在 Yesod 上安装 mysql

Question

我成功创建了一个 Yesod 应用程序（使用 cabal-dev）并启动它。 但是我一直在尝试将mysql与yesod一起使用，但是在运行命令“ cabal-dev install yesod-platform, cabal-dev install yesod-bin; cabal-dev install ”后总是不断收到以下错误消息：

 Installed yesod-1.2.2.1
 cabal: Error: some packages failed to install:
 Youne-0.0.0 depends on pcre-light-0.4 which failed to install.
 mysql-0.1.1.5 failed during the configure step. The exception was:
 ExitFailure 1
 mysql-simple-0.2.2.4 depends on pcre-light-0.4 which failed to install.
 pcre-light-0.4 failed during the configure step. The exception was:
 ExitFailure 1
 persistent-mysql-1.2.1 depends on pcre-light-0.4 which failed to install.

我不知道发生了什么。

Answer 1

安装 pcre-light 时出现问题，很可能是由于缺少系统库。尝试仅运行 cabal install pcre-light-0.4 并查看该输出是否更有帮助。