自从 MacBook Pro 升级到 Mavericks 之后，还没有用过 port 来更新软件。今天刚好需要安装 tmux 所以执行了 sudo port upgrade outdated 来更新所有已经过期的软件包，却发现居然报错： ---> Configuring expat Error: Failed to configure expat, consult /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_textproc_expat/expat/work/expat-2.1.0/config.log Error: org.macports.configure for port expat returned: configure failure: command execution failed Please see the log file for port expat for details: /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_textproc_expat/expat/main.log Error: Unable to upgrade port: 1 To report a bug, follow the instructions in the guide: http://guide.macports.org/#project.tickets 谷歌了之后看到有人说需要 用 XCode 安装 developer library ，于是照做了一下，貌似没什么用，病症还是在升级到了 OSX 10.9 之后遇到了问题，我仔细查看了日志后发现是与 C 编译器有关的： error: C compiler cannot create executables 貌似强大的 clang 无法找到 stdio.h ，...