multiple definition of __udivsi3 when using divide operation on unsigned long numbers

Hi,

I am trying to compile uboot 1.3.1 for arm926ejs processor. i am using CodeSourcery arm-none-linux-gnueabi toolchain (gcc version 4.2.1 (CodeSourcery Sourcery G++ Lite 2007q3-51)) .

i am trying to write a driver for our on board mmc controller. i need to do multiply and divide operation as below.

unsigned long long c;
static int lc69_mmci_clk = 0;
unsigned int timeout_ns;

<snip>
<snip>
<snip>

c = (unsigned long long)timeout_ns * lc69_mmci_clk; c = c / 1000000000UL;

<snip>
<snip>

while compilling i am getting an error as below.

                cd /home/guru/project/u_boot/Ubuild &&

arm-none-linux-gnueabi-ld -Bstatic -T /home/guru/project/u_boot/u-boot/board/kboard/u-boot.lds -Ttext 0x200000 $UNDEF_SYM cpu/arm926ejs/start.o \
--start-group lib_generic/libgeneric.a
board/kboard/libkboard.a cpu/arm926ejs/libarm926ejs.a lib_arm/libarm.a fs/cramfs/libcramfs.a fs/fat/libfat.a fs/fdos/libfdos.a fs/jffs2/libjffs2.a fs/reiserfs/libreiserfs.a fs/ext2/libext2fs.a net/libnet.a disk/libdisk.a drivers/bios_emulator/libatibiosemu.a drivers/block/libblock.a drivers/hwmon/libhwmon.a drivers/i2c/libi2c.a drivers/input/libinput.a drivers/misc/libmisc.a drivers/mtd/libmtd.a drivers/mtd/nand/libnand.a drivers/mtd/nand_legacy/libnand_legacy.a drivers/mtd/onenand/libonenand.a drivers/net/libnet.a drivers/net/sk98lin/libsk98lin.a drivers/pci/libpci.a drivers/pcmcia/libpcmcia.a drivers/rtc/librtc.a drivers/serial/libserial.a drivers/usb/libusb.a drivers/video/libvideo.a post/libpost.a post/drivers/libpostdrivers.a common/libcommon.a libfdt/libfdt.a --end-group -L /home/guru/project/original/arm-2007q3/bin/../lib/gcc/arm-none-linux-gnu eabi/4.2.1 -lgcc \
-Map u-boot.map -o u-boot
/home/guru/project/original/arm-2007q3/bin/../lib/gcc/arm-none-linux-gnu eabi/4.2.1/libgcc.a(_udivsi3.o): In function `__aeabi_uidiv':
(.text+0x0): multiple definition of `__udivsi3' lib_arm/libarm.a(_udivsi3.o):/home/guru/project/u_boot/u-boot/lib_arm/_u divsi3.S:17: first defined here
arm-none-linux-gnueabi-ld: ERROR: Source object /home/guru/project/original/arm-2007q3/bin/../lib/gcc/arm-none-linux-gnu eabi/4.2.1/libgcc.a(_udivdi3.o) has EABI version 5, but target u-boot has EABI version 0
arm-none-linux-gnueabi-ld: failed to merge target specific data of file /home/guru/project/original/arm-2007q3/bin/../lib/gcc/arm-none-linux-gnu eabi/4.2.1/libgcc.a(_udivdi3.o)
arm-none-linux-gnueabi-ld: ERROR: Source object /home/guru/project/original/arm-2007q3/bin/../lib/gcc/arm-none-linux-gnu eabi/4.2.1/libgcc.a(_udivsi3.o) has EABI version 5, but target u-boot has EABI version 0
arm-none-linux-gnueabi-ld: failed to merge target specific data of file /home/guru/project/original/arm-2007q3/bin/../lib/gcc/arm-none-linux-gnu eabi/4.2.1/libgcc.a(_udivsi3.o)
arm-none-linux-gnueabi-ld: ERROR: Source object /home/guru/project/original/arm-2007q3/bin/../lib/gcc/arm-none-linux-gnu eabi/4.2.1/libgcc.a(_clz.o) has EABI version 5, but target u-boot has EABI version 0
arm-none-linux-gnueabi-ld: failed to merge target specific data of file /home/guru/project/original/arm-2007q3/bin/../lib/gcc/arm-none-linux-gnu eabi/4.2.1/libgcc.a(_clz.o) /home/guru/project/original/arm-2007q3/bin/../lib/gcc/arm-none-linux-gnu eabi/4.2.1/libgcc.a(_udivdi3.o):(.ARM.exidx+0x0): undefined reference to `__aeabi_unwind_cpp_pr0'
make: *** [/home/guru/project/u_boot/Ubuild/u-boot] Error 1

when i checked on the internet for this error few
(http://bugzilla.openmoko.org/cgi-bin/bugzilla/attachment.cgi?id=7&actio
n=view) recommended about removing -mabi from config script.

-PLATFORM_CPPFLAGS +=$(call cc-option,-mapcs-32,-mabi=apcs-gnu) +PLATFORM_CPPFLAGS +=$(call cc-option)
PLATFORM_RELFLAGS +=$(call cc-option,-mshort-load-bytes,$(call
cc-option,-malignment-traps,))

when i try this, i get a different error.

                cd /home/guru/project/u_boot/Ubuild &&

arm-none-linux-gnueabi-ld -Bstatic -T /home/guru/project/u_boot/u-boot/board/kboard/u-boot.lds -Ttext 0x200000 $UNDEF_SYM cpu/arm926ejs/start.o \
--start-group lib_generic/libgeneric.a
board/kboard/libkboard.a cpu/arm926ejs/libarm926ejs.a lib_arm/libarm.a fs/cramfs/libcramfs.a fs/fat/libfat.a fs/fdos/libfdos.a fs/jffs2/libjffs2.a fs/reiserfs/libreiserfs.a fs/ext2/libext2fs.a net/libnet.a disk/libdisk.a drivers/bios_emulator/libatibiosemu.a drivers/block/libblock.a drivers/hwmon/libhwmon.a drivers/i2c/libi2c.a drivers/input/libinput.a drivers/misc/libmisc.a drivers/mtd/libmtd.a drivers/mtd/nand/libnand.a drivers/mtd/nand_legacy/libnand_legacy.a drivers/mtd/onenand/libonenand.a drivers/net/libnet.a drivers/net/sk98lin/libsk98lin.a drivers/pci/libpci.a drivers/pcmcia/libpcmcia.a drivers/rtc/librtc.a drivers/serial/libserial.a drivers/usb/libusb.a drivers/video/libvideo.a post/libpost.a post/drivers/libpostdrivers.a common/libcommon.a libfdt/libfdt.a --end-group -L /home/guru/project/original/arm-2007q3/bin/../lib/gcc/arm-none-linux-gnu eabi/4.2.1 -lgcc \
-Map u-boot.map -o u-boot
/home/guru/project/original/arm-2007q3/bin/../lib/gcc/arm-none-linux-gnu eabi/4.2.1/libgcc.a(_dvmd_lnx.o): In function `__div0':
(.text+0x8): undefined reference to raise' /home/guru/project/original/arm-2007q3/bin/../lib/gcc/arm-none-linux-gnu eabi/4.2.1/libgcc.a(_divdi3.o):(.ARM.exidx+0x0): undefined reference to __aeabi_unwind_cpp_pr0' /home/guru/project/original/arm-2007q3/bin/../lib/gcc/arm-none-linux-gnu eabi/4.2.1/libgcc.a(_udivdi3.o):(.ARM.exidx+0x0): undefined reference to `__aeabi_unwind_cpp_pr0'
make: *** [/home/guru/project/u_boot/Ubuild/u-boot] Error 1

Does anyone has a better solution for this.

Thanks in advance

Regards
Gururaja

Don't do this. Compiler/Linker then tries to use math from libraries coming with your tool chain. Normally, U-Boot should be completely independent of any external libraries.

Option is to modify your code that compiler/linker doesn't need external libraries:

- Try to use shift operation instead of div. E.g. "c = c >> x"

- If this doesn't work, have a look to U-Boot's lib_arm directory and use only math available there. E.g (nand_util.c): do_div(n, opts->length);

Cheers

Dirk

Hi Dirk,

Thanks for the information. i looked at he nand_util.c and used the same do_div in my code and was able to compile without any issues.

Regards
Gururaja

coming with your tool chain. Normally, U-Boot should be completely independent of any external libraries.

external libraries:

use only math available there. E.g (nand_util.c): do_div(n, opts->length);