提问
我成功创建了Yesod应用程序(使用cabal-dev)并启动了它.但是我一直试图将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”之后,我总是始终收到以下错误消息：
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.
我不知道这是怎么回事.
