Messages in this thread | ![/](/images/icornerl.gif) | | Subject | Re: Compiling with old gcc breaks when CONFIG_RETPOLINE is off | From | Zhenzhong Duan <> | Date | Tue, 4 Dec 2018 21:57:22 +0800 |
| |
Since commit '315bab4e972d kbuild: fix endless syncconfig in case arch Makefile sets CROSS_COMPILE',
arch/$(SRCARCH)/Makefile is moved ahead of include/config/%.conf synchonization in root Makefile.
So all the CONFIG_* option used in arch/$(SRCARCH)/Makefile may have stale value if they were just updated in .config.
This looks like an issue. I'm not familiar with kbuild. Ccing Yamada for help.
Thanks
Zhenzhong
On 2018/12/4 17:58, Meelis Roos wrote: > Just tried 4.20-rc5 on an old K6-2 PC with gcc 5.3.1, got an error > about non-retpoline compiler, > turned CONFIG_RETPOLINE off and retried. > > To my surprise, compilation still breaks with > arch/x86/Makefile:224: *** You are building kernel with non-retpoline > compiler, please update your compiler.. Stop. > > As I read the Makefile, it should error only when CONFIG_RETPOLINE is > enabled, but it still breaks. > > $ grep -r CONFIG_RETPOLINE .config > # CONFIG_RETPOLINE is not set > > $ grep -r CONFIG_RETPOLINE include/ > include/generated/autoconf.h:#define CONFIG_RETPOLINE 1 > include/config/auto.conf:CONFIG_RETPOLINE=y > > So the headers have not been updated yet, maybe? >
| ![\](/images/icornerr.gif) |