Compiler warnings fix 2 (#1801)

* Changes to device code

* Changes to src/misc

* Changes to graph

* src/include changes

* src/transport changes

* changes in init, enqueue, proxy

* Changes to CMakeLists.txt

* Additional changes to device code

* Additional changes to net.cc

* adding 'compiler warning' tag to ease upstream merge'

* typo correction

* Addessing comments

* Additional changes for new commits

[ROCm/rccl commit: 3f8cac388e]

projects/rccl/src/include/gdrwrap.h

@@ -180,11 +180,11 @@ static gdr_t ncclGdrInit() {
 
 template <typename T>
 static ncclResult_t ncclGdrCudaCalloc(T** ptr, T** devPtr, size_t nelem, void** gdrHandle, hipStream_t stream) {
-  gdr_info_t info;
+  // gdr_info_t info; // unused variable - compiler warning
   size_t mapSize;
-  gdr_mh_t mh;
+  // gdr_mh_t mh;     // unused variable - compiler warning
   char *devMem;
-  void *gdrMap;
+  // void *gdrMap;    // unused variable - compiler warning
 
   mapSize = ncclSizeOfT<T>()*nelem;
 
@@ -216,7 +216,7 @@ static ncclResult_t ncclGdrCudaCalloc(T** ptr, T** devPtr, size_t nelem, void**
 
 template <typename T>
 static ncclResult_t ncclGdrCudaCopy(void *gdrHandle, T* dst, T* src, size_t nelem) {
-  gdr_mem_desc_t *md = (gdr_mem_desc_t*)gdrHandle;
+  //gdr_mem_desc_t *md = (gdr_mem_desc_t*)gdrHandle; // unused variable - compiler warning
   memcpy(dst, src, nelem*sizeof(T));
   return ncclSuccess;
 }

projects/rccl/src/include/rccl_float8.h

@@ -73,11 +73,6 @@ inline __device__  rccl_float8 hadd(rccl_float8 x, rccl_float8 y)
     u.i16_vec = __builtin_amdgcn_cvt_scalef32_pk_fp8_f16(v1, v1, /* scale */ 1.f, 0);
     return u.fp8[0];
 #elif __HIP_DEVICE_COMPILE__ && defined(__gfx942__)
-     union
-    {
-        uint32_t i32val;
-        rccl_float8 i8val[4];
-    } val;
 
     float2_t v;
     uint32_t ival = 0;
@@ -235,7 +230,7 @@ namespace rocblas_hip_f8_impl
         else
             x = reinterpret_cast<uint16_t&>(_x);
 
-        uint32_t y, head, mantissa;
+        uint32_t head, mantissa;
         int      exponent, bias;
         uint32_t sign;