From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
	id 22EDC3858412; Sat, 21 Oct 2023 15:22:05 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 22EDC3858412
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1697901725;
	bh=VbRLDzUNS3FfdFLMegeiz3NZp1BOfMus6KT/I+e16FE=;
	h=From:To:Subject:Date:From;
	b=uZVeFQC/et04UVXzoAL9PQT5UdKY0K+oiXYCiby+Q7HwXxJfDEZznFSb6dmvV+gtH
	 YXUkK/rREU4RJw99dAioLA0AIxG4+qsN3PAwGXPAO7cZPgoLjHfxi6L4behZwOjUsJ
	 dd7NMF2p4Nv7WrShnNi+qzKUz0TzEW97Js/TTzK8=
From: "simon at pushface dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/111909] New: Filename case sensitivity defaulted wrongly on
 macOS
Date: Sat, 21 Oct 2023 15:22:04 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: ada
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: simon at pushface dot org
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status
 bug_severity priority component assigned_to reporter cc target_milestone
 attachments.created
Message-ID: <bug-111909-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
List-Id: <gcc-bugs.sourceware.org>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111909

            Bug ID: 111909
           Summary: Filename case sensitivity defaulted wrongly on macOS
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: ada
          Assignee: unassigned at gcc dot gnu.org
          Reporter: simon at pushface dot org
                CC: dkm at gcc dot gnu.org
  Target Milestone: ---

Created attachment 56167
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D56167&action=3Dedit
Demo of code to determine case sensitivity

In gcc/ada/adaint.c(__gnat_get_file_names_case_sensitive), the
assumption for __APPLE__ is that file names are case-insensitive
unless __arm__ or __arm64__ are defined, in which case file names are
declared case-sensitive.

The associated comment is
   "By default, we suppose filesystems aren't case sensitive on
   Windows and Darwin (but they are on arm-darwin)."

This change was made in commit b54d1d39d30c (in github gcc-mirror).

This means that on aarch64-apple-darwin, file names are declared
case-sensitive.

I understand that GCC does not currently support iOS/tvOS/watchOS, so
we could assume macOS.

On macOS, the default filesystem is case-insensitive; changing this
function to reflect that would be an improvement. However, it's
possible to create case-sensitive filesystems, and some users do when
dealing with OSS code. It would be good to check the actual filesystem
in use.=