From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from layka.disroot.org (layka.disroot.org [178.21.23.139]) by sourceware.org (Postfix) with ESMTPS id 03A113858D39 for ; Thu, 18 Apr 2024 04:12:10 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 03A113858D39 Authentication-Results: sourceware.org; dmarc=pass (p=reject dis=none) header.from=disroot.org Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=disroot.org ARC-Filter: OpenARC Filter v1.0.0 sourceware.org 03A113858D39 Authentication-Results: server2.sourceware.org; arc=none smtp.remote-ip=178.21.23.139 ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1713413533; cv=none; b=Gw6UfXWVckVnAIaKMbqqYcotDTZi/ZGh028bnirgcXktM0Bc6e6O7d0ip50nki5a2UdE9e4cvhf75SZL3iPo14j4BfHvuKhIGybHWC0rfODFiSUv8bZ8eTnXWYbfLe5LHWAKnJoC/SEnCYblcqxztQReCKxZrnjME3iBmJ4rgEQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1713413533; c=relaxed/simple; bh=GAiVDSclB/xnDvhatgj2jd9oPX1WFxoov/gyTpXH5QQ=; h=From:DKIM-Signature:To:Subject:Date:Message-Id:MIME-Version; b=MCPIWP0B87sCH3zbA4YtbFfgA9kSnDywRiPfpRFEkkzTBdTm/i34Ze4jtjl2AirPJfVprH5MdgIwjpSp1SSlClYV2UX2hJx7QMfZA5Q8z1zPdurP/Pwajo9SyrSOQY5hyX6btWi4Hd88nUWgAlM62CALTPOzyKcWQ+Am7CCoI5s= ARC-Authentication-Results: i=1; server2.sourceware.org X-Virus-Scanned: SPAM Filter at disroot.org From: Peter Damianov DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=disroot.org; s=mail; t=1713413528; bh=GAiVDSclB/xnDvhatgj2jd9oPX1WFxoov/gyTpXH5QQ=; h=From:To:Cc:Subject:Date; b=Bm3+t/w3m6wLAindXSfihDnokgnC6yBYAH1FON44KVfx43jRdhKsp4fAXMSQ0pZ4t 5ZGCrORCGjnVGv3aEMPvDIC0s4WqwkbrfJT0MFYgHWHzGJtRSY3CGg0EzxEE8i/WHr X6B6b4DKO73ztXURxHFp13ULL7mlDWToQH+7e5svmHPK6nmyo33LKIaogjQhLqJcXH /9IdkLi9FUr3guEIpNrAQ1E8pKcT1ZAyk0YobqsFmo+FnuLAEsMfP4yEkM+KvmC64B JSK/P/B9Sa+ln7/ZuKiMkUeWfWmDjBHentsdQg7U8KFylzALBTEykGkoxMhGPp1Yq4 ij/dEQ4QiGmWA== To: gcc-patches@gcc.gnu.org Cc: richard.guenther@gmail.com, Peter Damianov Subject: [PATCH v2 1/2] Driver: Add new -truncate option Date: Wed, 17 Apr 2024 21:09:12 -0700 Message-Id: <20240418040912.6236-1-peter0x44@disroot.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-11.1 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,GIT_PATCH_0,SPF_HELO_NONE,SPF_PASS,TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: This commit adds a new option to the driver that truncates one file after linking. Tested likeso: $ gcc hello.c -c $ du -h hello.o 4.0K hello.o $ gcc hello.o -truncate hello $ ./a.out Hello world $ du -h hello.o $ 0 hello.o $ gcc hello.o -truncate gcc: error: missing filename after '-truncate' The motivation for adding this is PR110710. It is used by lto-wrapper to truncate files in a shell-independent manner. Signed-off-by: Peter Damianov --- v2: moved truncation to driver::final_actions v2: moved handling of OPT_truncate to be in alphabetic order gcc/common.opt | 6 ++++++ gcc/gcc.cc | 13 +++++++++++++ 2 files changed, 19 insertions(+) diff --git a/gcc/common.opt b/gcc/common.opt index ad348844775..40cab3cb36a 100644 --- a/gcc/common.opt +++ b/gcc/common.opt @@ -422,6 +422,12 @@ Display target specific command line options (including assembler and linker opt -time Driver Alias(time) +;; Truncate the file specified after linking. +;; This option is used by lto-wrapper to reduce the peak disk-usage when +;; linking with many .LTRANS units. +truncate +Driver Separate Undocumented MissingArgError(missing filename after %qs) + -verbose Driver Alias(v) diff --git a/gcc/gcc.cc b/gcc/gcc.cc index 728332b8153..b4169bbd3be 100644 --- a/gcc/gcc.cc +++ b/gcc/gcc.cc @@ -2138,6 +2138,10 @@ static int have_E = 0; /* Pointer to output file name passed in with -o. */ static const char *output_file = 0; +/* Pointer to input file name passed in with -truncate. + This file should be truncated after linking. */ +static const char *totruncate_file = 0; + /* This is the list of suffixes and codes (%g/%u/%U/%j) and the associated temp file. If the HOST_BIT_BUCKET is used for %j, no entry is made for it here. */ @@ -4538,6 +4542,10 @@ driver_handle_option (struct gcc_options *opts, do_save = false; break; + case OPT_truncate: + totruncate_file = arg; + break; + case OPT____: /* "-###" This is similar to -v except that there is no execution @@ -9286,6 +9294,11 @@ driver::final_actions () const delete_failure_queue (); delete_temp_files (); + if (totruncate_file != NULL && !seen_error ()) + /* Truncate file specified by -truncate. + Used by lto-wrapper to reduce temporary disk-space usage. */ + truncate(totruncate_file, 0); + if (print_help_list) { printf (("\nFor bug reporting instructions, please see:\n")); -- 2.39.2