Apple LLVM comstackdor 4.1 Error

Soy muy nuevo en la progtwigción de iOS. Estoy literalmente tratando de comstackr un proyecto vacío que, en la medida de lo que sé, debería funcionar, pero me encuentro con un error:

ProcessPCH /users/case4/murphb52/Library/Developer/Xcode/DerivedData/USB1-frxarpuqvqeibygmuqixzogxrplz/Build/Intermediates/PrecompiledHeaders/USB1-Prefix-gsurnmlnnrebssbippyayakjgjix/USB1-Prefix.pch.pth USB1/USB1-Prefix.pch normal i386 objective-c com.apple.compilers.llvm.clang.1_0.compiler cd "/Volumes/SP UFD U2/USB1" setenv LANG en_US.US-ASCII setenv PATH "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Applications/Xcode.app/Contents/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin" /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -x objective-c-header -arch i386 -fmessage-length=0 -std=gnu99 -fobjc-arc -Wno-trigraphs -fpascal-strings -O0 -Wno-missing-field-initializers -Wno-missing-prototypes -Wreturn-type -Wno-implicit-atomic-properties -Wno-receiver-is-weak -Wduplicate-method-match -Wformat -Wno-missing-braces -Wparentheses -Wswitch -Wno-unused-function -Wno-unused-label -Wno-unused-parameter -Wunused-variable -Wunused-value -Wempty-body -Wuninitialized -Wno-unknown-pragmas -Wno-shadow -Wno-four-char-constants -Wno-conversion -Wno-shorten-64-to-32 -Wpointer-sign -Wno-newline-eof -Wno-selector -Wno-strict-selector-match -Wno-undeclanetworking-selector -Wno-deprecated-implementations -DDEBUG=1 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.0.sdk -fexceptions -fasm-blocks -Wprotocol -Wdeprecated-declarations -g -Wno-sign-conversion -fobjc-abi-version=2 -fobjc-legacy-dispatch "-DIBOutlet=__attribute__((iboutlet))" "-DIBOutletCollection(ClassName)=__attribute__((iboutletcollection(ClassName)))" "-DIBAction=void)__attribute__((ibaction)" -mios-simulator-version-min=6.0 -iquote /users/case4/murphb52/Library/Developer/Xcode/DerivedData/USB1-frxarpuqvqeibygmuqixzogxrplz/Build/Intermediates/USB1.build/Debug-iphonesimulator/USB1.build/USB1-generated-files.hmap -I/users/case4/murphb52/Library/Developer/Xcode/DerivedData/USB1-frxarpuqvqeibygmuqixzogxrplz/Build/Intermediates/USB1.build/Debug-iphonesimulator/USB1.build/USB1-own-target-headers.hmap -I/users/case4/murphb52/Library/Developer/Xcode/DerivedData/USB1-frxarpuqvqeibygmuqixzogxrplz/Build/Intermediates/USB1.build/Debug-iphonesimulator/USB1.build/USB1-all-target-headers.hmap -iquote /users/case4/murphb52/Library/Developer/Xcode/DerivedData/USB1-frxarpuqvqeibygmuqixzogxrplz/Build/Intermediates/USB1.build/Debug-iphonesimulator/USB1.build/USB1-project-headers.hmap -I/users/case4/murphb52/Library/Developer/Xcode/DerivedData/USB1-frxarpuqvqeibygmuqixzogxrplz/Build/Products/Debug-iphonesimulator/include -I/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include -I/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include -I/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include -I/users/case4/murphb52/Library/Developer/Xcode/DerivedData/USB1-frxarpuqvqeibygmuqixzogxrplz/Build/Intermediates/USB1.build/Debug-iphonesimulator/USB1.build/DerivedSources/i386 -I/users/case4/murphb52/Library/Developer/Xcode/DerivedData/USB1-frxarpuqvqeibygmuqixzogxrplz/Build/Intermediates/USB1.build/Debug-iphonesimulator/USB1.build/DerivedSources -F/users/case4/murphb52/Library/Developer/Xcode/DerivedData/USB1-frxarpuqvqeibygmuqixzogxrplz/Build/Products/Debug-iphonesimulator --serialize-diagnostics /users/case4/murphb52/Library/Developer/Xcode/DerivedData/USB1-frxarpuqvqeibygmuqixzogxrplz/Build/Intermediates/PrecompiledHeaders/USB1-Prefix-gsurnmlnnrebssbippyayakjgjix/USB1-Prefix.pch.dia -c "/Volumes/SP UFD U2/USB1/USB1/USB1-Prefix.pch" -o /users/case4/murphb52/Library/Developer/Xcode/DerivedData/USB1-frxarpuqvqeibygmuqixzogxrplz/Build/Intermediates/PrecompiledHeaders/USB1-Prefix-gsurnmlnnrebssbippyayakjgjix/USB1-Prefix.pch.pth -MMD -MT dependencies -MF /users/case4/murphb52/Library/Developer/Xcode/DerivedData/USB1-frxarpuqvqeibygmuqixzogxrplz/Build/Intermediates/PrecompiledHeaders/USB1-Prefix-gsurnmlnnrebssbippyayakjgjix/USB1-Prefix.pch.d fatal error: error in backend: IO failure on output stream. Command /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang failed with exit code 1 

Solo me pregunto ¿alguien tiene alguna solución o idea de lo que estoy haciendo mal?

Lo más probable es que no tengas espacio en el disco. ¿Dónde se encuentra tu carpeta de compilation? Puede que no se le permita escribir y provocar ese error.

Tenía este problema, probé la mayoría de las cosas, pero al final un reinicio de OSX resolvió el problema para mí.

Derek es correcto. En mi caso, el disco RAM que utilizo para los datos derivados de XCode estaba lleno.