+#
+# This file is part of the GROMACS molecular simulation package.
+#
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+# Mark Abraham, David van der Spoel, Berk Hess, and Erik Lindahl,
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+
# Manage CUDA nvcc compilation configuration, try to be smart to ease the users'
# pain as much as possible:
# - use the CUDA_HOST_COMPILER if defined by the user, otherwise
# On *nix force icc in gcc 4.4 compatibility mode with CUDA 3.2/4.0 and
# gcc 4.5 compatibility mode with later CUDA versions. This is needed
- # as even with icc use as host compiler, when icc's gcc compatibility
+ # as even with icc used as host compiler, when icc's gcc compatibility
# mode is higher than the max gcc version officially supported by CUDA,
# nvcc will freak out.
if (UNIX AND CMAKE_C_COMPILER_ID MATCHES "Intel" AND
mark_as_advanced(CUDA_HOST_COMPILER CUDA_HOST_COMPILER_OPTIONS)
endif()
- # on Linux we need to add -fPIC when building shared gmx libs
- # Note: will add -fPIC for any compiler that supports it as it shouldn't hurt
- if(BUILD_SHARED_LIBS)
- GMX_TEST_CXXFLAG(CXXFLAG_FPIC "-fPIC" _FPIC_NVCC_FLAG)
- if(_FPIC_NVCC_FLAG)
- set(CUDA_HOST_COMPILER_OPTIONS "${CUDA_HOST_COMPILER_OPTIONS}-Xcompiler;${_FPIC_NVCC_FLAG}")
- endif()
+ if(APPLE AND CMAKE_C_COMPILER_ID MATCHES "GNU")
+ # Some versions of gcc-4.8 and gcc-4.9 produce errors (in particular on OS X)
+ # if we do not use -D__STRICT_ANSI__. It is harmless, so we might as well add it for all versions.
+ set(CUDA_HOST_COMPILER_OPTIONS "${CUDA_HOST_COMPILER_OPTIONS}-D__STRICT_ANSI__;")
+ endif()
+
+ # the legacy CUDA kernels have been dropped, warn with CUDA 4.0
+ if (CUDA_VERSION VERSION_EQUAL "4.0")
+ message(WARNING "The legacy GPU kernels optimized for older CUDA compilers, including the detected version 4.0, have been removed. To avoid performance loss, we strongly recommend upgrading to a newer CUDA toolkit.
+ ")
endif()
# Set the CUDA GPU architectures to compile for:
# - with CUDA >v4.2 compute capability 2.0, 2.1 is, but 3.0 is not supported:
# => compile sm_20, sm_21 cubin, and compute_20 PTX
- # - with CUDA >=4.2 compute capabity <=3.0 is supported:
+ # - with CUDA >=4.2 compute capability <=3.0 is supported:
# => compile sm_20, sm_21, sm_30 cubin, and compute_30 PTX
- # - with CUDA 5.0 compute capabity 3.5 is supported, but generating code
- # optimized for sm_35 results in lower performance than with sm_30.
+ # - with CUDA 5.0 and later compute capability 3.5 is supported
+ # => compile sm_20, sm_21, sm_30, sm_35 cubin, and compute_35 PTX
if(CUDA_VERSION VERSION_LESS "4.2")
set(_CUDA_ARCH_STR "-gencode;arch=compute_20,code=sm_20;-gencode;arch=compute_20,code=sm_21;-gencode;arch=compute_20,code=compute_20")
- else()
+ elseif(CUDA_VERSION VERSION_LESS "5.0")
set(_CUDA_ARCH_STR "-gencode;arch=compute_20,code=sm_20;-gencode;arch=compute_20,code=sm_21;-gencode;arch=compute_30,code=sm_30;-gencode;arch=compute_30,code=compute_30")
+ else()
+ set(_CUDA_ARCH_STR "-gencode;arch=compute_20,code=sm_20;-gencode;arch=compute_20,code=sm_21;-gencode;arch=compute_30,code=sm_30;-gencode;arch=compute_35,code=sm_35;-gencode;arch=compute_35,code=compute_35")
endif()
# finally set the damn flags