iOS Static library compilation error - table of contents is empty
ios, objective-c, xcode
Solution
This generally happens if your static library contains nothing but categories or informal protocols. The linker is warning you that you don't seem to have any classes to link.
Problem
I am trying to create a Objective C static library for iOS. When I try to compile it gives following warnings. ``` Libtool /Users/******/Library/Developer/Xcode/DerivedData/MyLib-eyucoczochpovhcqduwoieknpyer/Build/Intermediates/MyLib.build/Debug-iphoneos/MyLib.build/Objects-normal/armv7/libMyLib.a normal armv7 cd /Users/******/Desktop/MyLib export IPHONEOS_DEPLOYMENT_TARGET=7.1 export PATH="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.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/libtool -static -arch_only armv7 -syslibroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.1.sdk -L/Users/******/Library/Developer/Xcode/DerivedData/MyLib-eyucoczochpovhcqduwoieknpyer/Build/Products/Debug-iphoneos -filelist /Users/******/Library/Developer/Xcode/DerivedData/MyLib-eyucoczochpovhcqduwoieknpyer/Build/Intermediates/MyLib.build/Debug-iphoneos/MyLib.build/Objects-normal/armv7/MyLib.LinkFileList -ObjC -framework Foundation -o /Users/shafraz/Library/Developer/Xcode/DerivedData/MyLib-eyucoczochpovhcqduwoieknpyer/Build/Intermediates/MyLib.build/Debug-iphoneos/MyLib.build/Objects-normal/armv7/libMyLib.a ``` I am getting similar errors for armv7s, arm64 also ``` (null): /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: warning for library: /Users/******/Library/Developer/Xcode/DerivedData/MyLib-eyucoczochpovhcqduwoieknpyer/Build/Products/Debug-iphoneos/libMyLib.a for architecture: armv7 the table of contents is empty (no object file members in the library define global symbols) ``` I am getting similar errors for armv7s, arm64 also This worming shown only after removing MyLib.m and class declaration in MyLib.h file. How can I fix this?