From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by sourceware.org (Postfix) with ESMTPS id 5D86C3858CDB for ; Mon, 28 Nov 2022 11:28:56 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 5D86C3858CDB Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=redhat.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1669634935; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=pT1dQinLCU7gf6SqKPJ4Lhj9x/UapgIsxAFbCcLsC7c=; b=idrVhlBT4tqtuNOBYt5iaVSQtQ7SfQ9EBkeEuV4wb34/WW/cKThD45Kv0KQQzAihsrRS5G Y6cAvFnr0EZtBrDc9ECr9C5On6x3BPjId+dWdkgWi84iHPvuATxInpZ0GyXiv0fYiyMyNM eHwEgukXEz0BaMZIdit99tDGZBAtU6Y= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-183-5wHrlXz4OCKKl38XfP4WNg-1; Mon, 28 Nov 2022 06:28:54 -0500 X-MC-Unique: 5wHrlXz4OCKKl38XfP4WNg-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 6AEFA811E81 for ; Mon, 28 Nov 2022 11:28:54 +0000 (UTC) Received: from oldenburg.str.redhat.com (unknown [10.2.16.79]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 13FA52027061 for ; Mon, 28 Nov 2022 11:28:53 +0000 (UTC) From: Florian Weimer To: gcc@gcc.gnu.org Subject: Triggering -save-temps from the front-end code Date: Mon, 28 Nov 2022 12:28:50 +0100 Message-ID: <87y1rvs4gd.fsf@oldenburg.str.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.4 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Status: No, score=-4.5 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_NONE,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: I've got some instrumentation for logging errors to a magic directory, so that I can see if a build triggered them even when it did not fail=E2=80=94and hid all compiler errors and warnings. Unfortunately, some build systems immediately delete the input source files. Is there some easy way I can dump the pre-processed and non-preprocessed sources to my log file? I tried to understand how -save-temps for crash recovery works, but it seems that this runs outside of the frontend, in the driver. Here's an example of the challenges this would help to solve: Building in strict C99 mode Thanks, Florian