[29.x] Backports #34680

1. 
   fanquake commented at 10:11 am on February 26, 2026: member

   Backports:

   • #34093
   • #34510
   • #34561
   • #34671
2. doc: fix broken bpftrace installation link

   The bpftrace project moved from iovisor/bpftrace to bpftrace/bpftraceand
   removed the separate INSTALL.md file. Installation instructionsare now
   in the README.md Quick Start section.
   
   Github-Pull: #34510
   Rebased-From: 42ee31e80c99bdb4d6affdc9dc22a0f3d5da7b59

   5910bd3b5d
3. doc: Update Guix install for Debian/Ubuntu

   Fixes https://github.com/bitcoin/bitcoin/issues/33982
   
   Co-authored-by: Purple Ninja <129023353+ToRyVand@users.noreply.github.com>
   
   Github-Pull: #34671
   Rebased-From: faa70ca7642bd653cbd2e544c17fa58d2672afa4

   532afe909e
4. wallet: rpc: manpage: fix example missing `fee_rate` argument

   The function signature for the `send` RPC is:
   ```
   send [{"address":amount,...},{"data":"hex"},...] ( conf_target "estimate_mode" fee_rate options version )
   ```
   
   The last example in the manpage is missing the `fee_rate` arg, but is trying to specify the `options` arg, by index.
   The parser confuses the intended `options` arg as the missing `fee_rate` arg.
   
   See:
   ```
   $ bitcoin-cli -rpcuser=doggman -rpcpassword=donkey -rpcport=18554 -regtest send '{"bcrt1qusm48zmlzwr32csxdw4ar7atw260h22c9ten9l": 0.1}' 1 economical '{"add_to_wallet": false, "inputs": [{"txid":"0b7e1a471dc948b7a6187936b16e6d7d9833629b2f9dd8a392eb89928f63aaad", "vout":0}]}'
   error code: -8
   error message:
   Cannot specify both conf_target and fee_rate. Please provide either a confirmation target in blocks for automatic fee estimation, or an explicit fee rate.
   ```
   vs
   ```
   $ bitcoin-cli -rpcuser=doggman -rpcpassword=donkey -rpcport=18554 -regtest send '{"bcrt1qusm48zmlzwr32csxdw4ar7atw260h22c9ten9l": 0.1}' 1 economical null '{"add_to_wallet": false, "inputs": [{"txid":"0b7e1a471dc948b7a6187936b16e6d7d9833629b2f9dd8a392eb89928f63aaad", "vout":0}]}'
   {
     "psbt": "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",
     "txid": "625b71b314a6ac4f738634e29dc007cd5edc0427c1ae96ab706d06a62910cea2",
     "hex": "02000000000101adaa638f9289eb92a3d89d2f9b6233987d6d6eb1367918a6b748c91d471a7e0b0000000000fdffffff0244760f0400000000160014a4b0f026efb01511cb40080a01bd29b24ed455dd8096980000000000160014e437538b7f13871562066babd1fbab72b4fba9580247304402204953578a5b52bb0f47da8759c8a8a3056fdd05561e2cf1c1ebdf0f4bbf23c6320220426373b317cd4f48b334d21e2e79091e858bb10c566eec9939d627a3a612a79f012103454a758552c81a56a310704c33aea41e7c162de6101b3ebbe38ea84615776b1900000000",
     "complete": true
   }
   ```
   
   Github-Pull: #34561
   Rebased-From: 50cf6838e6aa51e0d712cbc1e13d686253bc8fe0

   98af76f875
5. DrahtBot added the label Backport on Feb 26, 2026
6. fanquake added this to the milestone 29.4 on Feb 26, 2026
7. 
   DrahtBot commented at 10:11 am on February 26, 2026: contributor

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8. netif: fix compilation warning in QueryDefaultGatewayImpl()

   ```
   src/common/netif.cpp:137:51: error: comparison of integers of different signs: 'int64_t' (aka 'long') and 'unsigned long' [-Werror,-Wsign-compare]
     137 |         for (nlmsghdr* hdr = (nlmsghdr*)response; NLMSG_OK(hdr, recv_result); hdr = NLMSG_NEXT(hdr, recv_result)) {
         |                                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~
   /usr/include/netlink/netlink.h:220:31: note: expanded from macro 'NLMSG_OK'
     220 | #define NLMSG_OK(_hdr, _len)            NL_ITEM_OK(_hdr, _len, NLMSG_HDRLEN, _NLMSG_LEN)
         |                                         ^                ~~~~  ~~~~~~~~~~~~
   /usr/include/netlink/netlink.h:203:10: note: expanded from macro 'NL_ITEM_OK'
     203 |         ((_len) >= _hlen && _LEN_M(_ptr) >= _hlen && _LEN_M(_ptr) <= (_len))
         |           ~~~~  ^  ~~~~~
   1 error generated.
   ```
   
   Happens on FreeBSD 15.0, with the default compiler (Clang 19).
   
   On FreeBSD 14, `/usr/include/netlink/netlink.h` contains:
   ```
    #define NLMSG_HDRLEN                    ((int)sizeof(struct nlmsghdr))
   ```
   
   On FreeBSD 15, `/usr/include/netlink/netlink.h` contains:
   ```
    #define NLMSG_HDRLEN                    (sizeof(struct nlmsghdr))
   ```
   
   Co-authored-by: Hennadii Stepanov <32963518+hebasto@users.noreply.github.com>
   
   Github-Pull: #34093
   Rebased-From: c1361fc42dd60606fcd6273cede1083cd88866a2

   490cd874a4
9. doc: update release notes for v29.x 98ea6caed5
10. fanquake force-pushed on Feb 27, 2026
11. fanquake marked this as ready for review on Mar 9, 2026
12. fanquake requested review from marcofleon on Mar 9, 2026
13. marcofleon approved
14. 
    marcofleon commented at 4:35 pm on March 9, 2026: contributor

    ACK 98ea6caed5259c279f7f4794fbafb67ab078e9ae
15. fanquake merged this on Mar 9, 2026
16. fanquake closed this on Mar 9, 2026

    ---

17. fanquake deleted the branch on Mar 9, 2026

Contributors
fanquake DrahtBot marcofleon

Labels
Backport

Milestone
29.4