0776365d77
The code assume that meson's cpu_family can be mapped directly to '-D__<cpu_family>__'. This works in a surprising number of cases, but not for a few architectures. PPC uses "powerpc", and RISC-V omits the trailing underscores. ARM and RISC-V require a second define too. Fixes #21900. (I don't think this matters too much: we need *something* so that gnu/stubs.h can be successfully included. But we don't actually call syscalls or depend too much on the host environment, so things should be fine as long as we don't get a compilation error.) (cherry picked from commit e897b07f97cf25e092a4cc8e1144e06564b45d53)
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