From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wi0-f179.google.com (mail-wi0-f179.google.com [209.85.212.179]) by dpdk.org (Postfix) with ESMTP id EEB99C35C for ; Wed, 15 Apr 2015 22:50:13 +0200 (CEST) Received: by wizk4 with SMTP id k4so170102343wiz.1 for ; Wed, 15 Apr 2015 13:50:13 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-type:content-transfer-encoding; bh=0QLXWViNiXes1x8Afw1pF7QmKJJtUUKFuBz4a6/hhqw=; b=drkV2RBagmzL40vXfsrGbLn8xJTxW0medLdDe04eGkhlWHS4sW2fQCK1+FXD0yCr4k 04zyJDxxvF1rh8pAIMvSJRNLwKrlTOjFXNFnNM4nlKHDVTft5vWafb+oR+TSe9T0NOKP x9dPw3d4AWON307aunXwaZQXgVTjDQVV3AX+tm3UoREkjioGJsP8QigFUyUDIxG9gLzO /VrrQZY2RRmedgRhKS51IvAFY0c55+WXVEsl3V08YarY53/m6JbMZskiIw7KcJNiGaC6 Zp0mROO5Ty90SsLozSz+ZRWRdIMDlr/zdgf6LSUA9x05qMPuGs5r3ncRNDkenQmSfWxi cZ1w== X-Gm-Message-State: ALoCoQkLqPgicF1+HqsLJyxMw4mMD+kEA7LX9+CdXLAVfu0VCDVlEpDYQ8q4gt/C0C4h437GhHuj X-Received: by 10.194.200.42 with SMTP id jp10mr52267782wjc.66.1429131013828; Wed, 15 Apr 2015 13:50:13 -0700 (PDT) Received: from localhost.localdomain (136-92-190-109.dsl.ovh.fr. [109.190.92.136]) by mx.google.com with ESMTPSA id pv2sm7480174wjc.33.2015.04.15.13.50.12 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 15 Apr 2015 13:50:12 -0700 (PDT) From: Thomas Monjalon To: dev@dpdk.org Date: Wed, 15 Apr 2015 22:49:15 +0200 Message-Id: <1429130956-17828-1-git-send-email-thomas.monjalon@6wind.com> X-Mailer: git-send-email 2.2.2 In-Reply-To: <1958525.YbKd0lDtje@xps13> References: <1958525.YbKd0lDtje@xps13> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: [dpdk-dev] [PATCH v2 1/2] ixgbe: fix build with gcc 4.4 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 15 Apr 2015 20:50:14 -0000 With GCC 4.4.7 from CentOS 6.5, the following errors arise: lib/librte_pmd_ixgbe/ixgbe_rxtx.c: In function ‘ixgbe_dev_rx_queue_setup’: lib/librte_pmd_ixgbe/ixgbe_rxtx.c:2509: error: missing initializer lib/librte_pmd_ixgbe/ixgbe_rxtx.c:2509: error: (near initialization for ‘dev_info.driver_name’) lib/librte_pmd_ixgbe/ixgbe_rxtx.c: In function ‘ixgbe_set_rsc’: lib/librte_pmd_ixgbe/ixgbe_rxtx.c:4072: error: missing initializer lib/librte_pmd_ixgbe/ixgbe_rxtx.c:4072: error: (near initialization for ‘dev_info.driver_name’) lib/librte_pmd_ixgbe/ixgbe_rxtx.c: In function ‘ixgbe_recv_pkts_lro_single_alloc’: lib/librte_pmd_ixgbe/ixgbe_rxtx.c:1479: error: ‘next_rsc_entry’ may be used uninitialized in this function lib/librte_pmd_ixgbe/ixgbe_rxtx.c:1480: error: ‘next_rxe’ may be used uninitialized in this function The "missing initializer" warning is a GCC bug which seems fixed in 4.7. The "may be used uninitialized" warning seems to be another GCC bug and is workarounded with NULL initialization. Fixes: 8eecb3295aed ("ixgbe: add LRO support") Signed-off-by: Thomas Monjalon --- changes in v2: - option -Wno-missing-field-initializers for old GCC instead of code workaround lib/librte_pmd_ixgbe/ixgbe_rxtx.c | 4 ++-- mk/toolchain/gcc/rte.vars.mk | 5 +++++ 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/lib/librte_pmd_ixgbe/ixgbe_rxtx.c b/lib/librte_pmd_ixgbe/ixgbe_rxtx.c index f1da9ec..6475c44 100644 --- a/lib/librte_pmd_ixgbe/ixgbe_rxtx.c +++ b/lib/librte_pmd_ixgbe/ixgbe_rxtx.c @@ -1476,8 +1476,8 @@ ixgbe_recv_pkts_lro(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts, bool eop; struct ixgbe_rx_entry *rxe; struct ixgbe_rsc_entry *rsc_entry; - struct ixgbe_rsc_entry *next_rsc_entry; - struct ixgbe_rx_entry *next_rxe; + struct ixgbe_rsc_entry *next_rsc_entry = NULL; + struct ixgbe_rx_entry *next_rxe = NULL; struct rte_mbuf *first_seg; struct rte_mbuf *rxm; struct rte_mbuf *nmb; diff --git a/mk/toolchain/gcc/rte.vars.mk b/mk/toolchain/gcc/rte.vars.mk index 88f235c..208cddd 100644 --- a/mk/toolchain/gcc/rte.vars.mk +++ b/mk/toolchain/gcc/rte.vars.mk @@ -80,5 +80,10 @@ WERROR_FLAGS += -Wundef -Wwrite-strings # process cpu flags include $(RTE_SDK)/mk/toolchain/$(RTE_TOOLCHAIN)/rte.toolchain-compat.mk +# workaround GCC bug with warning "missing initializer" for "= {0}" +ifeq ($(shell test $(GCC_VERSION) -lt 47 && echo 1), 1) +WERROR_FLAGS += -Wno-missing-field-initializers +endif + export CC AS AR LD OBJCOPY OBJDUMP STRIP READELF export TOOLCHAIN_CFLAGS TOOLCHAIN_LDFLAGS TOOLCHAIN_ASFLAGS -- 2.2.2