in-source new-building gtk2hs/gtk3

[lspitzner]

added a cabal.project to the project, try to new-build

> git clone https://github.com/lspitzner/gtk2hs.git --depth=5 --branch=new-build
> cd gtk2hs
> cabal new-build gtk/
Resolving dependencies...
In order, the following will be built (use -v for more details):
cairo-0.13.1.1
glib-0.13.2.2
gio-0.13.1.1
pango-0.13.1.1
gtk3-0.14.2
ghc-pkg: cannot create: $PROJECT/dist-newstyle/packagedb/ghc-7.10.3 already exists

first problem. [this might appear somewhat non-deterministically. or i messed up my testing once.] fixed by just trying again:

> cabal new-build gtk/
[tons of successful compilation, until:]
$PROJECT/dist-newstyle/build/gtk3-0.14.2/setup/setup.hs:1:1:
    Could not find module ‘Prelude’
    It is a member of the hidden package ‘base-4.8.2.0’.
    Perhaps you need to add ‘base’ to the build-depends in your .cabal file.
    Use -v to see a list of the files searched for.

This seems to resemble #3320 (or #3394), but the cabal.project already adds +build-demos, i thought. well, next workaround: add custom-setup:

(new clone because i delete the entire directory anyways to prevent any residual state between builds.)

> git clone https://github.com/lspitzner/gtk2hs.git --depth=5 --branch=new-build-workaround
> cd gtk2hs
> cabal new-build gtk/
[tons of successful compilation, until:]
Linking $PROJECT/dist-newstyle/build/gtk3-0.14.2/setup/setup ...
[1 of 2] Compiling Gtk2HsSetup      ( Gtk2HsSetup.hs, dist/setup-wrapper/Gtk2HsSetup.o )
[2 of 2] Compiling Main             ( SetupMain.hs, dist/setup-wrapper/Main.o )
Linking dist/setup-wrapper/setup ...
unrecognized 'configure' option `--profiling-detail=default'

unrecognized 'configure' option `--library-profiling-detail=default'

unrecognized 'configure' option `--ipid=gtk3-0.14.2-inplace'

not sure how to continue.

[lspitzner]

the -v output before the last error above, for the compilation of setup, is:

/usr/bin/ghc
 --make
 -fbuilding-cabal-package
 -odir $PROJECT/dist-newstyle/build/gtk3-0.14.2/setup
 -hidir $PROJECT/dist-newstyle/build/gtk3-0.14.2/setup
 -i
 -i$PROJECT/gtk
 -optP-include
 -optP$PROJECT/dist-newstyle/build/gtk3-0.14.2/setup/setup_macros.h
 -hide-all-packages
 -no-user-package-db
 -package-db /home/lsp/.cabal/store/ghc-7.10.3/package.db
 -package-db $PROJECT/dist-newstyle/packagedb/ghc-7.10.3
 -package-id Cabal-1.24.0.0-a42471777a73a03da1020057a8295e49190ec4361fbf2831ed81b97ce209ad9a
 -package-id base-4.8.2.0-0d6d1084fbc041e1cded9228e80e264d
 -package-id directory-1.2.2.0-f8e14a9d121b76a00a0f669ee724a732
 -package-id filepath-1.4.0.0-f97d1e4aebfd7a03be6980454fe31d6e
 -package-id process-1.2.3.0-78f206acb2330ea8066c6c19c87356f0
 $PROJECT/dist-newstyle/build/gtk3-0.14.2/setup/setup.hs
 -o $PROJECT/dist-newstyle/build/gtk3-0.14.2/setup/setup
 -threaded

so indeed it seems be using Cabal-1.24.0.0.

(no guarantee that this is the correct interpretation, or even relevant in general.)

[lspitzner]

#3433 reports something similar to the last error for regular install. maybe that one is not new-build specific.

[lspitzner]

#3460 considers the first problem, probably.

[ezyang]

Yes, I'm going to close this as two dupes. Thanks for the report!