GHC cabal install hamlet 失败并出现一个模糊的错误

Question

我正在尝试在 webfaction 共享服务器上安装一个 Hamlet，这样我就可以在那里编译和运行我的 web 应用程序。 我正在使用 Yesod 开发应用程序。

我设法从源代码编译 GHC 7 并引导 cabal 安装。 接下来我做了cabal install hamlet并希望它能够工作。 没运气！

我从 cabal/GHC 收到以下奇怪的错误消息。 谁能帮帮我？

$ cabal install hamlet                       Resolving dependencies...
Configuring hamlet-0.8.2...
Preprocessing library hamlet-0.8.2...
Building hamlet-0.8.2...
[ 1 of 14] Compiling Text.MkSizeType  ( Text/MkSizeType.hs, dist/build/Text/MkSizeType.o )
[ 2 of 14] Compiling Text.Shakespeare ( Text/Shakespeare.hs, dist/build/Text/Shakespeare.o )
[ 3 of 14] Compiling Text.Hamlet.Parse ( Text/Hamlet/Parse.hs, dist/build/Text/Hamlet/Parse.o )

Text/Hamlet/Parse.hs:113:13:
    Warning: A do-notation statement discarded a result of type String.
         Suppress this warning by saying "_ <- ($) try string "!--"",
         or by using the flag -fno-warn-unused-do-bind
[ 4 of 14] Compiling Text.Hamlet.Quasi ( Text/Hamlet/Quasi.hs, dist/build/Text/Hamlet/Quasi.o )
[ 5 of 14] Compiling Text.Css         ( Text/Css.hs, dist/build/Text/Css.o )
[ 6 of 14] Compiling Text.Cassius     ( Text/Cassius.hs, dist/build/Text/Cassius.o )
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
Loading package array-0.3.0.2 ... linking ... done.
Loading package containers-0.4.0.0 ... linking ... done.
Loading package pretty-1.0.1.2 ... linking ... done.
Loading package template-haskell ... linking ... done.
Loading package filepath-1.2.0.0 ... linking ... done.
Loading package old-locale-1.0.0.2 ... linking ... done.
Loading package old-time-1.0.0.6 ... linking ... done.
Loading package unix-2.4.2.0 ... linking ... done.
Loading package directory-1.1.0.0 ... linking ... done.
Loading package process-1.0.1.5 ... linking ... done.
Loading package bytestring-0.9.1.10 ... linking ... done.
Loading package transformers-0.2.2.0 ... linking ... done.
Loading package mtl-2.0.1.0 ... linking ... done.
Loading package parsec-3.1.1 ... linking ... done.
Loading package failure-0.1.0.1 ... linking ... done.
Loading package deepseq-1.1.0.2 ... linking ... done.
Loading package text-0.11.0.8 ... linking ... done.
Loading package blaze-builder-0.3.0.1 ... linking ... done.
Loading package blaze-html-0.4.1.1 ... linking ... done.
Loading package ffi-1.0 ... linking ... done.
ghc: mmap 36864 bytes at (nil): Operation not permitted
ghc: Try specifying an address with +RTS -xm<addr> -RTS
cabal: Error: some packages failed to install:
hamlet-0.8.2 failed during the building phase. The exception was:
ExitFailure 1

Answer 1

好的，我似乎已经解决了这个问题，并在这里注意到它，希望它可以帮助其他人。

问题是 webfaction 不允许您执行存储在 /tmp 中的文件。 来自 cabal 的错误消息非常令人困惑。

修复方法是在运行 cabal install 之前将环境变量设置为主路径中的目录（没有此类限制）。 我只是创建了一个别名 -

alias cabalinstall='export TMPDIR=~/tmp; cabal install'

这可以确保在尝试安装任何 cabal package 之前正确设置 tmpdir。