About environnement variables, on ubuntu 16.04.2, with Claymore 9.4,
amdgpu-pro-17.10-414273,
I enjoy those variables settings:
GPU_FORCE_64BIT_PTR=1
GPU_MAX_HEAP_SIZE=100
GPU_USE_SYNC_OBJECTS=1
GPU_MAX_ALLOC_PERCENT=100
GPU_SINGLE_ALLOC_PERCENT=100
and ethdcrminer64 runs like a charm
if I put
GPU_FORCE_64BIT_PTR=0
as advised, it crashes with
segfault at 8 ip 00007f37c1d1ba0c sp 00007f37bdea7d10 error 4 in libamdocl64.so[7f37c161f000+3dfb000]
No problem, it works, but it may be interesting for beginner to know.