gh-140421: Fix perf trampoline on older macOS #140422
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* Use mach_absolute_time() when clock_gettime() is not available. * Define MAP_ANONYMOUS to MAP_ANON if the latter is defined and the former is not. This matches what is done elsewhere in the code base in this situation, e.g. mmapmodule.c. * Don't build perf trampoline on ppc systems, where getting this to work would be a lot more effort.
jmroot
requested review from
AA-Turner,
corona10,
emmatyping and
erlend-aasland
as code owners
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mach_absolute_time() whenclock_gettime()is not available.MAP_ANONYMOUStoMAP_ANONif the latter is defined and the former is not. This matches what is done elsewhere in the code base in this situation, e.g.mmapmodule.c.