chiark - git - mdw - mdw-cross/blob - src/cross.in

   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 : ${CROSSDIR=@crossdir@}; export CROSSDIR
  12
  13 if ! [ -f "$CROSSDIR/etc/$env-setup.sh" ]; then
  14   echo 2>&1 "${0##*/}: cross environment \`$env' unknown"; exit 2
  15 fi
  16
  17 if type >/dev/null 2>&1; then CROSS_COMPILER_PREFIX="ccache "
  18 else CROSS_COMPILER_PREFIX=
  19 fi
  20 export CROSS_COMPILER_PREFIX
  21
  22 CROSS_BUILDENV=$env; export CROSS_BUILDENV
  23
  24 if [ -f "$CROSSDIR/etc/$env-config.site" ]
  25 then CONFIG_SITE=$CROSSDIR/etc/$env-config.site
  26 else CONFIG_SITE=$CROSSDIR/etc/common-cross-config.site
  27 fi
  28 export CONFIG_SITE
  29
  30 CROSS_PREFIX=$CROSSDIR/inst.$env; export CROSS_PREFIX
  31 . "$CROSSDIR/etc/$env-setup.sh"
  32
  33 case ${CROSS_ARCH+t} in
  34   t) ;;
  35   *) echo 2>&1 "${0##*/}: setup script didn't set \`CROSS_ARCH'"; exit 2 ;;
  36 esac
  37 export CROSS_ARCH
  38
  39 case :$PATH: in
  40   *:"$CROSSDIR/tools:"*) ;;
  41   *) PATH=$CROSSDIR/tools:$PATH ;;
  42 esac
  43
  44 case ${CROSS_NATIVE_P-nil} in
  45   t) gcc=gcc clang=clang ;;
  46   nil) gcc=$CROSS_ARCH-gcc clang=${CROSS_clang_TOOL-clang} ;;
  47 esac
  48 if type >/dev/null 2>&1 "$gcc"; then found_gcc=t; else found_gcc=nil; fi
  49 if type >/dev/null 2>&1 "$clang"; then found_clang=t; else found_clang=nil; fi
  50 case ${CROSS_COMPILER-guess},$found_gcc,$found_clang in
  51   guess,t,* | prefer-gcc,t,* | gcc,t,* | prefer-clang,t,nil)
  52     CROSS_COMPILER=gcc ;;
  53   guess,nil,t | prefer-clang,*,t | clang,*,t | prefer-gcc,nil,t)
  54     CROSS_COMPILER=clang ;;
  55   guess,* | prefer-gcc,* | prefer-clang,*)
  56     echo 2>&1 "${0##*/}: couldn't find C compiler \`$gcc' or \`$clang'"
  57     exit 2
  58     ;;
  59   gcc,*) echo 2>&1 "${0##*/}: couldn't find C compiler \`$gcc'"; exit 2 ;;
  60   clang,*) echo 2>&1 "${0##*/}: couldn't find C compiler \`$clang'"; exit 2 ;;
  61   *)
  62     echo 2>&1 "${0##*/}: unrecognized preferred compiler \`$CROSS_COMPILER'"
  63     exit 2
  64     ;;
  65 esac
  66 export CROSS_COMPILER
  67
  68 exec "$@"