Hi,
I would to like to use the rtai kernel patches on Debian Wheezy
(Debian-Package rtai-source) on the i386 architecture, which are
currently only available for various releases of Linux 2.6.
As the most recent kernel patch included in rtai-source was
hal-linux-2.6.32.11-x86-2.6-03.patch.gz, I first tried to compile the
vanilla kernel 2.6.32.11 with gcc-4.7 from Wheezy and using make-kpkg
(with .config copied from linux-image-2.6.32-5-686). It failed compiling
ptrace.c (the problem has already been described in
https://lkml.org/lkml/2012/8/9/281).
Using the patch from the linux-kernel-mailinglist from above the compile
process got further, but it fails at
gcc -nostdlib -o arch/x86/vdso/vdso32-int80.so.dbg -fPIC -shared
-Wl,--hash-style=sysv -m elf_i386 -Wl,-soname=linux-gate.so.1
-Wl,-T,arch/x86/vdso/vdso32/vdso32.lds arch/x86/vdso/vdso32/note.o
arch/x86/vdso/vdso32/int80.o
gcc: error: unrecognized command line option '-m'
gcc: error: elf_i386: No such file or directory
As I am using an i386 system anyway, I simply patched -m elf_i386 away
(which probably the Makefile when crosscompiling from amd64 to i386, see
attached patch for details). I assume -march=i386 would be a proper
replacement, but I am not sure about that.
Next problem occured at compiling an Intel network driver:
gcc -Wp,-MD,drivers/net/igbvf/.ethtool.o.d -nostdinc -isystem
/usr/lib/gcc/i486-linux-gnu/4.7/include -nostdinc -isystem
/usr/lib/gcc/i486-linux-gnu/4.7/include -Iinclude
-I/home/ceet/benedikt/vanilla-linux/linux-2.6.32.11/arch/x86/include -include
include/linux/autoconf.h -D__KERNEL__ -Wall -Wundef -Wstrict-prototypes
-Wno-trigraphs -fno-strict-aliasing -fno-common
-Werror-implicit-function-declaration -Wno-format-security
-fno-delete-null-pointer-checks -Os -m32 -msoft-float -mregparm=3
-freg-struct-return -mpreferred-stack-boundary=2 -march=i686 -mtune=generic
-Wa,-mtune=generic32 -ffreestanding -fstack-protector -DCONFIG_AS_CFI=1
-DCONFIG_AS_CFI_SIGNAL_FRAME=1 -pipe -Wno-sign-compare
-fno-asynchronous-unwind-tables -mno-sse -mno-mmx -mno-sse2 -mno-3dnow
-Wframe-larger-than=1024 -fomit-frame-pointer -Wdeclaration-after-statement
-Wno-pointer-sign -fno-strict-overflow -fno-dwarf2-cfi-asm -fconserve-stack
-DMODULE -D"KBUILD_STR(s)=#s" -D"KBUILD_BASENAME=KBUILD_STR(ethtool)"
-D"KBUILD_MODNAME=KBUILD_STR(igbvf)" -c -o drivers/net/igbvf/.tmp_ethtool.o
drivers/net/igbvf/ethtool.c
In file included from include/linux/irq.h:29:0,
from
/home/ceet/benedikt/vanilla-linux/linux-2.6.32.11/arch/x86/include/asm/hardirq.h:5,
from include/linux/hardirq.h:10,
from include/linux/interrupt.h:12,
from include/linux/netdevice.h:1070,
from drivers/net/igbvf/ethtool.c:30:
/home/ceet/benedikt/vanilla-linux/linux-2.6.32.11/arch/x86/include/asm/irq_regs.h:
In function 'set_irq_regs':
/home/ceet/benedikt/vanilla-linux/linux-2.6.32.11/arch/x86/include/asm/irq_regs.h:26:2:
warning: variable 'tmp__' set but not used [-Wunused-but-set-variable]
In file included from
/home/ceet/benedikt/vanilla-linux/linux-2.6.32.11/arch/x86/include/asm/hardirq.h:5:0,
from include/linux/hardirq.h:10,
from include/linux/interrupt.h:12,
from include/linux/netdevice.h:1070,
from drivers/net/igbvf/ethtool.c:30:
include/linux/irq.h: In function 'alloc_desc_masks':
include/linux/irq.h:441:8: warning: variable 'gfp' set but not used
[-Wunused-but-set-variable]
In file included from drivers/net/igbvf/ethtool.c:36:0:
drivers/net/igbvf/igbvf.h: At top level:
drivers/net/igbvf/igbvf.h:128:15: error: duplicate member 'page'
make[5]: *** [drivers/net/igbvf/ethtool.o] Error 1
make[4]: *** [drivers/net/igbvf] Error 2
make[3]: *** [drivers/net] Error 2
make[2]: *** [drivers] Error 2
make[1]: *** [deb-pkg] Error 2
make: *** [deb-pkg] Error 2
Of course I could find some way to go around this error, but I assume I
either did something fundamentally wrong or I'll have to file a bug
against some package (gcc?). Does anybody have an idea?
Regards,
Benedikt Wildenhain
P.S.: Compiling this kernel using gcc-4.4 from oldstable works, I am
currently trying to compile it together with the rtai-patches, but that
doesn't feel like the way rtai-source is meant to be used.
--
Benedikt Wildenhain, M.Sc., Wiss. Mitarbeiter - Hardwarenahe IT-Systeme
Hochschule Bochum - Bochum University of Applied Sciences
Campus Velbert/Heiligenhaus - http://www.hs-bochum.de/cvh/
Höseler Platz 2, Heiligenhaus, Raum 2.28, Tel +49 (0)2056 158744
--- a/arch/x86/vdso/Makefile 2013-10-22 14:14:38.0 +0200
+++ b/arch/x86/vdso/Makefile 2013-10-22 14:14:09.0 +0200
@@ -69,7 +69,7 @@
vdso32-images = $(vdso32.so-y:%=vdso32-%.so)
CPPFLAGS_vdso32.lds = $(CPPFLAGS_vdso.lds)
-VDSO_LDFLAGS_vdso32.lds = -m elf_i386 -Wl,-soname=l
