#15483: ghc -M requires -dep-suffix for no good reason -------------------------------------+------------------------------------- Reporter: ulysses4ever | Owner: (none) Type: feature | Status: new request | Priority: normal | Milestone: 8.6.1 Component: Driver | Version: 8.4.3 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- Doing {{{ ghc -M Foo.hs }}} gives {{{ You must specify at least one -dep-suffix }}} I went to the documentation and noticed ([https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/separate_com... #makefile-dependencies 7.8.12]) an example: {{{ depend : ghc -dep-suffix '' -M $(HC_OPTS) $(SRCS) }}} So, empty suffix is fine. Why not default to empty string then? I found a commit which introduced the requirement ([https://github.com/ghc/ghc/commit/af072fc35d8dbe7962e62700da052593e999c0ef af072fc]): it says, it fixed #7381, and this doesn't seem to do anything with `dep-suffix` in particular. So, maybe there is no good reason to require that. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15483 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler