scripts/build/arch/sh.sh
author Michael Hope <michael.hope@linaro.org>
Thu Sep 29 12:40:42 2011 +1300 (2011-09-29)
changeset 2695 f2495884ca3e
parent 964 0535f7bf1069
child 2760 b402a49734a3
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 # Compute sh-specific values
     2 
     3 CT_DoArchTupleValues () {
     4     # The architecture part of the tuple:
     5     CT_TARGET_ARCH="${CT_ARCH_SH_VARIANT}${target_endian_eb}"
     6 
     7     # gcc ./configure flags
     8     CT_ARCH_WITH_ARCH=
     9     CT_ARCH_WITH_ABI=
    10     CT_ARCH_WITH_CPU=
    11     CT_ARCH_WITH_TUNE=
    12     CT_ARCH_WITH_FPU=
    13     CT_ARCH_WITH_FLOAT=
    14 
    15     # Endianness stuff
    16     case "${CT_ARCH_BE},${CT_ARCH_LE}" in
    17         y,) CT_ARCH_ENDIAN_CFLAG=-mb;;
    18         ,y) CT_ARCH_ENDIAN_CFLAG=-ml;;
    19     esac
    20 
    21     # CFLAGS
    22     case "${CT_ARCH_SH_VARIANT}" in
    23         sh3)    CT_ARCH_ARCH_CFLAG=-m3;;
    24         sh4*)
    25             case "${CT_ARCH_FLOAT_HW},${CT_ARCH_FLOAT_SW}" in
    26                 y,) CT_ARCH_ARCH_CFLAG="-m4${CT_ARCH_SH_VARIANT##sh?}";;
    27                 ,y) CT_ARCH_ARCH_CFLAG="-m4${CT_ARCH_SH_VARIANT##sh?}-nofpu";;
    28             esac
    29             ;;
    30     esac
    31     CT_ARCH_FLOAT_CFLAG=
    32 }