Thanks for the information, Bruce. I removed all kernel configuration fragments from the bb file but difference between defconfig and .config is huge. I may do something wrong and will study more.
Chungyeh 2015-03-09 21:02 GMT+08:00 Bruce Ashfield <bruce.ashfi...@windriver.com>: > On 15-03-09 04:36 AM, Chung-Yeh Wang wrote: > >> Hi List, >> >> I am using Yocto 1.7.1 to build linux-mainline. I found defconfig will >> not be used when using linux-yocto-custom.bb >> <http://linux-yocto-custom.bb/> (maybe also happens on linux-yocto). >> >> I think below is the reason, >> >> 1. kernel_do_configure is run after do_kernel_configme.The last line of >> do_kernel_configme is echo >> "CONFIG_LOCALVERSION="\"${LINUX_VERSION_EXTENSION}\" >> ${B}/.config >> >> 2. Following are the code to use defconfig, >> > > The linux-yocto kernel_configme task takes the defconfig into account, > and uses it along with kernel configuration fragment processing. > > The skipping of the blind defconfig copy is completely intentional. > > Cheers, > > Bruce > > > >> # Copy defconfig to .config if .config does not exist. This allows >> # recipes to manage the .config themselves in do_configure_prepend(). >> if [ -f "${WORKDIR}/defconfig" ] && [ ! -f "${B}/.config" ]; then >> cp "${WORKDIR}/defconfig" "${B}/.config" >> >> The condition '[ ! -f "${B}/.config"]' will not be true, so >> recepe-kernel/linux/linux-yocto-custom/defconfig will nerver be used. >> >> >> To use defconfig is one of the method suggested in Kernel developer >> manual. >> >> Thanks and Regards, >> Chungyeh >> >> >> >
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