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    Subject2.5.1 - error compiling ksyms.c

    I can't 2.5.1 for a single processor environment. The compilation of
    kernel/ksyms.c fails as follows:

    gcc -D__KERNEL__ -I/usr/src/linux-2.5.1/include -Wall -Wstrict-prototypes
    -Wno-trigraphs -O2 -fomit-frame-pointer -fno-strict-aliasing -fno-common
    -pipe -mpreferred-stack-boundary=2 -march=i686 -DEXPORT_SYMTAB -c ksyms.c
    In file included from ksyms.c:24:
    /usr/src/linux-2.5.1/include/linux/kernel_stat.h: In function `kstat_irqs':
    /usr/src/linux-2.5.1/include/linux/kernel_stat.h:48: `smp_num_cpus'
    undeclared (first use in this function)
    /usr/src/linux-2.5.1/include/linux/kernel_stat.h:48: (Each undeclared
    identifier is reported only once
    /usr/src/linux-2.5.1/include/linux/kernel_stat.h:48: for each function it
    appears in.)
    make[2]: *** [ksyms.o] Error 1

    In linux-2.5.1/.config, I have:

    # CONFIG_SMP is not set

    This causes linux-2.5.1/include/linux/smp.h to define the symbol using:

    #define smp_num_cpus 1

    However in linux-2.5.1/include/linux/modules/i386_ksyms.ver is:

    #define smp_num_cpus _set_ver(smp_num_cpus)

    which seems to undefine the symbol.

    What the heck is going on here?


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