Re: 2.6.17-mm5 -- Busted toolchain? -- usr/klibc/exec_l.c:59: undefined reference to `__stack_chk_fail'

Sam Ravnborg
2006-07-01T23:06:47Z

>> > > >
> >> > > > KLIBCLD usr/klibc/libc.so
> >> > > > usr/klibc/execl.o: In function `execl':
...
>
> >https://wiki.ubuntu.com/GccSsp
> >
> >It appears that Ubuntu's Edgy Eft (the development tree) now contains
> >"Stack Smashing Protection" enabled by default. I found a web page
> >that states that -fno-stack-protector can be used to disable this
> >functionality. Interestingly, another web page stated that SSP has
> >been enabled in Redhat compilers for a long time and is now also
> >enabled in Debian SID. Perhaps -fno-stack-protector should be added
> >to the kernel build be default?
>
> Darn it. I don't seem to know how to get -fno-stack-protector to
> work. I ran:
> export CFLAGS=-fno-stack-protector
> make mrproper
> cp ../.config .
> make oldconfig
> CFLAGS=-fno-stack-protector make all install modules modules_install
>
> But I am still getting the errors. Anyone know what I am doing wrong?

For klibc you need to patch scripts/Kbuild.klibc

Appending it to KLIBCWARNFLAGS seems the right place.

Do you know from what gcc version we can start using -fno-stack-protector?

Sam