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发布static library给使用者使用。在实际的工程实践中,iOS静态库一般会在对外/对内提供SDK时出现。
静态库(SDK)本身可能依赖一些第三方的库,当使用该SDK的App也依赖了同样的第三方库,那么问题就来啦。
Figure: SDK 和 SDK Customer 依赖相同的3rd library
Ref[1] Ref[4]
Ref[5]
1 $ lipo libXXXSDK.a -thin armv7 -output libXXXSDK-armv7.a 2 $ ar -x libXXXSDK-armv7.a
Ref[6] Ref[7]
A: NSLog
debug: NSLog会输出
release: NSLog不会输出
A) 隐藏静态库的符号
Ref[17]
" Hiding internal names requires a few simple Xcode build settings, and it is not generally
necessary to modify source or change the type of the built product.
1. Eliminate any internal symbols required between modules by performing a single-object prelink.
Set the Xcode build setting named "Perform Single-Object Prelink" to Yes (GENERATE_MASTER_OBJECT_FILE=YES).
This causes ld to be run with the "-r" flag.
2. Make sure that the setting "Strip Style" is set to "Non-global symbols" (STRIP_STYLE=non-global), this passes "-x" to ld.
Stripping is only actually performed on static libraries if post-processing is enabled (and this is not the default).
3. Set Xcode build setting "Deployment Postprocessing" to yes. (DEPLOYMENT_POSTPROCESSING=YES).
Also make sure that "Use separate strip" is set to Yes (not always the default).
4. If, in addition to local symbols, if you need to remove some of the global symbols you can supply additional
options to the strip command, under the Xcode build setting "Additional strip flags". E.g. I commonly
use the strip "-R somefile" option to provide a file with an additional list of symbols which I want removed
from the global symbol table." Ref[17]
关于"STRIP_SYTLE" 参考Ref[19]
B) 将静态库的符号表剔除后, 会出现这种情况: 静态库出现crash时,无法将地址符号化。Ref[18]
C) 那么静态库的符号被strip掉后, 会不会像App被生成.dSYM文件呢? 或者其他类似的东西?
Ref[15]
Ref[16]
1. Avoiding dependency collisions in iOS static library managed by CocoaPods (AAAA+)
http://blog.sigmapoint.pl/avoiding-dependency-collisions-in-ios-static-library-managed-by-cocoapods/
2. Using Static Libraries in iOS
https://developer.apple.com/library/ios/technotes/iOSStaticLibraries/Articles/creating.html
3. UNIX ar Examples: How To Create, View, Extract, Modify C Archive Files (*.a)
http://www.thegeekstuff.com/2010/08/ar-command-examples/
4. Avoiding duplicate symbol errors during linking by removing classes from static libraries (ToRead)
http://atnan.com/blog/2012/01/12/avoiding-duplicate-symbol-errors-during-linking-by-removing-classes-from-static-libraries
5. Extract object (*.o) files from an iPhone static library
6. How to build a library for both iPhone simulator and device?
7. Build fat static library (device + simulator) using Xcode and SDK 4+
8. Distributing your Static Library
http://www.akitaonrails.com/2011/04/24/objective-c-distributing-your-static-library#.VZY4ShOqqko
9. Xcode 6 drops armv7s
https://www.cocoanetics.com/2014/10/xcode-6-drops-armv7s/
10. iOS Static Libraries Are, Like, Really Bad, And Stuff (ToRead)
http://landonf.org/code/ios/Radar_15800975_iOS_Frameworks.20140112.html
11. Strip debug symbol from universal static libraries (tested for iOS only)
https://gist.github.com/neonichu/1662881
12. An XCode project template to build universal frameworks (arm7, arm7s, and simulator) for iOS / iPhone.
https://github.com/kstenerud/iOS-Universal-Framework
13. http://www.raywenderlich.com/41377/creating-a-static-library-in-ios-tutorial (AAAA+)
14. strip nmeidt symbols: 编辑符号的工具
https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man1/symbols.1.html
15. Automatic build of static library for iOS and many architectures (AAAA+)
http://blog.sigmapoint.pl/automatic-build-of-static-library-for-ios-for-many-architectures/
16. How to distribute Static libraries?
http://stackoverflow.com/questions/5730432/how-to-distribute-static-libraries/5778007#5778007
"So, long story short : just distribute a fat, release version of your library !"
17. strip symbol in static library
17.1 Symbol hiding in static libraries built with Xcode/gcc
17.2 Symbolification: Shipping Symbols
http://bdunagan.com/2010/05/15/symbolification-shipping-symbols/
17.3 How to solve symbolication problems --> "Build settings for getting proper symbol data"
http://support.hockeyapp.net/kb/client-integration-ios-mac-os-x/how-to-solve-symbolication-problems
17.4 xcode build settings for debug symbol
http://jonathanblog2000.blogspot.tw/2013/07/xcode-build-settings-for-debug-symbol.html
18. Symbolicating crash log for app with static library
19. Xcode Build Setting Reference
https://developer.apple.com/library/ios/documentation/DeveloperTools/Reference/XcodeBuildSettingRef/1-Build_Setting_Reference/build_setting_ref.html
https://developer.apple.com/library/mac/technotes/tn2004/tn2123.html#SECNOSYMBOLS
iOS.StaticLibrary.1-avoid-duplicate-symbol-in-static-library[draft]
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原文地址:http://www.cnblogs.com/cwgk/p/4618637.html