如何在另一个静态库中添加一个静态库.a文件

Question

我正在创建一个应用程序，因为我要添加一个第三方库。并且我创建了一个静态库。所以现在我想将我的库包含到该第三方库中。如果我在添加到我的应用程序中之前编译了该第三方库，它只会为这两个文件创建单个.a文件，或者我必须在另一个示例应用程序的.a文件中包含我的库.a文件以及第三方文件。如果要创建单个.a文件，则.h文件是什么我必须仅包括第三方库.h文件或我的库.h文件。

Answer 1

Static libraries are not embedded into one another, if this is what you are asking.

A static library is just a collection of object files, each corresponding to a compilation unit (eg, your .m files).

In practice, you can disassemble two static libraries to extract all the component object files and then reassemble those in a new static library, but this is not what the compiler does normally.

So, say you have a static library lib1.a that depends on a second static library lib2.a; you create an executable by linking both libraries with your main function. Unless you manually "merge" the two libraries, each time you want to use lib1.a, you will also need to link lib2.a.

This can be checked really easily in Xcode.

As to header files, you need to include the header files for both libraries, as well.

If you want more information about merging two static library in order to create a new static library that includes the object files of both, check this or this .

Answer 2

When you link one static library to another, you only need to link the resulting combined static library with your application. You will need to include the headers that define public interface for your library, and those for the third party library in your application. Any frameworks used by either your library or the third party must be linked with the application.