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[debbugs-tracker] bug#31380: closed (grub fails to build on i686-linux)

From: GNU bug Tracking System
Subject: [debbugs-tracker] bug#31380: closed (grub fails to build on i686-linux)
Date: Sat, 16 Jun 2018 08:24:03 +0000

Your message dated Sat, 16 Jun 2018 04:22:35 -0400
with message-id <address@hidden>
and subject line Re: bug#31380: grub fails to build on i686-linux
has caused the debbugs.gnu.org bug report #31380,
regarding grub fails to build on i686-linux
to be marked as done.

(If you believe you have received this mail in error, please contact

31380: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=31380
GNU Bug Tracking System
Contact address@hidden with problems
--- Begin Message --- Subject: [core-updates] grub fails to build on i686-linux Date: Mon, 07 May 2018 15:59:56 -0400
On the 'core-updates' branch, both 'grub' and 'grub-efi' fail to build
on i686-linux.  See below for the relevant excerpt from the build log
of 'grub-efi', but the error is the same for both.



--8<---------------cut here---------------start------------->8---
-DGRUB_MACHINE=I386_EFI -m32 -nostdinc -isystem 
 -I../include -I../include -DGRUB_FILE=\"lib/i386/relocator.c\" -I. -I. -I.. 
-I.. -I../include -I../include -I../grub-core/lib/libgcrypt-grub/src/    
-D_FILE_OFFSET_BITS=64 -Os -Wall -W -Wshadow -Wpointer-arith -Wundef 
-Wchar-subscripts -Wcomment -Wdeprecated-declarations -Wdisabled-optimization 
-Wdiv-by-zero -Wfloat-equal -Wformat-extra-args -Wformat-security -Wformat-y2k 
-Wimplicit -Wimplicit-function-declaration -Wimplicit-int -Wmain 
-Wmissing-braces -Wmissing-format-attribute -Wmultichar -Wparentheses 
-Wreturn-type -Wsequence-point -Wshadow -Wsign-compare -Wswitch -Wtrigraphs 
-Wunknown-pragmas -Wunused -Wunused-function -Wunused-label -Wunused-parameter 
-Wunused-value  -Wunused-variable -Wwrite-strings -Wnested-externs 
-Wstrict-prototypes -g -Wredundant-decls -Wmissing-prototypes 
-Wmissing-declarations  -Wextra -Wattributes -Wendif-labels -Winit-self 
-Wint-to-pointer-cast -Winvalid-pch -Wmissing-field-initializers -Wnonnull 
-Woverflow -Wvla -Wpointer-to-int-cast -Wstrict-aliasing -Wvariadic-macros 
-Wvolatile-register-var -Wpointer-sign -Wmissing-include-dirs 
-Wmissing-prototypes -Wmissing-declarations -Wformat=2 -march=i386 -m32 
-falign-jumps=1 -falign-loops=1 -falign-functions=1 -freg-struct-return 
-mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow -msoft-float 
-fno-dwarf2-cfi-asm -mno-stack-arg-probe -fno-asynchronous-unwind-tables 
-fno-unwind-tables -Qn -fno-stack-protector -Wtrampolines -Werror   
-ffreestanding   -MT lib/i386/relocator_module-relocator.o -MD -MP -MF 
lib/i386/.deps-core/relocator_module-relocator.Tpo -c -o 
lib/i386/relocator_module-relocator.o `test -f 'lib/i386/relocator.c' || echo 
lib/i386/relocator64.S: Assembler messages:
lib/i386/relocator64.S:66: Error: unknown pseudo-op: `.code64'
lib/i386/relocator64.S:74: Error: bad register name `%rax'
lib/i386/relocator64.S:88: Error: bad register name `%rsp'
lib/i386/relocator64.S:98: Error: bad register name `%rax'
lib/i386/relocator64.S:132: Error: bad register name `%rip)'
make[3]: *** [Makefile:28996: lib/i386/relocator_module-relocator64.o] Error 1
make[3]: *** Waiting for unfinished jobs....
mv -f lib/.deps-core/crypto_module-crypto.Tpo 
mv -f lib/i386/.deps-core/relocator_module-relocator.Tpo 
mv -f fs/.deps-core/xfs_module-xfs.Tpo fs/.deps-core/xfs_module-xfs.Po
make[3]: Leaving directory 
make[2]: *** [Makefile:23531: all] Error 2
make[2]: Leaving directory 
make[1]: *** [Makefile:10904: all-recursive] Error 1
make[1]: Leaving directory '/tmp/guix-build-grub-efi-2.02.drv-0/grub-2.02'
make: *** [Makefile:3130: all] Error 2
--8<---------------cut here---------------end--------------->8---

--- End Message ---
--- Begin Message --- Subject: Re: bug#31380: grub fails to build on i686-linux Date: Sat, 16 Jun 2018 04:22:35 -0400 User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux)
Hi Ludovic,

address@hidden (Ludovic Courtès) writes:

> Mark H Weaver <address@hidden> skribis:
>> Here's a proposed patch that I hope will fix the problem, although I'm
>> unable to easily test it because I no longer use binary substitutes, and
>> I have not yet built the core packages for i686-linux.
>> However, I've applied this patch to my x86_64 system, and verified that
>> it does not cause any problems there.
>> Would someone be willing to test it and report back?
> I tried it and it initially failed to build with:
> I fixed this and pushed as a7c8716928a240ba2c36d360e4ffeb447671fa6b.

Thanks very much!  Hydra has now successfully built GRUB on i686-linux,
so I'm closing this bug.

> I wanted to try ‘guix system vm-image -s i686-linux’ on my x86_64 laptop
> to make sure GRUB runs fine.  Unfortunately, I stumbled upon another
> issue, which is that qemu-system-i386 built for i686-linux segfaults at
> startup:
> I was able to work around it by disabling KVM:
> diff --git a/gnu/build/vm.scm b/gnu/build/vm.scm
> index 73d0191de..a675111d4 100644
> --- a/gnu/build/vm.scm
> +++ b/gnu/build/vm.scm
> @@ -104,7 +104,8 @@ the #:references-graphs parameter of 'derivation'."
>        ;; hardware virtualization to still use these commands.  KVM support is
>        ;; still buggy on some ARM32 boards. Do not use it even if available.
>        ,@(if (and (file-exists? "/dev/kvm")
> -                 (not target-arm32?))
> +                 (not target-arm32?)
> +                 (not (string-suffix? "-i386" qemu)))
>              '("-enable-kvm")
>              '())
> I suspect a KVM bug in Linux 4.17 though, because running the same
> ‘qemu-system-i386’ binary under strace works…  Perhaps worth applying
> the patch above in the meantime, WDYT?

It would be better to auto-detect the presence of KVM support at run
time, but that's a wishlist item that deserves its own ticket.  This is
good enough for now.

> Anyway, with this patch I successfully run:
>   guix system vm-image gnu/system/examples/bare-bones.tmpl -s i686-linux
> and confirmed that the resulting image would boot through GRUB.

Sounds great, thanks again!


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