support perf trampoline on -linux-musl

Feature or enhancement

Proposal:

currently the autotools does the following check

AS_CASE([$PLATFORM_TRIPLET],
  [x86_64-linux-gnu], [perf_trampoline=yes],
  [aarch64-linux-gnu], [perf_trampoline=yes],
  [perf_trampoline=no]
)

simply making it

AS_CASE([$PLATFORM_TRIPLET],
  [x86_64-linux-gnu], [perf_trampoline=yes],
  [x86_64-linux-musl], [perf_trampoline=yes],
  [aarch64-linux-gnu], [perf_trampoline=yes],
  [aarch64-linux-musl], [perf_trampoline=yes],
  [perf_trampoline=no]
)

makes the trampoline build on musl libc systems too, and it seems to work fine: https://img.ayaya.dev/yT9j39Lfeb8u

it doesn't seem like the assembly actually depends on libc support. maybe it should check -linux-* instead?

in any case just adding the above triples seems to work ok, unless i'm missing something, so it would be nice if it was added :)

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

No response

Linked PRs

• gh-122370
• gh-153424
• gh-153457

Finde die im Issue beschriebene autotools-Prüfung mit AS_CASE([$PLATFORM_TRIPLET]), und überprüfe dann zuerst die verknüpften PRs gh-122370, gh-153424 und gh-153457. Bestätige die unterstützten musl-Tripel und validiere den Trampoline-Build auf den betroffenen Linux-musl-Plattformen; abgeschlossen bedeutet, dass der Build mit aktiviertem perf_trampoline erfolgreich ist.