[3.15] gh-152769: Enable perf trampoline on musl (Alpine Linux) (#152774) (#153456)

gh-152769: Enable perf trampoline on musl (Alpine Linux) (#152774)

(cherry picked from commit b9e8979)

Co-authored-by: Xiaowei Lu <weixlu420302@gmail.com>

Author: vstinner

Misc/NEWS.d/next/Build/2026-07-01-17-53-00.gh-issue-152769.Kp7mQ2.rst

@@ -0,0 +1,4 @@
+Enable the :ref:`perf profiler <perf_profiling>` trampoline on Alpine Linux with the
+musl C library on ``x86_64`` and ``aarch64``. The
+trampoline is architecture-specific and does not depend on the C library, so
+the same assembly trampoline used for glibc is reused for musl.

configure

@@ -3873,6 +3873,8 @@ AC_MSG_CHECKING([perf trampoline])
 AS_CASE([$PLATFORM_TRIPLET],
   [x86_64-linux-gnu], [perf_trampoline=yes],
   [aarch64-linux-gnu], [perf_trampoline=yes],
+  [x86_64-linux-gnu], [perf_trampoline=yes],
+  [x86_64-linux-musl], [perf_trampoline=yes],
   [darwin], [AS_CASE([$MACOSX_DEPLOYMENT_TARGET],
                 [[10.[0-9]|10.1[0-1]]], [perf_trampoline=no],
                 [perf_trampoline=yes]