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Cuda driver api function cuGetErrorString is available in version 6.0 and higher. Currently, when the driver that is used does not contain this function, the libgomp nvptx plugin will not build (PLUGIN_NVPTX_DYNAMIC == 0) or run (PLUGIN_NVPTX_DYNAMIC == 1). This patch fixes this problem by testing for the presence of the function, and handling absence. Build on x86_64 with nvptx accelerator and reg-tested libgomp, both with and without --without-cuda-driver. 2018-08-08 Tom de Vries <tdevries@suse.de> * plugin/cuda-lib.def (cuGetErrorString): Use CUDA_ONE_CALL_MAYBE_NULL. * plugin/plugin-nvptx.c (cuda_error): Handle if cuGetErrorString is not present. From-SVN: r263407
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