I'm doing regular compile tests with 2.4 and 2.5 kernels to catch and
either fix or report compile errors.
Since several revisions 2.5 has the _very_ annoying behavior of showing
link errors in the wrong files. This makes finding the cause of the
problems harder.
As an example look at the following link error in 2.4.21-pre3-ac2:
<-- snip -->
...
ld -m elf_i386 -T
/home/bunk/linux/kernel-2.4/linux-2.4.20-ac/arch/i386/vmlinux.
lds -e stext arch/i386/kernel/head.o arch/i386/kernel/init_task.o
init/main.o init/version.o init/do_mounts.o \
--start-group \
arch/i386/kernel/kernel.o arch/i386/mm/mm.o kernel/kernel.o
mm/mm.o fs/fs.o ipc/ipc.o \
drivers/acpi/acpi.o drivers/parport/driver.o
drivers/char/char.o drivers/block/block.o drivers/misc/misc.o drivers/net/net.o
drivers/char/agp/agp.o drivers/char/drm/drm.o drivers/net/fc/fc.o
drivers/net/appletalk/appletalk.o drivers/net/tokenring/tr.o drivers/net/wan/wan.o
drivers/net/arcnet/arcnetdrv.o drivers/atm/atm.o drivers/ide/idedriver.o drivers/scsi/scsidrv.o
drivers/message/fusion/fusion.o drivers/ieee1394/ieee1394drv.o drivers/cdrom/driver.o
drivers/sound/sounddrivers.o drivers/pci/driver.o drivers/mtd/mtdlink.o
drivers/pcmcia/pcmcia.o
drivers/net/pcmcia/pcmcia_net.o drivers/net/wireless/wireless_net.o
drivers/char/pcmcia/pcmcia_char.o drivers/pnp/pnp.o drivers/video/video.o
drivers/block/paride/paride.a drivers/net/hamradio/hamradio.o drivers/usb/usbdrv.o
drivers/media/media.o drivers/input/inputdrv.o drivers/message/i2o/i2o.o
drivers/net/irda/irda.o drivers/i2c/i2c.o drivers/telephony/telephony.o drivers/md/mddev.o
drivers/bluetooth/bluetooth.o drivers/hotplug/vmlinux-obj.o
drivers/isdn/vmlinux-obj.o arch/i386/math-emu/math.o \
net/network.o \
/home/bunk/linux/kernel-2.4/linux-2.4.20-ac/arch/i386/lib/lib.a
/home/bunk/linux/kernel-2.4/linux-2.4.20-ac/lib/lib.a
/home/bunk/linux/kernel-2.4/linux-2.4.20-ac/arch/i386/lib/lib.a \
--end-group \
-o vmlinux
drivers/char/char.o(.text.init+0xa0bc): In function `siolx_init':
: undefined reference to `local symbols in discarded section .text.exit'
drivers/atm/atm.o(.text.init+0x21): In function `idt77252_exit':
/home/bunk/linux/kernel-2.4/linux-2.4.20-ac/drivers/atm/idt77252.c:
undefined reference to `ia_detect'
make: *** [vmlinux] Error 1
<-- snip -->
With these error messages it's easy to identify the problems.
Compare this to the following output in 2.5.55:
<-- snip -->
...
ld -m elf_i386 -e stext -T arch/i386/vmlinux.lds.s
arch/i386/kernel/head.o arch/i386/kernel/init_task.o init/built-in.o
--start-group usr/built-in.o arch/i386/kernel/built-in.o
arch/i386/mm/built-in.o arch/i386/mach-default/built-in.o
kernel/built-in.o mm/built-in.o fs/built-in.o ipc/built-in.o
security/built-in.o crypto/built-in.o lib/lib.a arch/i386/lib/lib.a
drivers/built-in.o sound/built-in.o arch/i386/math-emu/built-in.o
arch/i386/pci/built-in.o arch/i386/oprofile/built-in.o net/built-in.o
--end-group -o .tmp_vmlinux1
drivers/built-in.o(.text+0x17daa9): In function `lanai_module_init':
/home/bunk/linux/kernel-2.5/linux-2.5.55/drivers/atm/lanai.c: undefined
reference to `__udivdi3'
drivers/built-in.o(.text+0x17e6ab):/home/bunk/linux/kernel-2.5/linux-2.5.55/drivers/atm/lanai.c:
undefined reference to `__udivdi3'
drivers/built-in.o(.text+0x17f73a):/home/bunk/linux/kernel-2.5/linux-2.5.55/drivers/atm/lanai.c:
undefined reference to `__udivdi3'
drivers/built-in.o(.text+0x1810bf):/home/bunk/linux/kernel-2.5/linux-2.5.55/drivers/atm/lanai.c:
undefined reference to `__udivdi3'
drivers/built-in.o(.text+0x183125):/home/bunk/linux/kernel-2.5/linux-2.5.55/drivers/atm/lanai.c:
undefined reference to `__udivdi3'
drivers/built-in.o(.text+0x1ac9e5):/home/bunk/linux/kernel-2.5/linux-2.5.55/drivers/atm/lanai.c:
undefined reference to `awc_work'
drivers/built-in.o(.text+0x23747a):/home/bunk/linux/kernel-2.5/linux-2.5.55/drivers/atm/lanai.c:
undefined reference to `__bad_udelay'
drivers/built-in.o(.init.text+0x44c7): In function
`nicstar_module_exit':
/home/bunk/linux/kernel-2.5/linux-2.5.55/drivers/atm/nicstar.c:408:
undefined reference to `mxser_init'
drivers/built-in.o(.init.text+0x518fc): In function `lanai_module_init':
/home/bunk/linux/kernel-2.5/linux-2.5.55/drivers/atm/lanai.c: undefined
reference to `_ebss'
drivers/built-in.o(.init.text+0x51901):/home/bunk/linux/kernel-2.5/linux-2.5.55/drivers/atm/lanai.c:
undefined reference to `_ebss'
drivers/built-in.o(.init.text+0x5191b):/home/bunk/linux/kernel-2.5/linux-2.5.55/drivers/atm/lanai.c:
undefined reference to `_ebss'
drivers/built-in.o(.data+0x73154):/home/bunk/linux/kernel-2.5/linux-2.5.55/drivers/atm/lanai.c:
undefined reference to `local symbols in discarded section .exit.text'
make: *** [.tmp_vmlinux1] Error 1
<-- snip -->
The references to drivers/atm/lanai.c are complete nonsense, e.g. the
cause for the awc_work problem is in drivers/net/aironet4500* .
I'm using the gcc 2.95 and binutils 2.13.90.0.16 from Debian unstable.
cu
Adrian
--
"Is there not promise of rain?" Ling Tan asked suddenly out
of the darkness. There had been need of rain for many days.
"Only a promise," Lao Er said.
Pearl S. Buck - Dragon Seed
On Fri, 10 Jan 2003, Adrian Bunk wrote:
> I'm doing regular compile tests with 2.4 and 2.5 kernels to catch and
> either fix or report compile errors.
>
> Since several revisions 2.5 has the _very_ annoying behavior of showing
> link errors in the wrong files. This makes finding the cause of the
> problems harder.
> drivers/built-in.o(.init.text+0x51901):/home/bunk/linux/kernel-2.5/linux-2.5.55/drivers/atm/lanai.c:
> undefined reference to `_ebss'
> [...]
> I'm using the gcc 2.95 and binutils 2.13.90.0.16 from Debian unstable.
Here I get e.g.
drivers/built-in.o: In function `isdn_audio_put_dle_code':
drivers/built-in.o(.text+0xe2247): undefined reference to `save_flags'
drivers/built-in.o(.text+0xe224c): undefined reference to `cli'
drivers/built-in.o(.text+0xe226f): undefined reference to `restore_flags'
which is actually correct. My ld doesn't output the name of the file the
function was in at all, though. I'm rather sure that you're hitting a
binutils bug, possibly triggered by the use of the ld during the kernel
build, which creates multiple levels of composite objects (ld -r) before
the final link.
Maybe you updated binutils and that's when the problems started?
--Kai
On Fri, Jan 10, 2003 at 03:42:16PM -0600, Kai Germaschewski wrote:
>
> Here I get e.g.
>
> drivers/built-in.o: In function `isdn_audio_put_dle_code':
> drivers/built-in.o(.text+0xe2247): undefined reference to `save_flags'
> drivers/built-in.o(.text+0xe224c): undefined reference to `cli'
> drivers/built-in.o(.text+0xe226f): undefined reference to `restore_flags'
>
> which is actually correct. My ld doesn't output the name of the file the
> function was in at all, though. I'm rather sure that you're hitting a
> binutils bug, possibly triggered by the use of the ld during the kernel
> build, which creates multiple levels of composite objects (ld -r) before
> the final link.
>
> Maybe you updated binutils and that's when the problems started?
It might be a bug in binutils but if it's a bug in binutils it's only
triggered in 2.5. I've seen it in 2.5 for several weeks now and the 2.4
and 2.5 examples I sent in my initial mail were both from today's
compilations and there was definitely no package upgrade on my system
between them.
I've attached the .config that triggered it in 2.5.55.
> --Kai
cu
Adrian
--
"Is there not promise of rain?" Ling Tan asked suddenly out
of the darkness. There had been need of rain for many days.
"Only a promise," Lao Er said.
Pearl S. Buck - Dragon Seed