Building a minimal/essential GHC

[Adam Wick]

Well, for the HaLVM (and maybe native client), a stage2 compiler doesn’t really make sense. So the HaLVM’s compiler is simply a stage1 compiler, somewhat extended. We do some tricks via the top level Makefile, yes, but it’s mostly a standard build for a different target, stopped at the end of the stage1 process.


- Adam

> On Jul 7, 2015, at 7:06 AM, Jakub Zalewski <jakzale at gmail.com> wrote:
> 
> Hi Adam,
> thank you for your reply; I've looked into HaLVM code and it is really helpful.
> 
> After disabling some incompatible packages (in a similar fashion to HaLVM) from ghc.mk <http://ghc.mk/> I got to an issue that configure for ghc stage2 requires those packages.
> 
> How did you solve that problem in HaLVM? Is it solved by calling parts of the ghc build system from within the top Makefile in the HaLVM repository?
> 
> Best wishes,
> Jakub
> 
> 
> On Fri, Jul 3, 2015 at 12:07 AM Adam Wick <awick at galois.com <mailto:awick at galois.com>> wrote:
> Hi Jakub -
> 
> You will find that many of these questions are things we’ve had to address in the HaLVM (http://github.com/GaloisInc/HaLVM <http://github.com/GaloisInc/HaLVM>). You may want to look in that code base for information on what we considered minimal and how we got around some of the build system and other issues a minimal build requires.
> 
> 
> - Adam
> 
> On Jul 2, 2015, at 1:20 PM, Jakub Zalewski <jakzale at gmail.com <mailto:jakzale at gmail.com>> wrote:
>> Dear all,
>> I am working on porting GHC to [native client](https://developer.chrome.com/native-client <https://developer.chrome.com/native-client>), which has some degree of POSIX-compliance.
>> 
>> I was thinking about building just the minimal/most essential parts of GHC that is enough to compile simple Haskell programs.
>> 
>> I wanted to ask which parts of GHC are the most essential and sufficient enough to compile a simple Haskell program, for instance to compile `main = putStrLn "Hello, world!"`?
>> 
>> I also wanted to ask how to force a GHC build without a particular package that comes by default, for instance how to build GHC without the `unix` package?
>> 
>> Best wishes,
>> Jakub
> 
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