Interestingly, the changes to my toolchain made below work:
set( CMAKE_SYSTEM_NAME Linux ) set( CMAKE_SYSTEM_VERSION 1 ) set( CMAKE_SYSTEM_PROCESSOR i386 ) set( CMAKE_C_COMPILER gcc-4.9 ) set( CMAKE_CXX_COMPILER g++-4.9 ) set( CMAKE_C_COMPILER_ARG1 -m32 ) set( CMAKE_CXX_COMPILER_ARG1 -m32 ) The only change here is that I'm using CMAKE_C_COMPILER_ARG1 and CMAKE_CXX_COMPILER_ARG1. These are not documented anywhere. I only found out about them from a post from Bill Hoffman (which I have lost the URL to). Is this the correct toolchain? At least find_package() is properly finding 32-bit libraries now, so I am happy. Should CMAKE_SYSTEM_PROCESSOR be i386 or i686? On Mon, Apr 24, 2017 at 12:22 PM, Robert Dailey <rcdailey.li...@gmail.com> wrote: > The output is: > > x86_64-linux-gnu > > How can I tell CMake to look for 32-bit libraries? I would like to > force this from my toolchain file (which I posted a few minutes ago) > > On Mon, Apr 24, 2017 at 10:16 AM, Andrew Fuller <aful...@teradici.com> wrote: >> Where did the library get installed on your system? What's the value of >> CMAKE_<LANG>_LIBRARY_ARCHITECTURE? >> >> >> Since you're on a 64-bit system, I'd expect CMake to be looking for 64-bit >> libraries unless you've told it otherwise. >> >> ________________________________ >> From: CMake <cmake-boun...@cmake.org> on behalf of Robert Dailey >> <rcdailey.li...@gmail.com> >> Sent: April 24, 2017 7:54:18 AM >> To: CMake; CMake Developers >> Subject: Re: [CMake] Trouble with FindPNG module >> >> Sorry to bump; any info on this? I'm completely blocked :-( >> >> On Fri, Apr 21, 2017 at 4:48 PM, Robert Dailey <rcdailey.li...@gmail.com> >> wrote: >>> I'm running CMake 3.8.0 on Ubuntu 14. I invoke the following: >>> >>> find_package(PNG REQUIRED) >>> >>> Which gives me the output in CMake: >>> >>> Could NOT find PNG (missing: PNG_LIBRARY) (found version "1.2.50") >>> >>> The CMakeCache.txt file has these variables set: >>> >>> PNG_LIBRARY_DEBUG:FILEPATH=PNG_LIBRARY_DEBUG-NOTFOUND >>> PNG_LIBRARY_RELEASE:FILEPATH=PNG_LIBRARY_RELEASE-NOTFOUND >>> PNG_PNG_INCLUDE_DIR:PATH=/usr/include >>> >>> So it found the headers, but not the libs. Why did it not find the >>> libs? Note that my version of Ubuntu is 64-bit, and I've installed the >>> 32-bit libs like so: >>> >>> $ sudo apt-get install libpng12-dev:i386 >>> >>> Would the find module be confused because it is trying to find the >>> 64-bit library? What's the issue? >> -- >> >> Powered by www.kitware.com >> >> Please keep messages on-topic and check the CMake FAQ at: >> http://www.cmake.org/Wiki/CMake_FAQ >> >> Kitware offers various services to support the CMake community. For more >> information on each offering, please visit: >> >> CMake Support: http://cmake.org/cmake/help/support.html >> CMake Consulting: http://cmake.org/cmake/help/consulting.html >> CMake Training Courses: http://cmake.org/cmake/help/training.html >> >> Visit other Kitware open-source projects at >> http://www.kitware.com/opensource/opensource.html >> >> Follow this link to subscribe/unsubscribe: >> http://public.kitware.com/mailman/listinfo/cmake -- Powered by www.kitware.com Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Kitware offers various services to support the CMake community. For more information on each offering, please visit: CMake Support: http://cmake.org/cmake/help/support.html CMake Consulting: http://cmake.org/cmake/help/consulting.html CMake Training Courses: http://cmake.org/cmake/help/training.html Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Follow this link to subscribe/unsubscribe: http://public.kitware.com/mailman/listinfo/cmake