From: Kevin Traynor Date: Thu, 14 May 2020 13:18:57 +0000 (+0100) Subject: build: disable gcc 10 zero-length-bounds warning X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=cfacbcb5a23bc26cb913528c372adddabbb33ca1;p=dpdk.git build: disable gcc 10 zero-length-bounds warning gcc 10 issues warnings about the use of rearm_data marker from struct rte_mbuf. e.g. ../drivers/net/enic/enic_rxtx_vec_avx2.c: In function ‘rx_one’: ../drivers/net/enic/enic_rxtx_vec_avx2.c:21:2: warning: array subscript 0 is outside the bounds of an interior zero-length array ‘RTE_MARKER64’ {aka ‘long unsigned int[0]’} [-Wzero-length-bounds] 21 | *(uint64_t *)&mb->rearm_data = enic->mbuf_initializer; | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from ../lib/librte_mbuf/rte_mbuf.h:45, from ../drivers/net/enic/enic_rxtx_vec_avx2.c:6: ../lib/librte_mbuf/rte_mbuf_core.h:484:15: note: while referencing ‘rearm_data’ 484 | RTE_MARKER64 rearm_data; | Disable this warning for gcc 10 in order to allow v20.05 to build without changes to struct rte_mbuf. Bugzilla ID: 396 Cc: stable@dpdk.org Signed-off-by: Kevin Traynor Reviewed-by: David Marchand --- diff --git a/config/meson.build b/config/meson.build index a1c38c053e..43ab113106 100644 --- a/config/meson.build +++ b/config/meson.build @@ -208,6 +208,10 @@ warning_flags = [ '-Wno-packed-not-aligned', '-Wno-missing-field-initializers' ] +if cc.get_id() == 'gcc' and cc.version().version_compare('>=10.0') +# FIXME: Bugzilla 396 + warning_flags += '-Wno-zero-length-bounds' +endif if not dpdk_conf.get('RTE_ARCH_64') # for 32-bit, don't warn about casting a 32-bit pointer to 64-bit int - it's fine!! warning_flags += '-Wno-pointer-to-int-cast' diff --git a/mk/toolchain/gcc/rte.vars.mk b/mk/toolchain/gcc/rte.vars.mk index f19305e495..928f0e0830 100644 --- a/mk/toolchain/gcc/rte.vars.mk +++ b/mk/toolchain/gcc/rte.vars.mk @@ -81,6 +81,11 @@ ifeq ($(shell test $(GCC_VERSION) -lt 47 && echo 1), 1) WERROR_FLAGS += -Wno-uninitialized endif +ifeq ($(shell test $(GCC_VERSION) -ge 100 && echo 1), 1) +# FIXME: Bugzilla 396 +WERROR_FLAGS += -Wno-zero-length-bounds +endif + HOST_WERROR_FLAGS := $(WERROR_FLAGS) ifeq ($(shell test $(HOST_GCC_VERSION) -gt 70 && echo 1), 1)