cmExportFileGenerator: export link libraries as-is

This allows for transitive modules to work because
`$<COMPILE_ONLY>`-wrapped dependencies do not end up in the
`linked-target-dirs` collator property. Test suite exported property
tests updated to account for the change.

Source/cmExportFileGenerator.cxx

@@ -1360,11 +1360,7 @@ bool cmExportFileGenerator::PopulateCxxModuleExportProperties(
       auto value = cmGeneratorExpression::Preprocess(*prop, ctx);
       this->ResolveTargetsInGeneratorExpressions(
         value, gte, cmExportFileGenerator::ReplaceFreeTargets);
-      std::vector<std::string> wrappedValues;
-      for (auto& item : cmList{ value }) {
-        wrappedValues.push_back(cmStrCat("$<COMPILE_ONLY:", item, '>'));
-      }
-      properties[exportedPropName] = cmJoin(wrappedValues, ";");
+      properties[exportedPropName] = value;
     }
   }
 

Tests/RunCMake/CXXModules/examples/export-transitive-targets-build/test/CMakeLists.txt

@@ -10,7 +10,7 @@ endif ()
 
 get_property(transitive_targets TARGET CXXModules::export_transitive_targets
   PROPERTY IMPORTED_CXX_MODULES_LINK_LIBRARIES)
-if (NOT transitive_targets STREQUAL "$<COMPILE_ONLY:CXXModules::usage_reqs>")
+if (NOT transitive_targets STREQUAL "CXXModules::usage_reqs")
   message(FATAL_ERROR
     "Incorrect transitive link library in C++ module interface CXXModules::export_transitive_targets:\n  ${transitive_targets}")
 endif ()

Tests/RunCMake/CXXModules/examples/export-transitive-targets-install/test/CMakeLists.txt

@@ -10,7 +10,7 @@ endif ()
 
 get_property(transitive_targets TARGET CXXModules::export_transitive_targets
   PROPERTY IMPORTED_CXX_MODULES_LINK_LIBRARIES)
-if (NOT transitive_targets STREQUAL "$<COMPILE_ONLY:CXXModules::usage_reqs>")
+if (NOT transitive_targets STREQUAL "CXXModules::usage_reqs")
   message(FATAL_ERROR
     "Incorrect transitive link library in C++ module interface CXXModules::export_transitive_targets:\n  ${transitive_targets}")
 endif ()

Tests/RunCMake/CXXModules/examples/export-usage-build/test/CMakeLists.txt

@@ -41,7 +41,7 @@ check_property("/usr/exported;/usr/buildiface" "IMPORTED_CXX_MODULES_INCLUDE_DIR
 check_property("exported;buildiface" "IMPORTED_CXX_MODULES_COMPILE_DEFINITIONS")
 check_property("cxx_std_20;cxx_std_11;cxx_std_14" "IMPORTED_CXX_MODULES_COMPILE_FEATURES")
 check_property("${export_interfaces_flag}100;${export_interfaces_flag}200" "IMPORTED_CXX_MODULES_COMPILE_OPTIONS")
-check_property("$<COMPILE_ONLY:CXXModules::export_used>;$<COMPILE_ONLY:CXXModules::export_build>" "IMPORTED_CXX_MODULES_LINK_LIBRARIES")
+check_property("CXXModules::export_used;CXXModules::export_build" "IMPORTED_CXX_MODULES_LINK_LIBRARIES")
 
 # Extract the export-dependent targets from the export file.
 file(STRINGS "${export_usage_DIR}/export_usage-targets.cmake" usage_dependent_targets

Tests/RunCMake/CXXModules/examples/export-usage-install/test/CMakeLists.txt

@@ -41,7 +41,7 @@ check_property("/usr/exported;/usr/installiface" "IMPORTED_CXX_MODULES_INCLUDE_D
 check_property("exported;installiface" "IMPORTED_CXX_MODULES_COMPILE_DEFINITIONS")
 check_property("cxx_std_20;cxx_std_11;cxx_std_17" "IMPORTED_CXX_MODULES_COMPILE_FEATURES")
 check_property("${export_interfaces_flag}100;${export_interfaces_flag}300" "IMPORTED_CXX_MODULES_COMPILE_OPTIONS")
-check_property("$<COMPILE_ONLY:CXXModules::export_used>;$<COMPILE_ONLY:CXXModules::export_install>" "IMPORTED_CXX_MODULES_LINK_LIBRARIES")
+check_property("CXXModules::export_used;CXXModules::export_install" "IMPORTED_CXX_MODULES_LINK_LIBRARIES")
 
 # Extract the export-dependent targets from the export file.
 file(STRINGS "${export_usage_DIR}/export_usage-targets.cmake" usage_dependent_targets