无法安装 gtk-mac-integration

Question

我不明白这个错误，因为它似乎需要我尝试安装的同一软件包的版本。

$ cabal install gtk-mac-integration
Resolving dependencies...
[1 of 2] Compiling SetupWrapper     ( /var/folders/cU/cUDMo9+9Gl817+j+h1DAvk+++TI/-Tmp-/gtk-mac-integration-0.1.0.46479/gtk-mac-integration-0.1.0.4/SetupWrapper.hs, /var/folders/cU/cUDMo9+9Gl817+j+h1DAvk+++TI/-Tmp-/gtk-mac-integration-0.1.0.46479/gtk-mac-integration-0.1.0.4/dist/setup/SetupWrapper.o )
[2 of 2] Compiling Main             ( /var/folders/cU/cUDMo9+9Gl817+j+h1DAvk+++TI/-Tmp-/gtk-mac-integration-0.1.0.46479/gtk-mac-integration-0.1.0.4/Setup.hs, /var/folders/cU/cUDMo9+9Gl817+j+h1DAvk+++TI/-Tmp-/gtk-mac-integration-0.1.0.46479/gtk-mac-integration-0.1.0.4/dist/setup/Main.o )
Linking /var/folders/cU/cUDMo9+9Gl817+j+h1DAvk+++TI/-Tmp-/gtk-mac-integration-0.1.0.46479/gtk-mac-integration-0.1.0.4/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 ...
Configuring gtk-mac-integration-0.1.0.4...
setup: The pkg-config package gtk-mac-integration version >=0.9.6 is required
but it could not be found.
cabal: Error: some packages failed to install:
gtk-mac-integration-0.1.0.4 failed during the configure step. The exception
was:
ExitFailure 1

Answer 1

它不想要 Haskell 包 gtk-mac-integration，它想要 system 包 gtk-mac-integration。也就是说，您尝试安装的 Haskell 包只是绑定到 gtk-mac-integration 库（我认为它与 GTK+ 捆绑在一起）；您必须先单独安装它，然后才能安装 Haskell 包。

如果你已经安装了GTK+，那么问题是Cabal用来查找外部库依赖的pkg-config工具找不到库对应的.pc文件。不过，我不知道如何解决这个问题；至少不是没有更多细节。