gcc seems to ignore flags in make vmlinux (was: Kernel compile aborts in make bzImage)

[Aurel Wisse]

Sorry for coming back with this one, but if I don't
solve it, there will be no networking with YDL 2.2 for
me.

I followed Gary's advice and looked up a few
dependencies with grep, in the Makefiles and in the
sources
. 
To recall, the "make vmlinux" output contains, after
all the object files are compiled and linked and hence
"global linking" should start,

init/main.o: in function 'do_basic_setup' ...
undefined reference to 'init_pcmcia_ds'

Looking up this line in main.c, it says in order to
compile this call, the flag CONFIG_PCMCIA has to be
set. Looking this up in .config shows me that the flag
*was not* set.

Same thing with the second unresolved conflict:
"set_backlight_enable" in kernel.o (called in
traps.c). When the flag "CONFIG_PMAC_BACKLIGHT" is not
set, the function call shouldn't be compiled and hence
not cause a dependency. I can assert that this flag
doesn't even appear in  the .config file.

What do I try from here? Could it be the compiler
(gcc-2.95.4)? 

Well, it's probably I, but I need a little push to get
over this bump.

Thanks for additional advice. 

Aurel

> grep -r sk_attach_filter *
> 
> which returned the following
> 
> core/filter.c: *        sk_attach_filter - attach a
> socket filter
> core/filter.c:int sk_attach_filter(struct sock_fprog
> *fprog, struct sock
> *sk)
> core/sock.c:                            ret =
> sk_attach_filter(&fprog, sk);
> Binary file core/sock.o matches
> Binary file core/filter.o matches
> Binary file core/core.o matches
> Binary file network.o matches
> 
> then I went into the core subdirectory and looked at
> Makefile to see what
> includes
> filter.o,  the file which would define that routine
> and see:
> 
> obj-$(CONFIG_FILTER) += filter.o
> 
>  meaning that if CONFIG_FILTER is set, then filter.o
> will get included in
> the link.
> 
> So, now you would do make menuconfig or make xconfig
> and set CONFIG_FILTER.
> 
> It may be helpful to also look in the
> directory tree working backwards from core to find a
> Config.in which
> contains CONFIG_FILTER, as it will tell you the text
> to look for in
> configuring
> that parameter.  In this case it's
> /usr/src/linux/net/Config.in and the
> line is
> 
> bool 'Socket Filtering'  CONFIG_FILTER
> 
> Thus in "make menuconfig", when you enable Socket
> Filtering, you will
> get filter.o included and your undefined for
> sk_attach_filter will go away.
> 
> The problem is that sometimes the kernel has
> dependencies which
> are not all protected and these "mismatches" occur.
> 
> Good Luck!
> 
> Gary Hannon
> CSPI
> 
> 
> 
> 
> 
> 
> 
> 
> Aurel Wisse <aurel_wisse@yahoo.com> on 04/18/2002
> 08:11:21 PM
> 
> Please respond to
> yellowdog-general@lists.terrasoftsolutions.com
> 
> To:   yellowdog-general@lists.terrasoftsolutions.com
> cc:    (bcc: Gary Hannon/CSP)
> Subject:  Re: Kernel compile aborts in make bzImage
> 
> 
> 
> 
> Not solved. After reinstalling the kernel sources
> and
> using make vmlinux, the compile now hangs
> systematically with several lines of the form:
> In function 'sock_setsockopt'
> net/network.o(...stuff...): undefined reference to
> ....
> sk_attach_filter
> kmap_high
> kunmap_high
> 
> and several more functions and undefined references.
> 
> 
> Looks like a linker error. How come? What could I
> reinstall/correct to resolve these?
> 
> 
> 
> --- hanai@koto.kpu-m.ac.jp wrote:
> > From: Aurel Wisse <aurel_wisse@yahoo.com>
> > > Running YDL 2.2 in KDE on an iMac Rev. B/160MB
> > RAM.
> >
> > > I am configuring in the Linux Kernel
> Configurator,
> > > putting the .config file in /usr/src/Linux and
> run
> > > make dep, make clean and then make bzImage.
> >
> > "make bzImage" does not work in ppc. use "make
> > vmlinux"
> > (or just "make").
> >
> > HTH,
> > kaz
> > _______________________________________________
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> >
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