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Add a workaround for incorrect CUDA_HOST_COMPILER setting #32

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Merged
merged 1 commit into from
Mar 28, 2013
Merged

Add a workaround for incorrect CUDA_HOST_COMPILER setting #32

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18 changes: 18 additions & 0 deletions cmake/pcl_find_cuda.cmake
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Original file line number Diff line number Diff line change
@@ -1,4 +1,16 @@
# Find CUDA


# Recent versions of cmake set CUDA_HOST_COMPILER to CMAKE_C_COMPILER which
# on OSX defaults to clang (/usr/bin/cc), but this is not a supported cuda
# compiler. So, here we will preemptively set CUDA_HOST_COMPILER to gcc if
# that compiler exists in /usr/bin. This will not override an existing cache
# value if the user has passed CUDA_HOST_COMPILER on the command line.
if (NOT DEFINED CUDA_HOST_COMPILER AND CMAKE_C_COMPILER_ID STREQUAL "Clang" AND EXISTS /usr/bin/gcc)
set(CUDA_HOST_COMPILER /usr/bin/gcc CACHE FILEPATH "Host side compiler used by NVCC")
message(STATUS "Setting CMAKE_HOST_COMPILER to /usr/bin/gcc instead of ${CMAKE_C_COMPILER}. See http://dev.pointclouds.org/issues/979")
endif()

set(CUDA_FIND_QUIETLY TRUE)
find_package(CUDA 4)

Expand Down Expand Up @@ -30,4 +42,10 @@ if(CUDA_FOUND)
include(${PCL_SOURCE_DIR}/cmake/CudaComputeTargetFlags.cmake)
APPEND_TARGET_ARCH_FLAGS()

# Send a warning if CUDA_HOST_COMPILER is set to a compiler that is known
# to be unsupported.
if (CUDA_HOST_COMPILER STREQUAL CMAKE_C_COMPILER AND CMAKE_C_COMPILER_ID STREQUAL "Clang")
message(WARNING "CUDA_HOST_COMPILER is set to an unsupported compiler: ${CMAKE_C_COMPILER}. See http://dev.pointclouds.org/issues/979")
endif()

endif()