#! /bin/sh

if test -z "$source_path"; then
  echo Do not invoke this script directly.  It is called
  echo automatically by configure.
  exit 1
fi

write_c_skeleton() {
    cat > $TMPC <<EOF
int main(void) { return 0; }
EOF
}

has() {
  command -v "$1" >/dev/null 2>&1
}

do_compiler() {
  # Run the compiler, capturing its output to the log. First argument
  # is compiler binary to execute.
  local compiler="$1"
  shift
  if test -n "$BASH_VERSION"; then eval '
      echo >>config.log "
funcs: ${FUNCNAME[*]}
lines: ${BASH_LINENO[*]}"
  '; fi
  echo $compiler "$@" >> config.log
  $compiler "$@" >> config.log 2>&1 || return $?
}


TMPDIR1="config-temp"
TMPC="${TMPDIR1}/qemu-conf.c"
TMPE="${TMPDIR1}/qemu-conf.exe"

container="no"
if test $use_containers = "yes"; then
    if has "docker" || has "podman"; then
        container=$($python $source_path/tests/docker/docker.py probe)
    fi
fi

# cross compilers defaults, can be overridden with --cross-cc-ARCH
: ${cross_cc_aarch64="aarch64-linux-gnu-gcc"}
: ${cross_cc_aarch64_be="$cross_cc_aarch64"}
: ${cross_cc_cflags_aarch64_be="-mbig-endian"}
: ${cross_cc_arm="arm-linux-gnueabihf-gcc"}
: ${cross_cc_cflags_armeb="-mbig-endian"}
: ${cross_cc_i386="i386-pc-linux-gnu-gcc"}
: ${cross_cc_cflags_i386="-m32"}
: ${cross_cc_x86_64="x86_64-pc-linux-gnu-gcc"}
: ${cross_cc_cflags_x86_64="-m64"}
: ${cross_cc_ppc="powerpc-linux-gnu-gcc"}
: ${cross_cc_cflags_ppc="-m32"}
: ${cross_cc_ppc64="powerpc-linux-gnu-gcc"}
: ${cross_cc_cflags_ppc64="-m64"}
: ${cross_cc_ppc64le="powerpc64le-linux-gnu-gcc"}
: ${cross_cc_cflags_s390x="-m64"}
: ${cross_cc_cflags_sparc="-m32 -mv8plus -mcpu=ultrasparc"}
: ${cross_cc_cflags_sparc64="-m64 -mcpu=ultrasparc"}

for target in $target_list; do
  arch=${target%%-*}
  case $arch in
    arm|armeb)
      arches=arm
      ;;
    aarch64|aarch64_be)
      arches="aarch64 arm"
      ;;
    mips*)
      arches=mips
      ;;
    ppc*)
      arches=ppc
      ;;
    sh4|sh4eb)
      arches=sh4
      ;;
    x86_64)
      arches="x86_64 i386"
      ;;
    xtensa|xtensaeb)
      arches=xtensa
      ;;
    alpha|cris|hppa|i386|lm32|m68k|openrisc|riscv64|s390x|sh4|sparc64)
      arches=$target
      ;;
    *)
      continue
      ;;
  esac

  container_image=
  case $target in
    aarch64-*)
      # We don't have any bigendian build tools so we only use this for AArch64
      container_image=debian-arm64-cross
      container_cross_cc=aarch64-linux-gnu-gcc
      ;;
    alpha-*)
      container_image=debian-alpha-cross
      container_cross_cc=alpha-linux-gnu-gcc
      ;;
    arm-*)
      # We don't have any bigendian build tools so we only use this for ARM
      container_image=debian-armhf-cross
      container_cross_cc=arm-linux-gnueabihf-gcc
      ;;
    cris-*)
      container_image=fedora-cris-cross
      container_cross_cc=cris-linux-gnu-gcc
      ;;
    hppa-*)
      container_image=debian-hppa-cross
      container_cross_cc=hppa-linux-gnu-gcc
      ;;
    i386-*)
      container_image=fedora-i386-cross
      container_cross_cc=gcc
      ;;
    m68k-*)
      container_image=debian-m68k-cross
      container_cross_cc=m68k-linux-gnu-gcc
      ;;
    mips64el-*)
      container_image=debian-mips64el-cross
      container_cross_cc=mips64el-linux-gnuabi64-gcc
      ;;
    mips64-*)
      container_image=debian-mips64-cross
      container_cross_cc=mips64-linux-gnuabi64-gcc
      ;;
    mipsel-*)
      container_image=debian-mipsel-cross
      container_cross_cc=mipsel-linux-gnu-gcc
      ;;
    mips-*)
      container_image=debian-mips-cross
      container_cross_cc=mips-linux-gnu-gcc
      ;;
    ppc-*|ppc64abi32-*)
      container_image=debian-powerpc-cross
      container_cross_cc=powerpc-linux-gnu-gcc
      ;;
    ppc64-*)
      container_image=debian-ppc64-cross
      container_cross_cc=powerpc64-linux-gnu-gcc
      ;;
    ppc64le-*)
      container_image=debian-ppc64el-cross
      container_cross_cc=powerpc64le-linux-gnu-gcc
      ;;
    riscv64-*)
      container_image=debian-riscv64-cross
      container_cross_cc=riscv64-linux-gnu-gcc
      ;;
    s390x-*)
      container_image=debian-s390x-cross
      container_cross_cc=s390x-linux-gnu-gcc
      ;;
    sh4-*)
      container_image=debian-sh4-cross
      container_cross_cc=sh4-linux-gnu-gcc
      ;;
    sparc64-*)
      container_image=debian-sparc64-cross
      container_cross_cc=sparc64-linux-gnu-gcc
      ;;
    xtensa*-softmmu)
      container_image=debian-xtensa-cross

      # default to the dc232b cpu
      container_cross_cc=/opt/2018.02/xtensa-dc232b-elf/bin/xtensa-dc232b-elf-gcc
      ;;
  esac

  config_target_mak=tests/tcg/config-$target.mak

  echo "# Automatically generated by configure - do not modify" > $config_target_mak
  echo "TARGET_NAME=$arch" >> $config_target_mak
  case $target in
    *-linux-user | *-bsd-user)
      echo "CONFIG_USER_ONLY=y" >> $config_target_mak
      echo "QEMU=\$(BUILD_DIR)/$target/qemu-$arch" >> $config_target_mak
      ;;
    *-softmmu)
      echo "CONFIG_SOFTMMU=y" >> $config_target_mak
      echo "QEMU=\$(BUILD_DIR)/$target/qemu-system-$arch" >> $config_target_mak
      ;;
  esac

  eval "target_compiler_cflags=\${cross_cc_cflags_$arch}"
  echo "CROSS_CC_GUEST_CFLAGS=$target_compiler_cflags" >> $config_target_mak

  got_cross_cc=no
  for i in $arch $arches; do
    if eval test "x\${cross_cc_$i+yes}" != xyes; then
      continue
    fi

    eval "target_compiler=\${cross_cc_$i}"
    if ! has $target_compiler; then
      continue
    fi
    write_c_skeleton
    if ! do_compiler "$target_compiler" $target_compiler_cflags -o $TMPE $TMPC -static ; then
      # For host systems we might get away with building without -static
      if ! do_compiler "$target_compiler" $target_compiler_cflags -o $TMPE $TMPC ; then
        continue
      fi
      echo "CROSS_CC_GUEST_STATIC=y" >> $config_target_mak
    else
      echo "CROSS_CC_GUEST_STATIC=y" >> $config_target_mak
    fi
    echo "CROSS_CC_GUEST=$target_compiler" >> $config_target_mak

    # Test for compiler features for optional tests. We only do this
    # for cross compilers because ensuring the docker containers based
    # compilers is a requirememt for adding a new test that needs a
    # compiler feature.
    case $target in
        aarch64-*)
            if do_compiler "$target_compiler" $target_compiler_cflags \
               -march=armv8.1-a+sve -o $TMPE $TMPC; then
                echo "CROSS_CC_HAS_SVE=y" >> $config_target_mak
            fi
            if do_compiler "$target_compiler" $target_compiler_cflags \
               -march=armv8.3-a -o $TMPE $TMPC; then
                echo "CROSS_CC_HAS_ARMV8_3=y" >> $config_target_mak
            fi
        ;;
    esac

    enabled_cross_compilers="$enabled_cross_compilers $target_compiler"
    got_cross_cc=yes
    break
  done

  if test $got_cross_cc = no && test "$container" != no && test -n "$container_image"; then
    echo "DOCKER_IMAGE=$container_image" >> $config_target_mak
    echo "DOCKER_CROSS_CC_GUEST=$container_cross_cc" >> $config_target_mak
  fi
done

# report container support state
echo "cross containers  $container"

if test -n "$enabled_cross_compilers"; then
    echo
    echo "NOTE: guest cross-compilers enabled:$enabled_cross_compilers"
fi