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buildflags.md: Document -mbranch-protection=standard for aarch64

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Florian Weimer 2021-11-15 12:32:38 +01:00
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@ -264,6 +264,8 @@ not), but their selection depends on the architecture:
ppc64le, s390x, x86_64).
* `-fcf-protection`: Instrument binaries to guard against
ROP/JOP attacks. Used on i686 and x86_64.
* `-mbranch-protection=standard`: Instrument binaries to guard against
ROP/JOP attacks. Used on aarch64.
* `-m64` and `-m32`: Some GCC builds support both 32-bit and 64-bit in
the same compilation. For such architectures, the RPM build process
explicitly selects the architecture variant by passing this compiler