config/kernel/linux.in.2
author Michael Hope <michael.hope@linaro.org>
Thu Sep 29 12:40:42 2011 +1300 (2011-09-29)
changeset 2695 f2495884ca3e
parent 2446 d902cd77419f
permissions -rw-r--r--
config: add a 'auto' value for the number of parallel jobs

When CT_PARALLEL_JOBS is -1, set the number of parallel jobs to the
number of online CPUs + 1. Update documentation to match.

I find this useful when building in the cloud. You can use the same
.config file and have the build adapt to the number of processors
available. Limited testing shows that NCPUS+1 is faster than NCPUS+0
or NCPUS+2.

Signed-off-by: Michael Hope <michael.hope@linaro.org>
     1 # Linux kernel options
     2 
     3 if ! KERNEL_LINUX_USE_CUSTOM_HEADERS
     4 
     5 choice
     6     bool
     7     prompt "Kernel verbosity:"
     8     default KERNEL_LINUX_VERBOSITY_0
     9 
    10 config KERNEL_LINUX_VERBOSITY_0
    11     bool
    12     prompt "Simplified"
    13     help
    14       Print simplified command lines.
    15 
    16 config KERNEL_LINUX_VERBOSITY_1
    17     bool
    18     prompt "Full commands"
    19     help
    20       Print full command lines.
    21 
    22 config KERNEL_LINUX_VERBOSITY_2
    23     bool
    24     prompt "Exec reasons"
    25     help
    26       Print the reasons why a make target is rebuild.
    27 
    28 endchoice
    29 
    30 config KERNEL_LINUX_VERBOSE_LEVEL
    31     int
    32     default 0 if KERNEL_LINUX_VERBOSITY_0
    33     default 1 if KERNEL_LINUX_VERBOSITY_1
    34     default 2 if KERNEL_LINUX_VERBOSITY_2
    35 
    36 config KERNEL_LINUX_INSTALL_CHECK
    37     bool
    38     prompt "Check installed headers"
    39     default y
    40     help
    41       If you are in doubt that installed headers are buggy, say 'Y'
    42       here to have an extra check passed onto the headers.
    43 
    44 endif # ! KERNEL_LINUX_USE_CUSTOM_HEADERS