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 To be exact: this is since gcc-6 6.2.0-7 dated Tue, 18 Oct 2016 13:53:00 +0200 on amd64 arm64 armel armhf i386 mips mipsel mips64el ppc64el s390x. > so the kernel build ends before it starts properly with: > |kernel/bounds.c:1:0: error: code model kernel does not support PIC mode > > Is this okay or do we want some kind of check to see if -fno-PIE is supported? > It is mentioned in the 4.4.7 gcc manpage is it is not *that* new :) A naive "git log -Sno-PIE" on gcc sources shows commit 3e7f6cce[1] from Feb 2004, and as gcc automatically supports no-XXX whenever XXX is added, it appears the option is older than that. > Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> > --- > Makefile | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/Makefile b/Makefile > index bf6e44a421df..97296d66b586 100644 > --- 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 > > KBUILD_AFLAGS_KERNEL := > -- > 2.9.3 The patch works for me. I haven't done any but most trivial testing, though. [1]. Using the https://gcc.gnu.org/git/gcc.git git gateway, commit hashes may be different elsewhere. -- A MAP07 (Dead Simple) raspberry tincture recipe: 0.5l 95% alcohol, 1kg raspberries, 0.4kg sugar; put into a big jar for 1 month. Filter out and throw away the fruits (can dump them into a cake, etc), let the drink age at least 3-6 months. -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
