On Tuesday 29 Nov 2011 10:50:13 AM Mathias Gaunard wrote: > On 11/28/2011 05:58 PM, Kishore Jonnalagadda wrote: > > I have recently moved to using 64bit Kubuntu Oneiric when supports > > multiarch. I understand that building 32 bit from my 64 install is as > > simple as adding the "-m32" option to gcc. Asking cmake to add that > > flag is easy but i don't know how to ask cmake to only look for 32 bit > > libraries in FindPackage() class. I have all the 32bit library (Qt) > > dependencies installed and they are in /usr/lib/i386-linux-gnu. By > > adding the "-m32" option compilation succeeds but as expected linking > > fails complaining that i am trying to link to 64 bit libraries. > > > > So, how do i ask cmake to look for 32bit libs? > > I personally haven't found a good solution for this either. > > What I currently do is the following > set(CMAKE_SYSTEM_PROCESSOR i386) > set(CMAKE_SYSTEM_LIBRARY_PATH /lib32 /usr/lib32 /usr/local/lib32) > set(FIND_LIBRARY_USE_LIB64_PATHS OFF) > set(CMAKE_IGNORE_PATH /lib /usr/lib /usr/local/lib) > > Unfortunately the CMAKE_IGNORE_PATH is required. I created a bug about this.
Thanks for the input. In the meanwhile I tried to work past this by setting it up as a cross build using a toolchain files. However, i hit a road block when i discovered that not all libraries are multiarch friendly. In my case, qtmobility packages install to /usr/lib directly. I'm not ready yet to take the road of building/packaging qtmobility as well. So i guess, i will now have to setup a VM for 32 bit builds. But thanks for the tip! :) -- Cheers! Kishore -- Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Follow this link to subscribe/unsubscribe: http://www.cmake.org/mailman/listinfo/cmake
