fix using a CustomTargetIndex for vs_module_defs

Because `CustomTargetIndex`es don't have a `subdir` property, but they do
implement the `get_subdir()` method

1 files changed, 3 insertions, 3 deletions

diff --git a/mesonbuild/build.py b/mesonbuild/build.py
index 7b5cfa7..10f2261 100644
--- a/mesonbuild/build.py
+++ b/mesonbuild/build.py
@@ -2331,13 +2331,13 @@ class SharedLibrary(BuildTarget):
             elif isinstance(path, File):
                 # When passing a generated file.
                 self.vs_module_defs = path
-            elif isinstance(path, CustomTarget):
+            elif isinstance(path, (CustomTarget, CustomTargetIndex)):
                 # When passing output of a Custom Target
-                self.vs_module_defs = File.from_built_file(path.subdir, path.get_filename())
+                self.vs_module_defs = File.from_built_file(path.get_subdir(), path.get_filename())
             else:
                 raise InvalidArguments(
                     'Shared library vs_module_defs must be either a string, '
-                    'a file object or a Custom Target')
+                    'a file object, a Custom Target, or a Custom Target Index')
             self.process_link_depends(path)
 
         rust_abi = kwargs.get('rust_abi')