diff options
| -rw-r--r-- | compiler/GHC/Driver/MakeFile.hs | 10 | ||||
| -rw-r--r-- | docs/users_guide/separate_compilation.rst | 5 |
2 files changed, 8 insertions, 7 deletions
diff --git a/compiler/GHC/Driver/MakeFile.hs b/compiler/GHC/Driver/MakeFile.hs index 5719b7dc04..382d8d6b43 100644 --- a/compiler/GHC/Driver/MakeFile.hs +++ b/compiler/GHC/Driver/MakeFile.hs @@ -73,15 +73,17 @@ doMkDependHS srcs = do -- We therefore do the initial dependency generation with an empty -- way and .o/.hi extensions, regardless of any flags that might -- be specified. - let dflags = dflags0 + let dflags1 = dflags0 { targetWays_ = Set.empty , hiSuf_ = "hi" , objectSuf_ = "o" } - GHC.setSessionDynFlags dflags + GHC.setSessionDynFlags dflags1 - when (null (depSuffixes dflags)) $ liftIO $ - throwGhcExceptionIO (ProgramError "You must specify at least one -dep-suffix") + -- If no suffix is provided, use the default -- the empty one + let dflags = if null (depSuffixes dflags1) + then dflags1 { depSuffixes = [""] } + else dflags1 tmpfs <- hsc_tmpfs <$> getSession files <- liftIO $ beginMkDependHS logger tmpfs dflags diff --git a/docs/users_guide/separate_compilation.rst b/docs/users_guide/separate_compilation.rst index 2e4a0df1e2..64e6590942 100644 --- a/docs/users_guide/separate_compilation.rst +++ b/docs/users_guide/separate_compilation.rst @@ -1297,7 +1297,7 @@ following to your ``Makefile``: .. code-block:: make depend : - ghc -dep-suffix '' -M $(HC_OPTS) $(SRCS) + ghc -M $(HC_OPTS) $(SRCS) Now, before you start compiling, and any time you change the ``imports`` in your program, do ``make depend`` before you do ``make cool_pgm``. The command @@ -1401,8 +1401,7 @@ generation are: Multiple ``-dep-suffix`` flags are permitted. For example, ``-dep-suffix a_ -dep-suffix b_`` will make dependencies for ``.hs`` on ``.hi``, ``.a_hs`` on ``.a_hi``, and ``.b_hs`` on ``.b_hi``. - Note that you must provide at least one suffix; if you do not want a suffix - then pass ``-dep-suffix ''``. + If you do not use this flag then the empty suffix is used. .. ghc-flag:: --exclude-module=⟨file⟩ :shortdesc: Regard ``⟨file⟩`` as "stable"; i.e., exclude it from having |