On Fri, Oct 30, 2015 at 8:30 PM, Richard Weinberger
<richard.weinber...@gmail.com> wrote:
> On Fri, Oct 30, 2015 at 5:02 PM, Balaco Baco <balacob...@imap.cc> wrote:
>> I restarted, now I've got another kernel source (2.6.32.68), knowing
>> that it may be old, but it's the "newer old" for 2.6, and I hoped that
>> it would work.
>
> Are you an archeologist? ;-)
> Is there a particular reason why you can't use something recent?
>
>> Steps done:
>>
>> 1. downloaded https://cdn. kernel
>> .org/pub/linux/kernel/v2.6/longterm/v2.6.32/linux-2.6.32.68.tar.xz
>> 2. extract with tar cJf (whatever)
>> 3. A few commands:
>> make defconfig ARCH=um
>> # config is saved on a file, to be restarted from a known point
>> whenever needed
>> make menuconfig ARCH=um
>> make mrproper # zero start guarantee when
>> repeating these steps
>> make mrproper ARCH=um # "
>> make ARCH=uml
>>
>> 4. It stops a few seconds after, with a few errors that may be simple to
>> fix:
>>
>> ===============
>> arch/um/os-Linux/start_up.c: In function 'check_coredump_limit':
>> arch/um/os-Linux/start_up.c:340:16: error: storage size of 'lim' isn't
>> known
>> struct rlimit lim;
>> ^
>> arch/um/os-Linux/start_up.c:341:2: error: implicit declaration of
>> function 'getrlimit' [-Werror=implicit-function-declaration]
>> int err = getrlimit(RLIMIT_CORE, &lim);
>> ^
>> arch/um/os-Linux/start_up.c:341:22: error: 'RLIMIT_CORE' undeclared
>> (first use in this function)
>> int err = getrlimit(RLIMIT_CORE, &lim);
>> ^
>> arch/um/os-Linux/start_up.c:341:22: note: each undeclared identifier is
>> reported only once for each function it appears in
>> arch/um/os-Linux/start_up.c:349:22: error: 'RLIM_INFINITY' undeclared
>> (first use in this function)
>> if (lim.rlim_cur == RLIM_INFINITY)
>> ^
>> arch/um/os-Linux/start_up.c:340:16: warning: unused variable 'lim'
>> [-Wunused-variable]
>> struct rlimit lim;
>> ^
>> cc1: some warnings being treated as errors
>> make[1]: *** [arch/um/os-Linux/start_up.o] Error 1
>> make: *** [arch/um/os-Linux] Error 2
>>
>> ===============
>>
>> Do you know the reason for these two errors? And how I should fix them?
>
> It depends what libc you're using. AFAICT libc moved a header file to
> a new location.
Can you please verify whether this commit fixes the issue?
commit fdfa4c952844fce881df8c76de9c7180cbe913ab
Author: Sergei Trofimovich <sly...@gentoo.org>
Date: Sun Dec 30 01:37:30 2012 +0300
um: add missing declaration of 'getrlimit()' and friends
If so, we only need to figure why it wasn't backported.
--
Thanks,
//richard
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