Print NCCL version at start

src/common.cu

@@ -915,6 +915,7 @@ int main(int argc, char* argv[]) {
        NCCLCHECK(ncclGroupEnd());
      }
 
+     PRINT("# NCCL Tests compiled with NCCL %d.%d\n", NCCL_MAJOR, NCCL_MINOR);
      PRINT("# Using devices\n");
      for (int p=0; p<nProcs; p++) {
        if (p == proc) {

src/nccl1_compat.h

@@ -8,6 +8,9 @@
 #define NCCL1_COMPAT_H
 
 #ifndef NCCL_MAJOR // NCCL 1.x
+#define NCCL_MAJOR 1
+#define NCCL_MINOR 0
+
 #define ncclNumOps nccl_NUM_OPS
 #define ncclNumTypes nccl_NUM_TYPES