From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f49.google.com (mail-wm0-f49.google.com [74.125.82.49]) by dpdk.org (Postfix) with ESMTP id 08F7D8E9E for ; Fri, 4 Dec 2015 18:11:30 +0100 (CET) Received: by wmww144 with SMTP id w144so70209594wmw.1 for ; Fri, 04 Dec 2015 09:11:29 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=6wind-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=y9qW7shDY96xWbUu5/IH9TgElM8Vcjh2ltpFKe8PzAs=; b=M7mvy4Snwb8rAlCdWVtU3C0dppk8is0RVbcVK0DQ8EvcVVWbtJAmjDS5sIQRt8Z4v/ Hxq8cCWGySAJxaiXuNJG/8MopUA850+9/xisZrFxR1rQH8exROsroi8ACYWb63MgguLp w+5WM+/7BY5Sj2JEm9luYY9+tcL99vJp1CuM38LYovp09oKmgneqbZqybav2BNk91m+4 g4duIQBRwLw4Mb5G2o+yaHalS1907GY1NIEcs4q69Nc5qQUqW3CLK0UJ3+gxF5oEhO6v OEXraCPdqYAdpI+vt0adFMjE0nwVOjsXmboNOitFuqM16mY7aHLtT4SWRMVFcCDHAGFv 7CwQ== 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; bh=y9qW7shDY96xWbUu5/IH9TgElM8Vcjh2ltpFKe8PzAs=; b=K6DJL0noURwcUvu2d/f1RX/DlwOMaSTQptNyEuusi89/e1yT+hIlq+27vzni76E6G2 UxA/1BnCoLZeQ+XSuQPFvxw4aG8I0ovaGk0U5xDWc0gFoNHoCp7Q1/kRitMVlLifss70 rz1njLWZSt5wjwLLUE8LsvNHp9Z7izmpN6LbrGWvccUiUL1lBwc8CjXOw/8UrsexpRAN wdQRsNCuIU7O1u4S8KCaUEVxoKSjHDnfpAD/7cCpZhWnupSNu4hd8/IKXE1urXldtP4f vdaoZhmoprZJbJGeh+XQCRnjr5t9PX6DJX/2/uSsUTJdMl2iS+xJj9hpyI69Ey2mMiEn nnpQ== X-Gm-Message-State: ALoCoQn+XTDWLT9xt7zMZvu7HJ8ErWSY2YtsqljHxuCf4jf3i6wipO5YSyi3bFIh4zEAMDW8VSM3 X-Received: by 10.194.133.233 with SMTP id pf9mr18717706wjb.71.1449249089844; Fri, 04 Dec 2015 09:11:29 -0800 (PST) Received: from alcyon.dev.6wind.com (guy78-3-82-239-227-177.fbx.proxad.net. [82.239.227.177]) by smtp.gmail.com with ESMTPSA id e83sm4300830wmc.23.2015.12.04.09.11.28 (version=TLSv1/SSLv3 cipher=OTHER); Fri, 04 Dec 2015 09:11:29 -0800 (PST) From: David Marchand To: dev@dpdk.org Date: Fri, 4 Dec 2015 18:11:03 +0100 Message-Id: <1449249063-9792-1-git-send-email-david.marchand@6wind.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1449239893-4012-1-git-send-email-david.marchand@6wind.com> References: <1449239893-4012-1-git-send-email-david.marchand@6wind.com> Subject: [dpdk-dev] [PATCH v2] mk: fix objects/library order when linking 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: Fri, 04 Dec 2015 17:11:30 -0000 The initial problem has been seen while building mlx4 pmd as a shared library on Ubuntu 14.04 (gcc 4.8.4-2ubuntu1~14.04). Resulting .so will lack the DT_NEEDED entry for libibverbs: marchand@ubuntu1404:~/dpdk$ ldd ./build/lib/librte_pmd_mlx4.so linux-vdso.so.1 => (0x00007fff87ebb000) libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f2ced21a000) /lib64/ld-linux-x86-64.so.2 (0x00007f2ced821000) And trying to load it in testpmd triggers this error: [...] EAL: librte_pmd_mlx4.so: undefined symbol: ibv_query_port [...] After some strace, the problem comes from the --as-needed option passed to the linker. It is safer to specify libraries we depend on after the objects we are linking into a shared library, especially when the linker is invoked with options like --as-needed. Fixes: bef06a8a0655 ("mk: set library dependencies in shared object file") Signed-off-by: David Marchand --- Changes since v1: - added some details in commitlog since Thomas does not like "safer" argument :-) --- mk/rte.lib.mk | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mk/rte.lib.mk b/mk/rte.lib.mk index 06a1519..1f1b6e1 100644 --- a/mk/rte.lib.mk +++ b/mk/rte.lib.mk @@ -82,7 +82,7 @@ O_TO_A_DO = @set -e; \ $(O_TO_A) && \ echo $(O_TO_A_CMD) > $(call exe2cmd,$(@)) -O_TO_S = $(LD) $(_CPU_LDFLAGS) $(EXTRA_LDFLAGS) $(LDLIBS) -shared $(OBJS-y) \ +O_TO_S = $(LD) $(_CPU_LDFLAGS) $(EXTRA_LDFLAGS) -shared $(OBJS-y) $(LDLIBS) \ -Wl,-soname,$(LIB) -o $(LIB) O_TO_S_STR = $(subst ','\'',$(O_TO_S)) #'# fix syntax highlight O_TO_S_DISP = $(if $(V),"$(O_TO_S_STR)"," LD $(@)") -- 1.7.10.4