What does the -all_load linker flag do?

iphone objective-c gcc linker
Guy Ephraim picture Guy Ephraim · May 25, 2010 · Viewed 62.7k times · Source

I can't find anywhere what the -all_load flag do when compiling Objective-C code.

I have some issues uploading binaries to Apple, the they say it's because I didn't use this flag, but my code compiles even without it.

Can some one help me with that?

Thanks

Answer

Sharjeel Aziz picture Sharjeel Aziz · May 25, 2010

It is probably related to this technical note https://developer.apple.com/library/content/qa/qa1490/_index.html

IMPORTANT: For 64-bit and iPhone OS applications, there is a linker bug that prevents -ObjC from loading objects files from static libraries that contain only categories and no classes. The workaround is to use the -all_load or -force_load flags. -all_load forces the linker to load all object files from every archive it sees, even those without Objective-C code. -force_load is available in Xcode 3.2 and later. It allows finer grain control of archive loading. Each -force_load option must be followed by a path to an archive, and every object file in that archive will be loaded.

Related questions

Apple Mach-O Linker Error when compiling for device

I've just upgraded to xcode 4.0 and I can no longer deploy to iPhone, I get a Apple Mach-O Linker Error, it still works for the simulator though. Ld /Users/yveswheeler/Library/Developer/Xcode/DerivedData/iParcel-fkeqjcjcbbhjwhdssjptkdxzzzxh/Build/Intermediates/iParcel.build/Debug-iphoneos/…

Read More
How much does it cost to develop an iPhone application?

How much can a developer charge for an iPhone app like Twitterrific? I want to know this because I need such an application with the same functionality for a new community website. I can do Ruby but have no experience …

Read More
How do I make an HTTP request in Swift?

I read The Programming Language Swift by Apple in iBooks, but cannot figure out how to make an HTTP request (something like cURL) in Swift. Do I need to import Obj-C classes or do I just need to import default …

Read More