How to resolve this error while compiling linux kernel

Question

I am trying to compile Linux kernel source 2.6.38.4 on my Ubuntu machine but after almost one hour of process getting below given error

    VDSOSYM arch/x86/vdso/vdso32-int80-syms.lds
    VDSOSYM arch/x86/vdso/vdso32-sysenter-syms.lds
    VDSOSYM arch/x86/vdso/vdso32-syms.lds
     LD      arch/x86/vdso/built-in.o
     LD      arch/x86/built-in.o
     LD      vmlinux.o
     MODPOST vmlinux.o
     WARNING: modpost: Found 7 section mismatch(es).
     To see full details build your kernel with:
     'make CONFIG_DEBUG_SECTION_MISMATCH=y'
      GEN     .version
      CHK     include/generated/compile.h
      UPD     include/generated/compile.h
      CC      init/version.o
      LD      init/built-in.o
      LD      .tmp_vmlinux1
      arch/x86/built-in.o: In function `xen_hvm_post_suspend':
      /home/amit/Linux_Kernel_Study/linux-2.6.38.4/arch/x86/xen/suspend.c:34:   undefined   reference to `xen_unplug_emulated_devices'
      make: *** [.tmp_vmlinux1] Error 1

I tried to look it on to google but could not find much clue there,Can anybody let me know what should I do to resolve this issue.

Federico · Accepted Answer · 2013-03-19 17:21:32Z

1

One hour to compile the kernel is strange (Or you are compiling on old hardware). Try to use the -j option while compiling:

make -j8

It runs multiple processes to compile your sources.

Back to your question. Probably you are missing something in your kernel configuration. Use make xconfig and look for xen options. If you do not need Xen, just remove all xen-things from configuration (this will also save time during compilation)

edited Mar 19, 2013 at 17:21

answered Mar 19, 2013 at 16:41

Federico

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1 Comment

Amit Singh Tomar Over a year ago

Thanks Federico, will try it out.

matthias.bgg · Accepted Answer · 2013-03-20 11:16:10Z

0

This is a linker error. The function xen_hvm_post_suspend calls xen_unplug_emulated_devices but the linker does not find it in an object file.

Try to find out where this functions are defined, maybe your config does not include all the options necessary. If possible use 2.6.38.8 kernel, maybe the bug is fixed there. Anyway why don't you use a newer kernel version?

answered Mar 20, 2013 at 11:16

matthias.bgg

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