Fix build for nvc++

[gshipman]

lanl@localhost:~/b1/benchmarks/branson/build$ nvc++ --version

nvc++ 26.1-0 linuxarm64 target on aarch64 Linux -tp generic
NVIDIA Compilers and Tools
Copyright (c) 2026, NVIDIA CORPORATION & AFFILIATES. All rights reserved.

lanl@localhost:~/b1/benchmarks/branson/build$ git diff
diff --git a/src/buffer.h b/src/buffer.h
index 61b5999..df99038 100644
--- a/src/buffer.h
+++ b/src/buffer.h
@@ -14,6 +14,7 @@

#include <mpi.h>
#include
+#include

template class Buffer {

diff --git a/src/constants.h b/src/constants.h
index 8198b46..4ecb920 100644
--- a/src/constants.h
+++ b/src/constants.h
@@ -11,6 +11,7 @@

#ifndef constants_h_
#define constants_h_
+#include

[alexrlongne]

Sorry, what are the includes added here needed for newer nvcc compilation?

[gshipman]

@alexrlongne , sorry, this diff got munged. This was on a test system I no longer have access to. In any event, I was getting a compile failure, (uint32_t undefined). The fix was to "#include cstdint"
Thx

[alexrlongne]

Ah, got it, thanks! I'll add that to those two files.