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gentoo-find
n00b
Joined: 07 Apr 2018
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Ant P.
Watchman
Joined: 18 Apr 2009
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 Posted: Sat Jan 12, 2019 6:44 am Post subject: |
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| Add it to your *FLAGS vars in make.conf and emerge -e @world. |
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gentoo-find
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Joined: 07 Apr 2018
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| Posted: Sat Jan 12, 2019 10:22 am Post subject: |
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| Ant P. wrote: | | Add it to your *FLAGS vars in make.conf and emerge -e @world. |
COMMON_FLAGS="-fstack-clash-protection" ? |
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fedeliallalinea
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Joined: 08 Mar 2003
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| Posted: Sat Jan 12, 2019 10:26 am Post subject: |
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| gentoo-find wrote: | | Ant P. wrote: | | Add it to your *FLAGS vars in make.conf and emerge -e @world. |
COMMON_FLAGS="-fstack-clash-protection" ? |
I think Ant P. means
| Code: | CFLAGS="<your current cflags> -fstack-clash-protection"
CXXFLAGS="${CFLAGS}" |
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Questions are guaranteed in life; Answers aren't. |
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Hu
Moderator
Joined: 06 Mar 2007
Posts: 21631
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| Posted: Sat Jan 12, 2019 5:02 pm Post subject: |
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Also, be sure you use a gcc that understands that option. It appears to be new in 8.x. If you use it in an older version, gcc will reject it and the build will fail. | Code: | $ gcc-7.3.0 -x c -o /dev/null /dev/null -c -fstack-clash-protection
gcc-7.3.0: error: unrecognized command line option '-fstack-clash-protection'; did you mean '-fstack-protector'?
$ gcc-8.2.0 -x c -o /dev/null /dev/null -c -fstack-clash-protection
$ |
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fedeliallalinea
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| Posted: Sat Jan 12, 2019 9:11 pm Post subject: |
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| Hu wrote: | | Also, be sure you use a gcc that understands that option. It appears to be new in 8.x. If you use it in an older version, gcc will reject it and the build will fail.] |
Thanks for the tips Hu, I missed this one.
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kurly
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Joined: 02 Apr 2012
Posts: 260
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| Posted: Sat Jan 12, 2019 9:44 pm Post subject: |
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| fedeliallalinea wrote: | | Hu wrote: | | Also, be sure you use a gcc that understands that option. It appears to be new in 8.x. If you use it in an older version, gcc will reject it and the build will fail.] |
Thanks for the tips Hu, I missed this one. |
Should be on already?
| Code: | kurly@smile ~ $ LANG=C gcc-8.2.0 -Q --help=common | fgrep stack-clash
-fstack-clash-protection [enabled] |
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Tom_
Guru
Joined: 20 May 2004
Posts: 444
Location: France
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| Posted: Fri Feb 08, 2019 4:23 pm Post subject: |
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| I wonder if any of you has already enabled this flag globally. Does this flag cause compilation issue ? |
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Ant P.
Watchman
Joined: 18 Apr 2009
Posts: 6920
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| Posted: Fri Feb 08, 2019 6:49 pm Post subject: |
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| Tom_ wrote: | | I wonder if any of you has already enabled this flag globally. Does this flag cause compilation issue ? |
Evidently not, if you'd read the post directly above yours you'll see we already all have it enabled. |
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Tom_
Guru
Joined: 20 May 2004
Posts: 444
Location: France
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| Posted: Fri Feb 08, 2019 7:13 pm Post subject: |
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| Of course I read the post above but I didn't understand it at first. I thought that this command showed gcc capabilities (to show that gcc-8 was required for this flag) but not actual compiler flags. Sorry |
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Moonboots
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Networking & Security
