How to add static libraries inside a C++ project with Xcode

Question

I'm developing a C++ project by using Xcode 4.6.1 as IDE. Now, I'd like to add a static library mylib.a and the related header mylib.h.

I read about this solution, but it doesn't work (while clicking on Target Dependencies, the box is still remaining empty).

Is there a way to achieve this task?

UPDATE:

I created a group, then I added the file mylib.a on it. It seems to work fine, but at compile-time a warning as follows appears:

ld: warning: ignoring file /Users/vdenotaris/Desktop/Code/MyStaticLib/mylib.a, file was built for archive which is not the architecture being linked
(i386):/Users/vdenotaris/Desktop/Code/MyStaticLib/mylib.a

possible duplicate of How to "add existing frameworks" in Xcode 4? — jww
– jww, Commented Jul 3, 2014 at 5:33
possible duplicate of How to add .a C static library to Xcode and use it there? — eonil
– eonil, Commented Jul 3, 2014 at 6:11

Community · Accepted Answer · 2017-05-23 11:46:37Z

17

Target dependencies is used if your static library is created by another XCode project and you want to include this project, so that you can easily develop on both you library and the corresponding application.

If you want to include a foreign library you would select your target under TARGETS there you select the section Build Phases there you have the area Link Binary With Libraries into this area you would add your library either with drag & drop or with the + sign.

To add the include path you select your project under PROJECT there you select the area Build Settings there you have under Search Path the Points Header Search Paths this should include the path to the directory where the header is.

The difference between the settings in Project or Targets is that in Project it sets the default settings for all targets. In Targets you can change the settings per Target.

EDIT For the linking errors this two answers could be helpful:

edited May 23, 2017 at 11:46

CommunityBot

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answered Apr 12, 2013 at 14:30

t.niese

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9 Comments

vdenotaris Over a year ago

Thank you so much for the answer. I linked inside my project mylib.aand my lib.h; now, when I build, appears the following warning:

ld: warning: ignoring file /Users/vdenotaris/Desktop/Code/MyStaticLib/mylib.a, file was built for archive which is not the architecture being linked (i386): /Users/vdenotaris/Desktop/Code/MyStaticLib/mylib.a

. How can I resolve this error?

t.niese Over a year ago

@vdenotaris are you developing an iOS app ?

vdenotaris Over a year ago

No, I'm developing a C++ app for my Master's Thesis.

t.niese Over a year ago

please show the Architectures, Valid Architectures and Supported Platforms for both you static library and application.

vdenotaris Over a year ago

I suppose that the considered static library was built for x64, whereas my project is based on i386 arch.

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