How can I know which architecture an *.a file is built for?

问题

I'm working on mac OS 10.7.4. using Xcode 4.3.2 .

I had a *.a static library file from my partner. I want to know which architecture it is built for. Is it ARMv6, ARMv7, i386 or other architecture?

Is there any command or method to get info about the architecture of the file?

回答1:

You can use otool to find out the architecture(s) of a file: otool man page

otool -hv mylibrary.a

回答2:

The Unix/Linux file command will tell you what kind of file it is:

% file a.out
a.out: Mach-O 64-bit executable x86_64

来源：https://stackoverflow.com/questions/12001195/how-can-i-know-which-architecture-an-a-file-is-built-for