Getting ghc/Main.hs to import modules

[Anton Xue]

Hey Carter,

Thanks for getting back to me.

I've tried sticking a "network == 2.8.0.0" dependency into different
combinations of the following files:

- compiler/ghc.cabal.in
- ghc/ghc-bin.cabal.in
- utils/ghc-cabal/ghc-cabal.cabal
- utils/ghc-pkg-ghc-pkg.cabal


In addition, I've also tried adding a "-ilibraries/network" into
utils/ghc-cabal/ghc.mk

At the moment, there is evidently some progress, since it fails with:


Configuring ghc-pkg-6.9...
Configuring ghc-8.2.2...
ghc-cabal: Encountered missing dependencies:
network ==2.8.0.0
utils/ghc-pkg/ghc.mk:64: recipe for target 'utils/ghc-pkg/dist/
package-data.mk' failed
make[1]: *** [utils/ghc-pkg/dist/package-data.mk] Error 1
make[1]: *** Waiting for unfinished jobs....
ghc-cabal: Encountered missing dependencies:
network ==2.8.0.0
compiler/ghc.mk:587: recipe for target 'compiler/stage1/package-data.mk'
failed
make[1]: *** [compiler/stage1/package-data.mk] Error 1
Makefile:122: recipe for target 'all' failed
make: *** [all] Error 2


However, from here I'm stuck.

The network package that already exists on my system is also 2.8.0.0.


Anton

On Thu, Jan 3, 2019 at 2:34 PM Carter Schonwald <carter.schonwald at gmail.com>
wrote:

> you will need to edit the associated cabal file
>
> On Wed, Jan 2, 2019 at 10:49 PM Anton Xue <antonxue1572 at gmail.com> wrote:
>
>> Hey all,
>>
>> I want to make modifications to a custom version of ghc/Main.hs that
>> depends on packages not natively shipped with GHC 8.2.2.
>>
>> In short, I want to be able to write "import Network" (
>> http://hackage.haskell.org/package/network-2.8.0.0) in ghc/Main.hs and
>> then build GHC from source. However, I am running into some problems, and
>> here is what I have attempted based on the Building/Modifying page (
>> https://ghc.haskell.org/trac/ghc/wiki/Building/Modifying):
>>
>> 1. I downloaded a copy of the network package and placed it in
>> libraries/network.
>> 2. I added an entry to the packages file for library/network, and used
>> dashes for all the other entries.
>> 3. perl boot
>> 4. I modified ghc.mk and placed libraries/network as the first
>> PACKAGES_STAGE1 append right before ghc-prim
>> 5. make -j5
>>
>> The build then fails complaining that:
>>
>> ghc/Main.hs:77:8: error:
>>     Could not find module ‘Network’
>>     Use -v to see a list of the files searched for.
>>    |
>> 77 | import Network
>>
>>
>> A similar problem also appears when I replace "import Network" with
>> "import System.Console.Haskeline", which is strange considering that
>> haskeline was shipped with GHC 8.2.2. However, other imports such as
>> "import System.CPUTime", which was defined in base, do not raise this
>> error. Otherwise GHC builds fine with no errors.
>>
>> I am wondering what I should do to solve this issue.
>>
>>
>> Thank you,
>>
>> Anton
>>
>>
>> _______________________________________________
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>> ghc-devs at haskell.org
>> http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs
>>
>
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