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From: "simon.chopin at canonical dot com"
 <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug math/30909] New: aarch64: using intrinsic vector types in
 math-vector.h breaks C-parsing tools
Date: Wed, 27 Sep 2023 11:30:44 +0000
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X-Bugzilla-Product: glibc
X-Bugzilla-Component: math
X-Bugzilla-Version: 2.38
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D30909

            Bug ID: 30909
           Summary: aarch64: using intrinsic vector types in math-vector.h
                    breaks C-parsing tools
           Product: glibc
           Version: 2.38
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: math
          Assignee: unassigned at sourceware dot org
          Reporter: simon.chopin at canonical dot com
  Target Milestone: ---

The use of vector types such as __Float32x4_t in the aarch64 math-vector.h
header breaks quite a few programs that are essentially parsing C code but
using GCC as their preprocessor. GCC expands to the paths using its own
intrinsic types, which aren't implemented by the consuming programs.

I'm not sure if this qualifies as a bug in glibc, as it seems reasonable to
rely on those types, but we've seen this happen in quite a few instances in
Ubuntu:

https://bugs.launchpad.net/ubuntu/+source/mumax3/+bug/2032624

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