我正在努力cabal install fay fay-base。但是失败了，这是日志：
$ cabal install fay fay-base
Resolving dependencies...
Configuring pretty-show-1.6.3...
Building pretty-show-1.6.3...
Preprocessing library pretty-show-1.6.3...
[1 of 6] Compiling Paths_pretty_show ( dist/build/autogen/Paths_pretty_show.hs, dist/build/Paths_pretty_show.o )
[2 of 6] Compiling Text.Show.Value ( Text/Show/Value.hs, dist/build/Text/Show/Value.o )
[3 of 6] Compiling Text.Show.PrettyVal ( Text/Show/PrettyVal.hs, dist/build/Text/Show/PrettyVal.o )
[4 of 6] Compiling Text.Show.Html ( Text/Show/Html.hs, dist/build/Text/Show/Html.o )
Text/Show/Html.hs:106:1: Warning: Defined but not used: `tallTuple'
[5 of 6] Compiling Text.Show.Parser ( dist/build/Text/Show/Parser.hs, dist/build/Text/Show/Parser.o )
[6 of 6] Compiling Text.Show.Pretty ( Text/Show/Pretty.hs, dist/build/Text/Show/Pretty.o )
[1 of 6] Compiling Paths_pretty_show ( dist/build/autogen/Paths_pretty_show.hs, dist/build/Paths_pretty_show.p_o )
clang: warning: argument unused during compilation: '-nodefaultlibs'
[2 of 6] Compiling Text.Show.Value ( Text/Show/Value.hs, dist/build/Text/Show/Value.p_o )
clang: warning: argument unused during compilation: '-nodefaultlibs'
[3 of 6] Compiling Text.Show.PrettyVal ( Text/Show/PrettyVal.hs, dist/build/Text/Show/PrettyVal.p_o )
clang: warning: argument unused during compilation: '-nodefaultlibs'
[4 of 6] Compiling Text.Show.Html ( Text/Show/Html.hs, dist/build/Text/Show/Html.p_o )
Text/Show/Html.hs:106:1: Warning: Defined but not used: `tallTuple'
clang: warning: argument unused during compilation: '-nodefaultlibs'
[5 of 6] Compiling Text.Show.Parser ( dist/build/Text/Show/Parser.hs, dist/build/Text/Show/Parser.p_o )
clang: warning: argument unused during compilation: '-nodefaultlibs'
[6 of 6] Compiling Text.Show.Pretty ( Text/Show/Pretty.hs, dist/build/Text/Show/Pretty.p_o )
clang: warning: argument unused during compilation: '-nodefaultlibs'
In-place registering pretty-show-1.6.3...
Preprocessing executable 'ppsh' for pretty-show-1.6.3...
[1 of 1] Compiling Main ( bin/ppsh.hs, dist/build/ppsh/ppsh-tmp/Main.o )
Linking dist/build/ppsh/ppsh ...
Running Haddock for pretty-show-1.6.3...
Preprocessing library pretty-show-1.6.3...
Haddock coverage:
0% ( 0 / 8) in 'Paths_pretty_show'
100% ( 3 / 3) in 'Text.Show.Value'
50% ( 1 / 2) in 'Text.Show.PrettyVal'
dist/build/tmp-6355/Text/Show/Html.hs:106:1: Warning:
Defined but not used: `tallTuple'
71% ( 5 / 7) in 'Text.Show.Html'
0% ( 0 / 2) in 'Text.Show.Parser'
81% ( 21 / 26) in 'Text.Show.Pretty'
Documentation created: dist/doc/html/pretty-show/index.html
Preprocessing executable 'ppsh' for pretty-show-1.6.3...
Installing library in
/Users/arthurfayzrakhmanov/Library/Haskell/ghc-7.6.3/lib/pretty-show-1.6.3/lib
Installing executable(s) in
/Users/arthurfayzrakhmanov/Library/Haskell/ghc-7.6.3/lib/pretty-show-1.6.3/bin
Warning: The directory
/Users/arthurfayzrakhmanov/Library/Haskell/ghc-7.6.3/lib/pretty-show-1.6.3/bin
is not in the system search path.
Registering pretty-show-1.6.3...
Installed pretty-show-1.6.3
Configuring type-eq-0.4...
Building type-eq-0.4...
Preprocessing library type-eq-0.4...
[1 of 7] Compiling Type.Eq.Higher[boot] ( Type/Eq/Higher.hs-boot, dist/build/Type/Eq/Higher.o-boot )
[2 of 7] Compiling Type.Eq[boot] ( Type/Eq.hs-boot, dist/build/Type/Eq.o-boot )
[3 of 7] Compiling Type.Eq.Unsafe ( Type/Eq/Unsafe.hs, dist/build/Type/Eq/Unsafe.o )
[4 of 7] Compiling Type.Eq.Higher.Unsafe ( Type/Eq/Higher/Unsafe.hs, dist/build/Type/Eq/Higher/Unsafe.o )
[5 of 7] Compiling Type.Eq ( Type/Eq.hs, dist/build/Type/Eq.o )
[6 of 7] Compiling Type.Eq.Higher ( Type/Eq/Higher.hs, dist/build/Type/Eq/Higher.o )
Type/Eq/Higher.hs:72:86:
Illegal literal in type (use -XDataKinds to enable): 1
Failed to install type-eq-0.4
Updating documentation index
/Users/arthurfayzrakhmanov/Library/Haskell/doc/index.html
cabal: Error: some packages failed to install:
fay-0.18.1.3 depends on type-eq-0.4 which failed to install.
fay-base-0.18.0.0 depends on type-eq-0.4 which failed to install.
haskell-names-0.3.2.4 depends on type-eq-0.4 which failed to install.
type-eq-0.4 failed during the building phase. The exception was:
ExitFailure 1
请帮忙。
最终，我这样做是这样的：
sudo /Library/Haskell/bin/uninstall-hs（https://stackoverflow.com/a/6996284/1749901）卸载了整个平台brew install apple-gcc42brew link apple-gcc42brew install haskell-platformcabal updatecabal install cabal-install$HOME/.cabal/bin（而不是$HOME/Library/Haskell/bin在从此处通过PKG安装程序通过平台安装平台的情况下，显然是因为brew配置略有不同）。source ~/.bash_profile，然后重新启动终端，因此which cabal指向<HOME>/.cabal/bin/cabal，并cabal --version显示1.18（而不是1.16）。cabal install happy。此时，我又重新启动了终端，因为它which happy指向的是本地更新（1.19.2）版本，但happy --version显示为1.16.x。cabal install type-eq- SUCCEEDED第一次！最后，cabal install fay fay-base- SUCCEEDED！
Installed fay-0.18.1.3
Installed fay-base-0.18.0.0
！谢谢你们！
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我来说两句