Clemens Fruhwirth wrote:
Hello everyone,
I would like to hack on GHC interactively. My aim is to load ghc into
ghci and start hacking a source file in one emacs buffer, while the
other hosts an inferior-haskell session connected to GHCi. I really
like this kind of development style and found it to be way more
productive than "edit/compile/test/restart from edit".
To context of the following is the compiler/ subtree, as I'm primarily
interested in that. I tried to:
* load all GHC compiler source files into ghci, fails because of
occassional unboxed types (bytecode generated can't deal with them)
* load all .o files (with unboxed types) and load a modified source in
interpreted mode. This doesn't work well because for that approach you
need to mix the source with the object in the same directory (copy
compiler/**/*.[l]hs to stage1 or stage2). This, fails because
there seem to be some sources missing, I have not investiged where the
.o-boot files come from like compiler/stage2/basicTypes/OccName.o-boot.
With source files, GHCi just ignores the existing .o file (resumable
because it can't check whether the .o file is more recent than the
source file)
This is something we haven't tried, although if you get all the files in the
right places I don't see any reason why it shouldn't work.
* load "ghci -package ghc" and load main/Main.hs. This work pretty well,
but only in comparsion to the other approaches -- that means loading
does not fail. Invoking ":main -c foobar.hs" freezes the ghci
session. With this approach I can not change any module withing
the packaged ghc. Is that true? But that's what I want to do (in
particular to the parser part).
It should be possible to do this, except that I'm fairly certain you'll run into
trouble if you try to run GHCi within itself due to the global state of the RTS
linker. But just doing ordinary compilation in GHC loaded into GHCi should
work. We have done some simple experiments using the GHC API from inside GHCi.
It sounds like there's a straightforward way to show the problem, so could you
submit a ticket detailing what you did to reproduce it? Thanks.
Simon
_______________________________________________
Glasgow-haskell-users mailing list
Glasgow-haskell-users@haskell.org
http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
