link_libraries(main-framework PRIVATE "$<LINK_LIBRARY:FRAMEWORK,Foundation>" foo-framework)
+
+
+# feature NEEDED_FRAMEWORK
+add_library(foo-needed_framework SHARED foo.mm)
+target_link_libraries(foo-needed_framework PRIVATE "$<LINK_LIBRARY:NEEDED_FRAMEWORK,Foundation>")
+
+add_executable(main-needed_framework main.mm)
+target_link_libraries(main-needed_framework PRIVATE "$<LINK_LIBRARY:FRAMEWORK,Foundation>" foo-needed_framework)
+
+
+# feature REEXPORT_FRAMEWORK
+add_library(foo-reexport_framework SHARED foo.mm)
+target_link_libraries(foo-reexport_framework PRIVATE "$<LINK_LIBRARY:REEXPORT_FRAMEWORK,Foundation>")
+
+add_executable(main-reexport_framework main.mm)
+target_link_libraries(main-reexport_framework PRIVATE "$<LINK_LIBRARY:FRAMEWORK,Foundation>" foo-reexport_framework)
+
+
+# feature WEAK_FRAMEWORK
+add_library(foo-weak_framework SHARED foo.mm)
+target_link_libraries(foo-weak_framework PRIVATE "$<LINK_LIBRARY:WEAK_FRAMEWORK,Foundation>")
+
+add_executable(main-weak_framework main.mm)
+target_link_libraries(main-weak_framework PRIVATE "$<LINK_LIBRARY:FRAMEWORK,Foundation>" foo-weak_framework)
+
+
+##
+## Consumption of target specified as FRAMEWORK
+add_library(target-framework SHARED foo.mm)
+set_target_properties(target-framework PROPERTIES FRAMEWORK TRUE)
+target_link_libraries(target-framework PRIVATE "$<LINK_LIBRARY:FRAMEWORK,Foundation>")
+
+
+# feature FRAMEWORK
+add_executable(main-target-framework main.mm)
+target_link_libraries(main-target-framework PRIVATE "$<LINK_LIBRARY:FRAMEWORK,Foundation>" "$<LINK_LIBRARY:FRAMEWORK,target-framework>")
+
+
+# feature NEEDED_FRAMEWORK
+add_executable(main-target-needed_framework main.mm)
+target_link_libraries(main-target-needed_framework PRIVATE "$<LINK_LIBRARY:FRAMEWORK,Foundation>" "$<LINK_LIBRARY:NEEDED_FRAMEWORK,target-framework>")
+
+
+# feature REEXPORT_FRAMEWORK
+add_executable(main-target-reexport_framework main.mm)
+target_link_libraries(main-target-reexport_framework PRIVATE "$<LINK_LIBRARY:FRAMEWORK,Foundation>" "$<LINK_LIBRARY:REEXPORT_FRAMEWORK,target-framework>")
+
+
+# feature WEAK_FRAMEWORK
+add_executable(main-target-weak_framework main.mm)
+target_link_libraries(main-target-weak_framework PRIVATE "$<LINK_LIBRARY:FRAMEWORK,Foundation>" "$<LINK_LIBRARY:REEXPORT_FRAMEWORK,target-framework>")

Tests/RunCMake/target_link_libraries-LINK_LIBRARY/foo.h

@@ -0,0 +1,9 @@
+#import <Foundation/Foundation.h>
+
+@interface Foo : NSObject {
+  NSNumber* age;
+}
+
+@property (nonatomic, retain) NSNumber* age;
+
+@end

Tests/RunCMake/target_link_libraries-LINK_LIBRARY/foo.mm

@@ -0,0 +1,7 @@
+#import "foo.h"
+
+@implementation Foo
+
+@synthesize age;
+
+@end

Tests/RunCMake/target_link_libraries-LINK_LIBRARY/main.mm

@@ -0,0 +1,14 @@
+#import <Foundation/Foundation.h>
+#import "foo.h"
+#include <iostream>
+
+int main(int argc, char **argv)
+{
+  NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
+  Foo *theFoo = [[Foo alloc] init];
+  theFoo.age = [NSNumber numberWithInt:argc];
+  NSLog(@"%d\n",[theFoo.age intValue]);
+  std::cout << [theFoo.age intValue] << std::endl;
+  [pool release];
+  return 0;
+}