tuner: Fix missing config.h include

Without this, we were incorrectly including neuron headers instead of
CUDA ones when HAVE_CUDA was not defined. Also fail compilation if
neither definition was found rather than having a fall-through case.

Signed-off-by: Raghu Raja <[email protected]>

Author: rajachan

include/nccl-headers/error.h

@@ -7,7 +7,7 @@
 
 #if HAVE_CUDA
 #include "nccl-headers/nvidia/err.h"
-#else
+#elif HAVE_NEURON
 #include "nccl-headers/neuron/error.h"
 #endif
 

include/nccl_ofi_tuner.h

@@ -1,6 +1,8 @@
 #ifndef NCCL_OFI_TUNER_H_
 #define NCCL_OFI_TUNER_H_
 
+#include "config.h"
+
 #include <linux/limits.h>
 #include <float.h>
 #include "nccl-headers/nvidia/tuner.h"