[CMake] 32-bit mode on 64-bit machine

[Glenn Coombs]

I do exactly that for my project using these lines:

if(UNIX)
    # only build 32-bit binaries
    add_definitions(                        -m32)
    set(CMAKE_EXE_LINKER_FLAGS                "${CMAKE_EXE_LINKER_FLAGS}
-m32")
    set(CMAKE_SHARED_LIBRARY_C_FLAGS        "${CMAKE_SHARED_LIBRARY_C_FLAGS}
-m32")
    set(CMAKE_SHARED_LIBRARY_CXX_FLAGS
"${CMAKE_SHARED_LIBRARY_CXX_FLAGS} -m32")
endif()


I do it unconditionally but you could easily add an option variable to turn
this behaviour on or off accordingly.
--
Glenn


On 26 May 2011 17:54, Sara Rolfe <smrolfe at u.washington.edu> wrote:

> Hello,
>
> I'd like to force a 64-bit machine to build a 32-bit program.  Can I
> control this using CMake?
>
> Thanks,
> Sara
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