From: Sven Joachim <svenjoac@gmx.de>
To: Joe Perches <joe@perches.com>
Cc: Adam Borowski <kilobyte@angband.pl>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Michal Marek <mmarek@suse.com>,
linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org,
ben@decadent.org.uk
Subject: Re: [RFC PATCH] kbuild: add -fno-PIE
Date: Mon, 24 Oct 2016 09:38:49 +0200 [thread overview]
Message-ID: <8760oinqly.fsf@turtle.gmx.de> (raw)
In-Reply-To: <1477250598.3561.4.camel@perches.com> (Joe Perches's message of "Sun, 23 Oct 2016 12:23:18 -0700")
On 2016-10-23 12:23 -0700, Joe Perches wrote:
> On Sun, 2016-10-23 at 18:19 +0200, Sven Joachim wrote:
>> On 2016-10-21 23:21 +0200, Adam Borowski wrote:
>> > On Fri, Oct 21, 2016 at 01:16:00PM +0200, Sebastian Andrzej Siewior wrote:
>> > > Debian started to build the gcc with --enable-default-pie by default
> []
>> > > diff --git a/Makefile b/Makefile
> []
>> > > @@ -398,7 +398,7 @@ KBUILD_CPPFLAGS := -D__KERNEL__
>> > > KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
>> > > -fno-strict-aliasing -fno-common \
>> > > -Werror-implicit-function-declaration \
>> > > - -Wno-format-security \
>> > > + -Wno-format-security -fno-PIE \
>> > > -std=gnu89
>
> I've used this here instead:
>
> KBUILD_CFLAGS += $(call cc-option,-fno-pie)
Where exactly do you set that? I tried this patch:
--8<---------------cut here---------------start------------->8---
diff --git a/Makefile b/Makefile
index 93beca4..fde1e21 100644
--- a/Makefile
+++ b/Makefile
@@ -619,6 +619,7 @@ ARCH_AFLAGS :=
ARCH_CFLAGS :=
include arch/$(SRCARCH)/Makefile
+KBUILD_CFLAGS += $(call cc-option,-fno-pie,)
KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
KBUILD_CFLAGS += $(call cc-disable-warning,maybe-uninitialized,)
KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,)
--8<---------------cut here---------------end--------------->8---
But make still fails with it. :-(
,----
| $ LANG=C make
| scripts/kconfig/conf --silentoldconfig Kconfig
| SYSTBL arch/x86/entry/syscalls/../../include/generated/asm/syscalls_32.h
| SYSHDR arch/x86/entry/syscalls/../../include/generated/asm/unistd_32_ia32.h
| SYSHDR arch/x86/entry/syscalls/../../include/generated/asm/unistd_64_x32.h
| SYSTBL arch/x86/entry/syscalls/../../include/generated/asm/syscalls_64.h
| SYSHDR arch/x86/entry/syscalls/../../include/generated/uapi/asm/unistd_32.h
| SYSHDR arch/x86/entry/syscalls/../../include/generated/uapi/asm/unistd_64.h
| SYSHDR arch/x86/entry/syscalls/../../include/generated/uapi/asm/unistd_x32.h
| HOSTCC arch/x86/tools/relocs_32.o
| HOSTCC arch/x86/tools/relocs_64.o
| HOSTCC arch/x86/tools/relocs_common.o
| HOSTLD arch/x86/tools/relocs
| CHK include/config/kernel.release
| UPD include/config/kernel.release
| Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: -fstack-protector-strong available but compiler is broken
| Makefile:1066: recipe for target 'prepare-compiler-check' failed
| make: *** [prepare-compiler-check] Error 1
`----
Cheers,
Sven
next prev parent reply other threads:[~2016-10-24 7:39 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-21 11:16 [RFC PATCH] kbuild: add -fno-PIE Sebastian Andrzej Siewior
2016-10-21 21:21 ` Adam Borowski
2016-10-23 16:19 ` Sven Joachim
2016-10-23 19:23 ` Joe Perches
2016-10-24 7:38 ` Sven Joachim [this message]
2016-10-24 7:43 ` Sebastian Andrzej Siewior
2016-10-24 17:32 ` Sven Joachim
2016-10-24 17:32 ` Sven Joachim
2016-10-24 17:48 ` Joe Perches
2016-10-25 7:30 ` Sebastian Andrzej Siewior
2016-10-26 17:51 ` Sven Joachim
2016-10-27 7:28 ` Sebastian Andrzej Siewior
2016-10-28 23:00 ` Andrew Morton
2016-10-29 10:10 ` Tomas Janousek
2016-10-29 17:03 ` Sven Joachim
2016-10-29 19:21 ` Tomas Janousek
2016-10-29 21:18 ` Sven Joachim
2016-10-24 9:57 ` Joe Perches
2016-10-27 17:09 ` Shuah Khan
2016-10-28 8:09 ` Sebastian Andrzej Siewior
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