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Re: [PATCH] BZ #19590: Fixed build of shared objects that use libmvec.so functions
- From: Florian Weimer <fweimer at redhat dot com>
- To: Joseph Myers <joseph at codesourcery dot com>, "H.J. Lu" <hjl dot tools at gmail dot com>
- Cc: Andrew Senkevich <andrew dot n dot senkevich at gmail dot com>, libc-alpha <libc-alpha at sourceware dot org>
- Date: Wed, 10 Feb 2016 17:35:32 +0100
- Subject: Re: [PATCH] BZ #19590: Fixed build of shared objects that use libmvec.so functions
- Authentication-results: sourceware.org; auth=none
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On 02/10/2016 05:33 PM, Joseph Myers wrote:
> On Wed, 10 Feb 2016, H.J. Lu wrote:
>>>> I don't think we should put a GCC bug workaround in glibc. It should
>>>> be fixed or worked around it in GCC.
>>> Since GCC 4.9 vector function name is formed based on asm declaration
>>> name, to support that GCC versions we need to have such workaround.
>> So it is the part of ABI, isn't it?
> It is deliberately only part of the static library ABI, not part of the
> shared library ABI, because the shared libraries should not need more than
> one internal-namespace exported name for the same interface (and it's a
> compiler limitation that the other name exists at all).
I'm still surprised that we ended up in this situation. :-/
Can those distributions who want to support unfixed system compilers
carry this workaround as a local fix?