Generating a fat library from .a static library

Question

I want to create a iOS project using c static libraries. I have downaloaded these files

ohNetGenerated-iOs-arm64-Debug.tar.gz

ohNetGenerated-iOs-arm64-Release.tar.gz

ohNetGenerated-iOs-armv7-Debug.tar.gz

ohNetGenerated-iOs-armv7-Release.tar.gz

ohNetGenerated-iOs-x86-Debug.tar.gz

ohNetGenerated-iOs-x86-Release.tar.gz

When I extract them they all have: libohNetGeneratedDevices.a

How can I generate a fat library? Is it possible

Thank you

You want to generate one lin which contains all of the contents of those? I have the impression that only one of them is supposed to be used at a time. I.e. I expect that they will have heavily overlapping APIs. — Yunnosch
– Yunnosch, Commented Jun 16, 2018 at 12:00
Please explain about the "Why?". I feel that we might be dealing with an XY problem. meta.stackexchange.com/questions/66377/what-is-the-xy-problem — Yunnosch
– Yunnosch, Commented Jun 16, 2018 at 12:00
Check this: stackoverflow.com/questions/8170450/combine-static-libraries — arturdev
– arturdev, Commented Jun 16, 2018 at 12:30

Samuel Peter · Accepted Answer · 2018-06-16 12:32:31Z

1

Use lipo to create a fat library:

lipo -create armv7/libmylib.a arm64/libmylib.a x86/libmylib.a -output libfat.a

You can combine the versions of the library that are for different architectures in a fat library, but you can't combine versions of the library that are for the same architecture, so you can't combine the Release and Debug versions of the same architecture.

edited Jun 16, 2018 at 12:32

answered Jun 16, 2018 at 12:27

Samuel Peter

4,2142 gold badges36 silver badges44 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

Samuel Peter Over a year ago

Glad it works! Yes, you can use lipo -info libfat.a to see the architectures inside

Reimond Hill Over a year ago

Yes It also works!, I run the info and it says: Architectures in the fat file: ohNetDevicesFatDebug.a are: armv7 i386 arm64. The library has includes, any of them (if I just include arm64 for example) would work using the the libfat.a, isn't it?

Samuel Peter Over a year ago

Yes normally the header files are platform independent. Strictly speaking it's not necessarily the case as they can contain macros or inline functions that can contain inline assembly or compiler intrinsics specific for a platform. But it's a safe bet and if not you will find out during compilation

Reimond Hill Over a year ago

Thank you very much again! I would upvote you more times but i can't :)

Collectives™ on Stack Overflow

Generating a fat library from .a static library

1 Answer 1

4 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

4 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related