GHCi下的动态加载
GHCi下的动态加载
提问于 2013-12-05 16:37:03
我需要能够动态加载Haskell模块，并在动态加载模块的上下文中计算表达式。
Hint做到了；问题是，它不能在GHCi下工作，至少在Windows上是不能工作的。
cygwin-bash> ghci HintTest.hs
GHCi, version 7.6.3: http://www.haskell.org/ghc/ :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
Ok, modules loaded: Main.
Prelude Main>
Prelude Main> main
[... lots of "Loading package" messages snipped]
GHCi runtime linker: fatal error: I found a duplicate definition for symbol
_debugLn
whilst processing object file
C:\PROGRAM FILES (X86)\HASKELL PLATFORM\2013.2.0.0\lib\ghc-prim-0.3.0.0\HSghc-prim-0.3.0.0.o
This could be caused by:
* Loading two different object files which export the same symbol
* Specifying the same object file twice on the GHCi command line
* An incorrect `package.conf' entry, causing some object to be
loaded twice.
GHCi cannot safely continue in this situation. Exiting now. Sorry.当我直接使用GHC模块时，我得到了同样的错误，如GHC/As a library所示。
作为一个编译过的程序，HintTest运行得很好。
对此有什么可以做的吗？
我不需要单独运行我的程序；总是使用GHCi就足够了。如果程序可以使用GHCi本身作为解释器，而不是它自己的GHC副本，那就更好了。也就是说，我希望能够做这样的事情：
do
context <- loadToGhci "MyModule.hs"
inContext context "MyModule.myFunction 2 5"当我返回到REPL时，MyModule被神奇地加载到其中。context应该是某种承载GHCi状态的monad。
Linux更新同样的代码可以在上运行。可能是GHC中特定于Windows的错误。它能被解决吗？
更新2这里是完整的日志
Prelude Main> main
Loading package array-0.4.0.1 ... linking ... done.
Loading package deepseq-1.3.0.1 ... linking ... done.
Loading package bytestring-0.10.0.2 ... linking ... done.
Loading package Win32-2.3.0.0 ... linking ... done.
Loading package transformers-0.3.0.0 ... linking ... done.
Loading package old-locale-1.0.0.5 ... linking ... done.
Loading package time-1.4.0.1 ... linking ... done.
Loading package syb-0.4.0 ... linking ... done.
Loading package random-1.0.1.1 ... linking ... done.
Loading package filepath-1.3.0.1 ... linking ... done.
Loading package directory-1.2.0.1 ... linking ... done.
Loading package process-1.1.0.2 ... linking ... done.
Loading package pretty-1.1.1.0 ... linking ... done.
Loading package mtl-2.1.2 ... linking ... done.
Loading package containers-0.5.0.0 ... linking ... done.
Loading package hpc-0.6.0.0 ... linking ... done.
Loading package hoopl-3.9.0.0 ... linking ... done.
Loading package haskell-src-1.0.1.5 ... linking ... done.
Loading package old-time-1.1.0.1 ... linking ... done.
Loading package Cabal-1.16.0 ... linking ... done.
Loading package binary-0.5.1.1 ... linking ... done.
Loading package bin-package-db-0.0.0.0 ... linking ... done.
Loading package template-haskell ... linking ... done.
Loading package ghc-7.6.3 ... linking ... done.
Loading package extensible-exceptions-0.1.1.4 ... linking ... done.
Loading package MonadCatchIO-mtl-0.3.0.5 ... linking ... done.
Loading package ghc-mtl-1.0.1.2 ... linking ... done.
Loading package ghc-paths-0.1.0.9 ... linking ... done.
Loading package utf8-string-0.3.7 ... linking ... done.
Loading package hint-0.3.3.7 ... linking ... done.
GHCi runtime linker: fatal error: I found a duplicate definition for symbol
_debugLn
whilst processing object file
C:\PROGRAM FILES (X86)\HASKELL PLATFORM\2013.2.0.0\lib\ghc-prim-0.3.0.0\HSghc-prim-0.3.0.0.o
This could be caused by:
* Loading two different object files which export the same symbol
* Specifying the same object file twice on the GHCi command line
* An incorrect `package.conf' entry, causing some object to be
loaded twice.
GHCi cannot safely continue in this situation. Exiting now. Sorry.页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/20395127
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