From 81f63533180dd34fa6578c6c18a060aa73242d75 Mon Sep 17 00:00:00 2001
From: Abishek Gopal <agopal@ucar.edu>
Date: Mon, 3 Feb 2025 11:25:06 -0700
Subject: [PATCH] Adding option to keep nvhpc GPU builds bit-identical with CPU
 builds

---
 Makefile | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Makefile b/Makefile
index 1d31bb2843..48df506853 100644
--- a/Makefile
+++ b/Makefile
@@ -158,6 +158,8 @@ nvhpc:   # BUILDTARGET NVIDIA HPC SDK
 	"FFLAGS_OMP = -mp" \
 	"CFLAGS_OMP = -mp" \
 	"FFLAGS_ACC = -Mnofma -acc -gpu=cc70,cc80 -Minfo=accel" \
+	"FFLAGS_NVHPC_ACC_BFB = -Mnofma -gpu=math_uniform" \
+	"FFLAGS_NVHPC_BFB = -Mnofma" \
 	"CFLAGS_ACC =" \
 	"PICFLAG = -fpic" \
 	"BUILD_TARGET = $(@)" \
@@ -850,6 +852,14 @@ ifeq "$(OPENACC)" "true"
         LDFLAGS += $(FFLAGS_ACC)
 endif #OPENACC IF
 
+ifeq "$(NVHPC_BFB)" "true"
+        ifeq "$(OPENACC)" "true"
+		FFLAGS += ${FFLAGS_NVHPC_ACC_BFB}
+        else
+		FFLAGS += ${FFLAGS_NVHPC_BFB}
+        endif
+endif #NVHPC IF
+
 ifeq "$(OPENMP_OFFLOAD)" "true"
 	FFLAGS += $(FFLAGS_GPU)
 	CFLAGS += $(FFLAGS_GPU)