scripts/build/arch/x86.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 2759 d063b1ae8c1b
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 x86-specific values
     2 
     3 # This one really needs a little love! :-(
     4 
     5 CT_DoArchTupleValues() {
     6 
     7     # Override the architecture part of the tuple:
     8     if [ "${CT_ARCH_64}" = "y" ]; then
     9         CT_TARGET_ARCH=x86_64
    10     else
    11         arch="${CT_ARCH_ARCH}"
    12         [ -z "${arch}" ] && arch="${CT_ARCH_TUNE}"
    13         case "${arch}" in
    14             "")                           CT_TARGET_ARCH=i386;;
    15             i386|i486|i586|i686)          CT_TARGET_ARCH="${arch}";;
    16             winchip*)                     CT_TARGET_ARCH=i486;;
    17             pentium|pentium-mmx|c3*)      CT_TARGET_ARCH=i586;;
    18             pentiumpro|pentium*|athlon*)  CT_TARGET_ARCH=i686;;
    19             *)                            CT_TARGET_ARCH=i586;;
    20         esac
    21     fi
    22 }