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how can I add cflags to use debian/rules

Asked by lyl

how can I add cflags to use debian/rules to build disco or other release kernel

such as add the gcc's flag "-fno-stack-protected" to avoid the error of stack-protected

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Manfred Hampl
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Manfred Hampl (m-hampl) said : 		#1

Ubuntu disco is not supported any more, see https://wiki.ubuntu.com/Releases
(the same for eoan)

and by the way, as far as I know the flag is named "-fno-stack-protector", not "-fno-stack-protected"

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lyl (liyl) said : 		#2

yeah ,I want to add the flag "-fno-stack-protector" because the gcc reports that "xxxx _stack_guards"

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Manfred Hampl (m-hampl) said : 		#3

(un)-setting stack protection is done in the kernel config, see e.g. https://github.com/torvalds/linux/blob/master/arch/Kconfig#L484

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lyl (liyl) said : 		#4

an errors about kernel/traps.c 328 undefined reference to `__stack_chk_guard`

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Best Manfred Hampl (m-hampl) said : 		#5

Are you sure that your approach makes sense?
stack-protection is a security feature to detect stack corruption (e.g. caused by buffer overflow).
Why do you want to turn it off?

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lyl (liyl) said : 		#6

Thanks Manfred Hampl, that solved my question.