LinuxQuestions.org - [SOLVED] Failing to build an older kernel on a newer system.

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Failing to build an older kernel on a newer system.

kernel version: 2.6.35.14

I am able to build the kernel on one of my machines here are some specs on that machine:

Ubuntu: v14.04.5
Perl: v5.18.2
GCC: v4.8.4

When I go to build this same kernel on a machine with the following specs:

Ubuntu: v16.04.5
Perl: v5.22.1
GCC: v8.1.0

The build errors:

Code:

    make -f scripts/Makefile.build obj=fs

    make -f scripts/Makefile.build obj=ipc

      perl kernel/timeconst.pl 100 > kernel/timeconst.h

    Can't use 'defined(@array)' (Maybe you should just omit the defined()?) at kernel/timeconst.pl line 373.

    /home/rob/sandbox/branches/CODEC-branch/Platform/kernel-2.6.35.14/kernel/Makefile:138: recipe for target 'kernel/timeconst.h' failed

    make[1]: *** [kernel/timeconst.h] Error 255

    Makefile:892: recipe for target 'kernel' failed

    make: *** [kernel] Error 2

    make: *** Waiting for unfinished jobs....

    make -f scripts/Makefile.build obj=fs/devpts

    make -f scripts/Makefile.build obj=fs/ext2

I tried downloading perlbrew and building with v5.18.2 while using GCC v4.8.4 and I got the exact same error. So if the version of gcc I am using and version of Perl I am using isn't the problem then what might be the problem?

Snipit starting @ line 373:

Code:

@val = @{$canned_values{$hz}};

        if (!defined(@val)) {

                @val = compute_values($hz);

        }

        output($hz, @val);

I would omit the defined but I dont know what its there for.

Note: bc is already installed

The toolchain is: GCC; Kernel headers (installed in /usr/include); libc (Glibc).

There have been meaningful changes to kernel headers since 2.6, probably what the error 2 was about.
You're on your own with error 255 :-o.

Quote:

Originally Posted by business_kid (Post 5935984)

Yes, really wish Linux would cross-check their kernel updates to be sure the old versions can at least compile inside of the new ones.

255 is a perl file issue.

Quote:

Originally Posted by jefro (Post 5936021)

255 is a perl file issue.

Yeah based on what I have seen the only way to deal with it is to drop back to Ubuntu 14x. I am going to go ahead and close this thread.

Quote:

Yes, really wish Linux would cross-check their kernel updates to be sure the old versions can at least compile inside of the new ones.

I don't stay abreast of kernel stuff, but there was a reorganisation of header directories and a dropping of kernel firmware that I noticed. The headers are usually fairly forgiving, although my latest set spout logspam of warnings. The kernel firmware dropped as 'defunct' stuff that WASN'T defunct but lying around.