Hi, The FindCUDA.cmake module since v3.0 has had a bug because it assumes that when cross compiling that CMAKE_SYSTEM_PROCESSOR will be defined. That definition is documented as optional at http://www.vtk.org/Wiki/CMake_Cross_Compiling, and the module can't work if it happens to be undefined. Attached patch wraps the uses of CMAKE_SYSTEM_PROCESSOR in quotes so that interpolation will lead to the intended behaviour in all cases.
I haven't filed a bug report, per http://www.cmake.org/Wiki/CMake_FAQ#I_found_a_Bug.21_What_should_I_do.3F Thanks, Mark
From ff32fca999767e57b48ec68c30b093207c560a2f Mon Sep 17 00:00:00 2001 From: Mark Abraham <mark.j.abra...@gmail.com> Date: Sun, 4 Jan 2015 14:37:51 +0100 Subject: [PATCH] Fix FindCUDA.cmake assumption about cross-compiling CMAKE_SYSTEM_PROCESSOR is not guaranteed to be defined (per http://www.vtk.org/Wiki/CMake_Cross_Compiling), and when cross compiling where it happens to be undefined, this module was broken. --- Modules/FindCUDA.cmake | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/Modules/FindCUDA.cmake b/Modules/FindCUDA.cmake index 29bb875..55b868e 100644 --- a/Modules/FindCUDA.cmake +++ b/Modules/FindCUDA.cmake @@ -613,7 +613,7 @@ endif() set(CUDA_VERSION_STRING "${CUDA_VERSION}") # Support for arm cross compilation with CUDA 5.5 -if(CUDA_VERSION VERSION_GREATER "5.0" AND CMAKE_CROSSCOMPILING AND ${CMAKE_SYSTEM_PROCESSOR} MATCHES "arm" AND EXISTS "${CUDA_TOOLKIT_ROOT_DIR}/targets/armv7-linux-gnueabihf") +if(CUDA_VERSION VERSION_GREATER "5.0" AND CMAKE_CROSSCOMPILING AND "${CMAKE_SYSTEM_PROCESSOR}" MATCHES "arm" AND EXISTS "${CUDA_TOOLKIT_ROOT_DIR}/targets/armv7-linux-gnueabihf") set(CUDA_TOOLKIT_TARGET_DIR "${CUDA_TOOLKIT_ROOT_DIR}/targets/armv7-linux-gnueabihf" CACHE PATH "Toolkit target location.") else() set(CUDA_TOOLKIT_TARGET_DIR "${CUDA_TOOLKIT_ROOT_DIR}" CACHE PATH "Toolkit target location.") @@ -621,7 +621,7 @@ endif() mark_as_advanced(CUDA_TOOLKIT_TARGET_DIR) # Target CPU architecture -if(CUDA_VERSION VERSION_GREATER "5.0" AND CMAKE_CROSSCOMPILING AND ${CMAKE_SYSTEM_PROCESSOR} MATCHES "arm") +if(CUDA_VERSION VERSION_GREATER "5.0" AND CMAKE_CROSSCOMPILING AND "${CMAKE_SYSTEM_PROCESSOR}" MATCHES "arm") set(_cuda_target_cpu_arch_initial "ARM") else() set(_cuda_target_cpu_arch_initial "") -- 2.2.1
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