[PATCH 0/3] perf: Fix missing CET property notes on x86 with -fcf-protection

[Trevor Allison]

When perf is built with -fcf-protection, the x86 binary can lack CET
(IBT/SHSTK) in .note.gnu.property because perf links several static
archives whole-archive: if any input object lacks matching property
notes, the linker drops CET from the final binary.

Fix libbpf EXTRA_CFLAGS handling, C++ flag propagation, and missing
.note.gnu.property sections in x86 assembly (like .note.GNU-stack).
All three are needed for CET to survive the link.

Trevor Allison (3):
  perf build: Preserve EXTRA_CFLAGS when building in-tree libbpf
  perf build: Apply EXTRA_CXXFLAGS to C++ builds
  perf x86: Add .note.gnu.property to assembly linked into perf

 tools/perf/Makefile.config               |  1 +
 tools/perf/Makefile.perf                 |  2 +-
 tools/perf/arch/x86/tests/regs_load.S    | 24 ++++++++++++++++++++++++
 tools/perf/bench/mem-memcpy-x86-64-asm.S | 24 ++++++++++++++++++++++++
 tools/perf/bench/mem-memset-x86-64-asm.S | 24 ++++++++++++++++++++++++
 5 files changed, 74 insertions(+), 1 deletion(-)

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2.50.1 (Apple Git-155)