Background
Currently, I'm working on a project that deals with Computer Vision.
I use ..
- Haskell as programming language.
- GTK+ for creating the GUI.
- FFmpeg to read and extract videos/frames from paths or the webcam.
- some algorithms for edge-detection.
I want to ..
- render videos (unmodified input video, aswell as the modified output video) to a drawingarea-widget that is part of the GTK-library.
My setup
- Windows 10 - 64 bit
- MSYS2 / Mingw32
- Haskell Platform (GHC 8.0.1)
- Cabal Version 1.24.0.0
- ffmpeg-light-0.12.0
- gtk-0.14.6
Problem
To render videos with GTK I need to install bindings for GI, so I tried to install the package 'haskell-gi' but it fails at linking-phase due to undefined references.
Example
After running cabal install haskell-gi i get:
C:\Users\Roland\AppData\Local\Temp\cabal-tmp-1788\haskell-gi-0.20.3\dist\build/libHShaskell-gi-0.20.3-4ylmwt0eEVy4Aeczi0KBpN.a(LibGIRepository.o):fake:(.text+0x19d8): undefined reference to `g_irepository_require'
C:\Users\Roland\AppData\Local\Temp\cabal-tmp-1788\haskell-gi-0.20.3\dist\build/libHShaskell-gi-0.20.3-4ylmwt0eEVy4Aeczi0KBpN.a(LibGIRepository.o):fake:(.text+0x1f59): undefined reference to `g_typelib_symbol'
C:\Users\Roland\AppData\Local\Temp\cabal-tmp-1788\haskell-gi-0.20.3\dist\build/libHShaskell-gi-0.20.3-4ylmwt0eEVy4Aeczi0KBpN.a(LibGIRepository.o):fake:(.text+0x26f3): undefined reference to `g_irepository_prepend_search_path'
C:\Users\Roland\AppData\Local\Temp\cabal-tmp-1788\haskell-gi-0.20.3\dist\build/libHShaskell-gi-0.20.3-4ylmwt0eEVy4Aeczi0KBpN.a(LibGIRepository.o):fake:(.text+0x2bee): undefined reference to `g_base_info_gtype_get_type'
C:\Users\Roland\AppData\Local\Temp\cabal-tmp-1788\haskell-gi-0.20.3\dist\build/libHShaskell-gi-0.20.3-4ylmwt0eEVy4Aeczi0KBpN.a(LibGIRepository.o):fake:(.text+0x2f2e): undefined reference to `g_irepository_find_by_name'
C:\Users\Roland\AppData\Local\Temp\cabal-tmp-1788\haskell-gi-0.20.3\dist\build/libHShaskell-gi-0.20.3-4ylmwt0eEVy4Aeczi0KBpN.a(LibGIRepository.o):fake:(.text+0x42c7): undefined reference to `g_struct_info_get_field'
C:\Users\Roland\AppData\Local\Temp\cabal-tmp-1788\haskell-gi-0.20.3\dist\build/libHShaskell-gi-0.20.3-4ylmwt0eEVy4Aeczi0KBpN.a(LibGIRepository.o):fake:(.text+0x460b): undefined reference to `g_struct_info_get_n_fields'
C:\Users\Roland\AppData\Local\Temp\cabal-tmp-1788\haskell-gi-0.20.3\dist\build/libHShaskell-gi-0.20.3-4ylmwt0eEVy4Aeczi0KBpN.a(LibGIRepository.o):fake:(.text+0x4775): undefined reference to `g_struct_info_get_size'
C:\Users\Roland\AppData\Local\Temp\cabal-tmp-1788\haskell-gi-0.20.3\dist\build/libHShaskell-gi-0.20.3-4ylmwt0eEVy4Aeczi0KBpN.a(LibGIRepository.o):fake:(.text+0x4aef): undefined reference to `g_union_info_get_field'
C:\Users\Roland\AppData\Local\Temp\cabal-tmp-1788\haskell-gi-0.20.3\dist\build/libHShaskell-gi-0.20.3-4ylmwt0eEVy4Aeczi0KBpN.a(LibGIRepository.o):fake:(.text+0x4e33): undefined reference to `g_union_info_get_n_fields'
C:\Users\Roland\AppData\Local\Temp\cabal-tmp-1788\haskell-gi-0.20.3\dist\build/libHShaskell-gi-0.20.3-4ylmwt0eEVy4Aeczi0KBpN.a(LibGIRepository.o):fake:(.text+0x4f9d): undefined reference to `g_union_info_get_size'
collect2.exe: error: ld returned 1 exit status
`gcc.exe' failed in phase `Linker'. (Exit code: 1)
cabal: Leaving directory 'C:\Users\Roland\AppData\Local\Temp\cabal-tmp-1788\haskell-gi-0.20.3'
cabal: Error: some packages failed to install:
haskell-gi-0.20.3 failed during the building phase. The exception was:
ExitFailure 1
Note
This undefined references are methods which are defined in .c/.h-files which are part of GObjects' gobject-introspection folder.
What have I tried so far?
Whilst installing Gtk2Hs and ffmpeg-light I was facing similar problems but I was able to get rid off by ..
- downloading the development-source-files and adding --extra-include-dir or --extra-lib-dir tags to the cabal installation
- adding linker flags (pkg-config --libs gobject-introspection-1.0) to the cabal settings
- downloading missing libraries and adding them to the PATH
- modifying .pc files (that are part of the package-config)
None of the options above worked with 'haskell-gi'. I also searched SO for related things but that didn't work too.
Question
Does anyone of you have an idea how to get over this problem? Any help appreciated.
