C++ - Switching from G++ to Xcode (and clang)

Question

I'm trying to use a sample program for the gloox library (a XMPP client library for C++) that I'll eventually integrate into (among others) an iOS app. An obvious (yet frustrating difficult) step in achieving this is to use the C++ code in Xcode (typically with the clang compiler).

How I compiled using G++:

g++ -o bot bot.cpp -lgloox -lpthread

What I've tried in Xcode:

Under my targets build settings:

• Went to Other C++ Flags and added -lpthread and -lgloox, so in theory the required libraries are linked.
• Went to Header Search Paths and added /usr/include and /usr/local/include, both set to recursive. The gloox headers are found in /usr/local/include, so the header should theoretically be available.

However, when I go to compile this abomination, I get these errors:

Can somebody help me make sense of these?

Edit: I've searched the internet extensively for this, to no avail.

Answer 1

You will need to remove /usr/include from your library search paths. It's already included by default, and trying to add it a second time can make it end up overriding some headers provided by the compiler, with unfortunate results.

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The link errors you got when you did this look like the gloox library isn't being used at link time, so that's failing now. This is progress! — if you're getting to the link phase, compilation is now going just fine.

Go to your project settings (click the project name at the top of the left-hand column), go to the "Build Phases" tab, open up the "Link Binary With Libraries" phase, and click the + button. Then find libgloox.dylib (probably in /usr/local/lib) and add it.