From: Zhenzhong Duan <zhenzhong.duan@oracle.com>
To: Meelis Roos <mroos@linux.ee>,
Thomas Gleixner <tglx@linutronix.de>,
David Woodhouse <dwmw@amazon.co.uk>
Cc: LKML <linux-kernel@vger.kernel.org>, yamada.masahiro@socionext.com
Subject: Re: Compiling with old gcc breaks when CONFIG_RETPOLINE is off
Date: Wed, 5 Dec 2018 09:30:07 +0800 [thread overview]
Message-ID: <3f72d5fa-cfed-e1a0-4f6c-90f8d1de1ace@oracle.com> (raw)
In-Reply-To: <6eeee8da-82ac-f527-9278-7ebcc8756ea1@linux.ee>
Hi Meelis,
Could you try below change? It force syncconfig for any 'make *config"
so that autoconf.h and auto.conf are always updated.
diff --git a/scripts/kconfig/conf.c b/scripts/kconfig/conf.c
index 98e0c7a..802875b 100644
--- a/scripts/kconfig/conf.c
+++ b/scripts/kconfig/conf.c
@@ -38,7 +38,7 @@ enum input_mode {
static int indent = 1;
static int tty_stdio;
-static int sync_kconfig;
+static int sync_kconfig = 1;
static int conf_cnt;
static char line[PATH_MAX];
static struct menu *rootEntry;
@@ -506,11 +506,11 @@ int main(int ac, char **av)
* Suppress distracting "configuration written
to ..."
*/
conf_set_message_callback(NULL);
- sync_kconfig = 1;
break;
case defconfig:
case savedefconfig:
defconfig_file = optarg;
+ sync_kconfig = 0;
break;
case randconfig:
{
@@ -537,13 +537,15 @@ int main(int ac, char **av)
srand(seed);
break;
}
+ case listnewconfig:
+ sync_kconfig = 0;
+ /* fall through */
case oldaskconfig:
case oldconfig:
case allnoconfig:
case allyesconfig:
case allmodconfig:
case alldefconfig:
- case listnewconfig:
case olddefconfig:
break;
case '?':
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?
>
next prev parent reply other threads:[~2018-12-05 1:30 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-04 9:58 Compiling with old gcc breaks when CONFIG_RETPOLINE is off Meelis Roos
2018-12-04 13:57 ` Zhenzhong Duan
2018-12-05 1:30 ` Zhenzhong Duan [this message]
2018-12-05 3:00 ` Masahiro Yamada
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