scripts/build/arch/arm.sh
author Michael Hope <michael.hope@linaro.org>
Thu Sep 29 12:40:42 2011 +1300 (2011-09-29)
changeset 2695 f2495884ca3e
parent 1597 fa8f3ab724f9
child 3158 1161ea79915b
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>
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# Compute ARM-specific values
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CT_DoArchTupleValues() {
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    # The architecture part of the tuple:
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    CT_TARGET_ARCH="${CT_ARCH}${target_endian_eb}"
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    # The system part of the tuple:
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    case "${CT_LIBC},${CT_ARCH_ARM_EABI}" in
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        *glibc,y)   CT_TARGET_SYS=gnueabi;;
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        uClibc,y)   CT_TARGET_SYS=uclibcgnueabi;;
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        *,y)        CT_TARGET_SYS=eabi;;
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    esac
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    # Set the default instruction set mode
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    case "${CT_ARCH_ARM_MODE}" in
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        arm)    ;;
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        thumb)
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            CT_ARCH_CC_CORE_EXTRA_CONFIG="--with-mode=thumb"
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            CT_ARCH_CC_EXTRA_CONFIG="--with-mode=thumb"
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#            CT_ARCH_TARGET_CFLAGS="-mthumb"
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            ;;
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    esac
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    if [ "${CT_ARCH_ARM_INTERWORKING}" = "y" ]; then
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        CT_ARCH_TARGET_CFLAGS+=" -mthumb-interwork"
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    fi
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}