Clang LLVM 1.0错误

Question

Tried to add a new category and now im getting this error

ProcessPCH /Users/Home/Library/Developer/Xcode/DerivedData/tutorial-dmhshuqgvfykctbdzxopvinwcvpd/Build/Intermediates/PrecompiledHeaders/tutorial-Prefix-azwowysritanixcinyybieddtusa/tutorial-Prefix.pch.pth tutorial/tutorial-Prefix.pch normal x86_64 objective-c com.apple.compilers.llvm.clang.1_0.compiler
cd /Users/Home/Developer/tutorial
setenv LANG en_US.US-ASCII
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -x objective-c-header -arch x86_64 -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 -Wshorten-64-to-32 -Wpointer-sign -Wno-newline-eof -Wno-selector -Wno-strict-selector-match -Wno-undeclared-selector -Wno-deprecated-implementations -DDEBUG=1 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk -fasm-blocks -Wprotocol -Wdeprecated-declarations -mmacosx-version-min=10.8 -g -Wno-sign-conversion "-DIBOutlet=__attribute__((iboutlet))" "-DIBOutletCollection(ClassName)=__attribute__((iboutletcollection(ClassName)))" "-DIBAction=void)__attribute__((ibaction)" -iquote /Users/Home/Library/Developer/Xcode/DerivedData/tutorial-dmhshuqgvfykctbdzxopvinwcvpd/Build/Intermediates/tutorial.build/Debug/tutorial.build/tutorial-generated-files.hmap -I/Users/Home/Library/Developer/Xcode/DerivedData/tutorial-dmhshuqgvfykctbdzxopvinwcvpd/Build/Intermediates/tutorial.build/Debug/tutorial.build/tutorial-own-target-headers.hmap -I/Users/Home/Library/Developer/Xcode/DerivedData/tutorial-dmhshuqgvfykctbdzxopvinwcvpd/Build/Intermediates/tutorial.build/Debug/tutorial.build/tutorial-all-target-headers.hmap -iquote /Users/Home/Library/Developer/Xcode/DerivedData/tutorial-dmhshuqgvfykctbdzxopvinwcvpd/Build/Intermediates/tutorial.build/Debug/tutorial.build/tutorial-project-headers.hmap -I/Users/Home/Library/Developer/Xcode/DerivedData/tutorial-dmhshuqgvfykctbdzxopvinwcvpd/Build/Products/Debug/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/Home/Library/Developer/Xcode/DerivedData/tutorial-dmhshuqgvfykctbdzxopvinwcvpd/Build/Intermediates/tutorial.build/Debug/tutorial.build/DerivedSources/x86_64 -I/Users/Home/Library/Developer/Xcode/DerivedData/tutorial-dmhshuqgvfykctbdzxopvinwcvpd/Build/Intermediates/tutorial.build/Debug/tutorial.build/DerivedSources -F/Users/Home/Library/Developer/Xcode/DerivedData/tutorial-dmhshuqgvfykctbdzxopvinwcvpd/Build/Products/Debug --serialize-diagnostics /Users/Home/Library/Developer/Xcode/DerivedData/tutorial-dmhshuqgvfykctbdzxopvinwcvpd/Build/Intermediates/PrecompiledHeaders/tutorial-Prefix-azwowysritanixcinyybieddtusa/tutorial-Prefix.pch.dia -c /Users/Home/Developer/tutorial/tutorial/tutorial-Prefix.pch -o /Users/Home/Library/Developer/Xcode/DerivedData/tutorial-dmhshuqgvfykctbdzxopvinwcvpd/Build/Intermediates/PrecompiledHeaders/tutorial-Prefix-azwowysritanixcinyybieddtusa/tutorial-Prefix.pch.pth -MMD -MT dependencies -MF /Users/Home/Library/Developer/Xcode/DerivedData/tutorial-dmhshuqgvfykctbdzxopvinwcvpd/Build/Intermediates/PrecompiledHeaders/tutorial-Prefix-azwowysritanixcinyybieddtusa/tutorial-Prefix.pch.d

clang: error: no such file or directory: '/Users/Home/Developer/tutorial/tutorial/tutorial-Prefix.pch'
clang: error: no input files
Command /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang failed with exit code 1

Answer 1

It seems like your target is empty, and that you have deleted the prefix file for mistake.

Select your project target (the azure icon at the top of the groups hierarchy on the left), select the target (equal to the project name) under "targets", then select the build phases tag and and add files to the compile sources.

As for the prefix file, you may want to re-create it, it'n names "YourProjectName-Prefix.pch". This is the content of my prefix file:

#ifdef __OBJC__
    #import <Cocoa/Cocoa.h>
#endif

Try it, and consider that you may always want to build a project from scratch if something goes wrong and you haven't time to fix it.

Answer 2

You can either do what @Ramy was suggesting or you can simply remove the Prefix Header from your target build settings. Simply remove the content of that field, you can't delete the actual field.

Answer 3

I received this error because I accidentally gave a source file a -m flag instead of a -w flag. Here's to fat fingers.