[Qt-interest] "not of required architecture" error message on my own static library

[Mike Jackson]

On 2009-09-06 11:17:52 -0400, Warren <warren at wantonhubris.com> said:

> 
> I'm working in OSX on an Intel Macbook Pro, for reference.  QT 4.5.3.
> 
> I'm getting pretty frustrated here as this makes little sense to me.   
> I created a project in QT and built a static library.  That dropped a  
> ".a" file on my hard drive which is all good.  I then created a GUI  
> project in QT and cannot for the life of me get it to link to the  
> static library.
> 
> Whenever I compile the GUI app, I get this error:
> 
> "ld: warning: in ../CommonFramework/libCommonFramework.a, file is not  
> of required architecture"
> 
> I'm brand new to the land of QT so be gentle.  Which idiotic newbie  
> mistake am I committing here?
> 
> 
> 
> The .PRO file for the static library:
> 
> # -------------------------------------------------
> # Project created by QtCreator 2009-09-06T09:50:35
> # -------------------------------------------------
> QT -= gui
> TARGET = CommonFramework
> TEMPLATE = lib
> CONFIG += staticlib x86
> SOURCES += xmapreader.cpp
> HEADERS += xmapreader.h \
> CommonInclude.h
> PRECOMPILED_HEADER += CommonInclude.h
> 
> The .PRO file for the GUI app:
> 
> # -------------------------------------------------
> # Project created by QtCreator 2009-09-06T08:01:41
> # -------------------------------------------------
> QT += opengl \
> webkit
> TARGET = LevelEd
> TEMPLATE = app
> SOURCES += main.cpp \
> leveledwindow.cpp
> HEADERS += leveledwindow.h \
> LevelEdInclude.h
> FORMS += leveledwindow.ui
> PRECOMPILED_HEADER += LevelEdInclude.h
> 
> # HACK : This is the only way to get QT 4.5 to compile on Snow  
> Leopard. Should be removed once a better version of QT is released.
> CONFIG += x86
> 
> LIBS += ../CommonFramework/libCommonFramework.a
> 
> 
> 
> 
> - Warren
> (warren at wantonhubris.com)

It would seem that your library and Qt are of different archs, ie, one 
of them is i386 and one of them is x86_64.

 You can use the "file" command to interrogate what archs are in the 
static library and what archs are in the Qt libraries.

As far as the "only way to get Qt to compile on 10.6"..

 10.6 is now compiling 64 bit binaries by _default_ which means when 
you compile Qt 4.5.2 you will probably have to be _very_ specific about 
a few items:

  ./configure -debug-and-release -shared -fast -exceptions -stl 
-no-qt3support -prefix /Users/Shared/Toolkits/Qt-4.5.2-Framework -cocoa 
-arch x86 -largefile

would be what I would use. Note that I don't actually have 10.6 
installed but looking else where on the internet it would seem you just 
have to be more explicit about the configure options. Also, you would 
probably have to set the OS X SDK Root (-sdk) in order to compile for 
PPC machines as you will most likely need the 10.5SDK for that.

Just some thoughts.
Mike Jackson