如何合并为armv7和i386构建的两个.a文件？

Question

I have 2 static library(.a) files. These 2 files are basically same library. one is built for architecture armv7, another one is built for architecture i386. Is it possible to merge these 2 libraries into 1 file? Unfortunately, I don't have any source code to re-build them.

Thank you in advance :D

Answer 1

You need to get to know what can be done with the lipo and libtool command line tools, both of which come with Xcode.

Here's a tutorial that might get you started on the process.

The steps include something like:

1. lipo -info libFirst.a libSecond.a find out what architectures are in the .a files
2. lipo -extract armv7s libFirst.a -o libFirst_armv7s.a extract the architectures you want
3. libtool -static libFirst_armv7.a libSecond_armv7.a -o libCombined_armv7.a combine the architecture specific .a files into one
4. lipo -create libCombined_armv7.a libCombined_armv7s.a -o libCombined.a and this gives you the final .a library.

And here's some older documentation from Apple which describes how to use the tools to create combined static libraries.