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From Bugzilla Helper: User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.4) Gecko/20030612 Description of problem: installed kernel source cp configs/kernel-2.4.21-athlon.config .config make oldconfig make menuconfig -> turned on "enable APIC support on single processor" and "IO APIC" make dep make bzImage -> got compile error: arch/i386/kernel/kernel.o(.text+0x404b): In function 'enable_irq': undefined reference to 'send_IPI_self' Version-Release number of selected component (if applicable): kernel-2.4.21-4.0.2.EL How reproducible: Always Steps to Reproduce: 1.see steps above 2. 3. Actual Results: link error Expected Results: successful compile Additional info:
There is a reason we don't enable this config option: it is broken on a LOT of machines and even when it's not, it only provides very very marginal gain if any at all. Self compiled kernels aren't supported; in addition we cannot make every possible combination of kernel options work. You also forgot to do "make mrproper" as very first step, and occasionally you need a make oldconfig after make menuconfig.