Hi Ben,
I've just pushed Repa 3 onto Hackage, which has a much better API than the older versions, and solves several code fusion problems.
when using the latest version of REPA with GHC 7.4.1, I have trouble building the repa-examples package: | Building repa-examples-3.0.0.1... | Preprocessing executable 'repa-volume' for repa-examples-3.0.0.1... | [1 of 1] Compiling Main ( examples/Volume/Main.hs, dist/build/repa-volume/repa-volume-tmp/Main.o ) | Linking dist/build/repa-volume/repa-volume ... | Preprocessing executable 'repa-sobel' for repa-examples-3.0.0.1... | [1 of 2] Compiling Solver ( examples/Sobel/src-repa/Solver.hs, dist/build/repa-sobel/repa-sobel-tmp/Solver.o ) | Loading package ghc-prim ... linking ... done. | Loading package integer-gmp ... linking ... done. | Loading package base ... linking ... done. | Loading package array-0.4.0.0 ... linking ... done. | Loading package bytestring-0.9.2.1 ... linking ... done. | Loading package deepseq-1.3.0.0 ... linking ... done. | Loading package containers-0.4.2.1 ... linking ... done. | Loading package binary-0.5.1.0 ... linking ... done. | Loading package bmp-1.2.1.1 ... linking ... done. | Loading package old-locale-1.0.0.4 ... linking ... done. | Loading package old-time-1.1.0.0 ... linking ... done. | Loading package extensible-exceptions-0.1.1.4 ... linking ... done. | Loading package time-1.4 ... linking ... done. | Loading package random-1.0.1.1 ... linking ... done. | Loading package pretty-1.1.1.0 ... linking ... done. | Loading package template-haskell ... linking ... done. | Loading package QuickCheck-2.4.2 ... linking ... done. | Loading package primitive-0.4.1 ... linking ... done. | Loading package vector-0.9.1 ... linking ... done. | Loading package repa-3.0.0.1 ... linking ... done. | Loading package repa-io-3.0.0.1 ... linking ... done. | Loading package repa-algorithms-3.0.0.1 ... linking ... done. | [2 of 2] Compiling Main ( examples/Sobel/src-repa/Main.hs, dist/build/repa-sobel/repa-sobel-tmp/Main.o ) | Linking dist/build/repa-sobel/repa-sobel ... | Preprocessing executable 'repa-mmult' for repa-examples-3.0.0.1... | | examples/MMult/src-repa/Main.hs:3:8: | Could not find module `Solver' | Use -v to see a list of the files searched for. When I attempt to use repa 3.1.x, the build won't even get past the configure stage, because Cabal refuses these dependencies. Is that a known problem, or am I doing something wrong? Take care, Peter