Fix the slowness in nvidia-bluefield SDK makefile from recursive variable expansion (sonic-net#39)

Author: tirupatihemanth

platform/nvidia-bluefield/recipes/sdk.mk

@@ -71,11 +71,11 @@ SDK_ONLINE_TARGETS =
 
 # OFED and derived packages
 
-OFED_VER_SHORT = $(call get_sdk_package_version_short,"ofed")
-OFED_VER_FULL = $(call get_sdk_package_version_full,"ofed")
-OFED_KERNEL_VER_SHORT = $(call get_sdk_package_version_short,"mlnx-ofed-kernel")
-OFED_KERNEL_VER_FULL = $(call get_sdk_package_version_full,"mlnx-ofed-kernel")
-MLNX_TOOLS_VER = $(call get_sdk_package_version_full,"mlnx-tools")
+OFED_VER_SHORT := $(call get_sdk_package_version_short,"ofed")
+OFED_VER_FULL := $(call get_sdk_package_version_full,"ofed")
+OFED_KERNEL_VER_SHORT := $(call get_sdk_package_version_short,"mlnx-ofed-kernel")
+OFED_KERNEL_VER_FULL := $(call get_sdk_package_version_full,"mlnx-ofed-kernel")
+MLNX_TOOLS_VER := $(call get_sdk_package_version_full,"mlnx-tools")
 
 MLNX_TOOLS = mlnx-tools_$(MLNX_TOOLS_VER)_arm64.deb
 $(MLNX_TOOLS)_SRC_PATH = $(PLATFORM_PATH)/sdk-src/ofed
@@ -102,7 +102,7 @@ SDK_DEBS += $(MLNX_TOOLS) $(OFED_KERNEL_UTILS)
 SDK_SRC_TARGETS += $(MLNX_TOOLS)
 
 # MLNX iproute2
-MLNX_IPROUTE2_VER = $(call get_sdk_package_version_full,"mlnx-iproute2")
+MLNX_IPROUTE2_VER := $(call get_sdk_package_version_full,"mlnx-iproute2")
 
 MLNX_IPROUTE2 = mlnx-iproute2_$(MLNX_IPROUTE2_VER)_arm64.deb
 $(MLNX_IPROUTE2)_SRC_PATH = $(PLATFORM_PATH)/sdk-src/mlnx-iproute2
@@ -118,7 +118,7 @@ SDK_SRC_TARGETS += $(MLNX_IPROUTE2)
 
 # RDMA and derived packages
 
-RDMA_CORE_VER = $(call get_sdk_package_version_full,"rdma-core")
+RDMA_CORE_VER := $(call get_sdk_package_version_full,"rdma-core")
 RDMA_CORE = rdma-core_${RDMA_CORE_VER}_${CONFIGURED_ARCH}.deb
 $(RDMA_CORE)_SRC_PATH = $(PLATFORM_PATH)/sdk-src/rdma
 $(RDMA_CORE)_RDEPENDS = $(LIBNL3)
@@ -173,7 +173,7 @@ endif
 
 # DPDK and derived packages
 
-DPDK_VER = $(call get_sdk_package_version_full,"dpdk")
+DPDK_VER := $(call get_sdk_package_version_full,"dpdk")
 
 DPDK = mlnx-dpdk_${DPDK_VER}_${CONFIGURED_ARCH}.deb
 $(DPDK)_SRC_PATH = $(PLATFORM_PATH)/sdk-src/dpdk
@@ -195,7 +195,7 @@ SDK_SRC_TARGETS += $(DPDK)
 
 # RXP compiler and derived packages
 
-RXPCOMPILER_VER = $(call get_sdk_package_version_full,"rxp-tools")
+RXPCOMPILER_VER := $(call get_sdk_package_version_full,"rxp-tools")
 
 RXPCOMPILER = rxp-compiler_$(RXPCOMPILER_VER)_arm64.deb
 $(RXPCOMPILER)_SRC_PATH = $(PLATFORM_PATH)/sdk-src/rxp-compiler
@@ -213,7 +213,7 @@ SDK_SRC_TARGETS += $(RXPCOMPILER)
 
 # GRPC and derived packages
 
-LIBGRPC_VER = $(call get_sdk_package_version_full,"grpc")
+LIBGRPC_VER := $(call get_sdk_package_version_full,"grpc")
 
 LIBGRPC_DEV = libgrpc-dev_$(LIBGRPC_VER)_arm64.deb
 $(LIBGRPC_DEV)_SRC_PATH = $(PLATFORM_PATH)/sdk-src/grpc
@@ -225,8 +225,8 @@ SDK_SRC_TARGETS += $(LIBGRPC_DEV)
 
 # DOCA and derived packages
 
-DOCA_VERSION = $(call get_sdk_package_version_full,"doca")
-DOCA_DEB_VERSION = $(DOCA_VERSION)-1
+DOCA_VERSION := $(call get_sdk_package_version_full,"doca")
+DOCA_DEB_VERSION := $(DOCA_VERSION)-1
 
 DOCA_COMMON = doca-sdk-common_${DOCA_DEB_VERSION}_${CONFIGURED_ARCH}.deb
 $(DOCA_COMMON)_SRC_PATH = $(PLATFORM_PATH)/sdk-src/doca
@@ -284,7 +284,7 @@ SONIC_ONLINE_DEBS += $(DOCA_DEBS) $(DOCA_DEV_DEBS)
 endif
 
 # hw-steering packages, needed for doca-flow runtime
-NV_HWS_VERSION = $(call get_sdk_package_version_full,"nv_hws")
+NV_HWS_VERSION := $(call get_sdk_package_version_full,"nv_hws")
 
 LIB_NV_HWS = libnvhws1_${NV_HWS_VERSION}_${CONFIGURED_ARCH}.deb
 $(LIB_NV_HWS)_SRC_PATH = $(PLATFORM_PATH)/sdk-src/nv_hws
@@ -306,7 +306,7 @@ export LIB_NV_HWS LIB_NV_HWS_DEV
 
 # SDN Appliance
 
-SDN_APPL_VER=$(call get_sdk_package_version_full,"nasa")
+SDN_APPL_VER:=$(call get_sdk_package_version_full,"nasa")
 SDN_APPL = sdn-appliance_${SDN_APPL_VER}_${CONFIGURED_ARCH}.deb
 $(SDN_APPL)_SRC_PATH = $(PLATFORM_PATH)/sdk-src/sdn
 $(SDN_APPL)_RDEPENDS = $(DOCA_COMMON) $(DOCA_DEBS) $(MLNX_TOOLS) $(OFED_KERNEL_UTILS) $(MLNX_IPROUTE2)