Qt c++ compiling for iOS simulator cross compiling

I am developing using Qt C++, on my first run for iOS simulator I received this error :
error: building for iOS simulator, but linking against dylib built for OSX, file ‘/usr/local/Cellar/libcouchbase/2.5.4/lib/libcouchbase.dylib’ for architecture x86_64

I might have the wrong understanding with some concepts of building cross platform application using Couchbase. Any help ?

I am not sure what you are asking, but building for Couchbase is the same as building for other applications. Note that by default Homebrew installs only 64-bit builds.

It would seem your iOS simulator (presumably to conserve memory) uses 32 bit builds.

You can do:

$ brew install libcouchbase --universal

to have it generate both 64 and 32 bit binaries

Thanks @mnunberg solved the issue.