net/octeontx: fix build for gcc < 4.6

-Ofast option supported starting from gcc4.6 [1], for older versions
using "-O3 -ffast-math" instead.

[1] build error:
  CC octeontx_rxtx.o
  cc1: error: invalid option argument ‘-Ofast’

Fixes: 9e747589bd4c ("net/octeontx: add packet transmit burst function")

Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
Acked-by: Santosh Shukla <santosh.shukla@caviumnetworks.com>

diff --git a/drivers/net/octeontx/Makefile b/drivers/net/octeontx/Makefile
index 0a8775a..30fb459 100644 (file)
--- a/drivers/net/octeontx/Makefile
+++ b/drivers/net/octeontx/Makefile
@@ -58,8 +58,16 @@ SRCS-$(CONFIG_RTE_LIBRTE_OCTEONTX_PMD) += octeontx_ethdev.c
 
 ifeq ($(CONFIG_RTE_TOOLCHAIN_GCC),y)
 CFLAGS_octeontx_rxtx.o += -fno-prefetch-loop-arrays
+
+ifeq ($(shell test $(GCC_VERSION) -ge 46 && echo 1), 1)
+CFLAGS_octeontx_rxtx.o += -O3 -Ofast
+else
+CFLAGS_octeontx_rxtx.o += -O3 -ffast-math
 endif
+
+else
 CFLAGS_octeontx_rxtx.o += -O3 -Ofast
+endif
 
 LDLIBS += -lrte_eal -lrte_mbuf -lrte_mempool -lrte_ring
 LDLIBS += -lrte_ethdev -lrte_net -lrte_kvargs