build: note that sysctl was removed from Linux #33111

1. 
   fanquake commented at 10:07 am on August 1, 2025: member

   https://kernelnewbies.org/Linux_5.5#Core_.28various.29.

   The checks need to hang around until we no-longer support kernels older than 5.5.

2. build: note that sysctl was removed from Linux

   https://kernelnewbies.org/Linux_5.5#Core_.28various.29.
   
   The checks need to hang around until we no-longer support kernels older
   than 5.5.

   a78dfd7cee
3. DrahtBot added the label Build system on Aug 1, 2025
4. 
   DrahtBot commented at 10:07 am on August 1, 2025: contributor

   The following sections might be updated with supplementary metadata relevant to reviewers and maintainers.

   Code Coverage & Benchmarks

   For details see: https://corecheck.dev/bitcoin/bitcoin/pulls/33111.

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5. 
   janb84 commented at 2:12 pm on August 1, 2025: contributor

   ACK a78dfd7cee4d25a455bd35c5ef2bd7d5cd2072b0

   PR changes the error message of sysctl.h when used on linux to reflect current state (from deprecated to removed)

6. 
   luke-jr commented at 1:48 am on August 5, 2025: member

   If it’s removed, the check fails anyway…? The current message seems better IMO
7. fanquake closed this on Aug 13, 2025

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8. fanquake deleted the branch on Aug 13, 2025

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fanquake DrahtBot janb84 luke-jr

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Build system