configure

#!/bin/sh
#
# qemu configure script (c) 2003 Fabrice Bellard
#

# Unset some variables known to interfere with behavior of common tools,
# just as autoconf does.
CLICOLOR_FORCE= GREP_OPTIONS=
unset CLICOLOR_FORCE GREP_OPTIONS

# Don't allow CCACHE, if present, to use cached results of compile tests!
export CCACHE_RECACHE=yes

# make source path absolute
source_path=$(cd "$(dirname -- "$0")"; pwd)

if test "$PWD" = "$source_path"
then
    echo "Using './build' as the directory for build output"

    MARKER=build/auto-created-by-configure

    if test -e build
    then
        if test -f $MARKER
        then
           rm -rf build
        else
            echo "ERROR: ./build dir already exists and was not previously created by configure"
            exit 1
        fi
    fi

    mkdir build
    touch $MARKER

    cat > GNUmakefile <<'EOF'
# This file is auto-generated by configure to support in-source tree
# 'make' command invocation

ifeq ($(MAKECMDGOALS),)
recurse: all
endif

.NOTPARALLEL: %
%: force
	@echo 'changing dir to build for $(MAKE) "$(MAKECMDGOALS)"...'
	@$(MAKE) -C build -f Makefile $(MAKECMDGOALS)
	@if test "$(MAKECMDGOALS)" = "distclean" && \
	    test -e build/auto-created-by-configure ; \
	then \
	    rm -rf build GNUmakefile ; \
	fi
force: ;
.PHONY: force
GNUmakefile: ;

EOF
    cd build
    exec "$source_path/configure" "$@"
fi

# Temporary directory used for files created while
# configure runs. Since it is in the build directory
# we can safely blow away any previous version of it
# (and we need not jump through hoops to try to delete
# it when configure exits.)
TMPDIR1="config-temp"
rm -rf "${TMPDIR1}"
if ! mkdir -p "${TMPDIR1}"; then
    echo "ERROR: failed to create temporary directory"
    exit 1
fi

TMPB="qemu-conf"
TMPC="${TMPDIR1}/${TMPB}.c"
TMPO="${TMPDIR1}/${TMPB}.o"
TMPM="${TMPDIR1}/${TMPB}.m"
TMPE="${TMPDIR1}/${TMPB}.exe"

rm -f config.log

# Print a helpful header at the top of config.log
echo "# QEMU configure log $(date)" >> config.log
printf "# Configured with:" >> config.log
# repeat the invocation to log and stdout for CI
invoke=$(printf " '%s'" "$0" "$@")
test -n "$GITLAB_CI" && echo "configuring with: $invoke"
{ echo "$invoke"; echo; echo "#"; } >> config.log

quote_sh() {
    printf "%s" "$1" | sed "s,','\\\\'',g; s,.*,'&',"
}

print_error() {
    (echo
    echo "ERROR: $1"
    while test -n "$2"; do
        echo "       $2"
        shift
    done
    echo) >&2
}

error_exit() {
    print_error "$@"
    exit 1
}

do_compiler() {
  # Run the compiler, capturing its output to the log. First argument
  # is compiler binary to execute.
  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 $?
}

do_compiler_werror() {
    # Run the compiler, capturing its output to the log. First argument
    # is compiler binary to execute.
    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 $?
    # Test passed. If this is an --enable-werror build, rerun
    # the test with -Werror and bail out if it fails. This
    # makes warning-generating-errors in configure test code
    # obvious to developers.
    if test "$werror" != "yes"; then
        return 0
    fi
    # Don't bother rerunning the compile if we were already using -Werror
    case "$*" in
        *-Werror*)
           return 0
        ;;
    esac
    echo $compiler -Werror "$@" >> config.log
    $compiler -Werror "$@" >> config.log 2>&1 && return $?
    error_exit "configure test passed without -Werror but failed with -Werror." \
        "This is probably a bug in the configure script. The failing command" \
        "will be at the bottom of config.log." \
        "You can run configure with --disable-werror to bypass this check."
}

do_cc() {
    do_compiler_werror "$cc" $CPU_CFLAGS "$@"
}

do_objc() {
    do_compiler_werror "$objcc" $CPU_CFLAGS "$@"
}

# Append $2 to the variable named $1, with space separation
add_to() {
    eval $1=\${$1:+\"\$$1 \"}\$2
}

compile_object() {
  local_cflags="$1"
  do_cc $CFLAGS $EXTRA_CFLAGS $CONFIGURE_CFLAGS $QEMU_CFLAGS $local_cflags -c -o $TMPO $TMPC
}

compile_prog() {
  local_cflags="$1"
  local_ldflags="$2"
  do_cc $CFLAGS $EXTRA_CFLAGS $CONFIGURE_CFLAGS $QEMU_CFLAGS $local_cflags -o $TMPE $TMPC \
      $LDFLAGS $EXTRA_LDFLAGS $CONFIGURE_LDFLAGS $QEMU_LDFLAGS $local_ldflags
}

# symbolically link $1 to $2.  Portable version of "ln -sf".
symlink() {
  rm -rf "$2"
  mkdir -p "$(dirname "$2")"
  ln -s "$1" "$2"
}

# check whether a command is available to this shell (may be either an
# executable or a builtin)
has() {
    type "$1" >/dev/null 2>&1
}

version_ge () {
    local_ver1=$(expr "$1" : '\([0-9.]*\)' | tr . ' ')
    local_ver2=$(echo "$2" | tr . ' ')
    while true; do
        set x $local_ver1
        local_first=${2-0}
        # 'shift 2' if $2 is set, or 'shift' if $2 is not set
        shift ${2:+2}
        local_ver1=$*
        set x $local_ver2
        # the second argument finished, the first must be greater or equal
        test $# = 1 && return 0
        test $local_first -lt $2 && return 1
        test $local_first -gt $2 && return 0
        shift ${2:+2}
        local_ver2=$*
    done
}

if printf %s\\n "$source_path" "$PWD" | grep -q "[[:space:]:]";
then
  error_exit "main directory cannot contain spaces nor colons"
fi

# default parameters
cpu=""
static="no"
cross_compile="no"
cross_prefix=""
host_cc="cc"
stack_protector=""
safe_stack=""
use_containers="yes"
gdb_bin=$(command -v "gdb-multiarch" || command -v "gdb")

if test -e "$source_path/.git"
then
    git_submodules_action="update"
else
    git_submodules_action="ignore"
fi

git_submodules="ui/keycodemapdb"
git="git"

# Don't accept a target_list environment variable.
unset target_list
unset target_list_exclude

# Default value for a variable defining feature "foo".
#  * foo="no"  feature will only be used if --enable-foo arg is given
#  * foo=""    feature will be searched for, and if found, will be used
#              unless --disable-foo is given
#  * foo="yes" this value will only be set by --enable-foo flag.
#              feature will searched for,
#              if not found, configure exits with error
#
# Always add --enable-foo and --disable-foo command line args.
# Distributions want to ensure that several features are compiled in, and it
# is impossible without a --enable-foo that exits if a feature is not found.

default_feature=""
# parse CC options second
for opt do
  optarg=$(expr "x$opt" : 'x[^=]*=\(.*\)')
  case "$opt" in
      --without-default-features)
          default_feature="no"
  ;;
  esac
done

EXTRA_CFLAGS=""
EXTRA_CXXFLAGS=""
EXTRA_OBJCFLAGS=""
EXTRA_LDFLAGS=""

debug_tcg="no"
sanitizers="no"
tsan="no"
fortify_source="yes"
EXESUF=""
modules="no"
prefix="/usr/local"
qemu_suffix="qemu"
softmmu="yes"
linux_user=""
bsd_user=""
pie=""
coroutine=""
plugins="$default_feature"
meson=""
ninja=""
bindir="bin"
skip_meson=no
vfio_user_server="disabled"

# The following Meson options are handled manually (still they
# are included in the automatically generated help message)

# 1. Track which submodules are needed
fdt="auto"

# 2. Automatically enable/disable other options
tcg="auto"
cfi="false"

# parse CC options second
for opt do
  optarg=$(expr "x$opt" : 'x[^=]*=\(.*\)')
  case "$opt" in
  --cross-prefix=*) cross_prefix="$optarg"
                    cross_compile="yes"
  ;;
  --cc=*) CC="$optarg"
  ;;
  --cxx=*) CXX="$optarg"
  ;;
  --cpu=*) cpu="$optarg"
  ;;
  --extra-cflags=*)
    EXTRA_CFLAGS="$EXTRA_CFLAGS $optarg"
    EXTRA_CXXFLAGS="$EXTRA_CXXFLAGS $optarg"
    EXTRA_OBJCFLAGS="$EXTRA_OBJCFLAGS $optarg"
    ;;
  --extra-cxxflags=*) EXTRA_CXXFLAGS="$EXTRA_CXXFLAGS $optarg"
  ;;
  --extra-objcflags=*) EXTRA_OBJCFLAGS="$EXTRA_OBJCFLAGS $optarg"
  ;;
  --extra-ldflags=*) EXTRA_LDFLAGS="$EXTRA_LDFLAGS $optarg"
  ;;
  --cross-cc-*[!a-zA-Z0-9_-]*=*) error_exit "Passed bad --cross-cc-FOO option"
  ;;
  --cross-cc-cflags-*) cc_arch=${opt#--cross-cc-cflags-}; cc_arch=${cc_arch%%=*}
                      eval "cross_cc_cflags_${cc_arch}=\$optarg"
  ;;
  --cross-cc-*) cc_arch=${opt#--cross-cc-}; cc_arch=${cc_arch%%=*}
                eval "cross_cc_${cc_arch}=\$optarg"
  ;;
  --cross-prefix-*[!a-zA-Z0-9_-]*=*) error_exit "Passed bad --cross-prefix-FOO option"
  ;;
  --cross-prefix-*) cc_arch=${opt#--cross-prefix-}; cc_arch=${cc_arch%%=*}
                    eval "cross_prefix_${cc_arch}=\$optarg"
  ;;
  esac
done

# Preferred compiler:
#  ${CC} (if set)
#  ${cross_prefix}gcc (if cross-prefix specified)
#  system compiler
if test -z "${CC}${cross_prefix}"; then
  cc="$host_cc"
else
  cc="${CC-${cross_prefix}gcc}"
fi

if test -z "${CXX}${cross_prefix}"; then
  cxx="c++"
else
  cxx="${CXX-${cross_prefix}g++}"
fi

ar="${AR-${cross_prefix}ar}"
as="${AS-${cross_prefix}as}"
ccas="${CCAS-$cc}"
objcopy="${OBJCOPY-${cross_prefix}objcopy}"
ld="${LD-${cross_prefix}ld}"
ranlib="${RANLIB-${cross_prefix}ranlib}"
nm="${NM-${cross_prefix}nm}"
smbd="$SMBD"
strip="${STRIP-${cross_prefix}strip}"
widl="${WIDL-${cross_prefix}widl}"
windres="${WINDRES-${cross_prefix}windres}"
windmc="${WINDMC-${cross_prefix}windmc}"
pkg_config_exe="${PKG_CONFIG-${cross_prefix}pkg-config}"
query_pkg_config() {
    "${pkg_config_exe}" ${QEMU_PKG_CONFIG_FLAGS} "$@"
}
pkg_config=query_pkg_config
sdl2_config="${SDL2_CONFIG-${cross_prefix}sdl2-config}"

# default flags for all hosts
# We use -fwrapv to tell the compiler that we require a C dialect where
# left shift of signed integers is well defined and has the expected
# 2s-complement style results. (Both clang and gcc agree that it
# provides these semantics.)
QEMU_CFLAGS="-fno-strict-aliasing -fno-common -fwrapv"
QEMU_CFLAGS="-D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE $QEMU_CFLAGS"

QEMU_LDFLAGS=

# Flags that are needed during configure but later taken care of by Meson
CONFIGURE_CFLAGS="-std=gnu11 -Wall"
CONFIGURE_LDFLAGS=


check_define() {
cat > $TMPC <<EOF
#if !defined($1)
#error $1 not defined
#endif
int main(void) { return 0; }
EOF
  compile_object
}

check_include() {
cat > $TMPC <<EOF
#include <$1>
int main(void) { return 0; }
EOF
  compile_object
}

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

if check_define __linux__ ; then
  targetos=linux
elif check_define _WIN32 ; then
  targetos=windows
elif check_define __OpenBSD__ ; then
  targetos=openbsd
elif check_define __sun__ ; then
  targetos=sunos
elif check_define __HAIKU__ ; then
  targetos=haiku
elif check_define __FreeBSD__ ; then
  targetos=freebsd
elif check_define __FreeBSD_kernel__ && check_define __GLIBC__; then
  targetos=gnu/kfreebsd
elif check_define __DragonFly__ ; then
  targetos=dragonfly
elif check_define __NetBSD__; then
  targetos=netbsd
elif check_define __APPLE__; then
  targetos=darwin
else
  # This is a fatal error, but don't report it yet, because we
  # might be going to just print the --help text, or it might
  # be the result of a missing compiler.
  targetos=bogus
fi

# OS specific

mingw32="no"
bsd="no"
linux="no"
solaris="no"
case $targetos in
windows)
  mingw32="yes"
  plugins="no"
  pie="no"
;;
gnu/kfreebsd)
  bsd="yes"
;;
freebsd)
  bsd="yes"
  make="${MAKE-gmake}"
  # needed for kinfo_getvmmap(3) in libutil.h
;;
dragonfly)
  bsd="yes"
  make="${MAKE-gmake}"
;;
netbsd)
  bsd="yes"
  make="${MAKE-gmake}"
;;
openbsd)
  bsd="yes"
  make="${MAKE-gmake}"
;;
darwin)
  bsd="yes"
  darwin="yes"
  # Disable attempts to use ObjectiveC features in os/object.h since they
  # won't work when we're compiling with gcc as a C compiler.
  QEMU_CFLAGS="-DOS_OBJECT_USE_OBJC=0 $QEMU_CFLAGS"
;;
sunos)
  solaris="yes"
  make="${MAKE-gmake}"
# needed for CMSG_ macros in sys/socket.h
  QEMU_CFLAGS="-D_XOPEN_SOURCE=600 $QEMU_CFLAGS"
# needed for TIOCWIN* defines in termios.h
  QEMU_CFLAGS="-D__EXTENSIONS__ $QEMU_CFLAGS"
;;
haiku)
  pie="no"
  QEMU_CFLAGS="-DB_USE_POSITIVE_POSIX_ERRORS -D_BSD_SOURCE -fPIC $QEMU_CFLAGS"
;;
linux)
  linux="yes"
;;
esac

if test ! -z "$cpu" ; then
  # command line argument
  :
elif check_define __i386__ ; then
  cpu="i386"
elif check_define __x86_64__ ; then
  if check_define __ILP32__ ; then
    cpu="x32"
  else
    cpu="x86_64"
  fi
elif check_define __sparc__ ; then
  if check_define __arch64__ ; then
    cpu="sparc64"
  else
    cpu="sparc"
  fi
elif check_define _ARCH_PPC ; then
  if check_define _ARCH_PPC64 ; then
    if check_define _LITTLE_ENDIAN ; then
      cpu="ppc64le"
    else
      cpu="ppc64"
    fi
  else
    cpu="ppc"
  fi
elif check_define __mips__ ; then
  cpu="mips"
elif check_define __s390__ ; then
  if check_define __s390x__ ; then
    cpu="s390x"
  else
    cpu="s390"
  fi
elif check_define __riscv ; then
  cpu="riscv"
elif check_define __arm__ ; then
  cpu="arm"
elif check_define __aarch64__ ; then
  cpu="aarch64"
elif check_define __loongarch64 ; then
  cpu="loongarch64"
else
  # Using uname is really broken, but it is just a fallback for architectures
  # that are going to use TCI anyway
  cpu=$(uname -m)
  echo "WARNING: unrecognized host CPU, proceeding with 'uname -m' output '$cpu'"
fi

# Normalise host CPU name and set multilib cflags.  The canonicalization
# isn't really necessary, because the architectures that we check for
# should not hit the 'uname -m' case, but better safe than sorry.
# Note that this case should only have supported host CPUs, not guests.
case "$cpu" in
  armv*b|armv*l|arm)
    cpu="arm" ;;

  i386|i486|i586|i686)
    cpu="i386"
    CPU_CFLAGS="-m32" ;;
  x32)
    cpu="x86_64"
    CPU_CFLAGS="-mx32" ;;
  x86_64|amd64)
    cpu="x86_64"
    # ??? Only extremely old AMD cpus do not have cmpxchg16b.
    # If we truly care, we should simply detect this case at
    # runtime and generate the fallback to serial emulation.
    CPU_CFLAGS="-m64 -mcx16" ;;

  mips*)
    cpu="mips" ;;

  ppc)
    CPU_CFLAGS="-m32" ;;
  ppc64)
    CPU_CFLAGS="-m64 -mbig-endian" ;;
  ppc64le)
    cpu="ppc64"
    CPU_CFLAGS="-m64 -mlittle-endian" ;;

  s390)
    CPU_CFLAGS="-m31" ;;
  s390x)
    CPU_CFLAGS="-m64" ;;

  sparc|sun4[cdmuv])
    cpu="sparc"
    CPU_CFLAGS="-m32 -mv8plus -mcpu=ultrasparc" ;;
  sparc64)
    CPU_CFLAGS="-m64 -mcpu=ultrasparc" ;;
esac

: ${make=${MAKE-make}}

# We prefer python 3.x. A bare 'python' is traditionally
# python 2.x, but some distros have it as python 3.x, so
# we check that too
python=
explicit_python=no
for binary in "${PYTHON-python3}" python
do
    if has "$binary"
    then
        python=$(command -v "$binary")
        break
    fi
done


# Check for ancillary tools used in testing
genisoimage=
for binary in genisoimage mkisofs
do
    if has $binary
    then
        genisoimage=$(command -v "$binary")
        break
    fi
done

# Default objcc to clang if available, otherwise use CC
if has clang; then
  objcc=clang
else
  objcc="$cc"
fi

if test "$mingw32" = "yes" ; then
  EXESUF=".exe"
  # MinGW needs -mthreads for TLS and macro _MT.
  CONFIGURE_CFLAGS="-mthreads $CONFIGURE_CFLAGS"
  prefix="/qemu"
  bindir=""
  qemu_suffix=""
fi

werror=""

meson_option_build_array() {
  printf '['
  (if test "$targetos" = windows; then
    IFS=\;
  else
    IFS=:
  fi
  for e in $1; do
    printf '"""'
    # backslash escape any '\' and '"' characters
    printf "%s" "$e" | sed -e 's/\([\"]\)/\\\1/g'
    printf '""",'
  done)
  printf ']\n'
}

. "$source_path/scripts/meson-buildoptions.sh"

meson_options=
meson_option_add() {
  meson_options="$meson_options $(quote_sh "$1")"
}
meson_option_parse() {
  meson_options="$meson_options $(_meson_option_parse "$@")"
  if test $? -eq 1; then
    echo "ERROR: unknown option $1"
    echo "Try '$0 --help' for more information"
    exit 1
  fi
}

for opt do
  optarg=$(expr "x$opt" : 'x[^=]*=\(.*\)')
  case "$opt" in
  --help|-h) show_help=yes
  ;;
  --version|-V) exec cat "$source_path/VERSION"
  ;;
  --prefix=*) prefix="$optarg"
  ;;
  --cross-prefix=*)
  ;;
  --cc=*)
  ;;
  --host-cc=*) host_cc="$optarg"
  ;;
  --cxx=*)
  ;;
  --objcc=*) objcc="$optarg"
  ;;
  --make=*) make="$optarg"
  ;;
  --install=*)
  ;;
  --python=*) python="$optarg" ; explicit_python=yes
  ;;
  --skip-meson) skip_meson=yes
  ;;
  --meson=*) meson="$optarg"
  ;;
  --ninja=*) ninja="$optarg"
  ;;
  --smbd=*) smbd="$optarg"
  ;;
  --extra-cflags=*)
  ;;
  --extra-cxxflags=*)
  ;;
  --extra-objcflags=*)
  ;;
  --extra-ldflags=*)
  ;;
  --cross-cc-*)
  ;;
  --cross-prefix-*)
  ;;
  --enable-debug-info) meson_option_add -Ddebug=true
  ;;
  --disable-debug-info) meson_option_add -Ddebug=false
  ;;
  --enable-modules)
      modules="yes"
  ;;
  --disable-modules)
      modules="no"
  ;;
  --cpu=*)
  ;;
  --target-list=*) target_list="$optarg"
                   if test "$target_list_exclude"; then
                       error_exit "Can't mix --target-list with --target-list-exclude"
                   fi
  ;;
  --target-list-exclude=*) target_list_exclude="$optarg"
                   if test "$target_list"; then
                       error_exit "Can't mix --target-list-exclude with --target-list"
                   fi
  ;;
  --with-default-devices) meson_option_add -Ddefault_devices=true
  ;;
  --without-default-devices) meson_option_add -Ddefault_devices=false
  ;;
  --with-devices-*[!a-zA-Z0-9_-]*=*) error_exit "Passed bad --with-devices-FOO option"
  ;;
  --with-devices-*) device_arch=${opt#--with-devices-};
                    device_arch=${device_arch%%=*}
                    cf=$source_path/configs/devices/$device_arch-softmmu/$optarg.mak
                    if test -f "$cf"; then
                        device_archs="$device_archs $device_arch"
                        eval "devices_${device_arch}=\$optarg"
                    else
                        error_exit "File $cf does not exist"
                    fi
  ;;
  --without-default-features) # processed above
  ;;
  --static)
    static="yes"
    QEMU_PKG_CONFIG_FLAGS="--static $QEMU_PKG_CONFIG_FLAGS"
  ;;
  --bindir=*) bindir="$optarg"
  ;;
  --with-suffix=*) qemu_suffix="$optarg"
  ;;
  --host=*|--build=*|\
  --disable-dependency-tracking|\
  --sbindir=*|--sharedstatedir=*|\
  --oldincludedir=*|--datarootdir=*|--infodir=*|\
  --htmldir=*|--dvidir=*|--pdfdir=*|--psdir=*)
    # These switches are silently ignored, for compatibility with
    # autoconf-generated configure scripts. This allows QEMU's
    # configure to be used by RPM and similar macros that set
    # lots of directory switches by default.
  ;;
  --enable-debug-tcg) debug_tcg="yes"
  ;;
  --disable-debug-tcg) debug_tcg="no"
  ;;
  --enable-debug)
      # Enable debugging options that aren't excessively noisy
      debug_tcg="yes"
      meson_option_parse --enable-debug-mutex ""
      meson_option_add -Doptimization=0
      fortify_source="no"
  ;;
  --enable-sanitizers) sanitizers="yes"
  ;;
  --disable-sanitizers) sanitizers="no"
  ;;
  --enable-tsan) tsan="yes"
  ;;
  --disable-tsan) tsan="no"
  ;;
  --disable-tcg) tcg="disabled"
                 plugins="no"
  ;;
  --enable-tcg) tcg="enabled"
  ;;
  --disable-system) softmmu="no"
  ;;
  --enable-system) softmmu="yes"
  ;;
  --disable-user)
      linux_user="no" ;
      bsd_user="no" ;
  ;;
  --enable-user) ;;
  --disable-linux-user) linux_user="no"
  ;;
  --enable-linux-user) linux_user="yes"
  ;;
  --disable-bsd-user) bsd_user="no"
  ;;
  --enable-bsd-user) bsd_user="yes"
  ;;
  --enable-pie) pie="yes"
  ;;
  --disable-pie) pie="no"
  ;;
  --enable-werror) werror="yes"
  ;;
  --disable-werror) werror="no"
  ;;
  --enable-stack-protector) stack_protector="yes"
  ;;
  --disable-stack-protector) stack_protector="no"
  ;;
  --enable-safe-stack) safe_stack="yes"
  ;;
  --disable-safe-stack) safe_stack="no"
  ;;
  --enable-cfi)
      cfi="true";
      meson_option_add -Db_lto=true
  ;;
  --disable-cfi) cfi="false"
  ;;
  --disable-fdt) fdt="disabled"
  ;;
  --enable-fdt) fdt="enabled"
  ;;
  --enable-fdt=git) fdt="internal"
  ;;
  --enable-fdt=*) fdt="$optarg"
  ;;
  --with-coroutine=*) coroutine="$optarg"
  ;;
  --with-git=*) git="$optarg"
  ;;
  --with-git-submodules=*)
      git_submodules_action="$optarg"
  ;;
  --enable-plugins) if test "$mingw32" = "yes"; then
                        error_exit "TCG plugins not currently supported on Windows platforms"
                    else
                        plugins="yes"
                    fi
  ;;
  --disable-plugins) plugins="no"
  ;;
  --enable-containers) use_containers="yes"
  ;;
  --disable-containers) use_containers="no"
  ;;
  --gdb=*) gdb_bin="$optarg"
  ;;
  --enable-vfio-user-server) vfio_user_server="enabled"
  ;;
  --disable-vfio-user-server) vfio_user_server="disabled"
  ;;
  # everything else has the same name in configure and meson
  --*) meson_option_parse "$opt" "$optarg"
  ;;
  esac
done

# test for any invalid configuration combinations
if test "$plugins" = "yes" -a "$tcg" = "disabled"; then
    error_exit "Can't enable plugins on non-TCG builds"
fi

case $git_submodules_action in
    update|validate)
        if test ! -e "$source_path/.git"; then
            echo "ERROR: cannot $git_submodules_action git submodules without .git"
            exit 1
        fi
    ;;
    ignore)
        if ! test -f "$source_path/ui/keycodemapdb/README"
        then
            echo
            echo "ERROR: missing GIT submodules"
            echo
            if test -e "$source_path/.git"; then
                echo "--with-git-submodules=ignore specified but submodules were not"
                echo "checked out.  Please initialize and update submodules."
            else
                echo "This is not a GIT checkout but module content appears to"
                echo "be missing. Do not use 'git archive' or GitHub download links"
                echo "to acquire QEMU source archives. Non-GIT builds are only"
                echo "supported with source archives linked from:"
                echo
                echo "  https://www.qemu.org/download/#source"
                echo
                echo "Developers working with GIT can use scripts/archive-source.sh"
                echo "if they need to create valid source archives."
            fi
            echo
            exit 1
        fi
    ;;
    *)
        echo "ERROR: invalid --with-git-submodules= value '$git_submodules_action'"
        exit 1
    ;;
esac

default_target_list=""
mak_wilds=""

if [ "$linux_user" != no ]; then
    if [ "$targetos" = linux ] && [ -d "$source_path/linux-user/include/host/$cpu" ]; then
        linux_user=yes
    elif [ "$linux_user" = yes ]; then
        error_exit "linux-user not supported on this architecture"
    fi
fi
if [ "$bsd_user" != no ]; then
    if [ "$bsd_user" = "" ]; then
        test $targetos = freebsd && bsd_user=yes
    fi
    if [ "$bsd_user" = yes ] && ! [ -d "$source_path/bsd-user/$targetos" ]; then
        error_exit "bsd-user not supported on this host OS"
    fi
fi
if [ "$softmmu" = "yes" ]; then
    mak_wilds="${mak_wilds} $source_path/configs/targets/*-softmmu.mak"
fi
if [ "$linux_user" = "yes" ]; then
    mak_wilds="${mak_wilds} $source_path/configs/targets/*-linux-user.mak"
fi
if [ "$bsd_user" = "yes" ]; then
    mak_wilds="${mak_wilds} $source_path/configs/targets/*-bsd-user.mak"
fi

for config in $mak_wilds; do
    target="$(basename "$config" .mak)"
    if echo "$target_list_exclude" | grep -vq "$target"; then
        default_target_list="${default_target_list} $target"
    fi
done

if test x"$show_help" = x"yes" ; then
cat << EOF

Usage: configure [options]
Options: [defaults in brackets after descriptions]

Standard options:
  --help                   print this message
  --prefix=PREFIX          install in PREFIX [$prefix]
  --target-list=LIST       set target list (default: build all)
$(echo Available targets: $default_target_list | \
  fold -s -w 53 | sed -e 's/^/                           /')
  --target-list-exclude=LIST exclude a set of targets from the default target-list

Advanced options (experts only):
  --cross-prefix=PREFIX    use PREFIX for compile tools, PREFIX can be blank [$cross_prefix]
  --cc=CC                  use C compiler CC [$cc]
  --host-cc=CC             use C compiler CC [$host_cc] for code run at
                           build time
  --cxx=CXX                use C++ compiler CXX [$cxx]
  --objcc=OBJCC            use Objective-C compiler OBJCC [$objcc]
  --extra-cflags=CFLAGS    append extra C compiler flags CFLAGS
  --extra-cxxflags=CXXFLAGS append extra C++ compiler flags CXXFLAGS
  --extra-objcflags=OBJCFLAGS append extra Objective C compiler flags OBJCFLAGS
  --extra-ldflags=LDFLAGS  append extra linker flags LDFLAGS
  --cross-cc-ARCH=CC       use compiler when building ARCH guest test cases
  --cross-cc-cflags-ARCH=  use compiler flags when building ARCH guest tests
  --cross-prefix-ARCH=PREFIX cross compiler prefix when building ARCH guest test cases
  --make=MAKE              use specified make [$make]
  --python=PYTHON          use specified python [$python]
  --meson=MESON            use specified meson [$meson]
  --ninja=NINJA            use specified ninja [$ninja]
  --smbd=SMBD              use specified smbd [$smbd]
  --with-git=GIT           use specified git [$git]
  --with-git-submodules=update   update git submodules (default if .git dir exists)
  --with-git-submodules=validate fail if git submodules are not up to date
  --with-git-submodules=ignore   do not update or check git submodules (default if no .git dir)
  --static                 enable static build [$static]
  --bindir=PATH            install binaries in PATH
  --with-suffix=SUFFIX     suffix for QEMU data inside datadir/libdir/sysconfdir/docdir [$qemu_suffix]
  --without-default-features default all --enable-* options to "disabled"
  --without-default-devices  do not include any device that is not needed to
                           start the emulator (only use if you are including
                           desired devices in configs/devices/)
  --with-devices-ARCH=NAME override default configs/devices
  --enable-debug           enable common debug build options
  --enable-sanitizers      enable default sanitizers
  --enable-tsan            enable thread sanitizer
  --disable-werror         disable compilation abort on warning
  --disable-stack-protector disable compiler-provided stack protection
  --cpu=CPU                Build for host CPU [$cpu]
  --with-coroutine=BACKEND coroutine backend. Supported options:
                           ucontext, sigaltstack, windows
  --enable-plugins
                           enable plugins via shared library loading
  --disable-containers     don't use containers for cross-building
  --gdb=GDB-path           gdb to use for gdbstub tests [$gdb_bin]
EOF
  meson_options_help
cat << EOF
  system          all system emulation targets
  user            supported user emulation targets
  linux-user      all linux usermode emulation targets
  bsd-user        all BSD usermode emulation targets
  pie             Position Independent Executables
  modules         modules support (non-Windows)
  debug-tcg       TCG debugging (default is disabled)
  debug-info      debugging information
  safe-stack      SafeStack Stack Smash Protection. Depends on
                  clang/llvm >= 3.7 and requires coroutine backend ucontext.

NOTE: The object files are built at the place where configure is launched
EOF
exit 0
fi

# Remove old dependency files to make sure that they get properly regenerated
rm -f ./*/config-devices.mak.d

if test -z "$python"
then
    error_exit "Python not found. Use --python=/path/to/python"
fi
if ! has "$make"
then
    error_exit "GNU make ($make) not found"
fi

# Note that if the Python conditional here evaluates True we will exit
# with status 1 which is a shell 'false' value.
if ! $python -c 'import sys; sys.exit(sys.version_info < (3,6))'; then
  error_exit "Cannot use '$python', Python >= 3.6 is required." \
      "Use --python=/path/to/python to specify a supported Python."
fi

# Suppress writing compiled files
python="$python -B"

if test -z "$meson"; then
    if test "$explicit_python" = no && has meson && version_ge "$(meson --version)" 0.61.5; then
        meson=meson
    elif test "$git_submodules_action" != 'ignore' ; then
        meson=git
    elif test -e "${source_path}/meson/meson.py" ; then
        meson=internal
    else
        if test "$explicit_python" = yes; then
            error_exit "--python requires using QEMU's embedded Meson distribution, but it was not found."
        else
            error_exit "Meson not found.  Use --meson=/path/to/meson"
        fi
    fi
else
    # Meson uses its own Python interpreter to invoke other Python scripts,
    # but the user wants to use the one they specified with --python.
    #
    # We do not want to override the distro Python interpreter (and sometimes
    # cannot: for example in Homebrew /usr/bin/meson is a bash script), so
    # just require --meson=git|internal together with --python.
    if test "$explicit_python" = yes; then
        case "$meson" in
            git | internal) ;;
            *) error_exit "--python requires using QEMU's embedded Meson distribution." ;;
        esac
    fi
fi

if test "$meson" = git; then
    git_submodules="${git_submodules} meson"
fi

case "$meson" in
    git | internal)
        meson="$python ${source_path}/meson/meson.py"
        ;;
    *) meson=$(command -v "$meson") ;;
esac

# Probe for ninja

if test -z "$ninja"; then
    for c in ninja ninja-build samu; do
        if has $c; then
            ninja=$(command -v "$c")
            break
        fi
    done
    if test -z "$ninja"; then
      error_exit "Cannot find Ninja"
    fi
fi

# Check that the C compiler works. Doing this here before testing
# the host CPU ensures that we had a valid CC to autodetect the
# $cpu var (and we should bail right here if that's not the case).
# It also allows the help message to be printed without a CC.
write_c_skeleton;
if compile_object ; then
  : C compiler works ok
else
    error_exit "\"$cc\" either does not exist or does not work"
fi
if ! compile_prog ; then
    error_exit "\"$cc\" cannot build an executable (is your linker broken?)"
fi

# Consult white-list to determine whether to enable werror
# by default.  Only enable by default for git builds
if test -z "$werror" ; then
    if test "$git_submodules_action" != "ignore" && \
        { test "$linux" = "yes" || test "$mingw32" = "yes"; }; then
        werror="yes"
    else
        werror="no"
    fi
fi

if test "$targetos" = "bogus"; then
    # Now that we know that we're not printing the help and that
    # the compiler works (so the results of the check_defines we used
    # to identify the OS are reliable), if we didn't recognize the
    # host OS we should stop now.
    error_exit "Unrecognized host OS (uname -s reports '$(uname -s)')"
fi

# Check whether the compiler matches our minimum requirements:
cat > $TMPC << EOF
#if defined(__clang_major__) && defined(__clang_minor__)
# ifdef __apple_build_version__
#  if __clang_major__ < 10 || (__clang_major__ == 10 && __clang_minor__ < 0)
#   error You need at least XCode Clang v10.0 to compile QEMU
#  endif
# else
#  if __clang_major__ < 6 || (__clang_major__ == 6 && __clang_minor__ < 0)
#   error You need at least Clang v6.0 to compile QEMU
#  endif
# endif
#elif defined(__GNUC__) && defined(__GNUC_MINOR__)
# if __GNUC__ < 7 || (__GNUC__ == 7 && __GNUC_MINOR__ < 4)
#  error You need at least GCC v7.4.0 to compile QEMU
# endif
#else
# error You either need GCC or Clang to compiler QEMU
#endif
int main (void) { return 0; }
EOF
if ! compile_prog "" "" ; then
    error_exit "You need at least GCC v7.4 or Clang v6.0 (or XCode Clang v10.0)"
fi

# Accumulate -Wfoo and -Wno-bar separately.
# We will list all of the enable flags first, and the disable flags second.
# Note that we do not add -Werror, because that would enable it for all
# configure tests. If a configure test failed due to -Werror this would
# just silently disable some features, so it's too error prone.

warn_flags=
add_to warn_flags -Wundef
add_to warn_flags -Wwrite-strings
add_to warn_flags -Wmissing-prototypes
add_to warn_flags -Wstrict-prototypes
add_to warn_flags -Wredundant-decls
add_to warn_flags -Wold-style-declaration
add_to warn_flags -Wold-style-definition
add_to warn_flags -Wtype-limits
add_to warn_flags -Wformat-security
add_to warn_flags -Wformat-y2k
add_to warn_flags -Winit-self
add_to warn_flags -Wignored-qualifiers
add_to warn_flags -Wempty-body
add_to warn_flags -Wnested-externs
add_to warn_flags -Wendif-labels
add_to warn_flags -Wexpansion-to-defined
add_to warn_flags -Wimplicit-fallthrough=2
add_to warn_flags -Wmissing-format-attribute

nowarn_flags=
add_to nowarn_flags -Wno-initializer-overrides
add_to nowarn_flags -Wno-missing-include-dirs
add_to nowarn_flags -Wno-shift-negative-value
add_to nowarn_flags -Wno-string-plus-int
add_to nowarn_flags -Wno-typedef-redefinition
add_to nowarn_flags -Wno-tautological-type-limit-compare
add_to nowarn_flags -Wno-psabi
add_to nowarn_flags -Wno-gnu-variable-sized-type-not-at-end

gcc_flags="$warn_flags $nowarn_flags"

cc_has_warning_flag() {
    write_c_skeleton;

    # Use the positive sense of the flag when testing for -Wno-wombat
    # support (gcc will happily accept the -Wno- form of unknown
    # warning options).
    optflag="$(echo $1 | sed -e 's/^-Wno-/-W/')"
    compile_prog "-Werror $optflag" ""
}

objcc_has_warning_flag() {
    cat > $TMPM <<EOF
int main(void) { return 0; }
EOF

    # Use the positive sense of the flag when testing for -Wno-wombat
    # support (gcc will happily accept the -Wno- form of unknown
    # warning options).
    optflag="$(echo $1 | sed -e 's/^-Wno-/-W/')"
    do_objc -Werror $optflag \
      $OBJCFLAGS $EXTRA_OBJCFLAGS $CONFIGURE_OBJCFLAGS $QEMU_OBJCFLAGS \
      -o $TMPE $TMPM $QEMU_LDFLAGS
}

for flag in $gcc_flags; do
    if cc_has_warning_flag $flag ; then
        QEMU_CFLAGS="$QEMU_CFLAGS $flag"
    fi
    if objcc_has_warning_flag $flag ; then
        QEMU_OBJCFLAGS="$QEMU_OBJCFLAGS $flag"
    fi
done

if test "$stack_protector" != "no"; then
  cat > $TMPC << EOF
int main(int argc, char *argv[])
{
    char arr[64], *p = arr, *c = argv[argc - 1];
    while (*c) {
        *p++ = *c++;
    }
    return 0;
}
EOF
  gcc_flags="-fstack-protector-strong -fstack-protector-all"
  sp_on=0
  for flag in $gcc_flags; do
    # We need to check both a compile and a link, since some compiler
    # setups fail only on a .c->.o compile and some only at link time
    if compile_object "-Werror $flag" &&
       compile_prog "-Werror $flag" ""; then
      QEMU_CFLAGS="$QEMU_CFLAGS $flag"
      QEMU_LDFLAGS="$QEMU_LDFLAGS $flag"
      sp_on=1
      break
    fi
  done
  if test "$stack_protector" = yes; then
    if test $sp_on = 0; then
      error_exit "Stack protector not supported"
    fi
  fi
fi

# Disable -Wmissing-braces on older compilers that warn even for
# the "universal" C zero initializer {0}.
cat > $TMPC << EOF
struct {
  int a[2];
} x = {0};
EOF
if compile_object "-Werror" "" ; then
  :
else
  QEMU_CFLAGS="$QEMU_CFLAGS -Wno-missing-braces"
fi

# Our module code doesn't support Windows
if test "$modules" = "yes" && test "$mingw32" = "yes" ; then
  error_exit "Modules are not available for Windows"
fi

# Static linking is not possible with plugins, modules or PIE
if test "$static" = "yes" ; then
  if test "$modules" = "yes" ; then
    error_exit "static and modules are mutually incompatible"
  fi
  if test "$plugins" = "yes"; then
    error_exit "static and plugins are mutually incompatible"
  else
    plugins="no"
  fi
fi
test "$plugins" = "" && plugins=yes

cat > $TMPC << EOF

#ifdef __linux__
#  define THREAD __thread
#else
#  define THREAD
#endif
static THREAD int tls_var;
int main(void) { return tls_var; }
EOF

# Meson currently only handles pie as a boolean for now so if we have
# explicitly disabled PIE we need to extend our cflags because it wont.
if test "$static" = "yes"; then
  if test "$pie" != "no" && compile_prog "-Werror -fPIE -DPIE" "-static-pie"; then
    CONFIGURE_CFLAGS="-fPIE -DPIE $CONFIGURE_CFLAGS"
    pie="yes"
  elif test "$pie" = "yes"; then
    error_exit "-static-pie not available due to missing toolchain support"
  else
    pie="no"
    QEMU_CFLAGS="-fno-pie -no-pie $QEMU_CFLAGS"
  fi
elif test "$pie" = "no"; then
  if compile_prog "-Werror -fno-pie" "-no-pie"; then
    CONFIGURE_CFLAGS="-fno-pie $CONFIGURE_CFLAGS"
    CONFIGURE_LDFLAGS="-no-pie $CONFIGURE_LDFLAGS"
    QEMU_CFLAGS="-fno-pie -no-pie $QEMU_CFLAGS"
  fi
elif compile_prog "-Werror -fPIE -DPIE" "-pie"; then
  CONFIGURE_CFLAGS="-fPIE -DPIE $CONFIGURE_CFLAGS"
  CONFIGURE_LDFLAGS="-pie $CONFIGURE_LDFLAGS"
  pie="yes"
elif test "$pie" = "yes"; then
  error_exit "PIE not available due to missing toolchain support"
else
  echo "Disabling PIE due to missing toolchain support"
  pie="no"
fi

##########################################
# __sync_fetch_and_and requires at least -march=i486. Many toolchains
# use i686 as default anyway, but for those that don't, an explicit
# specification is necessary

if test "$cpu" = "i386"; then
  cat > $TMPC << EOF
static int sfaa(int *ptr)
{
  return __sync_fetch_and_and(ptr, 0);
}

int main(void)
{
  int val = 42;
  val = __sync_val_compare_and_swap(&val, 0, 1);
  sfaa(&val);
  return val;
}
EOF
  if ! compile_prog "" "" ; then
    QEMU_CFLAGS="-march=i486 $QEMU_CFLAGS"
  fi
fi

if test -z "${target_list+xxx}" ; then
    default_targets=yes
    for target in $default_target_list; do
        target_list="$target_list $target"
    done
    target_list="${target_list# }"
else
    default_targets=no
    target_list=$(echo "$target_list" | sed -e 's/,/ /g')
    for target in $target_list; do
        # Check that we recognised the target name; this allows a more
        # friendly error message than if we let it fall through.
        case " $default_target_list " in
            *" $target "*)
                ;;
            *)
                error_exit "Unknown target name '$target'"
                ;;
        esac
    done
fi

# see if system emulation was really requested
case " $target_list " in
  *"-softmmu "*) softmmu=yes
  ;;
  *) softmmu=no
  ;;
esac

if test "$tcg" = "auto"; then
  if test -z "$target_list"; then
    tcg="disabled"
  else
    tcg="enabled"
  fi
fi

if test "$tcg" = "enabled"; then
    git_submodules="$git_submodules tests/fp/berkeley-testfloat-3"
    git_submodules="$git_submodules tests/fp/berkeley-softfloat-3"
fi

##########################################
# big/little endian test
cat > $TMPC << EOF
#if defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
# error LITTLE
#endif
int main(void) { return 0; }
EOF

if ! compile_prog ; then
  bigendian="no"
else
  cat > $TMPC << EOF
#if defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
# error BIG
#endif
int main(void) { return 0; }
EOF

  if ! compile_prog ; then
    bigendian="yes"
  else
    echo big/little test failed
    exit 1
  fi
fi

##########################################
# pkg-config probe

if ! has "$pkg_config_exe"; then
  error_exit "pkg-config binary '$pkg_config_exe' not found"
fi

##########################################
# glib support probe

# When bumping glib_req_ver, please check also whether we should increase
# the _WIN32_WINNT setting in osdep.h according to the value from glib
glib_req_ver=2.56
glib_modules=gthread-2.0
if test "$modules" = yes; then
    glib_modules="$glib_modules gmodule-export-2.0"
elif test "$plugins" = "yes"; then
    glib_modules="$glib_modules gmodule-no-export-2.0"
fi

for i in $glib_modules; do
    if $pkg_config --atleast-version=$glib_req_ver $i; then
        glib_cflags=$($pkg_config --cflags $i)
        glib_libs=$($pkg_config --libs $i)
    else
        error_exit "glib-$glib_req_ver $i is required to compile QEMU"
    fi
done

glib_bindir="$($pkg_config --variable=bindir glib-2.0)"
if test -z "$glib_bindir" ; then
	glib_bindir="$($pkg_config --variable=prefix glib-2.0)"/bin
fi

# This workaround is required due to a bug in pkg-config file for glib as it
# doesn't define GLIB_STATIC_COMPILATION for pkg-config --static

if test "$static" = yes && test "$mingw32" = yes; then
    glib_cflags="-DGLIB_STATIC_COMPILATION $glib_cflags"
fi

# Sanity check that the current size_t matches the
# size that glib thinks it should be. This catches
# problems on multi-arch where people try to build
# 32-bit QEMU while pointing at 64-bit glib headers
cat > $TMPC <<EOF
#include <glib.h>
#include <unistd.h>

#define QEMU_BUILD_BUG_ON(x) \
  typedef char qemu_build_bug_on[(x)?-1:1] __attribute__((unused));

int main(void) {
   QEMU_BUILD_BUG_ON(sizeof(size_t) != GLIB_SIZEOF_SIZE_T);
   return 0;
}
EOF

if ! compile_prog "$glib_cflags" "$glib_libs" ; then
    error_exit "sizeof(size_t) doesn't match GLIB_SIZEOF_SIZE_T."\
               "You probably need to set PKG_CONFIG_LIBDIR"\
	       "to point to the right pkg-config files for your"\
	       "build target"
fi

# Silence clang warnings triggered by glib < 2.57.2
cat > $TMPC << EOF
#include <glib.h>
typedef struct Foo {
    int i;
} Foo;
static void foo_free(Foo *f)
{
    g_free(f);
}
G_DEFINE_AUTOPTR_CLEANUP_FUNC(Foo, foo_free)
int main(void) { return 0; }
EOF
if ! compile_prog "$glib_cflags -Werror" "$glib_libs" ; then
    if cc_has_warning_flag "-Wno-unused-function"; then
        glib_cflags="$glib_cflags -Wno-unused-function"
        CONFIGURE_CFLAGS="$CONFIGURE_CFLAGS -Wno-unused-function"
    fi
fi

##########################################
# fdt probe

case "$fdt" in
  auto | enabled | internal)
    # Simpler to always update submodule, even if not needed.
    git_submodules="${git_submodules} dtc"
    ;;
esac

##########################################
# check and set a backend for coroutine

# We prefer ucontext, but it's not always possible. The fallback
# is sigcontext. On Windows the only valid backend is the Windows
# specific one.

ucontext_works=no
if test "$darwin" != "yes"; then
  cat > $TMPC << EOF
#include <ucontext.h>
#ifdef __stub_makecontext
#error Ignoring glibc stub makecontext which will always fail
#endif
int main(void) { makecontext(0, 0, 0); return 0; }
EOF
  if compile_prog "" "" ; then
    ucontext_works=yes
  fi
fi

if test "$coroutine" = ""; then
  if test "$mingw32" = "yes"; then
    coroutine=win32
  elif test "$ucontext_works" = "yes"; then
    coroutine=ucontext
  else
    coroutine=sigaltstack
  fi
else
  case $coroutine in
  windows)
    if test "$mingw32" != "yes"; then
      error_exit "'windows' coroutine backend only valid for Windows"
    fi
    # Unfortunately the user visible backend name doesn't match the
    # coroutine-*.c filename for this case, so we have to adjust it here.
    coroutine=win32
    ;;
  ucontext)
    if test "$ucontext_works" != "yes"; then
      error_exit "'ucontext' backend requested but makecontext not available"
    fi
    ;;
  sigaltstack)
    if test "$mingw32" = "yes"; then
      error_exit "only the 'windows' coroutine backend is valid for Windows"
    fi
    ;;
  *)
    error_exit "unknown coroutine backend $coroutine"
    ;;
  esac
fi

##################################################
# SafeStack


if test "$safe_stack" = "yes"; then
cat > $TMPC << EOF
int main(void)
{
#if ! __has_feature(safe_stack)
#error SafeStack Disabled
#endif
    return 0;
}
EOF
  flag="-fsanitize=safe-stack"
  # Check that safe-stack is supported and enabled.
  if compile_prog "-Werror $flag" "$flag"; then
    # Flag needed both at compilation and at linking
    QEMU_CFLAGS="$QEMU_CFLAGS $flag"
    QEMU_LDFLAGS="$QEMU_LDFLAGS $flag"
  else
    error_exit "SafeStack not supported by your compiler"
  fi
  if test "$coroutine" != "ucontext"; then
    error_exit "SafeStack is only supported by the coroutine backend ucontext"
  fi
else
cat > $TMPC << EOF
int main(void)
{
#if defined(__has_feature)
#if __has_feature(safe_stack)
#error SafeStack Enabled
#endif
#endif
    return 0;
}
EOF
if test "$safe_stack" = "no"; then
  # Make sure that safe-stack is disabled
  if ! compile_prog "-Werror" ""; then
    # SafeStack was already enabled, try to explicitly remove the feature
    flag="-fno-sanitize=safe-stack"
    if ! compile_prog "-Werror $flag" "$flag"; then
      error_exit "Configure cannot disable SafeStack"
    fi
    QEMU_CFLAGS="$QEMU_CFLAGS $flag"
    QEMU_LDFLAGS="$QEMU_LDFLAGS $flag"
  fi
else # "$safe_stack" = ""
  # Set safe_stack to yes or no based on pre-existing flags
  if compile_prog "-Werror" ""; then
    safe_stack="no"
  else
    safe_stack="yes"
    if test "$coroutine" != "ucontext"; then
      error_exit "SafeStack is only supported by the coroutine backend ucontext"
    fi
  fi
fi
fi

########################################
# check if ccache is interfering with
# semantic analysis of macros

unset CCACHE_CPP2
ccache_cpp2=no
cat > $TMPC << EOF
static const int Z = 1;
#define fn() ({ Z; })
#define TAUT(X) ((X) == Z)
#define PAREN(X, Y) (X == Y)
#define ID(X) (X)
int main(void)
{
    int x = 0, y = 0;
    x = ID(x);
    x = fn();
    fn();
    if (PAREN(x, y)) return 0;
    if (TAUT(Z)) return 0;
    return 0;
}
EOF

if ! compile_object "-Werror"; then
    ccache_cpp2=yes
fi

#################################################
# clang does not support glibc + FORTIFY_SOURCE.

if test "$fortify_source" != "no"; then
  if echo | $cc -dM -E - | grep __clang__ > /dev/null 2>&1 ; then
    fortify_source="no";
  elif test -n "$cxx" && has $cxx &&
       echo | $cxx -dM -E - | grep __clang__ >/dev/null 2>&1 ; then
    fortify_source="no";
  else
    fortify_source="yes"
  fi
fi

##########################################
# checks for sanitizers

have_asan=no
have_ubsan=no
have_asan_iface_h=no
have_asan_iface_fiber=no

if test "$sanitizers" = "yes" ; then
  write_c_skeleton
  if compile_prog "$CPU_CFLAGS -Werror -fsanitize=address" ""; then
      have_asan=yes
  fi

  # we could use a simple skeleton for flags checks, but this also
  # detect the static linking issue of ubsan, see also:
  # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84285
  cat > $TMPC << EOF
#include <stdlib.h>
int main(void) {
    void *tmp = malloc(10);
    if (tmp != NULL) {
        return *(int *)(tmp + 2);
    }
    return 1;
}
EOF
  if compile_prog "$CPU_CFLAGS -Werror -fsanitize=undefined" ""; then
      have_ubsan=yes
  fi

  if check_include "sanitizer/asan_interface.h" ; then
      have_asan_iface_h=yes
  fi

  cat > $TMPC << EOF
#include <sanitizer/asan_interface.h>
int main(void) {
  __sanitizer_start_switch_fiber(0, 0, 0);
  return 0;
}
EOF
  if compile_prog "$CPU_CFLAGS -Werror -fsanitize=address" "" ; then
      have_asan_iface_fiber=yes
  fi
fi

# Thread sanitizer is, for now, much noisier than the other sanitizers;
# keep it separate until that is not the case.
if test "$tsan" = "yes" && test "$sanitizers" = "yes"; then
  error_exit "TSAN is not supported with other sanitiziers."
fi
have_tsan=no
have_tsan_iface_fiber=no
if test "$tsan" = "yes" ; then
  write_c_skeleton
  if compile_prog "$CPU_CFLAGS -Werror -fsanitize=thread" "" ; then
      have_tsan=yes
  fi
  cat > $TMPC << EOF
#include <sanitizer/tsan_interface.h>
int main(void) {
  __tsan_create_fiber(0);
  return 0;
}
EOF
  if compile_prog "$CPU_CFLAGS -Werror -fsanitize=thread" "" ; then
      have_tsan_iface_fiber=yes
  fi
fi

##########################################
# functions to probe cross compilers

container="no"
if test $use_containers = "yes" && (has "docker" || has "podman"); then
    case $($python "$source_path"/tests/docker/docker.py probe) in
        *docker) container=docker ;;
        podman) container=podman ;;
        no) container=no ;;
    esac
    if test "$container" != "no"; then
        docker_py="$python $source_path/tests/docker/docker.py --engine $container"
    fi
fi

# cross compilers defaults, can be overridden with --cross-cc-ARCH
: ${cross_prefix_aarch64="aarch64-linux-gnu-"}
: ${cross_prefix_aarch64_be="$cross_prefix_aarch64"}
: ${cross_prefix_alpha="alpha-linux-gnu-"}
: ${cross_prefix_arm="arm-linux-gnueabihf-"}
: ${cross_prefix_armeb="$cross_prefix_arm"}
: ${cross_prefix_hexagon="hexagon-unknown-linux-musl-"}
: ${cross_prefix_loongarch64="loongarch64-unknown-linux-gnu-"}
: ${cross_prefix_hppa="hppa-linux-gnu-"}
: ${cross_prefix_i386="i686-linux-gnu-"}
: ${cross_prefix_m68k="m68k-linux-gnu-"}
: ${cross_prefix_microblaze="microblaze-linux-musl-"}
: ${cross_prefix_mips64el="mips64el-linux-gnuabi64-"}
: ${cross_prefix_mips64="mips64-linux-gnuabi64-"}
: ${cross_prefix_mipsel="mipsel-linux-gnu-"}
: ${cross_prefix_mips="mips-linux-gnu-"}
: ${cross_prefix_nios2="nios2-linux-gnu-"}
: ${cross_prefix_ppc="powerpc-linux-gnu-"}
: ${cross_prefix_ppc64="powerpc64-linux-gnu-"}
: ${cross_prefix_ppc64le="$cross_prefix_ppc64"}
: ${cross_prefix_riscv64="riscv64-linux-gnu-"}
: ${cross_prefix_s390x="s390x-linux-gnu-"}
: ${cross_prefix_sh4="sh4-linux-gnu-"}
: ${cross_prefix_sparc64="sparc64-linux-gnu-"}
: ${cross_prefix_sparc="$cross_prefix_sparc64"}
: ${cross_prefix_x86_64="x86_64-linux-gnu-"}

: ${cross_cc_aarch64_be="$cross_cc_aarch64"}
: ${cross_cc_cflags_aarch64_be="-mbig-endian"}
: ${cross_cc_armeb="$cross_cc_arm"}
: ${cross_cc_cflags_armeb="-mbig-endian"}
: ${cross_cc_hexagon="hexagon-unknown-linux-musl-clang"}
: ${cross_cc_cflags_hexagon="-mv67 -O2 -static"}
: ${cross_cc_cflags_i386="-m32"}
: ${cross_cc_cflags_ppc="-m32 -mbig-endian"}
: ${cross_cc_cflags_ppc64="-m64 -mbig-endian"}
: ${cross_cc_ppc64le="$cross_cc_ppc64"}
: ${cross_cc_cflags_ppc64le="-m64 -mlittle-endian"}
: ${cross_cc_cflags_sparc64="-m64 -mcpu=ultrasparc"}
: ${cross_cc_sparc="$cross_cc_sparc64"}
: ${cross_cc_cflags_sparc="-m32 -mcpu=supersparc"}
: ${cross_cc_cflags_x86_64="-m64"}

compute_target_variable() {
  eval "$2="
  if eval test -n "\"\${cross_prefix_$1}\""; then
    if eval has "\"\${cross_prefix_$1}\$3\""; then
      eval "$2=\"\${cross_prefix_$1}\$3\""
    fi
  fi
}

have_target() {
  for i; do
    case " $target_list " in
      *" $i "*) return 0;;
      *) ;;
    esac
  done
  return 1
}

# probe_target_compiler TARGET
#
# Look for a compiler for the given target, either native or cross.
# Set variables target_* if a compiler is found, and container_cross_*
# if a Docker-based cross-compiler image is known for the target.
# Set got_cross_cc to yes/no depending on whether a non-container-based
# compiler was found.
#
# If TARGET is a user-mode emulation target, also set build_static to
# "y" if static linking is possible.
#
probe_target_compiler() {
  # reset all output variables
  got_cross_cc=no
  container_image=
  container_hosts=
  container_cross_cc=
  container_cross_ar=
  container_cross_as=
  container_cross_ld=
  container_cross_nm=
  container_cross_objcopy=
  container_cross_ranlib=
  container_cross_strip=

  # We shall skip configuring the target compiler if the user didn't
  # bother enabling an appropriate guest. This avoids building
  # extraneous firmware images and tests.
  if test "${target_list#*$1}" = "$1"; then
      return 1
  fi

  target_arch=${1%%-*}
  case $target_arch in
    aarch64) container_hosts="x86_64 aarch64" ;;
    alpha) container_hosts=x86_64 ;;
    arm) container_hosts="x86_64 aarch64" ;;
    cris) container_hosts=x86_64 ;;
    hexagon) container_hosts=x86_64 ;;
    hppa) container_hosts=x86_64 ;;
    i386) container_hosts=x86_64 ;;
    loongarch64) container_hosts=x86_64 ;;
    m68k) container_hosts=x86_64 ;;
    microblaze) container_hosts=x86_64 ;;
    mips64el) container_hosts=x86_64 ;;
    mips64) container_hosts=x86_64 ;;
    mipsel) container_hosts=x86_64 ;;
    mips) container_hosts=x86_64 ;;
    nios2) container_hosts=x86_64 ;;
    ppc) container_hosts=x86_64 ;;
    ppc64|ppc64le) container_hosts=x86_64 ;;
    riscv64) container_hosts=x86_64 ;;
    s390x) container_hosts=x86_64 ;;
    sh4) container_hosts=x86_64 ;;
    sparc64) container_hosts=x86_64 ;;
    tricore) container_hosts=x86_64 ;;
    x86_64) container_hosts="aarch64 ppc64el x86_64" ;;
    xtensa*) container_hosts=x86_64 ;;
  esac

  for host in $container_hosts; do
    test "$container" != no || continue
    test "$host" = "$cpu" || continue
    case $target_arch in
      aarch64)
        # We don't have any bigendian build tools so we only use this for AArch64
        container_image=debian-arm64-cross
        container_cross_prefix=aarch64-linux-gnu-
        container_cross_cc=${container_cross_prefix}gcc-10
        ;;
      alpha)
        container_image=debian-alpha-cross
        container_cross_prefix=alpha-linux-gnu-
        ;;
      arm)
        # We don't have any bigendian build tools so we only use this for ARM
        container_image=debian-armhf-cross
        container_cross_prefix=arm-linux-gnueabihf-
        ;;
      cris)
        container_image=fedora-cris-cross
        container_cross_prefix=cris-linux-gnu-
        ;;
      hexagon)
        container_image=debian-hexagon-cross
        container_cross_prefix=hexagon-unknown-linux-musl-
        container_cross_cc=${container_cross_prefix}clang
        ;;
      hppa)
        container_image=debian-hppa-cross
        container_cross_prefix=hppa-linux-gnu-
        ;;
      i386)
        container_image=fedora-i386-cross
        container_cross_prefix=
        ;;
      loongarch64)
        container_image=debian-loongarch-cross
        container_cross_prefix=loongarch64-unknown-linux-gnu-
        ;;
      m68k)
        container_image=debian-m68k-cross
        container_cross_prefix=m68k-linux-gnu-
        ;;
      microblaze)
        container_image=debian-microblaze-cross
        container_cross_prefix=microblaze-linux-musl-
        ;;
      mips64el)
        container_image=debian-mips64el-cross
        container_cross_prefix=mips64el-linux-gnuabi64-
        ;;
      mips64)
        container_image=debian-mips64-cross
        container_cross_prefix=mips64-linux-gnuabi64-
        ;;
      mipsel)
        container_image=debian-mipsel-cross
        container_cross_prefix=mipsel-linux-gnu-
        ;;
      mips)
        container_image=debian-mips-cross
        container_cross_prefix=mips-linux-gnu-
        ;;
      nios2)
        container_image=debian-nios2-cross
        container_cross_prefix=nios2-linux-gnu-
        ;;
      ppc)
        container_image=debian-powerpc-test-cross
        container_cross_prefix=powerpc-linux-gnu-
        container_cross_cc=${container_cross_prefix}gcc-10
        ;;
      ppc64|ppc64le)
        container_image=debian-powerpc-test-cross
        container_cross_prefix=powerpc${target_arch#ppc}-linux-gnu-
        container_cross_cc=${container_cross_prefix}gcc-10
        ;;
      riscv64)
        container_image=debian-riscv64-test-cross
        container_cross_prefix=riscv64-linux-gnu-
        ;;
      s390x)
        container_image=debian-s390x-cross
        container_cross_prefix=s390x-linux-gnu-
        ;;
      sh4)
        container_image=debian-sh4-cross
        container_cross_prefix=sh4-linux-gnu-
        ;;
      sparc64)
        container_image=debian-sparc64-cross
        container_cross_prefix=sparc64-linux-gnu-
        ;;
      tricore)
        container_image=debian-tricore-cross
        container_cross_prefix=tricore-
        container_cross_as=tricore-as
        container_cross_ld=tricore-ld
        break
        ;;
      x86_64)
        container_image=debian-amd64-cross
        container_cross_prefix=x86_64-linux-gnu-
        ;;
      xtensa*)
        container_hosts=x86_64
        container_image=debian-xtensa-cross

        # default to the dc232b cpu
        container_cross_prefix=/opt/2020.07/xtensa-dc232b-elf/bin/xtensa-dc232b-elf-
        ;;
    esac
    : ${container_cross_cc:=${container_cross_prefix}gcc}
    : ${container_cross_ar:=${container_cross_prefix}ar}
    : ${container_cross_as:=${container_cross_prefix}as}
    : ${container_cross_ld:=${container_cross_prefix}ld}
    : ${container_cross_nm:=${container_cross_prefix}nm}
    : ${container_cross_objcopy:=${container_cross_prefix}objcopy}
    : ${container_cross_ranlib:=${container_cross_prefix}ranlib}
    : ${container_cross_strip:=${container_cross_prefix}strip}
  done

  try=cross
  case "$target_arch:$cpu" in
    aarch64_be:aarch64 | \
    armeb:arm | \
    i386:x86_64 | \
    mips*:mips64 | \
    ppc*:ppc64 | \
    sparc:sparc64 | \
    "$cpu:$cpu")
      try='native cross' ;;
  esac
  eval "target_cflags=\${cross_cc_cflags_$target_arch}"
  for thistry in $try; do
    case $thistry in
    native)
      target_cc=$cc
      target_ccas=$ccas
      target_ar=$ar
      target_as=$as
      target_ld=$ld
      target_nm=$nm
      target_objcopy=$objcopy
      target_ranlib=$ranlib
      target_strip=$strip
      ;;
    cross)
      target_cc=
      if eval test -n "\"\${cross_cc_$target_arch}\""; then
        if eval has "\"\${cross_cc_$target_arch}\""; then
          eval "target_cc=\"\${cross_cc_$target_arch}\""
        fi
      else
        compute_target_variable $target_arch target_cc gcc
      fi
      target_ccas=$target_cc
      compute_target_variable $target_arch target_ar ar
      compute_target_variable $target_arch target_as as
      compute_target_variable $target_arch target_ld ld
      compute_target_variable $target_arch target_nm nm
      compute_target_variable $target_arch target_objcopy objcopy
      compute_target_variable $target_arch target_ranlib ranlib
      compute_target_variable $target_arch target_strip strip
      ;;
    esac

    if test -n "$target_cc"; then
      case $target_arch in
        i386|x86_64)
          if $target_cc --version | grep -qi "clang"; then
            continue
          fi
          ;;
      esac
    elif test -n "$target_as" && test -n "$target_ld"; then
      # Special handling for assembler only targets
      case $target in
        tricore-softmmu)
          build_static=
          got_cross_cc=yes
          break
          ;;
        *)
          continue
          ;;
      esac
    else
      continue
    fi

    write_c_skeleton
    case $1 in
      *-softmmu)
        if do_compiler "$target_cc" $target_cflags -o $TMPO -c $TMPC &&
          do_compiler "$target_cc" $target_cflags -r -nostdlib -o "${TMPDIR1}/${TMPB}2.o" "$TMPO" -lgcc; then
          got_cross_cc=yes
          break
        fi
        ;;
      *)
        if do_compiler "$target_cc" $target_cflags -o $TMPE $TMPC -static ; then
          build_static=y
          got_cross_cc=yes
          break
        fi
        if do_compiler "$target_cc" $target_cflags -o $TMPE $TMPC ; then
          build_static=
          got_cross_cc=yes
          break
        fi
        ;;
    esac
  done
  if test $got_cross_cc != yes; then
    build_static=
    target_cc=
    target_ccas=
    target_ar=
    target_as=
    target_ld=
    target_nm=
    target_objcopy=
    target_ranlib=
    target_strip=
  fi
  test -n "$target_cc"
}

write_target_makefile() {
  echo "EXTRA_CFLAGS=$target_cflags"
  if test -z "$target_cc" && test -z "$target_as"; then
    test -z "$container_image" && error_exit "Internal error: could not find cross compiler for $1?"
    echo "$1: docker-image-$container_image" >> Makefile.prereqs
    if test -n "$container_cross_cc"; then
      echo "CC=$docker_py cc --cc $container_cross_cc -i qemu/$container_image -s $source_path --"
      echo "CCAS=$docker_py cc --cc $container_cross_cc -i qemu/$container_image -s $source_path --"
    fi
    echo "AR=$docker_py cc --cc $container_cross_ar -i qemu/$container_image -s $source_path --"
    echo "AS=$docker_py cc --cc $container_cross_as -i qemu/$container_image -s $source_path --"
    echo "LD=$docker_py cc --cc $container_cross_ld -i qemu/$container_image -s $source_path --"
    echo "NM=$docker_py cc --cc $container_cross_nm -i qemu/$container_image -s $source_path --"
    echo "OBJCOPY=$docker_py cc --cc $container_cross_objcopy -i qemu/$container_image -s $source_path --"
    echo "RANLIB=$docker_py cc --cc $container_cross_ranlib -i qemu/$container_image -s $source_path --"
    echo "STRIP=$docker_py cc --cc $container_cross_strip -i qemu/$container_image -s $source_path --"
  else
    if test -n "$target_cc"; then
      echo "CC=$target_cc"
      echo "CCAS=$target_ccas"
    fi
    if test -n "$target_ar"; then
      echo "AR=$target_ar"
    fi
    if test -n "$target_as"; then
      echo "AS=$target_as"
    fi
    if test -n "$target_ld"; then
      echo "LD=$target_ld"
    fi
    if test -n "$target_nm"; then
      echo "NM=$target_nm"
    fi
    if test -n "$target_objcopy"; then
      echo "OBJCOPY=$target_objcopy"
    fi
    if test -n "$target_ranlib"; then
      echo "RANLIB=$target_ranlib"
    fi
    if test -n "$target_strip"; then
      echo "STRIP=$target_strip"
    fi
  fi
}

##########################################
# check for vfio_user_server

case "$vfio_user_server" in
  enabled )
    if test "$git_submodules_action" != "ignore"; then
      git_submodules="${git_submodules} subprojects/libvfio-user"
    fi
    ;;
esac

##########################################
# End of CC checks
# After here, no more $cc or $ld runs

write_c_skeleton

if test "$fortify_source" = "yes" ; then
  QEMU_CFLAGS="-U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 $QEMU_CFLAGS"
fi

if test "$have_asan" = "yes"; then
  QEMU_CFLAGS="-fsanitize=address $QEMU_CFLAGS"
  QEMU_LDFLAGS="-fsanitize=address $QEMU_LDFLAGS"
  if test "$have_asan_iface_h" = "no" ; then
      echo "ASAN build enabled, but ASAN header missing." \
           "Without code annotation, the report may be inferior."
  elif test "$have_asan_iface_fiber" = "no" ; then
      echo "ASAN build enabled, but ASAN header is too old." \
           "Without code annotation, the report may be inferior."
  fi
fi
if test "$have_tsan" = "yes" ; then
  if test "$have_tsan_iface_fiber" = "yes" ; then
    QEMU_CFLAGS="-fsanitize=thread $QEMU_CFLAGS"
    QEMU_LDFLAGS="-fsanitize=thread $QEMU_LDFLAGS"
  else
    error_exit "Cannot enable TSAN due to missing fiber annotation interface."
  fi
elif test "$tsan" = "yes" ; then
  error_exit "Cannot enable TSAN due to missing sanitize thread interface."
fi
if test "$have_ubsan" = "yes"; then
  QEMU_CFLAGS="-fsanitize=undefined $QEMU_CFLAGS"
  QEMU_LDFLAGS="-fsanitize=undefined $QEMU_LDFLAGS"
fi

#######################################
# cross-compiled firmware targets

# Set up build tree symlinks that point back into the source tree
# (these can be both files and directories).
# Caution: avoid adding files or directories here using wildcards. This
# will result in problems later if a new file matching the wildcard is
# added to the source tree -- nothing will cause configure to be rerun
# so the build tree will be missing the link back to the new file, and
# tests might fail. Prefer to keep the relevant files in their own
# directory and symlink the directory instead.
LINKS="Makefile"
LINKS="$LINKS pc-bios/optionrom/Makefile"
LINKS="$LINKS pc-bios/s390-ccw/Makefile"
LINKS="$LINKS pc-bios/vof/Makefile"
LINKS="$LINKS .gdbinit scripts" # scripts needed by relative path in .gdbinit
LINKS="$LINKS tests/avocado tests/data"
LINKS="$LINKS tests/qemu-iotests/check"
LINKS="$LINKS python"
LINKS="$LINKS contrib/plugins/Makefile "
for f in $LINKS ; do
    if [ -e "$source_path/$f" ]; then
        mkdir -p "$(dirname ./"$f")"
        symlink "$source_path/$f" "$f"
    fi
done

echo "# Automatically generated by configure - do not modify" > Makefile.prereqs

# Mac OS X ships with a broken assembler
roms=
if have_target i386-softmmu x86_64-softmmu && \
        test "$targetos" != "darwin" && test "$targetos" != "sunos" && \
        test "$targetos" != "haiku" && \
        probe_target_compiler i386-softmmu; then
    roms="pc-bios/optionrom"
    config_mak=pc-bios/optionrom/config.mak
    echo "# Automatically generated by configure - do not modify" > $config_mak
    echo "TOPSRC_DIR=$source_path" >> $config_mak
    write_target_makefile >> $config_mak
fi

if have_target ppc-softmmu ppc64-softmmu && \
        probe_target_compiler ppc-softmmu; then
    roms="$roms pc-bios/vof"
    config_mak=pc-bios/vof/config.mak
    echo "# Automatically generated by configure - do not modify" > $config_mak
    echo "SRC_DIR=$source_path/pc-bios/vof" >> $config_mak
    write_target_makefile >> $config_mak
fi

# Only build s390-ccw bios if the compiler has -march=z900 or -march=z10
# (which is the lowest architecture level that Clang supports)
if have_target s390x-softmmu && probe_target_compiler s390x-softmmu; then
  write_c_skeleton
  do_compiler "$target_cc" $target_cc_cflags -march=z900 -o $TMPO -c $TMPC
  has_z900=$?
  if [ $has_z900 = 0 ] || do_compiler "$target_cc" $target_cc_cflags -march=z10 -msoft-float -Werror -o $TMPO -c $TMPC; then
    if [ $has_z900 != 0 ]; then
      echo "WARNING: Your compiler does not support the z900!"
      echo "         The s390-ccw bios will only work with guest CPUs >= z10."
    fi
    roms="$roms pc-bios/s390-ccw"
    config_mak=pc-bios/s390-ccw/config-host.mak
    echo "# Automatically generated by configure - do not modify" > $config_mak
    echo "SRC_PATH=$source_path/pc-bios/s390-ccw" >> $config_mak
    write_target_makefile >> $config_mak
    # SLOF is required for building the s390-ccw firmware on s390x,
    # since it is using the libnet code from SLOF for network booting.
    git_submodules="${git_submodules} roms/SLOF"
  fi
fi

#######################################
# generate config-host.mak

if ! (GIT="$git" "$source_path/scripts/git-submodule.sh" "$git_submodules_action" "$git_submodules"); then
    exit 1
fi

config_host_mak="config-host.mak"

echo "# Automatically generated by configure - do not modify" > $config_host_mak
echo >> $config_host_mak

echo all: >> $config_host_mak
echo "GIT=$git" >> $config_host_mak
echo "GIT_SUBMODULES=$git_submodules" >> $config_host_mak
echo "GIT_SUBMODULES_ACTION=$git_submodules_action" >> $config_host_mak

if test "$debug_tcg" = "yes" ; then
  echo "CONFIG_DEBUG_TCG=y" >> $config_host_mak
fi
if test "$mingw32" = "yes" ; then
  echo "CONFIG_WIN32=y" >> $config_host_mak
  echo "QEMU_GA_MANUFACTURER=${QEMU_GA_MANUFACTURER-QEMU}" >> $config_host_mak
  echo "QEMU_GA_DISTRO=${QEMU_GA_DISTRO-Linux}" >> $config_host_mak
  echo "QEMU_GA_VERSION=${QEMU_GA_VERSION-$(cat "$source_path"/VERSION)}" >> $config_host_mak
else
  echo "CONFIG_POSIX=y" >> $config_host_mak
fi

if test "$linux" = "yes" ; then
  echo "CONFIG_LINUX=y" >> $config_host_mak
fi

if test "$darwin" = "yes" ; then
  echo "CONFIG_DARWIN=y" >> $config_host_mak
fi

if test "$solaris" = "yes" ; then
  echo "CONFIG_SOLARIS=y" >> $config_host_mak
fi
if test "$static" = "yes" ; then
  echo "CONFIG_STATIC=y" >> $config_host_mak
fi
echo "SRC_PATH=$source_path" >> $config_host_mak
echo "TARGET_DIRS=$target_list" >> $config_host_mak
if test "$modules" = "yes"; then
  echo "CONFIG_MODULES=y" >> $config_host_mak
fi

# XXX: suppress that
if [ "$bsd" = "yes" ] ; then
  echo "CONFIG_BSD=y" >> $config_host_mak
fi

echo "CONFIG_COROUTINE_BACKEND=$coroutine" >> $config_host_mak

if test "$have_asan_iface_fiber" = "yes" ; then
    echo "CONFIG_ASAN_IFACE_FIBER=y" >> $config_host_mak
fi

if test "$have_tsan" = "yes" && test "$have_tsan_iface_fiber" = "yes" ; then
    echo "CONFIG_TSAN=y" >> $config_host_mak
fi

if test "$plugins" = "yes" ; then
    echo "CONFIG_PLUGIN=y" >> $config_host_mak
fi

if test -n "$gdb_bin"; then
    gdb_version=$($gdb_bin --version | head -n 1)
    if version_ge ${gdb_version##* } 9.1; then
        echo "HAVE_GDB_BIN=$gdb_bin" >> $config_host_mak
    else
        gdb_bin=""
    fi
fi

if test "$container" != no; then
    echo "ENGINE=$container" >> $config_host_mak
fi
echo "ROMS=$roms" >> $config_host_mak
echo "MAKE=$make" >> $config_host_mak
echo "PYTHON=$python" >> $config_host_mak
echo "GENISOIMAGE=$genisoimage" >> $config_host_mak
echo "MESON=$meson" >> $config_host_mak
echo "NINJA=$ninja" >> $config_host_mak
echo "CC=$cc" >> $config_host_mak
echo "QEMU_CFLAGS=$QEMU_CFLAGS" >> $config_host_mak
echo "QEMU_OBJCFLAGS=$QEMU_OBJCFLAGS" >> $config_host_mak
echo "GLIB_CFLAGS=$glib_cflags" >> $config_host_mak
echo "GLIB_LIBS=$glib_libs" >> $config_host_mak
echo "GLIB_BINDIR=$glib_bindir" >> $config_host_mak
echo "GLIB_VERSION=$($pkg_config --modversion glib-2.0)" >> $config_host_mak
echo "QEMU_LDFLAGS=$QEMU_LDFLAGS" >> $config_host_mak
echo "EXESUF=$EXESUF" >> $config_host_mak

# use included Linux headers
if test "$linux" = "yes" ; then
  mkdir -p linux-headers
  case "$cpu" in
  i386|x86_64)
    linux_arch=x86
    ;;
  ppc|ppc64)
    linux_arch=powerpc
    ;;
  s390x)
    linux_arch=s390
    ;;
  aarch64)
    linux_arch=arm64
    ;;
  loongarch*)
    linux_arch=loongarch
    ;;
  mips64)
    linux_arch=mips
    ;;
  *)
    # For most CPUs the kernel architecture name and QEMU CPU name match.
    linux_arch="$cpu"
    ;;
  esac
    # For non-KVM architectures we will not have asm headers
    if [ -e "$source_path/linux-headers/asm-$linux_arch" ]; then
      symlink "$source_path/linux-headers/asm-$linux_arch" linux-headers/asm
    fi
fi

for target in $target_list; do
    target_dir="$target"
    target_name=$(echo $target | cut -d '-' -f 1)$EXESUF
    mkdir -p "$target_dir"
    case $target in
        *-user) symlink "../qemu-$target_name" "$target_dir/qemu-$target_name" ;;
        *) symlink "../qemu-system-$target_name" "$target_dir/qemu-system-$target_name" ;;
    esac
done

if test "$default_targets" = "yes"; then
  echo "CONFIG_DEFAULT_TARGETS=y" >> $config_host_mak
fi

if test "$ccache_cpp2" = "yes"; then
  echo "export CCACHE_CPP2=y" >> $config_host_mak
fi

if test "$safe_stack" = "yes"; then
  echo "CONFIG_SAFESTACK=y" >> $config_host_mak
fi

# tests/tcg configuration
(config_host_mak=tests/tcg/config-host.mak
mkdir -p tests/tcg
echo "# Automatically generated by configure - do not modify" > $config_host_mak
echo "SRC_PATH=$source_path" >> $config_host_mak
echo "HOST_CC=$host_cc" >> $config_host_mak

# versioned checked in the main config_host.mak above
if test -n "$gdb_bin"; then
    echo "HAVE_GDB_BIN=$gdb_bin" >> $config_host_mak
fi
if test "$plugins" = "yes" ; then
    echo "CONFIG_PLUGIN=y" >> $config_host_mak
fi

tcg_tests_targets=
for target in $target_list; do
  arch=${target%%-*}

  case $target in
    xtensa*-linux-user)
      # the toolchain is not complete with headers, only build softmmu tests
      continue
      ;;
    *-softmmu)
      test -f "$source_path/tests/tcg/$arch/Makefile.softmmu-target" || continue
      qemu="qemu-system-$arch"
      ;;
    *-linux-user|*-bsd-user)
      qemu="qemu-$arch"
      ;;
  esac

  if probe_target_compiler $target || test -n "$container_image"; then
      test -n "$container_image" && build_static=y
      mkdir -p "tests/tcg/$target"
      config_target_mak=tests/tcg/$target/config-target.mak
      ln -sf "$source_path/tests/tcg/Makefile.target" "tests/tcg/$target/Makefile"
      echo "# Automatically generated by configure - do not modify" > "$config_target_mak"
      echo "TARGET_NAME=$arch" >> "$config_target_mak"
      echo "TARGET=$target" >> "$config_target_mak"
      write_target_makefile "build-tcg-tests-$target" >> "$config_target_mak"
      echo "BUILD_STATIC=$build_static" >> "$config_target_mak"
      echo "QEMU=$PWD/$qemu" >> "$config_target_mak"
      echo "run-tcg-tests-$target: $qemu\$(EXESUF)" >> Makefile.prereqs
      tcg_tests_targets="$tcg_tests_targets $target"
  fi
done
echo "TCG_TESTS_TARGETS=$tcg_tests_targets" >> config-host.mak)

if test "$skip_meson" = no; then
  cross="config-meson.cross.new"
  meson_quote() {
    test $# = 0 && return
    echo "'$(echo $* | sed "s/ /','/g")'"
  }

  echo "# Automatically generated by configure - do not modify" > $cross
  echo "[properties]" >> $cross

  # unroll any custom device configs
  for a in $device_archs; do
      eval "c=\$devices_${a}"
      echo "${a}-softmmu = '$c'" >> $cross
  done

  echo "[built-in options]" >> $cross
  echo "c_args = [$(meson_quote $CFLAGS $EXTRA_CFLAGS)]" >> $cross
  echo "cpp_args = [$(meson_quote $CXXFLAGS $EXTRA_CXXFLAGS)]" >> $cross
  test -n "$objcc" && echo "objc_args = [$(meson_quote $OBJCFLAGS $EXTRA_OBJCFLAGS)]" >> $cross
  echo "c_link_args = [$(meson_quote $CFLAGS $LDFLAGS $EXTRA_CFLAGS $EXTRA_LDFLAGS)]" >> $cross
  echo "cpp_link_args = [$(meson_quote $CXXFLAGS $LDFLAGS $EXTRA_CXXFLAGS $EXTRA_LDFLAGS)]" >> $cross
  echo "[binaries]" >> $cross
  echo "c = [$(meson_quote $cc $CPU_CFLAGS)]" >> $cross
  test -n "$cxx" && echo "cpp = [$(meson_quote $cxx $CPU_CFLAGS)]" >> $cross
  test -n "$objcc" && echo "objc = [$(meson_quote $objcc $CPU_CFLAGS)]" >> $cross
  echo "ar = [$(meson_quote $ar)]" >> $cross
  echo "nm = [$(meson_quote $nm)]" >> $cross
  echo "pkgconfig = [$(meson_quote $pkg_config_exe)]" >> $cross
  echo "ranlib = [$(meson_quote $ranlib)]" >> $cross
  if has $sdl2_config; then
    echo "sdl2-config = [$(meson_quote $sdl2_config)]" >> $cross
  fi
  echo "strip = [$(meson_quote $strip)]" >> $cross
  echo "widl = [$(meson_quote $widl)]" >> $cross
  echo "windres = [$(meson_quote $windres)]" >> $cross
  echo "windmc = [$(meson_quote $windmc)]" >> $cross
  if test "$cross_compile" = "yes"; then
    cross_arg="--cross-file config-meson.cross"
    echo "[host_machine]" >> $cross
    echo "system = '$targetos'" >> $cross
    case "$cpu" in
        i386)
            echo "cpu_family = 'x86'" >> $cross
            ;;
        *)
            echo "cpu_family = '$cpu'" >> $cross
            ;;
    esac
    echo "cpu = '$cpu'" >> $cross
    if test "$bigendian" = "yes" ; then
        echo "endian = 'big'" >> $cross
    else
        echo "endian = 'little'" >> $cross
    fi
  else
    cross_arg="--native-file config-meson.cross"
  fi
  mv $cross config-meson.cross

  rm -rf meson-private meson-info meson-logs

  # Built-in options
  test "$bindir" != "bin" && meson_option_add "-Dbindir=$bindir"
  test "$default_feature" = no && meson_option_add -Dauto_features=disabled
  test "$pie" = no && meson_option_add -Db_pie=false
  test "$werror" = yes && meson_option_add -Dwerror=true

  # QEMU options
  test "$cfi" != false && meson_option_add "-Dcfi=$cfi"
  test "$fdt" != auto && meson_option_add "-Dfdt=$fdt"
  test -n "${LIB_FUZZING_ENGINE+xxx}" && meson_option_add "-Dfuzzing_engine=$LIB_FUZZING_ENGINE"
  test "$qemu_suffix" != qemu && meson_option_add "-Dqemu_suffix=$qemu_suffix"
  test "$smbd" != '' && meson_option_add "-Dsmbd=$smbd"
  test "$tcg" != enabled && meson_option_add "-Dtcg=$tcg"
  test "$vfio_user_server" != auto && meson_option_add "-Dvfio_user_server=$vfio_user_server"
  run_meson() {
    NINJA=$ninja $meson setup --prefix "$prefix" "$@" $cross_arg "$PWD" "$source_path"
  }
  eval run_meson $meson_options
  if test "$?" -ne 0 ; then
      error_exit "meson setup failed"
  fi
fi

# Save the configure command line for later reuse.
cat <<EOD >config.status
#!/bin/sh
# Generated by configure.
# Run this file to recreate the current configuration.
# Compiler output produced by configure, useful for debugging
# configure, is in config.log if it exists.
EOD

preserve_env() {
    envname=$1

    eval envval=\$$envname

    if test -n "$envval"
    then
	echo "$envname='$envval'" >> config.status
	echo "export $envname" >> config.status
    else
	echo "unset $envname" >> config.status
    fi
}

# Preserve various env variables that influence what
# features/build target configure will detect
preserve_env AR
preserve_env AS
preserve_env CC
preserve_env CFLAGS
preserve_env CXX
preserve_env CXXFLAGS
preserve_env LD
preserve_env LDFLAGS
preserve_env LD_LIBRARY_PATH
preserve_env MAKE
preserve_env NM
preserve_env OBJCFLAGS
preserve_env OBJCOPY
preserve_env PATH
preserve_env PKG_CONFIG
preserve_env PKG_CONFIG_LIBDIR
preserve_env PKG_CONFIG_PATH
preserve_env PYTHON
preserve_env QEMU_GA_MANUFACTURER
preserve_env QEMU_GA_DISTRO
preserve_env QEMU_GA_VERSION
preserve_env SDL2_CONFIG
preserve_env SMBD
preserve_env STRIP
preserve_env WIDL
preserve_env WINDRES
preserve_env WINDMC

printf "exec" >>config.status
for i in "$0" "$@"; do
  test "$i" = --skip-meson || printf " %s" "$(quote_sh "$i")" >>config.status
done
echo ' "$@"' >>config.status
chmod +x config.status

rm -r "$TMPDIR1"