ghc

I am having an issue with building a shared library with ghc and I think I need to rebuild my haskell packages with --enable-shared, is there an easy way to rebuild all of my packages with cabal with the flag --enable-shared? If you have a ~/.cabal/world, cabal install --reinstall --enable-shared world could work, but test with the --dry-run flag first. That will, however only take care of cabal-installed packages. If you have packages installed with your distro's package manager, the distro might also provide shared versions for those (otherwise, you'd have to do it manually). Also, it would

I have been trying to get some basic dynamic code compilation working using the GHC API by following a tutorial found here . This code: import GHC import GHC.Paths import DynFlags import Unsafe.Coerce main :: IO () main = defaultErrorHandler defaultDynFlags $ do func <- runGhc (Just libdir) $ do dflags <- getSessionDynFlags setSessionDynFlags dflags target <- guessTarget "Test.hs" Nothing addTarget target r <- load LoadAllTargets case r of Failed -> error "Compilation failed" Succeeded -> do m <- findModule (mkModuleName "Test") Nothing setContext [] [m] value <- compileExpr ("Test.print") do

I installed Haskell Platform 7.10.3 on my mac and when it finished it said that it had detected older versions of GHC and to uninstall them, but how do I do that? I'm using a macbook air with OS X 10.11.3. You can uninstall prior platforms by running uninstall-hs from the command line. You'll get an output like: -- Versions found on this system 7.10.3 -- To remove a version and all earlier: uninstall-hs thru VERSION -- To remove only a single version: uninstall-hs only VERSION And you can proceed from there... 来源： https://stackoverflow.com/questions/37034915/how-do-i-uninstall-older-versions

I get the following error when trying to compile $ ghc --make -O2 -Wall -fforce-recomp [1 of 1] Compiling Main ( isPrimeSmart.hs, isPrimeSmart.o ) SpecConstr Function `$wa{v s2we} [lid]' has two call patterns, but the limit is 1 Use -fspec-constr-count=n to set the bound Use -dppr-debug to see specialisations Linking isPrimeSmart ... My code is: {-# OPTIONS_GHC -O2 -optc-O2 #-} import qualified Data.ByteString.Lazy.Char8 as StrL -- StrL is STRing Library import Data.List -- read in a file. First line tells how many cases. Each case is on a separate -- line with the lower an upper bounds

Newtypes are often used to change the behavior of certain types when used in certain class contexts. For example, one would use the Data.Monoid.All wrapper to change the behavior of Bool when used as a Monoid . I'm currently writing such a newtype wrapper that would apply to a large range of different types. The wrapper is supposed to change the behavior of one specific class instance. It might look like this: newtype Wrapper a = Wrapper a instance Special a => Special (Wrapper a) where -- ... However, adding this wrapper will often change the usability of the wrapped type. For example, if I

I am using Debian/MIPS+QEMU to build MIPS ports of PortFusion (a TCP tunneling solution). The resulting binaries are linked against GNU libc. Thus, they cannot be just copied over and used on vanilla OpenWrt which ships with uclibc instead of eglibc (which seems binary-compatible with GNU libc). Is there a way to link Haskell/GHC binaries on Debian/MIPS against uclibc instead of eglibc ? Can OpenWrt's using uclibc be really the reason why PortFusion binaries copied over from Debian fail to run with -ash: binary not found or can this message be due to something entirely else? See https://github