From 95cd37070af44aedcb2b9a593e5121fbb6f2bfee Mon Sep 17 00:00:00 2001 From: Ferruh Yigit Date: Mon, 17 Apr 2017 15:35:58 +0100 Subject: [PATCH] mk: fix build for clang 4 clang 4 gives "taking address of packed member may result in an unaligned pointer value" warnings in a few locations [1]. Disabled "-Waddress-of-packed-member" warning for clang >= 4 [1] build errors: .../lib/librte_eal/common/eal_common_memzone.c:275:25: error: taking address of packed member 'mlock' of class or structure 'rte_mem_config' may result in an unaligned pointer value [-Werror,-Waddress-of-packed-member] rte_rwlock_write_lock(&mcfg->mlock); ^~~~~~~~~~~ .../lib/librte_ip_frag/rte_ipv4_reassembly.c:139:31: error: taking address of packed member 'src_addr' of class or structure 'ipv4_hdr' may result in an unaligned pointer value [-Werror,-Waddress-of-packed-member] psd = (unaligned_uint64_t *)&ip_hdr->src_addr; ^~~~~~~~~~~~~~~~ .../lib/librte_vhost/vhost_user.c:1037:34: error: taking address of packed member 'payload' of class or structure 'VhostUserMsg' may result in an unaligned pointer value [-Werror,-Waddress-of-packed-member] vhost_user_set_vring_num(dev, &msg.payload.state); ^~~~~~~~~~~~~~~~~ Signed-off-by: Ferruh Yigit --- mk/toolchain/clang/rte.vars.mk | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/mk/toolchain/clang/rte.vars.mk b/mk/toolchain/clang/rte.vars.mk index 7749b991b5..af34c10aa0 100644 --- a/mk/toolchain/clang/rte.vars.mk +++ b/mk/toolchain/clang/rte.vars.mk @@ -79,5 +79,10 @@ include $(RTE_SDK)/mk/toolchain/$(RTE_TOOLCHAIN)/rte.toolchain-compat.mk # workaround clang bug with warning "missing field initializer" for "= {0}" WERROR_FLAGS += -Wno-missing-field-initializers +# disable packed member unalign warnings +ifeq ($(shell test $(CLANG_MAJOR_VERSION) -ge 4 && echo 1), 1) +WERROR_FLAGS += -Wno-address-of-packed-member +endif + export CC AS AR LD OBJCOPY OBJDUMP STRIP READELF export TOOLCHAIN_CFLAGS TOOLCHAIN_LDFLAGS TOOLCHAIN_ASFLAGS -- 2.20.1