cmake, gcc, cuda and -m32 wtf

Posted by Nils on Stack Overflow See other posts from Stack Overflow or by Nils
Published on 2010-04-11T15:20:53Z Indexed on 2010/04/11 15:23 UTC
Read the original article Hit count: 399

Filed under:

cmake

|

cuda

|

macosx

Hi all

I figured out that CUDA does not work in 64bit mode on my mac (or couldn't get it running so far). Therefore I decided to compile everything for 32bit.

I use cmake 2.8 and added the following options

add_definitions(-Wall -m32)
set(CUDA_64_BIT_DEVICE_CODE OFF)
set(CMAKE_MODULE_LINKER_FLAGS -m32)

However when it tries to link it it does something like this:

/usr/bin/c++    -mmacosx-version-min=10.6 -Wl,-search_paths_first -headerpad_max_install_names  CMakeFiles/SimpleTestsCUDA.dir/BlockMatrix.cpp.o CMakeFiles/SimpleTestsCUDA.dir/Matrix.cpp.o ./SimpleTestsCUDA_generated_SimpleTests.cu.o ./SimpleTestsCUDA_generated_BlockMatrix.cu.o  -o SimpleTestsCUDA  /usr/local/cuda/lib/libcudart.dylib /usr/local/cuda/lib/libcuda.dylib

Which fails with a lot of "file is not of required architecture" warnings from ld. Now if I add manually -m32 to the command above it works. However I have no idea how to teach cmake to add -m32 to every gcc (or ld) invocation. So far it does it for nvcc and gcc, but not for linking..

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