GNU bug report logs - #75614
Fix FTBFS on CentOS 8 and CentOS 8 Stream

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Pádraig Brady <P <at> draigBrady.com>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#75614: closed (Fix FTBFS on CentOS 8 and CentOS 8 Stream)
Date: Thu, 16 Jan 2025 22:19:02 +0000

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Your message dated Thu, 16 Jan 2025 22:18:22 +0000
with message-id <32d931da-1360-4148-a84f-21c0f2599348 <at> draigBrady.com>
and subject line Re: bug#75614: Fix FTBFS on CentOS 8 and CentOS 8 Stream
has caused the debbugs.gnu.org bug report #75614,
regarding Fix FTBFS on CentOS 8 and CentOS 8 Stream
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


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From: Bruno Haible <bruno <at> clisp.org>
To: bug-coreutils <at> gnu.org
Subject: Fix FTBFS on CentOS 8 and CentOS 8 Stream
Date: Thu, 16 Jan 2025 22:14:10 +0100

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Testing a current coreutils with a current gnulib on CentOS 8 and
CentOS 8 Stream, I see the same compilation error on both:

  CC       src/libcksum_avx512_a-cksum_avx512.o
../src/cksum_avx512.c: In function 'cksum_avx512':
../src/cksum_avx512.c:60:22: warning: implicit declaration of function '_mm512_set_epi8'; did you mean '_mm512_set1_epi8'? [-Wimplicit-function-declaration]
   shuffle_constant = _mm512_set_epi8 (0, 1, 2, 3, 4, 5, 6, 7, 8,
                      ^~~~~~~~~~~~~~~
                      _mm512_set1_epi8
../src/cksum_avx512.c:60:20: error: incompatible types when assigning to type '__m512i' {aka '__vector(8) long long int'} from type 'int'
   shuffle_constant = _mm512_set_epi8 (0, 1, 2, 3, 4, 5, 6, 7, 8,
                    ^
make[2]: *** [Makefile:20396: src/libcksum_avx512_a-cksum_avx512.o] Error 1

The cause is that USE_AVX512_CRC32 was determined to be true at configure
time, although the compiler does not support all builtin functions used
by cksum_avx512.c.

This proposed patch fixed it. I verified that on Ubuntu 24.04 and
CentOS Stream 9, USE_AVX512_CRC32 remains true.

[0001-build-Fix-compilation-error-on-CentOS-8-Stream.patch (text/x-patch, attachment)]

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From: Pádraig Brady <P <at> draigBrady.com>
To: Bruno Haible <bruno <at> clisp.org>, 75614-done <at> debbugs.gnu.org
Subject: Re: bug#75614: Fix FTBFS on CentOS 8 and CentOS 8 Stream
Date: Thu, 16 Jan 2025 22:18:22 +0000

On 16/01/2025 21:14, Bruno Haible via GNU coreutils Bug Reports wrote:
> Testing a current coreutils with a current gnulib on CentOS 8 and
> CentOS 8 Stream, I see the same compilation error on both:
> 
>    CC       src/libcksum_avx512_a-cksum_avx512.o
> ../src/cksum_avx512.c: In function 'cksum_avx512':
> ../src/cksum_avx512.c:60:22: warning: implicit declaration of function '_mm512_set_epi8'; did you mean '_mm512_set1_epi8'? [-Wimplicit-function-declaration]
>     shuffle_constant = _mm512_set_epi8 (0, 1, 2, 3, 4, 5, 6, 7, 8,
>                        ^~~~~~~~~~~~~~~
>                        _mm512_set1_epi8
> ../src/cksum_avx512.c:60:20: error: incompatible types when assigning to type '__m512i' {aka '__vector(8) long long int'} from type 'int'
>     shuffle_constant = _mm512_set_epi8 (0, 1, 2, 3, 4, 5, 6, 7, 8,
>                      ^
> make[2]: *** [Makefile:20396: src/libcksum_avx512_a-cksum_avx512.o] Error 1
> 
> The cause is that USE_AVX512_CRC32 was determined to be true at configure
> time, although the compiler does not support all builtin functions used
> by cksum_avx512.c.
> 
> This proposed patch fixed it. I verified that on Ubuntu 24.04 and
> CentOS Stream 9, USE_AVX512_CRC32 remains true.

Ah right, it seems this fails on GCC 8 without your patch.

Pushed.

Marking this as done.

thanks!
Pádraig

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