-----Original Message----- > Date: Thu, 6 Apr 2017 13:14:26 +0100 > From: Ferruh Yigit <ferruh.yi...@intel.com> > To: Jerin Jacob <jerin.ja...@caviumnetworks.com>, Bruce Richardson > <bruce.richard...@intel.com>, Harry van Haaren > <harry.van.haa...@intel.com>, Thomas Monjalon <thomas.monja...@6wind.com> > Cc: dev@dpdk.org, Ferruh Yigit <ferruh.yi...@intel.com> > Subject: [PATCH 1/3] net/thunderx: disable pmd for gcc < 4.7 > X-Mailer: git-send-email 2.8.4 > > 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 gcc version < 4.7 > > Signed-off-by: Ferruh Yigit <ferruh.yi...@intel.com>
Acked-by: Jerin Jacob <jerin.ja...@caviumnetworks.com> > --- > drivers/net/thunderx/Makefile | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/drivers/net/thunderx/Makefile b/drivers/net/thunderx/Makefile > index 706250b..0b9f0a2 100644 > --- a/drivers/net/thunderx/Makefile > +++ b/drivers/net/thunderx/Makefile > @@ -62,6 +62,14 @@ SRCS-$(CONFIG_RTE_LIBRTE_THUNDERX_NICVF_PMD) += nicvf_svf.c > > ifeq ($(CONFIG_RTE_TOOLCHAIN_GCC),y) > CFLAGS_nicvf_rxtx.o += -fno-prefetch-loop-arrays > + > +# Disable PMD for gcc < 4.7 > +ifeq ($(shell test $(GCC_VERSION) -lt 47 && echo 1), 1) > +$(warning thunderx pmd not supported by gcc < 4.7) > +LIB = > +SRC-y = > +endif > + > endif > CFLAGS_nicvf_rxtx.o += -Ofast > > -- > 2.9.3 >
