#14210: bkp files cannot find TemplateHaskell symbols (even without Backpack features) -------------------------------------+------------------------------------- Reporter: ezyang | Owner: (none) Type: feature | Status: new request | Priority: low | Milestone: Component: Compiler | Version: 8.2.1 (Linking) | Keywords: backpack | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- {{{ {-# LANGUAGE TemplateHaskell #-} unit th where module TH where f = [d| x = True |] unit p where dependency th module B where import TH $(f) }}} When run, this gives: {{{ ghc: ^^ Could not load 'th_TH_f_closure', dependency unresolved. See top entry above. ByteCodeLink.lookupCE During interactive linking, GHCi couldn't find the following symbol: th_TH_f_closure This may be due to you not asking GHCi to load extra object files, archives or DLLs needed by your current session. Restart GHCi, specifying the missing library using the -L/path/to/object/dir and -lmissinglibname flags, or simply by naming the relevant files on the GHCi command line. Alternatively, this link failure might indicate a bug in GHCi. If you suspect the latter, please send a bug report to: glasgow-haskell-bugs@haskell.org }}} I am not sure how easy or hard the fix is. We should bump this priority up if we get more serious about supporting Template Haskell with Backpack. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14210 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler