更新：
sudo port selfupdate没有返回任何错误。这是输出：
---> Updating MacPorts base sources using rsync
MacPorts base version 2.1.3 installed,
MacPorts base version 2.1.3 downloaded.
---> Updating the ports tree
---> MacPorts base is already the latest version
The ports tree has been updated. To upgrade your installed ports, you should run
port upgrade outdated
但是，当我运行时sudo port upgrade outdated，出现以下错误：
---> Configuring expat
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_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
运行sudo port upgrade gettext返回以下错误：
---> Configuring expat
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_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
原始问题：
我目前正在尝试dpkg在我的 Mac OS 10.7.5 上安装，所以我可以运行 theos sudo make package（它告诉我我不能这样做，因为dkpg没有安装）。
我按照这里的说明进行操作，但是在运行时遇到了问题sudo port install dpkg。这是错误：
---> Configuring expat
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_ports_textproc_expat/expat/main.log
Error: Unable to upgrade port: 1
Error: Unable to execute port: upgrade gettext failed
这是的内容main.log：
version:1
:debug:main expat has no conflicts
:debug:main Executing org.macports.main (expat)
:debug:main changing euid/egid - current euid: 0 - current egid: 0
:debug:main egid changed to: 501
:debug:main euid changed to: 502
:debug:main Skipping completed org.macports.archivefetch (expat)
:debug:main Privilege de-escalation not attempted as not running as root.
:debug:main Skipping completed org.macports.fetch (expat)
:debug:main Privilege de-escalation not attempted as not running as root.
:debug:main Skipping completed org.macports.checksum (expat)
:debug:main Privilege de-escalation not attempted as not running as root.
:debug:main Skipping completed org.macports.extract (expat)
:debug:main Privilege de-escalation not attempted as not running as root.
:debug:main Skipping completed org.macports.patch (expat)
:debug:main Privilege de-escalation not attempted as not running as root.
:debug:configure configure phase started at Wed Mar 13 14:55:32 CDT 2013
:notice:configure ---> Configuring expat
:debug:configure Using compiler 'Mac OS X clang'
:debug:configure Executing org.macports.configure (expat)
:debug:configure Environment: CPATH='/opt/local/include' CFLAGS='-pipe -O2 -arch x86_64' CPPFLAGS='-I/opt/local/include' CXXFLAGS='-pipe -O2 -arch x86_64' LIBRARY_PATH='/opt/local/lib' MACOSX_DEPLOYMENT_TARGET='10.7' CXX='/usr/bin/clang++' CC_PRINT_OPTIONS_FILE='/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_expat/expat/work/.CC_PRINT_OPTIONS' F90FLAGS='-pipe -O2 -m64' LDFLAGS='-L/opt/local/lib -arch x86_64' OBJC='/usr/bin/clang' FCFLAGS='-pipe -O2 -m64' INSTALL='/usr/bin/install -c' OBJCFLAGS='-pipe -O2 -arch x86_64' FFLAGS='-pipe -O2 -m64' CC_PRINT_OPTIONS='YES' CC='/usr/bin/clang'
:debug:configure Assembled command: 'cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_expat/expat/work/expat-2.1.0" && ./configure --prefix=/opt/local'
:debug:configure Executing command line: cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_expat/expat/work/expat-2.1.0" && ./configure --prefix=/opt/local
:info:configure sh: line 0: cd: /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_expat/expat/work/expat-2.1.0: No such file or directory
:info:configure Command failed: cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_expat/expat/work/expat-2.1.0" && ./configure --prefix=/opt/local
:info:configure Exit code: 1
:error:configure org.macports.configure for port expat returned: configure failure: command execution failed
:debug:configure Error code: NONE
:debug:configure Backtrace: configure failure: command execution failed
while executing
"$procedure $targetname"
:info:configure Warning: targets not executed for expat: org.macports.install org.macports.configure org.macports.build org.macports.destroot
:notice:configure Please see the log file for port expat for details:
/opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_ports_textproc_expat/expat/main.log
谁能帮我dpkg安装？我完全不知道问题是什么。