Alan-Jowett / libbtf / 21414311593

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Support big-endian BPF programs (#183)

* Add big-endian BPF program support

Co-authored-by: Alan-Jowett <20480683+Alan-Jowett@users.noreply.github.com>

* Fix code review findings: Don't swap magic field in headers

Co-authored-by: Alan-Jowett <20480683+Alan-Jowett@users.noreply.github.com>

* Add clarifying comment about compile-time template evaluation

Co-authored-by: Alan-Jowett <20480683+Alan-Jowett@users.noreply.github.com>

* Fix unused function warning causing CI failure

Remove unused swap_bytes template specializations for uint16_t and int32_t.
All BTF struct fields are uint32_t except magic (uint16_t) which is
intentionally not swapped as it's used for endianness detection.

This fixes MSVC warning C4505 treated as error.

Signed-off-by: Alan Jowett <alan.jowett@microsoft.com>

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Signed-off-by: Alan Jowett <alan.jowett@microsoft.com>
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: Alan-Jowett <20480683+Alan-Jowett@users.noreply.github.com>
Co-authored-by: Alan Jowett <alan.jowett@microsoft.com>

72 of 104 new or added lines in 2 files covered. (69.23%)

2231 of 2351 relevant lines covered (94.9%)

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