(#19606) [vulkan-validationlayers] Fix discovery of libVkLayer_khrono…

…s_validation

* [vulkan-validationlayers] Fix discovery of libVkLayer_khronos_validation

* Add libdirs to the runtime lib discovery path to enable
  libVlLayer_khronos_validation.{so,dll,dylib} to be discovered
  appropriately at runtime. This package exports both a static library
  and a shared library, of which, only the static library should be
  linked against. The shared library is loaded dynamically by
  vulkan-loader, and still needs to be discoverable. Because this is not
  a shared library, these paths are not exported automatically and
  therefore are required to be explicitly set.

Closes #19605

* Remove notification of runtime_lib_discovery_path update

Co-authored-by: SpaceIm <30052553+SpaceIm@users.noreply.github.com>

---------

Co-authored-by: SpaceIm <30052553+SpaceIm@users.noreply.github.com>
Co-authored-by: Rubén Rincón Blanco <rubenrb@jfrog.com>

recipes/vulkan-validationlayers/all/conanfile.py

@@ -225,5 +225,17 @@ def package_info(self):
         manifest_subfolder = "bin" if self.settings.os == "Windows" else os.path.join("res", "vulkan", "explicit_layer.d")
         vk_layer_path = os.path.join(self.package_folder, manifest_subfolder)
         self.runenv_info.prepend_path("VK_LAYER_PATH", vk_layer_path)
+
+        # Update runtime discovery paths to allow libVkLayer_khronos_validation.{so,dll,dylib} to be discovered
+        # and loaded by vulkan-loader when the consumer executes
+        # This is necessary because this package exports a static lib to link against and a dynamic lib to load at runtime
+        runtime_lib_discovery_path = "LD_LIBRARY_PATH"
+        if self.settings.os == "Windows":
+            runtime_lib_discovery_path = "PATH"
+        if self.settings.os == "Macos":
+            runtime_lib_discovery_path = "DYLD_LIBRARY_PATH"
+        for libdir in [os.path.join(self.package_folder, libdir) for libdir in self.cpp_info.libdirs]:
+            self.runenv_info.prepend_path(runtime_lib_discovery_path, libdir)
+
         # TODO: to remove after conan v2, it allows to not break consumers still relying on virtualenv generator
         self.env_info.VK_LAYER_PATH.append(vk_layer_path)