On 18/05/2011 2:02 PM, Ville Tirronen wrote:
Hello,
I have successfully* built HOpenCV on windows with openCV 2.0 on windows
(XP).
* by successfully, I mean compiled and linked, library and test.hs. The
test did give
me an error:
test-hopencv.exe: user error (Failed to create camera)
which, I have not bothered to follow up any further.
The build process was as follows (your paths will differ):
1) I installed openCV to C:\apps\OpenCV2.0
2) I unzipped HOpenCV-0.1.2.2 to some directory
3) edited cabal file
edited the following entries to
include-dirs: c:\apps\OpenCV2.0\include\opencv
extra-lib-dirs: c:\apps\OpenCV2.0\lib
and also edited the extra-libraries to ...
extra-libraries: highgui200, cv200, cxcore200
4) then
set Path=%PATH%;c:\apps\OpenCV2.0\bin
unless when installing OpenCV you added the install path to your path..
5) then
ghc Setup build "--hsc2hs-options=-L -Wl,-("
the "--hsc2hs-options=-L -Wl,-(" option is neccessary in order to ovoid
errors like
dist\ghc\6.12.3\build\AI\CV\OpenCV\CV_hsc_make.o:CV_hsc_make.c:(.text+0x85a):
un
defined reference to `cvFree_'
for some reason (and I really can't understand why) gcc requires the
highgui200, cv200, cxcore200
libraries after the object (normally dosn't) and the "-L -Wl,-("
instructs hsc2hs to pass -Wl,-C
to gcc, which in turn instructs gcc to pas -( to the linker which in
turn tells the linker
to re-read the libraries to resolve the references. (somewhere something
is going wrong)
6) run the test ...
Hi,
Yes, I understand that - but if there is some install or usage dependency,
or install procedure, I would hope to see it documented somewhere; perhaps I
missed that?
The only installation procedure I can document is how to do this in linux.
My guess is that it must be similar with windows.
1. Get the opencv library from opencv.willowgarage.com
2. Install it and make a note where it installs
3. cabal install CV. If this fails with missing C libraries, then,
(4). cabal install CV --with-extra-lib-dirs=where_the_opencv_libs_are
--with-extra-include-dirs=where_the_opencv_includes_are
However, wait few hours so I can push a new version to hackage. There are
few things I've already discovered that fail to work with other people and I
think I can fix them.
Disclaimer:
The CV package is something I threw together, originally in pre-cabal times.
Back then I arguably wasn't a very good haskell-programmer and the whole
thing was under an nda. Since then I've casually evolved the library to suit
my needs. After I saw CV-combinators library released I made a petition to
publish my codes in hopes that it would help other people doing similar
things.
In short, although CV package is very very useful for me, it is not a
perfect binding, and the implementation isn't really smart at places. I
would like to make it great, however.
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