From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <blomqvist.janne@gmail.com>
Received: from mail-oa1-x30.google.com (mail-oa1-x30.google.com
 [IPv6:2001:4860:4864:20::30])
 by sourceware.org (Postfix) with ESMTPS id D428D395563E
 for <fortran@gcc.gnu.org>; Thu,  2 Jun 2022 19:06:59 +0000 (GMT)
DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org D428D395563E
Received: by mail-oa1-x30.google.com with SMTP id
 586e51a60fabf-edeb6c3642so7936700fac.3
 for <fortran@gcc.gnu.org>; Thu, 02 Jun 2022 12:06:59 -0700 (PDT)
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
 d=1e100.net; s=20210112;
 h=x-gm-message-state:mime-version:references:in-reply-to:from:date
 :message-id:subject:to:cc;
 bh=q+hEmi/1SGNchlyYFZzyNjpK6DXEEHyZHTmeGjD5ZvA=;
 b=n0kiMrxwPRfpwpLzyHtlfdX4X8Iq0AHwokqDlVhHaAaTrmKXbJ76fn0GpqDvD+AdcI
 +CZapRBV00gloKwd3html8ii1vhyp1XcLwa/UlZfKX0Ji8qrfBpdl85I6iaSux4wp+Ol
 jVaC2eCezWyT8j9af6x0N+7Oucc9cKB16+Xpc/EfmilonEXRfgA/hEyl0Vpn1vYVpdNF
 nbGB5vk49QMHN03+OLki8drvuJr6lK7JkeOT1xrlyc5wegdHKXVudkDSvTpWMRGCAbiy
 EvmioXGZBKEnNbJowd7ycrDtm3FZhIqHNAD93N0LD6EXuUDH8NgEieXn2jw5T1+bQhM5
 QheQ==
X-Gm-Message-State: AOAM533D0GYnme7vsI4MX9zf5lXtDNzniyJUqt8WuxEuEtF5AFYPkDhO
 +0HshiOBDgROGCV8qBd2NCGXaaYQxRX3zzk9Jfc=
X-Google-Smtp-Source: ABdhPJxCqb2VCPUXUD24L8QZfN8Gps9pPAZOyslwyKARQM80gojzYz+NsjVmVgmXbLEwQnq/CWIqoYzFG/yjwwR4UPg=
X-Received: by 2002:a05:6870:430d:b0:f2:d28b:3444 with SMTP id
 w13-20020a056870430d00b000f2d28b3444mr21022760oah.211.1654196819127; Thu, 02
 Jun 2022 12:06:59 -0700 (PDT)
MIME-Version: 1.0
References: <t778ph$8oo$1@ciao.gmane.io>
 <CAMCbSMoMdd=_b-JV9EbJmy+wgGtmY-g6s_eJ5ZbaK8DGvp7KqQ@mail.gmail.com>
 <f1ac1320-c1d9-d0bf-4a85-55f2fec4253f@uni-konstanz.de>
 <20220601115026.452a6840@vepi2>
 <CAMCbSMobAfAiqpMZtO_FQhn7uHGdRPchL_dDqh-uASaHwB9UHw@mail.gmail.com>
 <CAMCbSMq1E2zWPrrcg7HUN_QL_AJ=0surwxsNL5G35jJbBQM8Hg@mail.gmail.com>
 <d2053669-8d2d-117b-b766-e003f404a12f@uni-konstanz.de>
In-Reply-To: <d2053669-8d2d-117b-b766-e003f404a12f@uni-konstanz.de>
From: Janne Blomqvist <blomqvist.janne@gmail.com>
Date: Thu, 2 Jun 2022 22:06:48 +0300
Message-ID: <CAO9iq9HkNV8ZkAyLVwK-fq4O0MptP33WBweuZD=TEXu_+97oQQ@mail.gmail.com>
Subject: Re: is there a way to find out gfortran version and/or options from a
 given binary?
To: Kay Diederichs <kay.diederichs@uni-konstanz.de>
Cc: Arjen Markus <arjen.markus895@gmail.com>, Andre Vehreschild <vehre@gmx.de>,
 Fortran List <fortran@gcc.gnu.org>
Content-Type: text/plain; charset="UTF-8"
X-Spam-Status: No, score=1.1 required=5.0 tests=BAYES_00, DKIM_SIGNED,
 DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM, RCVD_IN_DNSWL_NONE,
 SPF_HELO_NONE, SPF_PASS, TXREP,
 T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6
X-Spam-Level: *
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on
 server2.sourceware.org
X-BeenThere: fortran@gcc.gnu.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Fortran mailing list <fortran.gcc.gnu.org>
List-Unsubscribe: <https://gcc.gnu.org/mailman/options/fortran>,
 <mailto:fortran-request@gcc.gnu.org?subject=unsubscribe>
List-Archive: <https://gcc.gnu.org/pipermail/fortran/>
List-Help: <mailto:fortran-request@gcc.gnu.org?subject=help>
List-Subscribe: <https://gcc.gnu.org/mailman/listinfo/fortran>,
 <mailto:fortran-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Thu, 02 Jun 2022 19:07:01 -0000

On Wed, Jun 1, 2022 at 1:16 PM Kay Diederichs
<kay.diederichs@uni-konstanz.de> wrote:
> If -g is used, the executable _always_ has version and option info

Well, isn't that the answer to your question then?

As an alternative approach, make a command-line option (say, "-v")
that prints the version number of the program, name of the author and
other pertinent information, as well as the output of
compiler_version() and compiler_options(), and then exits. That would
ensure that those calls won't be optimized away.

-- 
Janne Blomqvist