Le vendredi 1 novembre 2024, 11:57:17 UTC Aurelien Jarno a écrit : Hi aurelien, > control: severity -1 wishlist > > Hi, > > On 2024-10-31 11:24, Bastien Roucariès wrote: > > Package: libc6-dev > > Version: 2.40-3 > > Severity: normal > > Tags: upstream > > > > Dear Maintainer, > > > > Newer hwcap/hwcap2 are not in sync for arm* particularly arm32 (including > > crc32 > > flags) > > The hwcap mechanism has been deprecated in glibc 2.33 in favor of the > glibc-hwcaps mechanism, and removed in glibc 2.37. Instead of relying on > a huge number of CPU feature combinations, the new mechanism is based on > architecture baseline level. > > That said support for the glibc-hwcaps mechanism has only been added on > powerpc, s390 and x86-64. I don't think there is any interest in > standardizing the architecture baseline level on arm32.
We need in fact to get the #define HWCAP2_CRC32 (1 << 4) for masking unsigned long getauxval(unsigned long type); HWCAP_NEON is defined by including #include <sys/auxv.h> but no HWCAP2_... This is for me a bug on header. CRC32 detection for arm32/arm64 get about 400 pages on debian sources, so glibc-hwcaps is may be needed for arm* Bastien > > Regards > Aurelien > >
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