[dpdk-dev] [PATCH v2 1/3] net/thunderx: disable pmd for older compilers

[Ferruh Yigit <ferruh.yigit@intel.com>]

Disable for gcc < 4.7 and icc <= 14.0

PMD uses some compiler builtins and new compiler options. Tested with
gcc 4.5.1 and following were not supported:

option:
-Ofast

macros:
_Static_assert

__ORDER_LITTLE_ENDIAN__
__ORDER_BIG_ENDIAN__
__BYTE_ORDER__

__atomic_fetch_add
__ATOMIC_ACQUIRE
__atomic_load_n
__ATOMIC_RELAXED
__atomic_store_n
__ATOMIC_RELEASE

It is not easy to fix all in PMD, disabling PMD for older compilers.

Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
---
 drivers/net/thunderx/Makefile            | 15 +++++++++++++++
 mk/toolchain/gcc/rte.toolchain-compat.mk |  4 ++++
 mk/toolchain/icc/rte.toolchain-compat.mk |  4 ++++
 3 files changed, 23 insertions(+)

diff --git a/drivers/net/thunderx/Makefile b/drivers/net/thunderx/Makefile
index 706250b..f2acfcb 100644
--- a/drivers/net/thunderx/Makefile
+++ b/drivers/net/thunderx/Makefile
@@ -60,8 +60,23 @@ SRCS-$(CONFIG_RTE_LIBRTE_THUNDERX_NICVF_PMD) += nicvf_ethdev.c
 SRCS-$(CONFIG_RTE_LIBRTE_THUNDERX_NICVF_PMD) += nicvf_bsvf.c
 SRCS-$(CONFIG_RTE_LIBRTE_THUNDERX_NICVF_PMD) += nicvf_svf.c
 
+# GCC
 ifeq ($(CONFIG_RTE_TOOLCHAIN_GCC),y)
 CFLAGS_nicvf_rxtx.o += -fno-prefetch-loop-arrays
+
+# Disable PMD for gcc < 4.7 in  mk/toolchain/gcc/rte.toolchain-compat.mk
+ifeq ($(shell test $(GCC_VERSION) -lt 47 && echo 1), 1)
+$(warning thunderx pmd not supported by gcc < 4.7)
+endif
+
+# ICC
+else ifeq ($(CONFIG_RTE_TOOLCHAIN_ICC),y)
+
+# Disable PMD for icc <= 14.0 in  mk/toolchain/gcc/rte.toolchain-compat.mk
+ifeq ($(shell test $(ICC_MAJOR_VERSION) -le 14 && echo 1), 1)
+$(warning thunderx pmd not supported by icc <= 14.0)
+endif
+
 endif
 CFLAGS_nicvf_rxtx.o += -Ofast
 
diff --git a/mk/toolchain/gcc/rte.toolchain-compat.mk b/mk/toolchain/gcc/rte.toolchain-compat.mk
index 6eed20c..fff14e1 100644
--- a/mk/toolchain/gcc/rte.toolchain-compat.mk
+++ b/mk/toolchain/gcc/rte.toolchain-compat.mk
@@ -89,4 +89,8 @@ else
 	ifeq ($(shell test $(GCC_VERSION) -lt 42 && echo 1), 1)
 		MACHINE_CFLAGS := $(filter-out -march% -mtune% -msse%,$(MACHINE_CFLAGS))
 	endif
+
+	ifeq ($(shell test $(GCC_VERSION) -lt 47 && echo 1), 1)
+		CONFIG_RTE_LIBRTE_THUNDERX_NICVF_PMD=n
+	endif
 endif
diff --git a/mk/toolchain/icc/rte.toolchain-compat.mk b/mk/toolchain/icc/rte.toolchain-compat.mk
index 4134466..2d0e54b 100644
--- a/mk/toolchain/icc/rte.toolchain-compat.mk
+++ b/mk/toolchain/icc/rte.toolchain-compat.mk
@@ -64,6 +64,10 @@ else
 		MACHINE_CFLAGS := $(patsubst -march=core-avx2,-xCORE-AVX2,$(MACHINE_CFLAGS))
 		# remove westmere flags
 		MACHINE_CFLAGS := $(filter-out -mpclmul -maes,$(MACHINE_CFLAGS))
+
+		ifeq ($(shell test $(ICC_MAJOR_VERSION) -le 14 && echo 1), 1)
+			CONFIG_RTE_LIBRTE_THUNDERX_NICVF_PMD=n
+		endif
 	endif
 	# if icc version == 12.0
 	ifeq ($(shell test $(ICC_MAJOR_VERSION) -eq 12 && test $(ICC_MINOR_VERSION) -eq 0 && echo 1), 1)
-- 
2.9.3