kernel/configure

   1 #!/bin/bash
   2
   3 kernelsourcedir=
   4 kerneldir=/lib/modules/$(uname -r)/build
   5 cc=gcc
   6 ld=ld
   7 objcopy=objcopy
   8 ar=ar
   9 want_module=1
  10 kvm_trace=
  11 cross_prefix=
  12 arch=`uname -m`
  13 # don't use uname if kerneldir is set
  14 no_uname=
  15 # we only need depmod_version for kvm.ko install
  16 depmod_version=
  17 if [ -z "TMPDIR" ] ; then
  18     TMPDIR=.
  19 fi
  20
  21 usage() {
  22     cat <<-EOF
  23         Usage: $0 [options]
  24
  25         Options include:
  26             --arch=ARCH            architecture to compile for ($arch)
  27             --cross-prefix=PREFIX  prefix for cross compile
  28             --with-kvm-trace       Enable kvm_trace
  29             --kerneldir=DIR        kernel build directory ($kerneldir)
  30             --help                 this helpful text
  31 EOF
  32     exit 1
  33 }
  34
  35 while [[ "$1" = -* ]]; do
  36     opt="$1"; shift
  37     arg=
  38     hasarg=
  39     if [[ "$opt" = *=* ]]; then
  40         arg="${opt#*=}"
  41         opt="${opt%%=*}"
  42         hasarg=1
  43     fi
  44     case "$opt" in
  45         --kerneldir)
  46             kerneldir="$arg"
  47             no_uname=1
  48             ;;
  49         --with-patched-kernel)
  50             want_module=
  51             ;;
  52         --with-kvm-trace)
  53             kvm_trace=y
  54             ;;
  55         --arch)
  56             arch="$arg"
  57             ;;
  58         --cross-prefix)
  59             cross_prefix="$arg"
  60             ;;
  61         --help)
  62             usage
  63             ;;
  64         *)
  65             usage
  66             ;;
  67     esac
  68 done
  69
  70 karch="$arch"
  71
  72 case $arch in
  73     i?86*|x86_64*)
  74         arch=${arch/#i?86/i386}
  75         karch="x86"
  76         ;;
  77 esac
  78
  79 processor=${arch#*-}
  80 arch=${arch%%-*}
  81
  82 # see if we have split build and source directories
  83 if [ -d "$kerneldir/include2" ]; then
  84     kernelsourcedir=${kerneldir%/*}/source
  85 fi
  86
  87 if [ -n "$no_uname" -a "$want_module" ]; then
  88     if [ -e "$kerneldir/.kernelrelease" ]; then
  89         depmod_version=`cat "$kerneldir/.kernelrelease"`
  90
  91     elif [ -e "$kerneldir/include/config/kernel.release" ]; then
  92             depmod_version=`cat "$kerneldir/include/config/kernel.release"`
  93     elif [ -e "$kerneldir/.config" ]; then
  94         depmod_version=$(awk '/Linux kernel version:/ { print $NF }' \
  95                          "$kerneldir/.config")
  96     else
  97         echo
  98         echo "Error: kernelversion not found"
  99         echo "Please make sure your kernel is configured"
 100         echo
 101         exit 1
 102     fi
 103 fi
 104
 105 rm -f include/asm include-compat/asm
 106 ln -sf asm-"$karch" include/asm
 107 ln -sf asm-"$karch" include-compat/asm
 108
 109 cat <<EOF > config.mak
 110 ARCH=$arch
 111 PROCESSOR=$processor
 112 PREFIX=$prefix
 113 KERNELDIR=$kerneldir
 114 KERNELSOURCEDIR=$kernelsourcedir
 115 CROSS_COMPILE=$cross_prefix
 116 CC=$cross_prefix$cc
 117 LD=$cross_prefix$ld
 118 OBJCOPY=$cross_prefix$objcopy
 119 AR=$cross_prefix$ar
 120 DEPMOD_VERSION=$depmod_version
 121 EOF
 122
 123 cat <<EOF > config.kbuild
 124 EXT_CONFIG_KVM_TRACE=$kvm_trace
 125 EOF