From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <SRS0=pECQ=6K=xry111.site=xry111@sourceware.org>
Received: from xry111.site (xry111.site [89.208.246.23])
	by sourceware.org (Postfix) with ESMTPS id E4C9C3858D1E
	for <gcc-help@gcc.gnu.org>; Tue, 14 Feb 2023 13:02:27 +0000 (GMT)
DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org E4C9C3858D1E
Authentication-Results: sourceware.org; dmarc=pass (p=reject dis=none) header.from=xry111.site
Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=xry111.site
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=xry111.site;
	s=default; t=1676379742;
	bh=Vtmm3C+Rekdpzhk+xo/T1Vi5UXAEHtwBMh3cVP5m7EY=;
	h=Subject:From:To:Cc:Date:In-Reply-To:References:From;
	b=PnYunTN94hF5wGh0wyf+LtyjAPJ4GK9chHgrOfkX/WptRxAmmjQ82yiRlGU7Tc6om
	 ZVHnHR6UMsZLmhnZFHBN1tC/f1TKiopp8kqHi1bP03MuUVkZYB8/dVWUik7K284/Vj
	 vgWsbR5ODXJ4ABOZ1NthXGgrAsbl2E1i38FESvvA=
Received: from [IPv6:240e:456:1030:5cf6:bedf:6bc:7e29:f3e5] (unknown [IPv6:240e:456:1030:5cf6:bedf:6bc:7e29:f3e5])
	(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
	 key-exchange ECDHE (P-256) server-signature ECDSA (P-384))
	(Client did not present a certificate)
	(Authenticated sender: xry111@xry111.site)
	by xry111.site (Postfix) with ESMTPSA id 8F4F865AE6;
	Tue, 14 Feb 2023 08:02:20 -0500 (EST)
Message-ID: <2c918a575894e49277e30d427c6df2380a9a098e.camel@xry111.site>
Subject: Re: Cross Compiling for riscv64
From: Xi Ruoyao <xry111@xry111.site>
To: Sagar Acharya <sagaracharya@tutanota.com>
Cc: gcc-help@gcc.gnu.org
Date: Tue, 14 Feb 2023 21:02:14 +0800
In-Reply-To: <NOF-04_--3-9@tutanota.com>
References: <NOEhh6P--3-9@tutanota.com>
	 <8db704d6dae26764592f794835e07fc4100ed506.camel@xry111.site>
	 <NOEtZxw--3-9@tutanota.com>
	 <4db1fdb33d0f4006e0b083b4429949337a740c01.camel@xry111.site>
	 <NOF-04_--3-9@tutanota.com>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
User-Agent: Evolution 3.46.4 
MIME-Version: 1.0
X-Spam-Status: No, score=-1.0 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,KAM_NUMSUBJECT,LIKELY_SPAM_FROM,SPF_HELO_PASS,SPF_PASS,TXREP autolearn=no autolearn_force=no version=3.4.6
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org
List-Id: <gcc-help.gcc.gnu.org>

On Tue, 2023-02-14 at 13:57 +0100, Sagar Acharya wrote:
> Point of a compiler is to convert C code to machine code of
> hex/binary/object file in least amount of time and conserving as much
> memory as can be done.

A compiler needs to take a balance between compiling speed & memory
consumption and the speed & memory consumption of the generated code.=20
GCC prefers to make better generated code, as long as no quadratic
behavior exists during compile time.

> The values of memory required are definitely not of order 1GB. There
> are OSes which can be booted in less than 100MB.

You can find another compiler if you really need one for a small device.
Or you can submit some patches to improve the speed & memory footprint
of GCC (or hire somebody to do) as long as you don't hurt the generated
code.

"You think what it should be" is not "what it should be".

--=20
Xi Ruoyao <xry111@xry111.site>
School of Aerospace Science and Technology, Xidian University