Allow imported INTERFACE libraries to specify a link library name

Add an `IMPORTED_LIBNAME[_<CONFIG>]` target property to specify a library
name to be placed on the link line in place of an interface library
since it has no library file of its own.  Restrict use of the property
to imported `INTERFACE` libraries.

This will be particularly useful for find modules that need to provide
imported libraries from system SDKs where the full path to the library
file is not known.  Now such find modules will be able to provide an
imported interface library and set `IMPORTED_LIBNAME` to refer to the
SDK library by name.

Issue: #15267

1 files changed, 4 insertions, 0 deletions

diff --git a/Source/cmGeneratorTarget.h b/Source/cmGeneratorTarget.h
index 3805bfc457..4c3c14ba94 100644
--- a/Source/cmGeneratorTarget.h
+++ b/Source/cmGeneratorTarget.h
@@ -147,6 +147,9 @@ public:
                                      const cmGeneratorTarget* head,
                                      bool usage_requirements_only) const;
 
+  /** Get the library name for an imported interface library.  */
+  std::string GetImportedLibName(std::string const& config) const;
+
   /** Get the full path to the target according to the settings in its
       makefile and the configuration type.  */
   std::string GetFullPath(const std::string& config = "", bool implib = false,
@@ -643,6 +646,7 @@ private:
     std::string Location;
     std::string SOName;
     std::string ImportLibrary;
+    std::string LibName;
     std::string Languages;
     std::string Libraries;
     std::string LibrariesProp;