我尝试使用以下命令安装并运行ddd：
brew install libtool
brew link lesstif
brew install ddd
尝试运行ddd时，收到以下错误消息：
cd@new-host:~$ ddd
dyld: Library not loaded: /opt/X11/lib/libSM.6.dylib
Referenced from: /usr/local/lib/libXm.2.dylib
Reason: image not found
Trace/BPT trap: 5
以下是我的brew config输出内容：
HOMEBREW_VERSION: 0.9.5
ORIGIN: https://github.com/Homebrew/homebrew
HEAD: 7a427a6528c0aa123a43d3adf1c5944ab622c27e
Last commit: 2 hours ago
HOMEBREW_PREFIX: /usr/local
HOMEBREW_CELLAR: /usr/local/Cellar
CPU: dual-core 64-bit penryn
OS X: 10.7.5-i386
Xcode: 4.6.3
CLT: 4.6.0.0.1.1365549073
LLVM-GCC: build 2336
Clang: 4.2 build 425
X11: 2.6.5 => /usr/X11
System Ruby: 1.8.7-358
Perl: /usr/bin/perl
Python: /usr/bin/python
Ruby: /usr/bin/ruby => /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby
以下是我从brew doctor输出的内容：
Warning: Some directories in /usr/local/share/man aren't writable. This can happen if you "sudo make install" software that isn't managed by Homebrew. If a brew tries to add locale information to one of these directories, then the install will fail during the link step. You should probably chown them:
/usr/local/share/man/de
/usr/local/share/man/de/man1
/usr/local/share/man/mann
Warning: Unbrewed dylibs were found in /usr/local/lib. If you didn't put them there on purpose they could cause problems when building Homebrew formulae, and may need to be deleted.
Unexpected dylibs:
/usr/local/lib/libtcl8.6.dylib
/usr/local/lib/libtk8.6.dylib
Warning: Unbrewed header files were found in /usr/local/include. If you didn't put them there on purpose they could cause problems when building Homebrew formulae, and may need to be deleted.
Unexpected header files:
/usr/local/include/fakemysql.h
/usr/local/include/fakepq.h
/usr/local/include/fakesql.h
/usr/local/include/itcl.h
/usr/local/include/itcl2TclOO.h
/usr/local/include/itclDecls.h
/usr/local/include/itclInt.h
/usr/local/include/itclIntDecls.h
/usr/local/include/itclMigrate2TclCore.h
/usr/local/include/itclTclIntStubsFcn.h
/usr/local/include/mysqlStubs.h
/usr/local/include/odbcStubs.h
/usr/local/include/pqStubs.h
/usr/local/include/tcl.h
/usr/local/include/tclDecls.h
/usr/local/include/tclOO.h
/usr/local/include/tclOODecls.h
/usr/local/include/tclPlatDecls.h
/usr/local/include/tclThread.h
/usr/local/include/tclTomMath.h
/usr/local/include/tclTomMathDecls.h
/usr/local/include/tdbc.h
/usr/local/include/tdbcDecls.h
/usr/local/include/tdbcInt.h
/usr/local/include/tk.h
/usr/local/include/tkDecls.h
/usr/local/include/tkPlatDecls.h
Warning: Unbrewed .pc files were found in /usr/local/lib/pkgconfig. If you didn't put them there on purpose they could cause problems when building Homebrew formulae, and may need to be deleted.
Unexpected .pc files:
/usr/local/lib/pkgconfig/tcl.pc
/usr/local/lib/pkgconfig/tk.pc
Warning: Unbrewed static libraries were found in /usr/local/lib. If you didn't put them there on purpose they could cause problems when building Homebrew formulae, and may need to be deleted.
Unexpected static libraries:
/usr/local/lib/libtclstub8.6.a
/usr/local/lib/libtkstub8.6.a
Warning: /usr/bin occurs before /usr/local/bin This means that system-provided programs will be used instead of those provided by Homebrew. The following tools exist at both paths:
dot
Consider setting your PATH so that /usr/local/bin occurs before /usr/bin. Here is a one-liner:
echo export PATH='/usr/local/bin:$PATH' >> ~/.bash_profile
这些brew doctor警告是否需要我尝试纠正？我的其他所有brew安装程序都没问题，所以有点不愿意开始搞那些文件。谢谢！
编辑：在macOS 10.14.4上，我收到了这个错误：
Jamess-MacBook-Air:haskell-usaco james$ ddd
Error: Unresolved inheritance operation
Xt error (Unresolved inheritance operation).
Oops! You have found a bug in DDD.
If you can reproduce this bug, please send a bug report
to <ddd@gnu.org>, giving a subject like
DDD 3.3.12 (i386-apple-darwin18.0.0) gets Xt error
使用LLDB启动DDD时，会打印出以下错误信息：
XIO: fatal IO error 35 (Resource temporarily unavailable) on X server "/private/tmp/com.apple.launchd.cxF3NWNYqR/org.macosforge.xquartz:0"
after 5 requests (5 known processed) with 0 events remaining
X11已经从Homebrew和XQuartz网站都安装了。