我已经安装了gtk2hs-buildtools没有问题，但是当我尝试使用'cabal install gtk'安装gtk时，这是输出：
[gautam@gautam ~]$ cabal install gtk Resolving dependencies... [1 of 2] Compiling SetupWrapper ( /tmp/cairo-0.12.213784/cairo-0.12.2/SetupWrapper.hs, /tmp/cairo-0.12.213784/cairo-0.12.2/dist/setup/SetupWrapper.o ) [2 of 2] Compiling Main ( /tmp/cairo-0.12.213784/cairo-0.12.2/Setup.hs, /tmp/cairo-0.12.213784/cairo-0.12.2/dist/setup/Main.o ) Linking /tmp/cairo-0.12.213784/cairo-0.12.2/dist/setup/setup ... [1 of 2] Compiling Gtk2HsSetup ( Gtk2HsSetup.hs, dist/setup-wrapper/Gtk2HsSetup.o ) [2 of 2] Compiling Main ( SetupMain.hs, dist/setup-wrapper/Main.o ) Linking dist/setup-wrapper/setup ... Cannot find gtk2hsC2hs Please install `gtk2hs-buildtools` first and check that the install directory is in your PATH (e.g. HOME/.cabal/bin). [1 of 2] Compiling SetupWrapper ( /tmp/glib-0.12.213784/glib-0.12.2/SetupWrapper.hs, /tmp/glib-0.12.213784/glib-0.12.2/dist/setup/SetupWrapper.o ) [2 of 2] Compiling Main ( /tmp/glib-0.12.213784/glib-0.12.2/Setup.hs, /tmp/glib-0.12.213784/glib-0.12.2/dist/setup/Main.o ) Linking /tmp/glib-0.12.213784/glib-0.12.2/dist/setup/setup ... [1 of 2] Compiling Gtk2HsSetup ( Gtk2HsSetup.hs, dist/setup-wrapper/Gtk2HsSetup.o ) [2 of 2] Compiling Main ( SetupMain.hs, dist/setup-wrapper/Main.o ) Linking dist/setup-wrapper/setup ... Cannot find gtk2hsC2hs Please install `gtk2hs-buildtools` first and check that the install directory is in your PATH (e.g. HOME/.cabal/bin). cabal: Error: some packages failed to install: cairo-0.12.2 failed during the configure step. The exception was: ExitFailure 1 gio-0.12.2 depends on glib-0.12.2 which failed to install. glib-0.12.2 failed during the configure step. The exception was: ExitFailure 1 gtk-0.12.2 depends on glib-0.12.2 which failed to install. pango-0.12.2 depends on glib-0.12.2 which failed to install. [gautam@gautam ~]$
我的Mac和Fedora VM都会出现此问题。有人知道如何解决这个问题吗？谢谢！
答案 0 :(得分：10)
您需要将Gtk2Hs构建工具存储的路径添加到$PATH环境变量中，以便构建过程可以找到它们。在Linux上，它是$HOME/.cabal/bin。在OS X上，它是$HOME/Library/Haskell/bin（尽管可能只是在您使用Haskell平台时 - 如果这不起作用，请尝试$HOME/.cabal/bin）。
要向$PATH添加目录，请运行export PATH=directory:$PATH。您应该将其添加到shell的启动文件中（这取决于您的shell和操作系统 - 可能是~/.bashrc，~/.profile或~/.bash_profile）。 （如果您想直接运行使用cabal安装的任何程序，则需要这样做。）