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x86: Document -fcf-protection requires i686 or newer

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PR target/98667
	* doc/invoke.texi: Document -fcf-protection requires i686 or
	new.
This commit is contained in:
H.J. Lu 2021-10-21 09:45:14 -07:00
parent 6aceeb3fb6
commit 1373066a46
1 changed files with 2 additions and 1 deletions
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gcc/doc/invoke.texi
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@ -15542,7 +15542,8 @@ which functions and calls should be skipped from instrumentation
(@pxref{Function Attributes}).
Currently the x86 GNU/Linux target provides an implementation based
on Intel Control-flow Enforcement Technology (CET).
on Intel Control-flow Enforcement Technology (CET) which works for
i686 processor or newer.
@item -fstack-protector
@opindex fstack-protector