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 D66603858C62 for ; Thu, 18 Apr 2024 00:57:08 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org D66603858C62 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 D66603858C62 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=1713401832; cv=none; b=vwfgD45E/UFIzl+T8I26+Bfq5vaFNACmi56mDc67Ibbqp23zb/Pj3/dJI+/X7Txt7coE4/74msGKHBhpfzIrbB8t20AY3gMPveLRtakGsex5sRYyVVDFR3m7ygE8DiSn6KkSpaojPySfjYrYX72UJ0lBukS1vSQJ4YyN1vZtvIM= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1713401832; c=relaxed/simple; bh=Oz0/+TfZqzlBz1wdWAdI7XJEdq3ir1M2VI1SomKPFWQ=; h=From:DKIM-Signature:To:Subject:Date:Message-Id:MIME-Version; b=XZJ7NhYiu1eYBb5RUNTleW/h8DTjvQth6GAECh4tGNKxznHF8AzONlPlsW+XHLcVvFLp/zZC64VI+DPfMt7cqOHrfHzxVF8W4oTkOOvSVY3ii12I3YKA1S/zlNQntNcpVdt13KpOwK2wMNxswCti4SFVQMwQjAJfoMIwaoMfkAI= 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=1713401826; bh=Oz0/+TfZqzlBz1wdWAdI7XJEdq3ir1M2VI1SomKPFWQ=; h=From:To:Cc:Subject:Date; b=fS1a0cLdAhSAtk5eKdfuQ9u1eFiJtXVWEO1SDfcghxwjSdf3rsT+Y5tCrwvaPOvTw cLDI28UY7bLNflr8P4chGaePIo0LC05kWisf4l4UOpCdLHxPvAlk+8iQk5VSdJTU50 KZ83qI3+l2nJqLL3DthdGaQTiCvcZGMigiFd8KF/+yrjZnGa+q5rZXOKysXL19NGnM qzVgM3avQwf0Zv++aCenM9jg9mUeCvfMw1+6fbJu5l7lNoJCGVspnRiYnoTFP/xYjN cNTaTbmhzTaI+7qa/gMLPeKWkrT+rY5mLS288rIMj3cPaE4cBtrNFAFmFMZeGcsDZc AyJ8uv+0687eg== To: gcc-patches@gcc.gnu.org Cc: richard.guenther@gmail.com, Peter Damianov Subject: [PATCH 1/2] Driver: Add new -truncate option Date: Wed, 17 Apr 2024 17:56:02 -0700 Message-Id: <20240418005602.24118-1-peter0x44@disroot.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-10.7 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 --- gcc/common.opt | 5 +++++ gcc/gcc.cc | 13 +++++++++++++ 2 files changed, 18 insertions(+) diff --git a/gcc/common.opt b/gcc/common.opt index ad348844775..3ede2fa8552 100644 --- a/gcc/common.opt +++ b/gcc/common.opt @@ -422,6 +422,11 @@ 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 when linking with +;; many .LTRANS units. +Driver Separate Undocumented MissingArgError(missing filename after %qs) + -verbose Driver Alias(v) diff --git a/gcc/gcc.cc b/gcc/gcc.cc index 728332b8153..00017964295 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. */ @@ -4607,6 +4611,10 @@ driver_handle_option (struct gcc_options *opts, save_switch ("-o", 1, &arg, validated, true); return true; + case OPT_truncate: + totruncate_file = arg; + break; + case OPT_pie: #ifdef ENABLE_DEFAULT_PIE /* -pie is turned on by default. */ @@ -9273,6 +9281,11 @@ driver::maybe_run_linker (const char *argv0) const option). */ error ("%s: linker input file not found: %m", outfiles[i]); } + + if (totruncate_file != NULL && linker_was_run && !seen_error ()) + /* Truncate file specified by -truncate. + Used by lto-wrapper to reduce temporary disk-space usage. */ + truncate(totruncate_file, 0); } /* The end of "main". */ -- 2.39.2