On 2/8/13, Stephen Paul Weber
Somebody claiming to be Christopher Vollick wrote:
On Fri, Feb 08, 2013 at 01:20:53PM +0100, Gabor Greif wrote:
libraries/base/Foreign/C/Types.hs:162:72: No instance for (Fractional Int32) arising from the 'deriving' clause of a data type declaration Possible fix: use a standalone 'deriving instance' declaration, so you can specify the instance context yourself When deriving the instance for (Fractional CFloat)
Has anybody seen this with HEAD?
This may be a side effect of the fix for http://hackage.haskell.org/trac/ghc/ticket/7569
Yeah, something with the test that contains the literal double 1.4 When configure runs, it does not succeed to set HTYPE_IS_INTEGRAL to "" and this leads it down the signed/unsigned road. Will check tomorrow what is going on here. Possibly we need to change the test to C++, where compile-time detection of these things is a breeze (because of overloading). Cheers and thanks, Gabor
-- Stephen Paul Weber, @singpolyma See http://singpolyma.net for how I prefer to be contacted edition right joseph
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