Small touch-ups on build details in experiments.

Still finding some issues with kokkos, latest cuda (13.x), and other
details (e.g., host compiler).

kitsune/experiments/inc/cuda.mk

@@ -1,13 +1,12 @@
 ifneq ($(CUDA_PATH),)
-  CUDA_ARCH?=sm_90
+  CUDA_ARCH?=sm_86
   NVCC=$(CUDA_PATH)/bin/nvcc
   NVCC_C_FLAGS?=-arch=$(CUDA_ARCH)
   NVCC_CXX_FLAGS?=-arch=$(CUDA_ARCH) \
     --no-exceptions \
     --relocatable-device-code=false \
     --expt-extended-lambda \
     --expt-relaxed-constexpr \
-    -ccbin /usr/bin \
     -O$(KITSUNE_OPTLEVEL)
 
   CLANG_CUDA=$(KITSUNE_PREFIX)/bin/clang 

kitsune/experiments/raytracer/makefile

@@ -58,9 +58,9 @@ raytracer-kokkos.hip.${host_arch}: raytracer-kokkos.cpp
 
 # cuda version 
 raytracer-cuda.${host_arch}: raytracer.cu
-	echo $@
-	$(TIME_CMD) $(NVCC) $(NVCC_CXX_FLAGS) -o $@ $<
-	$(FILE_SIZE)
+	@echo $@
+	@$(TIME_CMD) $(NVCC) $(NVCC_CXX_FLAGS) -o $@ $<
+	@$(FILE_SIZE)
 
 # hip version 
 raytracer-hip.${host_arch}: raytracer-hip.cpp
@@ -70,7 +70,7 @@ raytracer-hip.${host_arch}: raytracer-hip.cpp
 
 raytracer-hip.clang.${host_arch}: raytracer-hip.cpp
 	@echo $@
-	$(KIT_CXX) -x hip -v $(HIPCC_CXX_FLAGS) -o $@ $< -L$(ROCM_PATH)/lib -lamdhip64
+	@$(KIT_CXX) -x hip -v $(HIPCC_CXX_FLAGS) -o $@ $< -L$(ROCM_PATH)/lib -lamdhip64
 	@$(FILE_SIZE)
 #####
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