From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.0 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D1A18C432BE for ; Sat, 14 Aug 2021 23:41:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B3CC860E9B for ; Sat, 14 Aug 2021 23:41:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233549AbhHNXmY (ORCPT ); Sat, 14 Aug 2021 19:42:24 -0400 Received: from conuserg-11.nifty.com ([210.131.2.78]:22619 "EHLO conuserg-11.nifty.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233223AbhHNXmX (ORCPT ); Sat, 14 Aug 2021 19:42:23 -0400 Received: from localhost.localdomain (133-32-232-101.west.xps.vectant.ne.jp [133.32.232.101]) (authenticated) by conuserg-11.nifty.com with ESMTP id 17ENf7AF008297; Sun, 15 Aug 2021 08:41:07 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-11.nifty.com 17ENf7AF008297 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1628984467; bh=p77MqZ/bQE0NRNaOYH8SC4jbtPVunqpmSihwUeNOgTs=; h=From:To:Cc:Subject:Date:From; b=wiY5maaWjgFa28oHNA7cBRQlu1O2z0zZRlAxExMsblSL85YCq9PvZ2zV86EizK49l MUZxlJN6VprMeuL0EuRV1J51zmRfZI9fnbYACpRNdLYN+F0KULssR5E5+mjoKHLYpq anC40b6z0A4M3h86BPvyCTg6lG01zANxBUlcG7MltsJOh1dwa9SnU6QQWdEe51eVbn BWwyLfNh7/h7rDo3goLlY4Z/yM0elZxQHvQUVP3Q1QzdNXEufqv8O/+KQSWV+QvEMQ oe8Bp5ixZZv1mXkk3faKfHlxMqrgdB5m2n38rstARogBPpsYpK8fkAi0sIzT3AsPo7 xGToFOaODK0iw== X-Nifty-SrcIP: [133.32.232.101] From: Masahiro Yamada To: linux-kbuild@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Masahiro Yamada , Nathan Chancellor , Nick Desaulniers , Nicolas Pitre , clang-built-linux@googlegroups.com Subject: [PATCH] kbuild: Fix 'no symbols' warning when CONFIG_TRIM_UNUSD_KSYMS=y Date: Sun, 15 Aug 2021 08:41:02 +0900 Message-Id: <20210814234102.2315551-1-masahiroy@kernel.org> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org When CONFIG_TRIM_UNUSED_KSYMS is enabled, I see some warnings like this: nm: arch/x86/entry/vdso/vdso32/note.o: no symbols $NM (both GNU nm and llvm-nm) warns when no symbol is found in the object. Suppress the stderr. Fixes: bbda5ec671d3 ("kbuild: simplify dependency generation for CONFIG_TRIM_UNUSED_KSYMS") Signed-off-by: Masahiro Yamada --- scripts/gen_ksymdeps.sh | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/scripts/gen_ksymdeps.sh b/scripts/gen_ksymdeps.sh index 1324986e1362..5493124e8ee6 100755 --- a/scripts/gen_ksymdeps.sh +++ b/scripts/gen_ksymdeps.sh @@ -4,7 +4,10 @@ set -e # List of exported symbols -ksyms=$($NM $1 | sed -n 's/.*__ksym_marker_\(.*\)/\1/p' | tr A-Z a-z) +# +# If the object has no symbol, $NM warns 'no symbols'. +# Suppress the stdout. +ksyms=$($NM $1 2>/dev/null | sed -n 's/.*__ksym_marker_\(.*\)/\1/p' | tr A-Z a-z) if [ -z "$ksyms" ]; then exit 0 -- 2.30.2