I think this is an opengl version problem. I came across this error in vacuum-opengl after I had upgraded my opengl. I patched it up using a "from<numeric type>" call. On Mon, Sep 28, 2009 at 8:00 AM, selahaddin gerdan wrote:

Hi there, when I try to install frag,I get this error:

.cabal/bin/cabal install frag Resolving dependencies... Downloading frag-1.1.2... Configuring frag-1.1.2... Preprocessing executables for frag-1.1.2... Building frag-1.1.2... [ 1 of 39] Compiling IdentityList     ( src/IdentityList.hs, dist/build/frag/frag-tmp/ IdentityList.o ) [ 2 of 39] Compiling Quaternion       ( src/Quaternion.hs, dist/build/frag/frag-tmp/Quaternion.o )

src/Quaternion.hs:22:27:     Couldn't match expected type `GLfloat'            against inferred type `Float'     In the expression: (r00 :: GLfloat)     In the second argument of `newMatrix', namely         `[(r00 :: GLfloat), r01, r02, r03, ....]'     In the expression:         newMatrix ColumnMajor [(r00 :: GLfloat), r01, r02, r03, ....] cabal: Error: some packages failed to install: frag-1.1.2 failed during the building phase. The exception was: exit: ExitFailure 1

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