Macos Macports安装错误

我正在使用macports安装Valgrind，出现以下错误：

--->  Computing dependencies for valgrind
--->  Building valgrind
Error: org.macports.build for port valgrind returned: command execution failed
Please see the log file for port valgrind for details:
    /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_valgrind/valgrind/main.log
To report a bug, follow the instructions in the guide:
    http://guide.macports.org/#project.tickets
Error: Processing of port valgrind failed

以下是日志文件：

:notice:build --->  Building valgrind
:debug:build Executing org.macports.build (valgrind)
:debug:build Environment: CPATH='/opt/local/include' CC_PRINT_OPTIONS_FILE='/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_valgrind/valgrind/work/.CC_PRINT_OPTIONS' LIBRARY_PATH='/opt/local/lib' CC_PRINT_OPTIONS='YES' MACOSX_DEPLOYMENT_TARGET='10.8'
:debug:build Assembled command: 'cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_valgrind/valgrind/work/valgrind-3.8.1" && /usr/bin/make -w all'
:debug:build Executing command line:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_valgrind/valgrind/work/valgrind-3.8.1" && /usr/bin/make -w all 
:info:build make: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_valgrind/valgrind/work/valgrind-3.8.1'
:info:build /usr/bin/make  all-recursive
:info:build make[1]: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_valgrind/valgrind/work/valgrind-3.8.1'
:info:build Making all in include
:info:build make[2]: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_valgrind/valgrind/work/valgrind-3.8.1/include'
:info:build make[2]: Nothing to be done for `all'.
:info:build make[2]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_valgrind/valgrind/work/valgrind-3.8.1/include'
:info:build Making all in VEX
:info:build make[2]: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_valgrind/valgrind/work/valgrind-3.8.1/VEX'
:info:build /usr/bin/make  all-am
:info:build make[3]: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_valgrind/valgrind/work/valgrind-3.8.1/VEX'
:info:build make[3]: Nothing to be done for `all-am'.
:info:build make[3]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_valgrind/valgrind/work/valgrind-3.8.1/VEX'
:info:build make[2]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_valgrind/valgrind/work/valgrind-3.8.1/VEX'
:info:build Making all in coregrind
:info:build make[2]: Entering directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_valgrind/valgrind/work/valgrind-3.8.1/coregrind'
:info:build (cd m_mach && mig /usr/include/mach/mach_vm.defs /usr/include/mach/task.defs /usr/include/mach/thread_act.defs /usr/include/mach/vm_map.defs)
:info:build 
:info:build You have not agreed to the Xcode license agreements, please run 'xcodebuild -license' (for user-level acceptance) or 'sudo xcodebuild -license' (for system-wide acceptance) from within a Terminal window to review and agree to the Xcode license agreements.
:info:build /usr/bin/mig: line 174: : command not found
:info:build mig: fatal: "<no name yet>", line -1: no SubSystem declaration
:info:build make[2]: *** [m_mach/mach_vmUser.c] Error 1
:info:build make[2]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_valgrind/valgrind/work/valgrind-3.8.1/coregrind'
:info:build make[1]: *** [all-recursive] Error 1
:info:build make[1]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_valgrind/valgrind/work/valgrind-3.8.1'
:info:build make: *** [all] Error 2
:info:build make: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_valgrind/valgrind/work/valgrind-3.8.1'
:info:build Command failed:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_valgrind/valgrind/work/valgrind-3.8.1" && /usr/bin/make -w all 
:info:build Exit code: 2
:error:build org.macports.build for port valgrind returned: command execution failed
:debug:build Error code: CHILDSTATUS 41934 2
:debug:build Backtrace: command execution failed
    while executing
"system -nice 0 $fullcmdstring"
    ("eval" body line 1)
    invoked from within
"eval system $notty $nice \$fullcmdstring"
    invoked from within
"command_exec build"
    (procedure "portbuild::build_main" line 8)
    invoked from within
"$procedure $targetname"
:info:build Warning: targets not executed for valgrind: org.macports.activate org.macports.build org.macports.destroot org.macports.install
:notice:build Please see the log file for port valgrind for details:
    /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_valgrind/valgrind/main.log

：注意：build--->Building valgrind
：调试：生成执行org.macports.build（valgrind）
：调试：构建环境：CPATH='/opt/local/include'CC\u PRINT\u OPTIONS\u FILE='/opt/local/var/macports/build/\u opt\u local\u var\u macports\u sources\u rsync.macports.org\u release\u ports\u devel\u valgrind/work/.CC\u PRINT\u OPTIONS'lib\lib'lib\CC\u PRINT\u OPTIONS\u-OPTIONS='YES'MACOSX\u-DEPLOYMENT='10.8'
：debug:build汇编命令：“cd”/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_valgrind/valgrind/work/valgrind-3.8.1”&/usr/bin/make-w all”
：debug:build执行命令行：cd”/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_valgrind/valgrind/work/valgrind-3.8.1“&&/usr/bin/make-w all
：信息：构建制作：进入目录“/opt/local/var/macports/build/\u opt\u local\u var\u macports\u sources\u rsync.macports.org\u release\u ports\u devel\u valgrind/valgrind/work/valgrind-3.8.1”
：info:build/usr/bin/make all recursive
：信息：build make[1]：进入目录“/opt/local/var/macports/build/\u opt\u local\u var\u macports\u sources\u rsync.macports.org\u release\u ports\u devel\u valgrind/valgrind/work/valgrind-3.8.1”
：信息：生成包含所有内容
：info:build make[2]：进入目录“/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_valgrind/valgrind/work/valgrind-3.8.1/include”
：信息：build make[2]：对“all”无需执行任何操作。
：info:build make[2]：离开目录“/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_valgrind/valgrind/work/valgrind-3.8.1/include”
：信息：构建使所有内容都在烦恼中
：信息：build make[2]：进入目录“/opt/local/var/macports/build/\u opt\u local\u var\u macports\u sources\u rsync.macports.org\u release\u ports\u devel\u valgrind/valgrind/work/valgrind-3.8.1/VEX”
：info:build/usr/bin/make all am
：信息：build make[3]：进入目录“/opt/local/var/macports/build/\u opt\u local\u var\u macports\u sources\u rsync.macports.org\u release\u ports\u devel\u valgrind/valgrind/work/valgrind-3.8.1/VEX”
：信息：build make[3]：对“所有am”不做任何操作。
：info:build make[3]：离开目录`/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_valgrind/valgrind/work/valgrind-3.8.1/VEX'
：info:build make[2]：离开目录`/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_valgrind/valgrind/work/valgrind-3.8.1/VEX'
：信息：在coregrind中生成全部
：信息：build make[2]：进入目录“/opt/local/var/macports/build/\u opt\u local\u var\u macports\u sources\u rsync.macports.org\u release\u ports\u devel\u valgrind/valgrind/work/valgrind-3.8.1/corefind”
：信息：构建（cd m_马赫和米格/usr/include/mach/mach_vm.defs/usr/include/mach/task.defs/usr/include/include/mach/thread_act.defs/usr/include/mach/vm_map.defs）
：信息：构建
：信息：构建如果您尚未同意Xcode许可协议，请在终端窗口中运行“Xcode构建-许可”（用于用户级验收）或“sudo Xcode构建-许可”（用于系统级验收），以查看并同意Xcode许可协议。
：info:build/usr/bin/mig:line 174:：未找到命令
：信息：生成mig:致命：“”，第1行：无子系统声明
：信息：生成方式[2]：***[m_马赫/m_vmUser.c]错误1
：info:build make[2]：离开目录`/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_valgrind/valgrind/work/valgrind-3.8.1/corefind'
：信息：生成生成[1]：***[所有递归]错误1
：info:build make[1]：离开目录“/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_valgrind/valgrind/work/valgrind-3.8.1”
：信息：生成方式：**[全部]错误2
：信息：构建制作：离开目录“/opt/local/var/macports/build/\u opt\u local\u var\u macports\u sources\u rsync.macports.org\u release\u ports\u devel\u valgrind/valgrind/work/valgrind-3.8.1”
：info:build命令失败：cd”/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_valgrind/valgrind/work/valgrind-3.8.1“&&/usr/bin/make-w all
：信息：生成退出代码：2
：错误：返回端口valgrind的build org.macports.build:命令执行失败
：调试：生成错误代码：CHILDSTATUS 41934 2
：调试：生成回溯：命令执行失败
执行时
“系统-尼斯0$fullcmdstring”
（“评估”正文第1行）
从内部调用
“评估系统$notty$nice\$fullcmdstring”
从内部调用
“命令执行生成”
（过程“portbuild:：build_main”第8行）
从内部调用
“$procedure$targetname”
：信息：生成警告：valgrind未执行目标：org.macports.activate org.macports.build org.macports.desroot org.macports.install
：注意：有关详细信息，请参阅port valgrind的日志文件：
/opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_valgrind/valgrind/main.log

---

我已经安装了Valgrind（3.7，旧版本）。这可能是个问题吗？

如日志中所述，您遇到的一个错误是您没有接受Xcode命令行工具的许可协议。为此，在终端中键入

xcodebuild-license