Xcode ProcessPCH iPhone模拟器编译错误

有人知道为什么会这样吗？我在为模拟器编译时遇到了这个错误，而且它是特定于项目的（我尝试了另一个项目，它成功了），所以我的项目设置可能有问题。有人知道具体是什么吗？

解决了这个问题。我将体系结构更改为

标准（armv6 armv7）

，而不仅仅是

armv6 armv7

查看以下线程：

ProcessPCH /Users/Greg/Library/Developer/Xcode/DerivedData/Reflect-bliqehhvpcjjkbevedebyovpynnh/Build/PrecompiledHeaders/Reflect_Prefix-gjmfeslmwxdsbnejtxlenykhtzkb/Reflect_Prefix.pch.gch Reflect_Prefix.pch normal armv6 objective-c com.apple.compilers.llvmgcc42
cd /Users/Greg/Dropbox/Documents/Personal/Code/Reflect
setenv LANG en_US.US-ASCII
setenv PATH "/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/llvm-gcc-4.2 -x objective-c-header -arch armv6 -fmessage-length=0 -pipe -std=c99 -Wno-trigraphs -fpascal-strings -O0 -Wmissing-prototypes -Wreturn-type -Wunused-variable -isysroot /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.3.sdk -fexceptions -mmacosx-version-min=10.6 -gdwarf-2 -fvisibility=hidden -fobjc-abi-version=2 -fobjc-legacy-dispatch -D__IPHONE_OS_VERSION_MIN_REQUIRED=30000 -iquote /Users/Greg/Library/Developer/Xcode/DerivedData/Reflect-bliqehhvpcjjkbevedebyovpynnh/Build/Intermediates/Reflect.build/Debug-iphonesimulator/Reflect.build/Reflect-generated-files.hmap -I/Users/Greg/Library/Developer/Xcode/DerivedData/Reflect-bliqehhvpcjjkbevedebyovpynnh/Build/Intermediates/Reflect.build/Debug-iphonesimulator/Reflect.build/Reflect-own-target-headers.hmap -I/Users/Greg/Library/Developer/Xcode/DerivedData/Reflect-bliqehhvpcjjkbevedebyovpynnh/Build/Intermediates/Reflect.build/Debug-iphonesimulator/Reflect.build/Reflect-all-target-headers.hmap -iquote /Users/Greg/Library/Developer/Xcode/DerivedData/Reflect-bliqehhvpcjjkbevedebyovpynnh/Build/Intermediates/Reflect.build/Debug-iphonesimulator/Reflect.build/Reflect-project-headers.hmap -I/Users/Greg/Library/Developer/Xcode/DerivedData/Reflect-bliqehhvpcjjkbevedebyovpynnh/Build/Products/Debug-iphonesimulator/include -I/Users/Greg/Library/Developer/Xcode/DerivedData/Reflect-bliqehhvpcjjkbevedebyovpynnh/Build/Intermediates/Reflect.build/Debug-iphonesimulator/Reflect.build/DerivedSources/armv6 -I/Users/Greg/Library/Developer/Xcode/DerivedData/Reflect-bliqehhvpcjjkbevedebyovpynnh/Build/Intermediates/Reflect.build/Debug-iphonesimulator/Reflect.build/DerivedSources -F/Users/Greg/Library/Developer/Xcode/DerivedData/Reflect-bliqehhvpcjjkbevedebyovpynnh/Build/Products/Debug-iphonesimulator -c /Users/Greg/Dropbox/Documents/Personal/Code/Reflect/Reflect_Prefix.pch -o /Users/Greg/Library/Developer/Xcode/DerivedData/Reflect-bliqehhvpcjjkbevedebyovpynnh/Build/PrecompiledHeaders/Reflect_Prefix-gjmfeslmwxdsbnejtxlenykhtzkb/Reflect_Prefix.pch.gch

Command /Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/llvm-gcc-4.2 failed with exit code 255