今天早上我从Apple opensource repository下载了最新的mDNSResponder。我打开了xCode项目（mDNSResponder-544 / mDNSMacOSX）并尝试编译，但缺少一些文件：
#include <CoreFoundation/CFXPCBridge.h>。#include <dispatch/private.h>（但是用GCC编译，所以我很好）我在OSx 10.9.2上运行Xcode 5.1，并安装了命令行工具。
我附加了xcodebuild的输出：
$ xcodebuild
--- xcodebuild: WARNING: The directory /Users/kas/Downloads/mDNSResponder-544/mDNSMacOSX also contains the legacy project 'mDNSResponder.pbproj' - ignoring it and using 'mDNSResponder.xcodeproj'.
=== BUILD TARGET BonjourEvents OF PROJECT mDNSResponder WITH THE DEFAULT CONFIGURATION (Development) ===
Check dependencies
CompileC build/mDNSResponder.build/Development/BonjourEvents.build/Objects-normal/x86_64/BonjourEvents.o BonjourEvents.c normal x86_64 c com.apple.compilers.llvm.clang.1_0.compiler
cd /Users/adsada/Downloads/mDNSResponder-544/mDNSMacOSX
export LANG=en_US.US-ASCII
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -x c -arch x86_64 -fmessage-length=129 -fdiagnostics-show-note-include-stack -fmacro-backtrace-limit=0 -fcolor-diagnostics -Wno-trigraphs -fpascal-strings -Os -Werror -Wno-missing-field-initializers -Wno-missing-prototypes -Wno-return-type -Wno-missing-braces -Wparentheses -Wswitch -Wno-unused-function -Wno-unused-label -Wno-unused-parameter -Wno-unused-variable -Wunused-value -Wno-empty-body -Wno-uninitialized -Wno-unknown-pragmas -Wno-shadow -Wno-four-char-constants -Wno-conversion -Wno-constant-conversion -Wno-int-conversion -Wno-bool-conversion -Wno-enum-conversion -Wno-shorten-64-to-32 -Wpointer-sign -Wno-newline-eof -D__APPLE_USE_RFC_3542=1 -D_DNS_SD_LIBDISPATCH=1 -DAPPLE_OSX_mDNSResponder=1 -D__MigTypeCheck=1 -DmDNSResponderVersion=(Engineering\ Build) -D_LEGACY_NAT_TRAVERSAL_ -D_BUILDING_XCODE_PROJECT_=1 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk -fasm-blocks -fstrict-aliasing -Wdeprecated-declarations -mmacosx-version-min=10.9 -g -Wno-sign-conversion -iquote /Users/askdjkadj/Downloads/mDNSResponder-544/mDNSMacOSX/build/mDNSResponder.build/Development/BonjourEvents.build/BonjourEvents-generated-files.hmap -I/Users/sdaad/Downloads/mDNSResponder-544/mDNSMacOSX/build/mDNSResponder.build/Development/BonjourEvents.build/BonjourEvents-own-target-headers.hmap -I/Users/sadad/Downloads/mDNSResponder-544/mDNSMacOSX/build/mDNSResponder.build/Development/BonjourEvents.build/BonjourEvents-all-target-headers.hmap -iquote /Users/asdsad/Downloads/mDNSResponder-544/mDNSMacOSX/build/mDNSResponder.build/Development/BonjourEvents.build/BonjourEvents-project-headers.hmap -I/Users/asdd/Downloads/mDNSResponder-544/mDNSMacOSX/build/include -I/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include -I/Users/asad/Downloads/mDNSResponder-544/mDNSMacOSX/build/mDNSResponder.build/Development/BonjourEvents.build/DerivedSources/x86_64 -I/Users/adssad/Downloads/mDNSResponder-544/mDNSMacOSX/build/mDNSResponder.build/Development/BonjourEvents.build/DerivedSources -W -Wall -Wmissing-prototypes -Wno-four-char-constants -Wno-unknown-pragmas -Wshadow -F/Users/asdd/Downloads/mDNSResponder-544/mDNSMacOSX/build -DUSE_SYSTEMCONFIGURATION_PRIVATE_HEADERS -fwrapv -MMD -MT dependencies -MF /Users/asd/Downloads/mDNSResponder-544/mDNSMacOSX/build/mDNSResponder.build/Development/BonjourEvents.build/Objects-normal/x86_64/BonjourEvents.d --serialize-diagnostics /Users/sad/Downloads/mDNSResponder-544/mDNSMacOSX/build/mDNSResponder.build/Development/BonjourEvents.build/Objects-normal/x86_64/BonjourEvents.dia -c /Users/asd/Downloads/mDNSResponder-544/mDNSMacOSX/BonjourEvents.c -o /Users/ads/Downloads/mDNSResponder-544/mDNSMacOSX/build/mDNSResponder.build/Development/BonjourEvents.build/Objects-normal/x86_64/BonjourEvents.o
/Users/asd/Downloads/mDNSResponder-544/mDNSMacOSX/BonjourEvents.c:19:10: fatal error: 'CoreFoundation/CFXPCBridge.h' file not found
#include <CoreFoundation/CFXPCBridge.h>
^
1 error generated.
2014-04-06 13:10:32.208 xcodebuild[3417:30b] DVTAssertions: Warning in /SourceCache/IDEXcode3ProjectSupport/IDEXcode3ProjectSupport-5067/Xcode3Core/LegacyProjects/Frameworks/DevToolsCore/DevToolsCore/SpecificationTypes/BuiltInSpecifications/Compilers/XCGccMakefileDependencies.m:76
Details: Failed to load dependencies output contents from ``/Users/asd/Downloads/mDNSResponder-544/mDNSMacOSX/build/mDNSResponder.build/Development/BonjourEvents.build/Objects-normal/x86_64/BonjourEvents.d''. Error: Error Domain=NSCocoaErrorDomain Code=260 "The file “BonjourEvents.d” couldn’t be opened because there is no such file." UserInfo=0x7fbacb566c60 {NSFilePath=/Users/asd/Downloads/mDNSResponder-544/mDNSMacOSX/build/mDNSResponder.build/Development/BonjourEvents.build/Objects-normal/x86_64/BonjourEvents.d, NSUnderlyingError=0x7fbacb5364c0 "The operation couldn’t be completed. No such file or directory"}. User info: {
NSFilePath = "/Users/ada/Downloads/mDNSResponder-544/mDNSMacOSX/build/mDNSResponder.build/Development/BonjourEvents.build/Objects-normal/x86_64/BonjourEvents.d";
NSUnderlyingError = "Error Domain=NSPOSIXErrorDomain Code=2 \"The operation couldn\U2019t be completed. No such file or directory\"";
}.
Function: void XCGccMakefileDependenciesParsePathsFromRuleFile(NSString *__strong, void (^__strong)(NSString *__strong))
Thread: <NSThread: 0x7fbacb561070>{name = (null), num = 7}
Please file a bug at http://bugreport.apple.com with this warning message and any useful information you can provide.
** BUILD FAILED **
The following build commands failed:
CompileC build/mDNSResponder.build/Development/BonjourEvents.build/Objects-normal/x86_64/BonjourEvents.o BonjourEvents.c normal x86_64 c com.apple.compilers.llvm.clang.1_0.compiler
(1 failure)
确实locate CFXPCBridge.h没有返回任何内容。
感谢您的帮助。