Get Haskell programs to assume a UTF8 locale under wine

Question

I am trying to use GHC on wine to build one of my Haskell applications for windows. So far, this works well, but I am stuck running my test suite, which is intended to be run in an UTF8-locale (LANG=C.utf8 for example.)

Unfortunately, under wine, the Haskell runtime always believes I want to use a non-unicode codepage:

$ wine ghc -e 'GHC.IO.Encoding.CodePage.localeEncoding'
CP850
$ LANG=C.utf8 wine ghc -e 'GHC.IO.Encoding.CodePage.localeEncoding'
CP437
$ LC_ALL=C.utf8 wine ghc -e 'GHC.IO.Encoding.CodePage.localeEncoding'
CP437

Besides changing the actual code to set the encoding of all handles: How would I make the Haskell program use UTF-8 (i.e. codepage 65001) here?

You may find this alternative way to set environment variables helpful. If, that is, the environment has anything to do with it. https://www.winehq.org/docs/wineusr-guide/environment-variables — dfeuer, Oct 15 '15 at 19:33
I have no reason to believe that environment variables influence the codepage – unfortunately. — Joachim Breitner, Oct 15 '15 at 19:34
Also, have you tried the stronger `LC_ALL` instead of `LANG`? I'm just throwing out guesses here. — dfeuer, Oct 15 '15 at 19:36
Would running the test suite through a Windows batch file that sets the codepage help? — Ørjan Johansen, Oct 15 '15 at 21:39
@ØrjanJohansen: Possibly, but how do I set it? `chcp` is not available in WINE, as far as I can tell. — Joachim Breitner, Oct 16 '15 at 10:42
Oh. Then I don't know either. I found one small thing: [Wine docs recommend](http://wiki.winehq.org/TestingLanguages) always spelling the suffix in the official form `UTF-8`. — Ørjan Johansen, Oct 16 '15 at 15:36

dfeuer · Answer 1 · 2015-10-15T19:52:27.567

2

I don't have a Wine/Haskell setup here, so take this with many grains of salt. It looks GHC.IO.Encoding has what might be the right pieces for this:

setLocaleEncoding :: TextEncoding -> IO () 
utf8 :: TextEncoding

You could try making your test programs setLocaleEncoding utf8 before they get going. This isn't quite what you wanted, but if it works it seems easier than setting it separately for each handle.

edited Oct 15 '15 at 19:52

answered Oct 15 '15 at 19:46

dfeuer

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Thanks. I’d really like something that does not modify the code, so that I’m able to test the program as if it was running on the users’ machine with utf8 enabled. I’ll keep searching. – Joachim Breitner Oct 15 '15 at 21:06

score 0 · Answer 2 · answered Oct 16 '15 at 08:39

0

I don't know if this works for Wine, but have you tried using the CHCP command to set the current Windows code page?

answered Oct 16 '15 at 08:39

MathematicalOrchid

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That is what I recommend my users on real windows. Unfortunately, that command is not available in WINE. – Joachim Breitner Oct 16 '15 at 10:41
Pity... Oh well, was worth a try! – MathematicalOrchid Oct 16 '15 at 10:46

Get Haskell programs to assume a UTF8 locale under wine

2 Answers2