CPS: Support exporting "link dependent libraries".

Teach CPS export to fill the `dyld_requires` attribute based on the
equivalent of the `IMPORTED_LINK_DEPENDENT_LIBRARIES` CMake property.
(Note that, in practice, I don't believe this can ever contain
non-targets, and CPS does not anyway support the `dyld_libraries`
attribute that those would require at this time.

Issue: #27501

Source/cmExportPackageInfoGenerator.cxx

@@ -30,7 +30,7 @@
 #include "cmSystemTools.h"
 #include "cmTarget.h"
 
-static std::string const kCPS_VERSION_STR = "0.14.0";
+static std::string const kCPS_VERSION_STR = "0.14.1";
 
 cmExportPackageInfoGenerator::cmExportPackageInfoGenerator(
   cmPackageInfoArguments arguments)
@@ -565,6 +565,22 @@ Json::Value cmExportPackageInfoGenerator::GenerateInterfaceConfigProperties(
       component["location"] = p.second;
     } else if (prop == "IMPLIB") {
       component["link_location"] = p.second;
+    } else if (prop == "LINK_DEPENDENT_LIBRARIES") {
+      bool result;
+      std::vector<std::string> libraries;
+      std::vector<std::string> components =
+        this->ExtractRequirements(cmList{ p.second }, result, libraries);
+      BuildArray(component, "dyld_requires", components);
+      if (!libraries.empty()) {
+        // In theory this can never happen?
+        this->IssueMessage(
+          MessageType::AUTHOR_WARNING,
+          cmStrCat("Package \""_s, this->GetPackageName(),
+                   "\" has IMPORTED_LINK_DEPENDENT_LIBRARIES \""_s,
+                   cmJoin(libraries, ";"_s), this->PackageVersionSchema,
+                   "\". These cannot be exported. "
+                   "Consumers may encounter link errors."_s));
+      }
     } else if (prop == "LINK_INTERFACE_LANGUAGES") {
       std::vector<std::string> languages;
       for (auto const& lang : cmList{ p.second }) {

Tests/RunCMake/ExportPackageInfo/LinkDependentLibraries-check.cmake

@@ -0,0 +1,15 @@
+include(${CMAKE_CURRENT_LIST_DIR}/Assertions.cmake)
+
+set(out_dir "${RunCMake_BINARY_DIR}/LinkDependentLibraries-build")
+
+file(READ "${out_dir}/dyld.cps" content)
+expect_value("${content}" "dyld" "name")
+expect_value("${content}" "dylib" "components" "private" "type")
+expect_value("${content}" "dylib" "components" "public" "type")
+
+expect_array(
+  "${content}" 1
+  "components" "public" "configurations" "generic" "dyld_requires")
+expect_value(
+  "${content}" ":private"
+  "components" "public" "configurations" "generic" "dyld_requires" 0)

Tests/RunCMake/ExportPackageInfo/LinkDependentLibraries.cmake

@@ -0,0 +1,16 @@
+project(dyld CXX)
+
+get_property(_isMultiConfig GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+if(_isMultiConfig)
+  set(CMAKE_CONFIGURATION_TYPES "generic" CACHE STRING "" FORCE)
+else()
+  set(CMAKE_BUILD_TYPE "generic" CACHE STRING "" FORCE)
+endif()
+
+add_library(private SHARED foo.cxx)
+add_library(public SHARED foo.cxx)
+
+target_link_libraries(public PRIVATE private)
+
+install(TARGETS private public EXPORT dyld DESTINATION .)
+export(PACKAGE_INFO dyld EXPORT dyld)

Tests/RunCMake/ExportPackageInfo/RunCMakeTest.cmake

@@ -43,6 +43,7 @@ run_cmake(Minimal)
 run_cmake(MinimalVersion)
 run_cmake(LowerCaseFile)
 run_cmake(Requirements)
+run_cmake(LinkDependentLibraries)
 run_cmake(ExportSymbolicComponent)
 run_cmake(TargetTypes)
 run_cmake(DependsMultiple)