Date: Fri, 22 Jun 2012 21:11:04 -0700 From: Tim Kientzle <kientzle@freebsd.org> To: arm@freebsd.org Subject: armv6 tree vs. buildkernel Message-ID: <3F1A5B5F-0787-41CE-8C77-8B1F9A601172@freebsd.org>
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On the BeagleBone, running a very recent armv6 tree:
# make TARGET_CPUTYPE=3Darmv6 buildworld
# make TARGET_CPUTYPE=3Darmv6 KERNCONF=3DBEAGLEBONE buildkernel
=85.
--------------------------------------------------------------
>>> stage 3.2: building everything
--------------------------------------------------------------
cd /usr/obj/usr/src/sys/BEAGLEBONE; MAKEOBJDIRPREFIX=3D/usr/obj =
MACHINE_ARCH=3Darm MACHINE=3Darm CPUTYPE=3Darmv6 =
GROFF_BIN_PATH=3D/usr/obj/usr/src/tmp/legacy/usr/bin =
GROFF_FONT_PATH=3D/usr/obj/usr/src/tmp/legacy/usr/share/groff_font =
GROFF_TMAC_PATH=3D/usr/obj/usr/src/tmp/legacy/usr/share/tmac =
_SHLIBDIRPREFIX=3D/usr/obj/usr/src/tmp VERSION=3D"FreeBSD 10.0-CURRENT =
arm 1000011" INSTALL=3D"sh /usr/src/tools/install.sh" =
PATH=3D/usr/obj/usr/src/tmp/legacy/usr/sbin:/usr/obj/usr/src/tmp/legacy/us=
r/bin:/usr/obj/usr/src/tmp/legacy/usr/games:/usr/obj/usr/src/tmp/usr/sbin:=
/usr/obj/usr/src/tmp/usr/bin:/usr/obj/usr/src/tmp/usr/games:/sbin:/bin:/us=
r/sbin:/usr/bin make KERNEL=3Dkernel all -DNO_MODULES_OBJ
cc -mlittle-endian -c -x assembler-with-cpp -DLOCORE -O -pipe =
-march=3Darmv6 -DARM_ARCH_6=3D1 -std=3Dc99 -g -Wall -Wredundant-decls =
-Wnested-externs -Wstrict-prototypes -Wmissing-prototypes =
-Wpointer-arith -Winline -Wcast-qual -Wundef -Wno-pointer-sign =
-fformat-extensions -Wmissing-include-dirs -fdiagnostics-show-option =
-nostdinc -I. -I/usr/src/sys -I/usr/src/sys/contrib/altq =
-I/usr/src/sys/contrib/libfdt -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS =
-include opt_global.h -fno-common -finline-limit=3D8000 --param =
inline-unit-growth=3D100 --param large-function-growth=3D1000 =
-D_ARM_ARCH_6 -ffreestanding -Werror /usr/src/sys/arm/arm/locore.S
In file included from /usr/src/sys/arm/arm/locore.S:38:
./machine/asm.h:139:1: error: "_ARM_ARCH_6" redefined
<command-line>: error: this is the location of the previous definition
One solution to this seems to be to edit sys/arm/include/asm.h to =
properly redefine these symbols, e.g.,
#if defined(_ARM_ARCH_7) || defined (__ARM_ARCH_6__) || \
defined (__ARM_ARCH_6J__)
+ #undef _ARM_ARCH_6
#define _ARM_ARCH_6
#endif
After this change, it gets as far as:
cc -mlittle-endian -c -O -pipe -march=3Darmv6 -DARM_ARCH_6=3D1 -std=3Dc99 =
-g -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes =
-Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual -Wundef =
-Wno-pointer-sign -fformat-extensions -Wmissing-include-dirs =
-fdiagnostics-show-option -nostdinc -I. -I/usr/src/sys =
-I/usr/src/sys/contrib/altq -I/usr/src/sys/contrib/libfdt -D_KERNEL =
-DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h -fno-common =
-finline-limit=3D8000 --param inline-unit-growth=3D100 --param =
large-function-growth=3D1000 -D_ARM_ARCH_6 -ffreestanding -Werror =
/usr/src/sys/kern/kern_clock.c
{standard input}: Assembler messages:
{standard input}:1363: Error: selected processor does not support `dmb'
{standard input}:1382: Error: selected processor does not support `dmb'
*** [kern_clock.o] Error code 1
This seems to be due to some mismatch between sys/arm/include/atomic.h =
(which is getting ARM_ARCH_7A from somewhere?) and the -march setting. =
I hope to track down the details this weekend.
Tim
P.S. How is CPUTYPE/TARGET_CPUTYPE supposed to be inferred for regular =
"buildworld"?
The only option I can find is to set it explicitly in /etc/src.conf.=
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