chiark - git - mdw - mdw-cross/blob - bin/mdw-cross

   1 #! /bin/sh -e
   2
   3 case $# in
   4   0) echo 2>&1 "usage: ${0##*/} ENV [CMD [ARGS ...]]"; exit 2 ;;
   5 esac
   6 env=$1; shift
   7 case $# in
   8   0) set -- "$SHELL" ;;
   9 esac
  10
  11 case ${CROSSDIR+t} in
  12   t) ;;
  13   *)
  14     dir=$(pwd)
  15     p=$0
  16     while :; do
  17       case $p in */*) f=${p##*/} p=${p%/*};; *) f=$p p=. ;; esac
  18       cd $p
  19       if ! [ -L "$f" ]; then break; fi
  20       p=$(readlink "$f")
  21     done
  22     p=$(pwd)
  23     CROSSDIR=${p%/bin}; export CROSSDIR
  24     cd "$dir"
  25     ;;
  26 esac
  27
  28 if ! [ -f "$CROSSDIR/etc/$env-setup.sh" ]; then
  29   echo 2>&1 "${0##*/}: cross environment \`$env' unknown"; exit 2
  30 fi
  31
  32 MDW_BUILDENV=$env; export MDW_BUILDENV
  33 if [ -f "$CROSSDIR/etc/$env-config.site" ]; then
  34   CONFIG_SITE=$CROSSDIR/etc/$env-config.site; export CONFIG_SITE
  35 fi
  36 CROSS_PREFIX=$CROSSDIR/inst.$env; export CROSS_PREFIX
  37 . "$CROSSDIR/etc/$env-setup.sh"
  38 exec "$@"