unicorn/qemu/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

# 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 "${TMPDIR1}"
mkdir -p "${TMPDIR1}"
if [ $? -ne 0 ]; then
    echo "ERROR: failed to create temporary directory"
    exit 1
fi

TMPB="qemu-conf"
TMPC="${TMPDIR1}/${TMPB}.c"
TMPO="${TMPDIR1}/${TMPB}.o"
TMPCXX="${TMPDIR1}/${TMPB}.cxx"
TMPE="${TMPDIR1}/${TMPB}.exe"
TMPMO="${TMPDIR1}/${TMPB}.mo"
TMPTXT="${TMPDIR1}/${TMPB}.txt"

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
printf " '%s'" "$0" "$@" >> config.log
echo >> config.log
echo "#" >> config.log

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.
    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 $?
    # Test passed. If this is an --enable-werror build, rerun
    # the test with -Werror and bail out if it fails. This
    # makes warning-generating-errors in configure test code
    # obvious to developers.
    if test "$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 "$cc" "$@"
}

do_cxx() {
    do_compiler "$cxx" "$@"
}

update_cxxflags() {
    # Set QEMU_CXXFLAGS from QEMU_CFLAGS by filtering out those
    # options which some versions of GCC's C++ compiler complain about
    # because they only make sense for C programs.
    QEMU_CXXFLAGS="$QEMU_CXXFLAGS -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS"

    for arg in $QEMU_CFLAGS; do
        case $arg in
            -Wstrict-prototypes|-Wmissing-prototypes|-Wnested-externs|\
            -Wold-style-declaration|-Wold-style-definition|-Wredundant-decls)
                ;;
            -std=gnu99)
                QEMU_CXXFLAGS=${QEMU_CXXFLAGS:+$QEMU_CXXFLAGS }"-std=gnu++98"
                ;;
            *)
                QEMU_CXXFLAGS=${QEMU_CXXFLAGS:+$QEMU_CXXFLAGS }$arg
                ;;
        esac
    done
}

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

compile_prog() {
  local_cflags="$1"
  local_ldflags="$2"
  do_cc $QEMU_CFLAGS $local_cflags -o $TMPE $TMPC $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
}

# search for an executable in PATH
path_of() {
    local_command="$1"
    local_ifs="$IFS"
    local_dir=""

    # pathname has a dir component?
    if [ "${local_command#*/}" != "$local_command" ]; then
        if [ -x "$local_command" ] && [ ! -d "$local_command" ]; then
            echo "$local_command"
            return 0
        fi
    fi
    if [ -z "$local_command" ]; then
        return 1
    fi

    IFS=:
    for local_dir in $PATH; do
        if [ -x "$local_dir/$local_command" ] && [ ! -d "$local_dir/$local_command" ]; then
            echo "$local_dir/$local_command"
            IFS="${local_ifs:-$(printf ' \t\n')}"
            return 0
        fi
    done
    # not found
    IFS="${local_ifs:-$(printf ' \t\n')}"
    return 1
}

glob() {
    eval test -z '"${1#'"$2"'}"'
}

supported_target() {
    case "$1" in
        *-softmmu)
            ;;
        *)
            print_error "Invalid target name '$target'"
            return 1
            ;;
    esac
    test "$tcg" = "yes" && return 0
    print_error "TCG disabled, but hardware accelerator not available for '$target'"
    return 1
}


ld_has() {
    $ld --help 2>/dev/null | grep ".$1" >/dev/null 2>&1
}

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

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

# default parameters
cpu=""
iasl="iasl"
interp_prefix="/usr/gnemul/qemu-%M"
static="no"
cross_prefix=""
host_cc="cc"
libs_cpu=""
libs_softmmu=""
libs_tools=""
debug_info="yes"
stack_protector=""

git_update=no
git_submodules=""

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.

tcg="yes"
membarrier=""
debug="no"
sanitizers="no"
strip_opt="yes"
bigendian="no"
mingw32="no"
EXESUF=""
DSOSUF=".so"
LDFLAGS_SHARED="-shared"
prefix="/usr/local"
bindir="\${prefix}/bin"
libdir="\${prefix}/lib"
libexecdir="\${prefix}/libexec"
includedir="\${prefix}/include"
sysconfdir="\${prefix}/etc"
local_statedir="\${prefix}/var"
confsuffix="/qemu"
bsd="no"
linux="no"
solaris="no"
softmmu="yes"
pkgversion=""
pie=""
cpuid_h="no"
avx2_opt=""
debug_stack_usage="no"
gtk_gl="no"
tcmalloc="no"
jemalloc="no"

supported_cpu="no"
supported_os="no"
bogus_os="no"
malloc_trim=""

# parse CC options first
for opt do
  optarg=$(expr "x$opt" : 'x[^=]*=\(.*\)')
  case "$opt" in
  --cross-prefix=*) cross_prefix="$optarg"
  ;;
  --cc=*) CC="$optarg"
  ;;
  --cxx=*) CXX="$optarg"
  ;;
  --cpu=*) cpu="$optarg"
  ;;
  --extra-cflags=*) QEMU_CFLAGS="$QEMU_CFLAGS $optarg"
                    QEMU_LDFLAGS="$QEMU_LDFLAGS $optarg"
  ;;
  --extra-cxxflags=*) QEMU_CXXFLAGS="$QEMU_CXXFLAGS $optarg"
  ;;
  --extra-ldflags=*) QEMU_LDFLAGS="$QEMU_LDFLAGS $optarg"
                     EXTRA_LDFLAGS="$optarg"
  ;;
  --enable-debug-info) debug_info="yes"
  ;;
  --disable-debug-info) debug_info="no"
  ;;
  --cross-cc-*[!a-zA-Z0-9_-]*=*) error_exit "Passed bad --cross-cc-FOO option"
  ;;
  --cross-cc-cflags-*) cc_arch=${opt#--cross-cc-flags-}; cc_arch=${cc_arch%%=*}
                      eval "cross_cc_cflags_${cc_arch}=\$optarg"
                      cross_cc_vars="$cross_cc_vars cross_cc_cflags_${cc_arch}"
  ;;
  --cross-cc-*) cc_arch=${opt#--cross-cc-}; cc_arch=${cc_arch%%=*}
                cc_archs="$cc_archs $cc_arch"
                eval "cross_cc_${cc_arch}=\$optarg"
                cross_cc_vars="$cross_cc_vars cross_cc_${cc_arch}"
  ;;
  esac
done
# OS specific
# Using uname is really, really broken.  Once we have the right set of checks
# we can eliminate its usage altogether.

# 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}"
cpp="${CPP-$cc -E}"
objcopy="${OBJCOPY-${cross_prefix}objcopy}"
ld="${LD-${cross_prefix}ld}"
ranlib="${RANLIB-${cross_prefix}ranlib}"
nm="${NM-${cross_prefix}nm}"
strip="${STRIP-${cross_prefix}strip}"
pkg_config_exe="${PKG_CONFIG-${cross_prefix}pkg-config}"
query_pkg_config() {
    "${pkg_config_exe}" ${QEMU_PKG_CONFIG_FLAGS} "$@"
}
pkg_config=query_pkg_config

# If the user hasn't specified ARFLAGS, default to 'rv', just as make does.
ARFLAGS="${ARFLAGS-rv}"

# 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 -std=gnu99 $QEMU_CFLAGS"
QEMU_CFLAGS="-Wall -Wundef -Wwrite-strings -Wmissing-prototypes $QEMU_CFLAGS"
QEMU_CFLAGS="-Wstrict-prototypes -Wredundant-decls $QEMU_CFLAGS"
QEMU_CFLAGS="-D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE $QEMU_CFLAGS"
QEMU_INCLUDES="-iquote . -iquote \$(SRC_PATH) -iquote \$(SRC_PATH)/accel/tcg -iquote \$(SRC_PATH)/include"
QEMU_INCLUDES="$QEMU_INCLUDES -iquote \$(SRC_PATH)/disas/libvixl"
if test "$debug_info" = "yes"; then
    CFLAGS="-g $CFLAGS"
fi

# running configure in the source tree?
# we know that's the case if configure is there.
if test -f "./configure"; then
    pwd_is_source_path="y"
else
    pwd_is_source_path="n"
fi

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='MINGW32'
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'
  bogus_os='yes'
fi

# Some host OSes need non-standard checks for which CPU to use.
# Note that these checks are broken for cross-compilation: if you're
# cross-compiling to one of these OSes then you'll need to specify
# the correct CPU with the --cpu option.
case $targetos in
Darwin)
  # on Leopard most of the system is 32-bit, so we have to ask the kernel if we can
  # run 64-bit userspace code.
  # If the user didn't specify a CPU explicitly and the kernel says this is
  # 64 bit hw, then assume x86_64. Otherwise fall through to the usual detection code.
  if test -z "$cpu" && test "$(sysctl -n hw.optional.x86_64)" = "1"; then
    cpu="x86_64"
  fi
  ;;
SunOS)
  # $(uname -m) returns i86pc even on an x86_64 box, so default based on isainfo
  if test -z "$cpu" && test "$(isainfo -k)" = "amd64"; then
    cpu="x86_64"
  fi
esac

if test ! -z "$cpu" ; then
  # command line argument
  :
elif check_define __i386__ ; then
  cpu="i386"
elif check_define __x86_64__ ; then
  if check_define __ILP32__ ; then
    cpu="x32"
  else
    cpu="x86_64"
  fi
elif check_define __sparc__ ; then
  if check_define __arch64__ ; then
    cpu="sparc64"
  else
    cpu="sparc"
  fi
elif check_define _ARCH_PPC ; then
  if check_define _ARCH_PPC64 ; then
    if check_define _LITTLE_ENDIAN ; then
      cpu="ppc64le"
    else
      cpu="ppc64"
    fi
  else
    cpu="ppc"
  fi
elif check_define __mips__ ; then
  cpu="mips"
elif check_define __s390__ ; then
  if check_define __s390x__ ; then
    cpu="s390x"
  else
    cpu="s390"
  fi
elif check_define __riscv ; then
  if check_define _LP64 ; then
    cpu="riscv64"
  else
    cpu="riscv32"
  fi
elif check_define __arm__ ; then
  cpu="arm"
elif check_define __aarch64__ ; then
  cpu="aarch64"
else
  cpu=$(uname -m)
fi

ARCH=
# Normalise host CPU name and set ARCH.
# Note that this case should only have supported host CPUs, not guests.
case "$cpu" in
  ppc|ppc64|s390x|sparc64|x32|riscv32|riscv64)
    supported_cpu="yes"
  ;;
  ppc64le)
    ARCH="ppc64"
    supported_cpu="yes"
  ;;
  i386|i486|i586|i686|i86pc|BePC)
    cpu="i386"
    supported_cpu="yes"
  ;;
  x86_64|amd64)
    cpu="x86_64"
    supported_cpu="yes"
  ;;
  armv*b|armv*l|arm)
    cpu="arm"
    supported_cpu="yes"
  ;;
  aarch64)
    cpu="aarch64"
    supported_cpu="yes"
  ;;
  mips*)
    cpu="mips"
    supported_cpu="yes"
  ;;
  sparc|sun4[cdmuv])
    cpu="sparc"
    supported_cpu="yes"
  ;;
  *)
    # This will result in either an error or falling back to TCI later
    ARCH=unknown
  ;;
esac
if test -z "$ARCH"; then
  ARCH="$cpu"
fi

# OS specific

# host *BSD for user mode
HOST_VARIANT_DIR=""

case $targetos in
MINGW32*)
  mingw32="yes"
  supported_os="yes"
  pie="no"
;;
GNU/kFreeBSD)
  bsd="yes"
;;
FreeBSD)
  bsd="yes"
  make="${MAKE-gmake}"
  # needed for kinfo_getvmmap(3) in libutil.h
  LIBS="-lutil $LIBS"
  # needed for kinfo_getproc
  HOST_VARIANT_DIR="freebsd"
  supported_os="yes"
;;
DragonFly)
  bsd="yes"
  make="${MAKE-gmake}"
  HOST_VARIANT_DIR="dragonfly"
;;
NetBSD)
  bsd="yes"
  make="${MAKE-gmake}"
  HOST_VARIANT_DIR="netbsd"
  supported_os="yes"
;;
OpenBSD)
  bsd="yes"
  make="${MAKE-gmake}"
  HOST_VARIANT_DIR="openbsd"
  supported_os="yes"
;;
Darwin)
  bsd="yes"
  darwin="yes"
  LDFLAGS_SHARED="-bundle -undefined dynamic_lookup"
  if [ "$cpu" = "x86_64" ] ; then
    QEMU_CFLAGS="-arch x86_64 $QEMU_CFLAGS"
    QEMU_LDFLAGS="-arch x86_64 $QEMU_LDFLAGS"
  fi
  QEMU_LDFLAGS="-framework CoreFoundation -framework IOKit $QEMU_LDFLAGS"
  libs_softmmu="-F/System/Library/Frameworks -framework -framework IOKit $libs_softmmu"
  # 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 $QEMU_CFLAGS"
  HOST_VARIANT_DIR="darwin"
  supported_os="yes"
;;
SunOS)
  solaris="yes"
  make="${MAKE-gmake}"
  install="${INSTALL-ginstall}"
# 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"
  QEMU_CFLAGS="-std=gnu99 $QEMU_CFLAGS"
  solarisnetlibs="-lsocket -lnsl -lresolv"
  LIBS="$solarisnetlibs $LIBS"
;;
Haiku)
  haiku="yes"
  QEMU_CFLAGS="-DB_USE_POSITIVE_POSIX_ERRORS $QEMU_CFLAGS"
  LIBS="-lposix_error_mapper -lnetwork $LIBS"
;;
Linux)
  linux="yes"
  QEMU_INCLUDES="-isystem \$(SRC_PATH)/linux-headers -isystem $PWD/linux-headers $QEMU_INCLUDES"
  supported_os="yes"
;;
esac

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

# 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"
  DSOSUF=".dll"
  # MinGW needs -mthreads for TLS and macro _MT.
  QEMU_CFLAGS="-mthreads $QEMU_CFLAGS"
  LIBS="-lwinmm -lws2_32 $LIBS"
  write_c_skeleton;
  if compile_prog "" "-liberty" ; then
    LIBS="-liberty $LIBS"
  fi
  prefix="c:/Program Files/QEMU"
  bindir="\${prefix}"
  sysconfdir="\${prefix}"
  local_statedir=
  confsuffix=""
fi

werror=""

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"
  ;;
  --interp-prefix=*) interp_prefix="$optarg"
  ;;
  --cross-prefix=*)
  ;;
  --cc=*)
  ;;
  --host-cc=*) host_cc="$optarg"
  ;;
  --cxx=*)
  ;;
  --iasl=*) iasl="$optarg"
  ;;
  --objcc=*) objcc="$optarg"
  ;;
  --make=*) make="$optarg"
  ;;
  --install=*) install="$optarg"
  ;;
  --extra-cflags=*)
  ;;
  --extra-cxxflags=*)
  ;;
  --extra-ldflags=*)
  ;;
  --enable-debug-info)
  ;;
  --disable-debug-info)
  ;;
  --cross-cc-*)
  ;;
  --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
  ;;
  --static)
    static="yes"
    QEMU_PKG_CONFIG_FLAGS="--static $QEMU_PKG_CONFIG_FLAGS"
  ;;
  --bindir=*) bindir="$optarg"
  ;;
  --libdir=*) libdir="$optarg"
  ;;
  --libexecdir=*) libexecdir="$optarg"
  ;;
  --includedir=*) includedir="$optarg"
  ;;
  --with-confsuffix=*) confsuffix="$optarg"
  ;;
  --sysconfdir=*) sysconfdir="$optarg"
  ;;
  --localstatedir=*) local_statedir="$optarg"
  ;;
  --host=*|--build=*|\
  --disable-dependency-tracking|\
  --sbindir=*|--sharedstatedir=*|\
  --oldincludedir=*|--datarootdir=*|--infodir=*|--localedir=*|\
  --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)
      # Enable debugging options that aren't excessively noisy
      debug="yes"
      strip_opt="no"
  ;;
  --enable-sanitizers) sanitizers="yes"
  ;;
  --disable-sanitizers) sanitizers="no"
  ;;
  --disable-strip) strip_opt="no"
  ;;
  --disable-tcg) tcg="no"
  ;;
  --enable-tcg) tcg="yes"
  ;;
  --disable-malloc-trim) malloc_trim="no"
  ;;
  --enable-malloc-trim) malloc_trim="yes"
  ;;
  --enable-system) softmmu="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"
  ;;
  --disable-membarrier) membarrier="no"
  ;;
  --enable-membarrier) membarrier="yes"
  ;;
  --with-pkgversion=*) pkgversion="$optarg"
  ;;
  --enable-debug-stack-usage) debug_stack_usage="yes"
  ;;
  --disable-avx2) avx2_opt="no"
  ;;
  --enable-avx2) avx2_opt="yes"
  ;;
  --disable-avx512f) avx512f_opt="no"
  ;;
  --enable-avx512f) avx512f_opt="yes"
  ;;

  --disable-virtio-blk-data-plane|--enable-virtio-blk-data-plane)
      echo "$0: $opt is obsolete, virtio-blk data-plane is always on" >&2
  ;;
  --enable-vhdx|--disable-vhdx)
      echo "$0: $opt is obsolete, VHDX driver is always built" >&2
  ;;
  --enable-uuid|--disable-uuid)
      echo "$0: $opt is obsolete, UUID support is always built" >&2
  ;;
  --disable-tcmalloc) tcmalloc="no"
  ;;
  --enable-tcmalloc) tcmalloc="yes"
  ;;
  --disable-jemalloc) jemalloc="no"
  ;;
  --enable-jemalloc) jemalloc="yes"
  ;;
  --with-git=*) git="$optarg"
  ;;
  *)
      echo "ERROR: unknown option $opt"
      echo "Try '$0 --help' for more information"
      exit 1
  ;;
  esac
done

case "$cpu" in
    ppc)
           CPU_CFLAGS="-m32"
           QEMU_LDFLAGS="-m32 $QEMU_LDFLAGS"
           ;;
    ppc64)
           CPU_CFLAGS="-m64"
           QEMU_LDFLAGS="-m64 $QEMU_LDFLAGS"
           ;;
    sparc)
           CPU_CFLAGS="-m32 -mv8plus -mcpu=ultrasparc"
           QEMU_LDFLAGS="-m32 -mv8plus $QEMU_LDFLAGS"
           ;;
    sparc64)
           CPU_CFLAGS="-m64 -mcpu=ultrasparc"
           QEMU_LDFLAGS="-m64 $QEMU_LDFLAGS"
           ;;
    s390)
           CPU_CFLAGS="-m31"
           QEMU_LDFLAGS="-m31 $QEMU_LDFLAGS"
           ;;
    s390x)
           CPU_CFLAGS="-m64"
           QEMU_LDFLAGS="-m64 $QEMU_LDFLAGS"
           ;;
    i386)
           CPU_CFLAGS="-m32"
           QEMU_LDFLAGS="-m32 $QEMU_LDFLAGS"
           ;;
    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"
           QEMU_LDFLAGS="-m64 $QEMU_LDFLAGS"
           ;;
    x32)
           CPU_CFLAGS="-mx32"
           QEMU_LDFLAGS="-mx32 $QEMU_LDFLAGS"
           ;;
    # No special flags required for other host CPUs
esac

eval "cross_cc_${cpu}=\$host_cc"
cross_cc_vars="$cross_cc_vars cross_cc_${cpu}"
QEMU_CFLAGS="$CPU_CFLAGS $QEMU_CFLAGS"

default_target_list="aarch64-softmmu \
    arm-softmmu m68k-softmmu mips64el-softmmu mips64-softmmu mipsel-softmmu \
    mips-softmmu ppc64-softmmu ppc-softmmu sparc64-softmmu sparc-softmmu \
    x86_64-softmmu riscv32-softmmu riscv64-softmmu s390x-softmmu"

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 [$prefix]
  --interp-prefix=PREFIX   where to find shared libraries, etc.
                           use %M for cpu name [$interp_prefix]
  --target-list=LIST       set target list (default: build everything)
$(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 [$cross_prefix]
  --cc=CC                  use C compiler CC [$cc]
  --iasl=IASL              use ACPI compiler IASL [$iasl]
  --host-cc=CC             use C compiler CC [$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 QEMU_CFLAGS
  --extra-cxxflags=CXXFLAGS append extra C++ compiler flags QEMU_CXXFLAGS
  --extra-ldflags=LDFLAGS  append extra linker flags LDFLAGS
  --cross-cc-ARCH=CC       use compiler when building ARCH guest test cases
  --cross-cc-flags-ARCH=   use compiler flags when building ARCH guest tests
  --make=MAKE              use specified make [$make]
  --install=INSTALL        use specified install [$install]
  --with-git=GIT           use specified git [$git]
  --static                 enable static build [$static]
  --docdir=PATH            install documentation in PATH$confsuffix
  --bindir=PATH            install binaries in PATH
  --libdir=PATH            install libraries in PATH
  --libexecdir=PATH        install helper binaries in PATH
  --sysconfdir=PATH        install config in PATH$confsuffix
  --localstatedir=PATH     install local state in PATH (set at runtime on win32)
  --with-confsuffix=SUFFIX suffix for QEMU data inside datadir/libdir/sysconfdir [$confsuffix]
  --with-pkgversion=VERS   use specified string as sub-version of the package
  --enable-debug           enable common debug build options
  --enable-sanitizers      enable default sanitizers
  --disable-strip          disable stripping binaries
  --disable-werror         disable compilation abort on warning
  --disable-stack-protector disable compiler-provided stack protection
  --enable-malloc-trim     enable libc malloc_trim() for memory optimization
  --cpu=CPU                Build for host CPU [$cpu]
  --enable-debug-stack-usage
                           track the maximum stack usage of stacks created by qemu_alloc_stack

Optional features, enabled with --enable-FEATURE and
disabled with --disable-FEATURE, default is enabled if available:

  pie             Position Independent Executables
  debug-tcg       TCG debugging (default is disabled)
  membarrier      membarrier system call (for Linux 4.14+ or Windows)
  tcmalloc        tcmalloc support
  jemalloc        jemalloc support
  avx2            AVX2 optimization support
  avx512f         AVX512F optimization support

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

# 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

# Now we have handled --enable-tcg-interpreter and know we're not just
# printing the help message, bail out if the host CPU isn't supported.
if test "$ARCH" = "unknown"; then
    error_exit "Unsupported CPU = $cpu, try --enable-tcg-interpreter"
fi

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

if test "$bogus_os" = "yes"; then
    # Now that we know that we're not printing the help and that
    # the compiler works (so the results of the check_defines we used
    # to identify the OS are reliable), if we didn't recognize the
    # host OS we should stop now.
    error_exit "Unrecognized host OS (uname -s reports '$(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__ < 5 || (__clang_major__ == 5 && __clang_minor__ < 1)
#   error You need at least XCode Clang v5.1 to compile QEMU
#  endif
# else
#  if __clang_major__ < 3 || (__clang_major__ == 3 && __clang_minor__ < 4)
#   error You need at least Clang v3.4 to compile QEMU
#  endif
# endif
#elif defined(__GNUC__) && defined(__GNUC_MINOR__)
# if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 8)
#  error You need at least GCC v4.8 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 v4.8 or Clang v3.4 (or XCode Clang v5.1)"
fi

gcc_flags="-Wold-style-declaration -Wold-style-definition -Wtype-limits"
gcc_flags="-Wformat-security -Wformat-y2k -Winit-self -Wignored-qualifiers $gcc_flags"
gcc_flags="-Wno-missing-include-dirs -Wempty-body -Wnested-externs $gcc_flags"
gcc_flags="-Wendif-labels -Wno-shift-negative-value $gcc_flags"
gcc_flags="-Wno-initializer-overrides -Wexpansion-to-defined $gcc_flags"
gcc_flags="-Wno-string-plus-int -Wno-typedef-redefinition $gcc_flags"
# Note that we do not add -Werror to gcc_flags here, 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.

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" ""
}

for flag in $gcc_flags; do
    if cc_has_warning_flag $flag ; then
        QEMU_CFLAGS="$QEMU_CFLAGS $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[0];
    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 do_cc $QEMU_CFLAGS -Werror $flag -c -o $TMPO $TMPC &&
       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

# Unconditional check for compiler __thread support
  cat > $TMPC << EOF
static __thread int tls_var;
int main(void) { return tls_var; }
EOF

if ! compile_prog "-Werror" "" ; then
    error_exit "Your compiler does not support the __thread specifier for " \
	"Thread-Local Storage (TLS). Please upgrade to a version that does."
fi

cat > $TMPC << EOF

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

if test "$static" = "yes"; then
  if test "$pie" != "no" && compile_prog "-Werror -fPIE -DPIE" "-static-pie"; then
    QEMU_CFLAGS="-fPIE -DPIE $QEMU_CFLAGS"
    QEMU_LDFLAGS="-static-pie $QEMU_LDFLAGS"
    pie="yes"
  elif test "$pie" = "yes"; then
    error_exit "-static-pie not available due to missing toolchain support"
  else
    QEMU_LDFLAGS="-static $QEMU_LDFLAGS"
    pie="no"
  fi
elif test "$pie" = "no"; then
  QEMU_CFLAGS="$CFLAGS_NOPIE $QEMU_CFLAGS"
  QEMU_LDFLAGS="$LDFLAGS_NOPIE $QEMU_LDFLAGS"
elif compile_prog "-Werror -fPIE -DPIE" "-pie"; then
  QEMU_CFLAGS="-fPIE -DPIE $QEMU_CFLAGS"
  QEMU_LDFLAGS="-pie $QEMU_LDFLAGS"
  pie="yes"
elif test "$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

# Detect support for PT_GNU_RELRO + DT_BIND_NOW.
# The combination is known as "full relro", because .got.plt is read-only too.
if compile_prog "" "-Wl,-z,relro -Wl,-z,now" ; then
  QEMU_LDFLAGS="-Wl,-z,relro -Wl,-z,now $QEMU_LDFLAGS"
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

#########################################
# Solaris specific configure tool chain decisions

if test "$solaris" = "yes" ; then
  if has $install; then
    :
  else
    error_exit "Solaris install program not found. Use --install=/usr/ucb/install or" \
        "install fileutils from www.blastwave.org using pkg-get -i fileutils" \
        "to get ginstall which is used by default (which lives in /opt/csw/bin)"
  fi
  if test "$(path_of $install)" = "/usr/sbin/install" ; then
    error_exit "Solaris /usr/sbin/install is not an appropriate install program." \
        "try ginstall from the GNU fileutils available from www.blastwave.org" \
        "using pkg-get -i fileutils, or use --install=/usr/ucb/install"
  fi
  if has ar; then
    :
  else
    if test -f /usr/ccs/bin/ar ; then
      error_exit "No path includes ar" \
          "Add /usr/ccs/bin to your path and rerun configure"
    fi
    error_exit "No path includes ar"
  fi
fi

if test -z "${target_list+xxx}" ; then
    for target in $default_target_list; do
        supported_target $target 2>/dev/null && \
            target_list="$target_list $target"
    done
    target_list="${target_list# }"
else
    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
        supported_target $target || exit 1
    done
fi

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

feature_not_found() {
  feature=$1
  remedy=$2

  error_exit "User requested feature $feature" \
      "configure was not able to find it." \
      "$remedy"
}

# ---
# big/little endian test
cat > $TMPC << EOF
short big_endian[] = { 0x4269, 0x4765, 0x4e64, 0x4961, 0x4e00, 0, };
short little_endian[] = { 0x694c, 0x7454, 0x654c, 0x6e45, 0x6944, 0x6e41, 0, };
extern int foo(short *, short *);
int main(int argc, char *argv[]) {
    return foo(big_endian, little_endian);
}
EOF

if compile_object ; then
    if strings -a $TMPO | grep -q BiGeNdIaN ; then
        bigendian="yes"
    elif strings -a $TMPO | grep -q LiTtLeEnDiAn ; then
        bigendian="no"
    else
        echo big/little test failed
    fi
else
    echo big/little test failed
fi

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

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

##########################################
# pthread probe
PTHREADLIBS_LIST="-pthread -lpthread -lpthreadGC2"

pthread=no
cat > $TMPC << EOF
#include <pthread.h>
static void *f(void *p) { return NULL; }
int main(void) {
  pthread_t thread;
  pthread_create(&thread, 0, f, 0);
  return 0;
}
EOF
if compile_prog "" "" ; then
  pthread=yes
else
  for pthread_lib in $PTHREADLIBS_LIST; do
    if compile_prog "" "$pthread_lib" ; then
      pthread=yes
      found=no
      for lib_entry in $LIBS; do
        if test "$lib_entry" = "$pthread_lib"; then
          found=yes
          break
        fi
      done
      if test "$found" = "no"; then
        LIBS="$pthread_lib $LIBS"
      fi
      PTHREAD_LIB="$pthread_lib"
      break
    fi
  done
fi

if test "$mingw32" != yes && test "$pthread" = no; then
  error_exit "pthread check failed" \
      "Make sure to have the pthread libs and headers installed."
fi

# check for pthread_setname_np with thread id
pthread_setname_np_w_tid=no
cat > $TMPC << EOF
#include <pthread.h>

static void *f(void *p) { return NULL; }
int main(void)
{
    pthread_t thread;
    pthread_create(&thread, 0, f, 0);
    pthread_setname_np(thread, "QEMU");
    return 0;
}
EOF
if compile_prog "" "$pthread_lib" ; then
  pthread_setname_np_w_tid=yes
fi

# check for pthread_setname_np without thread id
pthread_setname_np_wo_tid=no
cat > $TMPC << EOF
#include <pthread.h>

static void *f(void *p) { pthread_setname_np("QEMU"); }
int main(void)
{
    pthread_t thread;
    pthread_create(&thread, 0, f, 0);
    return 0;
}
EOF
if compile_prog "" "$pthread_lib" ; then
  pthread_setname_np_wo_tid=yes
fi

if test "$tcmalloc" = "yes" && test "$jemalloc" = "yes" ; then
    echo "ERROR: tcmalloc && jemalloc can't be used at the same time"
    exit 1
fi

# Even if malloc_trim() is available, these non-libc memory allocators
# do not support it.
if test "$tcmalloc" = "yes" || test "$jemalloc" = "yes" ; then
    if test "$malloc_trim" = "yes" ; then
        echo "Disabling malloc_trim with non-libc memory allocator"
    fi
    malloc_trim="no"
fi

#######################################
# malloc_trim

if test "$malloc_trim" != "no" ; then
    cat > $TMPC << EOF
#include <malloc.h>
int main(void) { malloc_trim(0); return 0; }
EOF
    if compile_prog "" "" ; then
        malloc_trim="yes"
    else
        malloc_trim="no"
    fi
fi

##########################################
# tcmalloc probe

if test "$tcmalloc" = "yes" ; then
  cat > $TMPC << EOF
#include <stdlib.h>
int main(void) { malloc(1); return 0; }
EOF

  if compile_prog "" "-ltcmalloc" ; then
    LIBS="-ltcmalloc $LIBS"
  else
    feature_not_found "tcmalloc" "install gperftools devel"
  fi
fi

##########################################
# jemalloc probe

if test "$jemalloc" = "yes" ; then
  cat > $TMPC << EOF
#include <stdlib.h>
int main(void) { malloc(1); return 0; }
EOF

  if compile_prog "" "-ljemalloc" ; then
    LIBS="-ljemalloc $LIBS"
  else
    feature_not_found "jemalloc" "install jemalloc devel"
  fi
fi

##########################################
# signalfd probe
signalfd="no"
cat > $TMPC << EOF
#include <unistd.h>
#include <sys/syscall.h>
#include <signal.h>
int main(void) { return syscall(SYS_signalfd, -1, NULL, _NSIG / 8); }
EOF

if compile_prog "" "" ; then
  signalfd=yes
fi

# check for sync_file_range
sync_file_range=no
cat > $TMPC << EOF
#include <fcntl.h>

int main(void)
{
    sync_file_range(0, 0, 0, 0);
    return 0;
}
EOF
if compile_prog "" "" ; then
  sync_file_range=yes
fi

# check for dup3
dup3=no
cat > $TMPC << EOF
#include <unistd.h>

int main(void)
{
    dup3(0, 0, 0);
    return 0;
}
EOF
if compile_prog "" "" ; then
  dup3=yes
fi

# check for prctl(PR_SET_TIMERSLACK , ... ) support
prctl_pr_set_timerslack=no
cat > $TMPC << EOF
#include <sys/prctl.h>

int main(void)
{
    prctl(PR_SET_TIMERSLACK, 1, 0, 0, 0);
    return 0;
}
EOF
if compile_prog "" "" ; then
  prctl_pr_set_timerslack=yes
fi

# check for epoll support
epoll=no
cat > $TMPC << EOF
#include <sys/epoll.h>

int main(void)
{
    epoll_create(0);
    return 0;
}
EOF
if compile_prog "" "" ; then
  epoll=yes
fi

# clock_adjtime probe
clock_adjtime=no
cat > $TMPC <<EOF
#include <time.h>

int main(void)
{
    return clock_adjtime(0, 0);
}
EOF
clock_adjtime=no
if compile_prog "" "" ; then
  clock_adjtime=yes
fi

# syncfs probe
syncfs=no
cat > $TMPC <<EOF
#include <unistd.h>

int main(void)
{
    return syncfs(0);
}
EOF
syncfs=no
if compile_prog "" "" ; then
  syncfs=yes
fi

# Search for bswap_32 function
byteswap_h=no
cat > $TMPC << EOF
#include <byteswap.h>
int main(void) { return bswap_32(0); }
EOF
if compile_prog "" "" ; then
  byteswap_h=yes
fi

# Search for bswap32 function
bswap_h=no
cat > $TMPC << EOF
#include <sys/endian.h>
#include <sys/types.h>
#include <machine/bswap.h>
int main(void) { return bswap32(0); }
EOF
if compile_prog "" "" ; then
  bswap_h=yes
fi

##########################################
# Do we need libm
cat > $TMPC << EOF
#include <math.h>
int main(int argc, char **argv) { return isnan(sin((double)argc)); }
EOF
if compile_prog "" "" ; then
  :
elif compile_prog "" "-lm" ; then
  LIBS="-lm $LIBS"
else
  error_exit "libm check failed"
fi

##########################################
# Do we need librt
# uClibc provides 2 versions of clock_gettime(), one with realtime
# support and one without. This means that the clock_gettime() don't
# need -lrt. We still need it for timer_create() so we check for this
# function in addition.
cat > $TMPC <<EOF
#include <signal.h>
#include <time.h>
int main(void) {
  timer_create(CLOCK_REALTIME, NULL, NULL);
  return clock_gettime(CLOCK_REALTIME, NULL);
}
EOF

if compile_prog "" "" ; then
  :
# we need pthread for static linking. use previous pthread test result
elif compile_prog "" "$pthread_lib -lrt" ; then
  LIBS="$LIBS -lrt"
fi

# Check whether we need to link libutil for openpty()
cat > $TMPC << EOF
extern int openpty(int *am, int *as, char *name, void *termp, void *winp);
int main(void) { return openpty(0, 0, 0, 0, 0); }
EOF

if ! compile_prog "" "" ; then
  if compile_prog "" "-lutil" ; then
    libs_softmmu="-lutil $libs_softmmu"
    libs_tools="-lutil $libs_tools"
  fi
fi

##########################################
# check if we have madvise

madvise=no
cat > $TMPC << EOF
#include <sys/types.h>
#include <sys/mman.h>
#include <stddef.h>
int main(void) { return madvise(NULL, 0, MADV_DONTNEED); }
EOF
if compile_prog "" "" ; then
    madvise=yes
fi

##########################################
# check if we have posix_madvise

posix_madvise=no
cat > $TMPC << EOF
#include <sys/mman.h>
#include <stddef.h>
int main(void) { return posix_madvise(NULL, 0, POSIX_MADV_DONTNEED); }
EOF
if compile_prog "" "" ; then
    posix_madvise=yes
fi

##########################################
# check if we have posix_memalign()

posix_memalign=no
cat > $TMPC << EOF
#include <stdlib.h>
int main(void) {
    void *p;
    return posix_memalign(&p, 8, 8);
}
EOF
if compile_prog "" "" ; then
    posix_memalign=yes
fi

##########################################
# check if we have posix_syslog

posix_syslog=no
cat > $TMPC << EOF
#include <syslog.h>
int main(void) { openlog("qemu", LOG_PID, LOG_DAEMON); syslog(LOG_INFO, "configure"); return 0; }
EOF
if compile_prog "" "" ; then
    posix_syslog=yes
fi

##########################################
# check if we have sem_timedwait

sem_timedwait=no
cat > $TMPC << EOF
#include <semaphore.h>
int main(void) { sem_t s; struct timespec t = {0}; return sem_timedwait(&s, &t); }
EOF
if compile_prog "" "" ; then
    sem_timedwait=yes
fi

##########################################
# check if we have strchrnul

strchrnul=no
cat > $TMPC << EOF
#include <string.h>
int main(void);
// Use a haystack that the compiler shouldn't be able to constant fold
char *haystack = (char*)&main;
int main(void) { return strchrnul(haystack, 'x') != &haystack[6]; }
EOF
if compile_prog "" "" ; then
    strchrnul=yes
fi

#########################################
# check if we have st_atim

st_atim=no
cat > $TMPC << EOF
#include <sys/stat.h>
#include <stddef.h>
int main(void) { return offsetof(struct stat, st_atim); }
EOF
if compile_prog "" "" ; then
    st_atim=yes
fi

##########################################
# check if we have open_by_handle_at

open_by_handle_at=no
cat > $TMPC << EOF
#include <fcntl.h>
#if !defined(AT_EMPTY_PATH)
# error missing definition
#else
int main(void) { struct file_handle fh; return open_by_handle_at(0, &fh, 0); }
#endif
EOF
if compile_prog "" "" ; then
    open_by_handle_at=yes
fi

########################################
# check if we have linux/magic.h

linux_magic_h=no
cat > $TMPC << EOF
#include <linux/magic.h>
int main(void) {
  return 0;
}
EOF
if compile_prog "" "" ; then
    linux_magic_h=yes
fi

########################################
# check whether we can disable warning option with a pragma (this is needed
# to silence warnings in the headers of some versions of external libraries).
# This test has to be compiled with -Werror as otherwise an unknown pragma is
# only a warning.
#
# If we can't selectively disable warning in the code, disable -Werror so that
# the build doesn't fail anyway.

pragma_disable_unused_but_set=no
cat > $TMPC << EOF
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wstrict-prototypes"
#pragma GCC diagnostic pop

int main(void) {
    return 0;
}
EOF
if compile_prog "-Werror" "" ; then
    pragma_diagnostic_available=yes
else
    werror=no
fi

########################################
# check if environ is declared

has_environ=no
cat > $TMPC << EOF
#include <unistd.h>
int main(void) {
    environ = 0;
    return 0;
}
EOF
if compile_prog "" "" ; then
    has_environ=yes
fi

########################################
# check if cpuid.h is usable.

cat > $TMPC << EOF
#include <cpuid.h>
int main(void) {
    unsigned a, b, c, d;
    int max = __get_cpuid_max(0, 0);

    if (max >= 1) {
        __cpuid(1, a, b, c, d);
    }

    if (max >= 7) {
        __cpuid_count(7, 0, a, b, c, d);
    }

    return 0;
}
EOF
if compile_prog "" "" ; then
    cpuid_h=yes
fi

##########################################
# avx2 optimization requirement check
#
# There is no point enabling this if cpuid.h is not usable,
# since we won't be able to select the new routines.

if test "$cpuid_h" = "yes" && test "$avx2_opt" != "no"; then
  cat > $TMPC << EOF
#pragma GCC push_options
#pragma GCC target("avx2")
#include <cpuid.h>
#include <immintrin.h>
static int bar(void *a) {
    __m256i x = *(__m256i *)a;
    return _mm256_testz_si256(x, x);
}
int main(int argc, char *argv[]) { return bar(argv[0]); }
EOF
  if compile_object "" ; then
    avx2_opt="yes"
  else
    avx2_opt="no"
  fi
fi

##########################################
# avx512f optimization requirement check
#
# There is no point enabling this if cpuid.h is not usable,
# since we won't be able to select the new routines.
# by default, it is turned off.
# if user explicitly want to enable it, check environment

if test "$cpuid_h" = "yes" && test "$avx512f_opt" = "yes"; then
  cat > $TMPC << EOF
#pragma GCC push_options
#pragma GCC target("avx512f")
#include <cpuid.h>
#include <immintrin.h>
static int bar(void *a) {
    __m512i x = *(__m512i *)a;
    return _mm512_test_epi64_mask(x, x);
}
int main(int argc, char *argv[])
{
	return bar(argv[0]);
}
EOF
  if ! compile_object "" ; then
    avx512f_opt="no"
  fi
else
  avx512f_opt="no"
fi

########################################
# check if __[u]int128_t is usable.

int128=no
cat > $TMPC << EOF
__int128_t a;
__uint128_t b;
int main (void) {
  a = a + b;
  b = a * b;
  a = a * a;
  return 0;
}
EOF
if compile_prog "" "" ; then
    int128=yes
fi

#########################################
# See if 128-bit atomic operations are supported.

atomic128=no
if test "$int128" = "yes"; then
  cat > $TMPC << EOF
int main(void)
{
  unsigned __int128 x = 0, y = 0;
  y = __atomic_load_16(&x, 0);
  __atomic_store_16(&x, y, 0);
  __atomic_compare_exchange_16(&x, &y, x, 0, 0, 0);
  return 0;
}
EOF
  if compile_prog "" "" ; then
    atomic128=yes
  fi
fi

cmpxchg128=no
if test "$int128" = yes && test "$atomic128" = no; then
  cat > $TMPC << EOF
int main(void)
{
  unsigned __int128 x = 0, y = 0;
  __sync_val_compare_and_swap_16(&x, y, x);
  return 0;
}
EOF
  if compile_prog "" "" ; then
    cmpxchg128=yes
  fi
fi

#########################################
# See if 64-bit atomic operations are supported.
# Note that without __atomic builtins, we can only
# assume atomic loads/stores max at pointer size.

cat > $TMPC << EOF
#include <stdint.h>
int main(void)
{
  uint64_t x = 0, y = 0;
#ifdef __ATOMIC_RELAXED
  y = __atomic_load_8(&x, 0);
  __atomic_store_8(&x, y, 0);
  __atomic_compare_exchange_8(&x, &y, x, 0, 0, 0);
  __atomic_exchange_8(&x, y, 0);
  __atomic_fetch_add_8(&x, y, 0);
#else
  typedef char is_host64[sizeof(void *) >= sizeof(uint64_t) ? 1 : -1];
  __sync_lock_test_and_set(&x, y);
  __sync_val_compare_and_swap(&x, y, 0);
  __sync_fetch_and_add(&x, y);
#endif
  return 0;
}
EOF
if compile_prog "" "" ; then
  atomic64=yes
fi

#########################################
# See if --dynamic-list is supported by the linker
ld_dynamic_list="no"
if test "$static" = "no" ; then
    cat > $TMPTXT <<EOF
{
  foo;
};
EOF

    cat > $TMPC <<EOF
#include <stdio.h>
void foo(void);

void foo(void)
{
  printf("foo\n");
}

int main(void)
{
  foo();
  return 0;
}
EOF

    if compile_prog "" "-Wl,--dynamic-list=$TMPTXT" ; then
        ld_dynamic_list="yes"
    fi
fi

#########################################
# See if -exported_symbols_list is supported by the linker

ld_exported_symbols_list="no"
if test "$static" = "no" ; then
    cat > $TMPTXT <<EOF
  _foo
EOF

    if compile_prog "" "-Wl,-exported_symbols_list,$TMPTXT" ; then
        ld_exported_symbols_list="yes"
    fi
fi

########################################
# See if __attribute__((alias)) is supported.
# This false for Xcode 9, but has been remedied for Xcode 10.
# Unfortunately, travis uses Xcode 9 by default.

attralias=no
cat > $TMPC << EOF
int x = 1;
extern const int y __attribute__((alias("x")));
int main(void) { return 0; }
EOF
if compile_prog "" "" ; then
    attralias=yes
fi

########################################
# check if getauxval is available.

getauxval=no
cat > $TMPC << EOF
#include <sys/auxv.h>
int main(void) {
  return getauxval(AT_HWCAP) == 0;
}
EOF
if compile_prog "" "" ; then
    getauxval=yes
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(int argc, char *argv[])
{
    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

##########################################
# check for usable membarrier system call
if test "$membarrier" = "yes"; then
    have_membarrier=no
    if test "$mingw32" = "yes" ; then
        have_membarrier=yes
    elif test "$linux" = "yes" ; then
        cat > $TMPC << EOF
    #include <linux/membarrier.h>
    #include <sys/syscall.h>
    #include <unistd.h>
    #include <stdlib.h>
    int main(void) {
        syscall(__NR_membarrier, MEMBARRIER_CMD_QUERY, 0);
        syscall(__NR_membarrier, MEMBARRIER_CMD_SHARED, 0);
	exit(0);
    }
EOF
        if compile_prog "" "" ; then
            have_membarrier=yes
        fi
    fi
    if test "$have_membarrier" = "no"; then
      feature_not_found "membarrier" "membarrier system call not available"
    fi
else
    # Do not enable it by default even for Mingw32, because it doesn't
    # work on Wine.
    membarrier=no
fi

#################################################
# Sparc implicitly links with --relax, which is
# incompatible with -r, so --no-relax should be
# given. It does no harm to give it on other
# platforms too.

# Note: the prototype is needed since QEMU_CFLAGS
#       contains -Wmissing-prototypes
cat > $TMPC << EOF
extern int foo(void);
int foo(void) { return 0; }
EOF
if ! compile_object ""; then
  error_exit "Failed to compile object file for LD_REL_FLAGS test"
fi
for i in '-Wl,-r -Wl,--no-relax' -Wl,-r -r; do
  if do_cc -nostdlib $i -o $TMPMO $TMPO; then
    LD_REL_FLAGS=$i
    break
  fi
done

##########################################
# check for sysmacros.h

have_sysmacros=no
cat > $TMPC << EOF
#include <sys/sysmacros.h>
int main(void) {
    return makedev(0, 0);
}
EOF
if compile_prog "" "" ; then
    have_sysmacros=yes
fi

##########################################
# check for _Static_assert()

have_static_assert=no
cat > $TMPC << EOF
_Static_assert(1, "success");
int main(void) {
    return 0;
}
EOF
if compile_prog "" "" ; then
    have_static_assert=yes
fi

##########################################
# check for utmpx.h, it is missing e.g. on OpenBSD

have_utmpx=no
cat > $TMPC << EOF
#include <utmpx.h>
struct utmpx user_info;
int main(void) {
    return 0;
}
EOF
if compile_prog "" "" ; then
    have_utmpx=yes
fi

##########################################
# check for getrandom()

have_getrandom=no
cat > $TMPC << EOF
#include <sys/random.h>
int main(void) {
    return getrandom(0, 0, GRND_NONBLOCK);
}
EOF
if compile_prog "" "" ; then
    have_getrandom=yes
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 > $TMPC << EOF
#include <stdlib.h>
int main(void) {
    void *tmp = malloc(10);
    return *(int *)(tmp + 2);
}
EOF
  if compile_prog "$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

##########################################
# check for Apple Silicon JIT function

if [ "$darwin" = "yes" ] ; then
  cat > $TMPC << EOF
#include <pthread.h>
int main() { pthread_jit_write_protect_np(0); return 0; }
EOF
  if ! compile_prog ""; then
    have_pthread_jit_protect='no'
  else
    have_pthread_jit_protect='yes'
  fi
fi

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

write_c_skeleton

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_ubsan" = "yes"; then
  QEMU_CFLAGS="-fsanitize=undefined $QEMU_CFLAGS"
  QEMU_LDFLAGS="-fsanitize=undefined $QEMU_LDFLAGS"
fi

# Now we've finished running tests it's OK to add -Werror to the compiler flags
if test "$werror" = "yes"; then
    QEMU_CFLAGS="-Werror $QEMU_CFLAGS"
fi

if test "$solaris" = "no" ; then
    if $ld --version 2>/dev/null | grep "GNU ld" >/dev/null 2>/dev/null ; then
        QEMU_LDFLAGS="-Wl,--warn-common $QEMU_LDFLAGS"
    fi
fi

# Use ASLR, no-SEH and DEP if available
if test "$mingw32" = "yes" ; then
    for flag in --dynamicbase --no-seh --nxcompat; do
        if ld_has $flag ; then
            QEMU_LDFLAGS="-Wl,$flag $QEMU_LDFLAGS"
        fi
    done
fi

# Disable OpenBSD W^X if available
if test "$tcg" = "yes" && test "$targetos" = "OpenBSD"; then
    cat > $TMPC <<EOF
    int main(void) { return 0; }
EOF
    wx_ldflags="-Wl,-z,wxneeded"
    if compile_prog "" "$wx_ldflags"; then
        QEMU_LDFLAGS="$QEMU_LDFLAGS $wx_ldflags"
    fi
fi

qemu_confdir=$sysconfdir$confsuffix
qemu_localedir="$datadir/locale"

# Check that the C++ compiler exists and works with the C compiler.
# All the QEMU_CXXFLAGS are based on QEMU_CFLAGS. Keep this at the end to don't miss any other that could be added.
if has $cxx; then
    cat > $TMPC <<EOF
int c_function(void);
int main(void) { return c_function(); }
EOF

    compile_object

    cat > $TMPCXX <<EOF
extern "C" {
   int c_function(void);
}
int c_function(void) { return 42; }
EOF

    update_cxxflags

    if do_cxx $QEMU_CXXFLAGS -o $TMPE $TMPCXX $TMPO $QEMU_LDFLAGS; then
        # C++ compiler $cxx works ok with C compiler $cc
        :
    else
        echo "C++ compiler $cxx does not work with C compiler $cc"
        echo "Disabling C++ specific optional code"
        cxx=
    fi
else
    echo "No C++ compiler available; disabling C++ specific optional code"
    cxx=
fi

echo_version() {
    if test "$1" = "yes" ; then
        echo "($2)"
    fi
}

echo "Install prefix    $prefix"
echo "binary directory  $(eval echo $bindir)"
echo "library directory $(eval echo $libdir)"
echo "libexec directory $(eval echo $libexecdir)"
echo "include directory $(eval echo $includedir)"
echo "config directory  $(eval echo $sysconfdir)"
if test "$mingw32" = "no" ; then
echo "local state directory   $(eval echo $local_statedir)"
echo "ELF interp prefix $interp_prefix"
else
echo "local state directory   queried at runtime"
fi
echo "Build directory   $(pwd)"
echo "Source path       $source_path"
echo "GIT binary        $git"
echo "GIT submodules    $git_submodules"
echo "C compiler        $cc"
echo "Host C compiler   $host_cc"
echo "C++ compiler      $cxx"
echo "Objective-C compiler $objcc"
echo "ARFLAGS           $ARFLAGS"
echo "CFLAGS            $CFLAGS"
echo "QEMU_CFLAGS       $QEMU_CFLAGS"
echo "QEMU_LDFLAGS      $QEMU_LDFLAGS"
echo "make              $make"
echo "install           $install"
echo "host CPU          $cpu"
echo "host big endian   $bigendian"
echo "target list       $target_list"
echo "strip binaries    $strip_opt"
echo "static build      $static"
echo "mingw32 support   $mingw32"
echo "PIE               $pie"
echo "TCG support       $tcg"
echo "malloc trim support $malloc_trim"
echo "membarrier        $membarrier"
echo "madvise           $madvise"
echo "posix_madvise     $posix_madvise"
echo "posix_memalign    $posix_memalign"
echo "debug stack usage $debug_stack_usage"
echo "tcmalloc support  $tcmalloc"
echo "jemalloc support  $jemalloc"
echo "avx2 optimization $avx2_opt"
echo "avx512f optimization $avx512f_opt"

if test "$supported_cpu" = "no"; then
    echo
    echo "WARNING: SUPPORT FOR THIS HOST CPU WILL GO AWAY IN FUTURE RELEASES!"
    echo
    echo "CPU host architecture $cpu support is not currently maintained."
    echo "The QEMU project intends to remove support for this host CPU in"
    echo "a future release if nobody volunteers to maintain it and to"
    echo "provide a build host for our continuous integration setup."
    echo "configure has succeeded and you can continue to build, but"
    echo "if you care about QEMU on this platform you should contact"
    echo "us upstream at qemu-devel@nongnu.org."
fi

if test "$supported_os" = "no"; then
    echo
    echo "WARNING: SUPPORT FOR THIS HOST OS WILL GO AWAY IN FUTURE RELEASES!"
    echo
    echo "Host OS $targetos support is not currently maintained."
    echo "The QEMU project intends to remove support for this host OS in"
    echo "a future release if nobody volunteers to maintain it and to"
    echo "provide a build host for our continuous integration setup."
    echo "configure has succeeded and you can continue to build, but"
    echo "if you care about QEMU on this platform you should contact"
    echo "us upstream at qemu-devel@nongnu.org."
fi

config_host_mak="config-host.mak"

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

echo all: >> $config_host_mak
echo "prefix=$prefix" >> $config_host_mak
echo "bindir=$bindir" >> $config_host_mak
echo "libdir=$libdir" >> $config_host_mak
echo "libexecdir=$libexecdir" >> $config_host_mak
echo "includedir=$includedir" >> $config_host_mak
echo "sysconfdir=$sysconfdir" >> $config_host_mak
echo "qemu_confdir=$qemu_confdir" >> $config_host_mak
if test "$mingw32" = "no" ; then
  echo "qemu_localstatedir=$local_statedir" >> $config_host_mak
fi
echo "qemu_helperdir=$libexecdir" >> $config_host_mak
echo "qemu_localedir=$qemu_localedir" >> $config_host_mak
echo "libs_cpu=$libs_cpu" >> $config_host_mak
echo "libs_softmmu=$libs_softmmu" >> $config_host_mak
echo "GIT=$git" >> $config_host_mak
echo "GIT_SUBMODULES=$git_submodules" >> $config_host_mak
echo "GIT_UPDATE=$git_update" >> $config_host_mak

echo "ARCH=$ARCH" >> $config_host_mak

if test "$strip_opt" = "yes" ; then
  echo "STRIP=${strip}" >> $config_host_mak
fi
if test "$bigendian" = "yes" ; then
  echo "HOST_WORDS_BIGENDIAN=y" >> $config_host_mak
fi
if test "$mingw32" = "yes" ; then
  echo "CONFIG_WIN32=y" >> $config_host_mak
  rc_version=$(cat $source_path/VERSION)
  version_major=${rc_version%%.*}
  rc_version=${rc_version#*.}
  version_minor=${rc_version%%.*}
  rc_version=${rc_version#*.}
  version_subminor=${rc_version%%.*}
  version_micro=0
  echo "CONFIG_FILEVERSION=$version_major,$version_minor,$version_subminor,$version_micro" >> $config_host_mak
  echo "CONFIG_PRODUCTVERSION=$version_major,$version_minor,$version_subminor,$version_micro" >> $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" >> $config_host_mak
fi
if test "$haiku" = "yes" ; then
  echo "CONFIG_HAIKU=y" >> $config_host_mak
fi
if test "$static" = "yes" ; then
  echo "CONFIG_STATIC=y" >> $config_host_mak
fi
qemu_version=$(head $source_path/VERSION)
echo "VERSION=$qemu_version" >>$config_host_mak
echo "PKGVERSION=$pkgversion" >>$config_host_mak
echo "SRC_PATH=$source_path" >> $config_host_mak
echo "TARGET_DIRS=$target_list" >> $config_host_mak
if test "$sync_file_range" = "yes" ; then
  echo "CONFIG_SYNC_FILE_RANGE=y" >> $config_host_mak
fi
if test "$dup3" = "yes" ; then
  echo "CONFIG_DUP3=y" >> $config_host_mak
fi
if test "$prctl_pr_set_timerslack" = "yes" ; then
  echo "CONFIG_PRCTL_PR_SET_TIMERSLACK=y" >> $config_host_mak
fi
if test "$epoll" = "yes" ; then
  echo "CONFIG_EPOLL=y" >> $config_host_mak
fi
if test "$clock_adjtime" = "yes" ; then
  echo "CONFIG_CLOCK_ADJTIME=y" >> $config_host_mak
fi
if test "$syncfs" = "yes" ; then
  echo "CONFIG_SYNCFS=y" >> $config_host_mak
fi
if test "$sem_timedwait" = "yes" ; then
  echo "CONFIG_SEM_TIMEDWAIT=y" >> $config_host_mak
fi
if test "$strchrnul" = "yes" ; then
  echo "HAVE_STRCHRNUL=y" >> $config_host_mak
fi
if test "$st_atim" = "yes" ; then
  echo "HAVE_STRUCT_STAT_ST_ATIM=y" >> $config_host_mak
fi
if test "$byteswap_h" = "yes" ; then
  echo "CONFIG_BYTESWAP_H=y" >> $config_host_mak
fi
if test "$bswap_h" = "yes" ; then
  echo "CONFIG_MACHINE_BSWAP_H=y" >> $config_host_mak
fi
if test "$have_broken_size_max" = "yes" ; then
    echo "HAVE_BROKEN_SIZE_MAX=y" >> $config_host_mak
fi

if test "$membarrier" = "yes" ; then
  echo "CONFIG_MEMBARRIER=y" >> $config_host_mak
fi
if test "$signalfd" = "yes" ; then
  echo "CONFIG_SIGNALFD=y" >> $config_host_mak
fi
if test "$tcg" = "yes"; then
  echo "CONFIG_TCG=y" >> $config_host_mak
fi
if test "$madvise" = "yes" ; then
  echo "CONFIG_MADVISE=y" >> $config_host_mak
fi
if test "$posix_madvise" = "yes" ; then
  echo "CONFIG_POSIX_MADVISE=y" >> $config_host_mak
fi
if test "$posix_memalign" = "yes" ; then
  echo "CONFIG_POSIX_MEMALIGN=y" >> $config_host_mak
fi

if test "$malloc_trim" = "yes" ; then
  echo "CONFIG_MALLOC_TRIM=y" >> $config_host_mak
fi

if test "$avx2_opt" = "yes" ; then
  echo "CONFIG_AVX2_OPT=y" >> $config_host_mak
fi

if test "$avx512f_opt" = "yes" ; then
  echo "CONFIG_AVX512F_OPT=y" >> $config_host_mak
fi

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

if test "$debug_stack_usage" = "yes" ; then
  echo "CONFIG_DEBUG_STACK_USAGE=y" >> $config_host_mak
fi

if test "$open_by_handle_at" = "yes" ; then
  echo "CONFIG_OPEN_BY_HANDLE=y" >> $config_host_mak
fi

if test "$linux_magic_h" = "yes" ; then
  echo "CONFIG_LINUX_MAGIC_H=y" >> $config_host_mak
fi

if test "$pragma_diagnostic_available" = "yes" ; then
  echo "CONFIG_PRAGMA_DIAGNOSTIC_AVAILABLE=y" >> $config_host_mak
fi

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

if test "$has_environ" = "yes" ; then
  echo "CONFIG_HAS_ENVIRON=y" >> $config_host_mak
fi

if test "$cpuid_h" = "yes" ; then
  echo "CONFIG_CPUID_H=y" >> $config_host_mak
fi

if test "$int128" = "yes" ; then
  echo "CONFIG_INT128=y" >> $config_host_mak
fi

if test "$atomic128" = "yes" ; then
  echo "CONFIG_ATOMIC128=y" >> $config_host_mak
fi

if test "$cmpxchg128" = "yes" ; then
  echo "CONFIG_CMPXCHG128=y" >> $config_host_mak
fi

if test "$atomic64" = "yes" ; then
  echo "CONFIG_ATOMIC64=y" >> $config_host_mak
fi

if test "$attralias" = "yes" ; then
  echo "CONFIG_ATTRIBUTE_ALIAS=y" >> $config_host_mak
fi

if test "$getauxval" = "yes" ; then
  echo "CONFIG_GETAUXVAL=y" >> $config_host_mak
fi

if test "$have_sysmacros" = "yes" ; then
  echo "CONFIG_SYSMACROS=y" >> $config_host_mak
fi

if test "$have_static_assert" = "yes" ; then
  echo "CONFIG_STATIC_ASSERT=y" >> $config_host_mak
fi

if test "$have_utmpx" = "yes" ; then
  echo "HAVE_UTMPX=y" >> $config_host_mak
fi
if test "$have_getrandom" = "yes" ; then
  echo "CONFIG_GETRANDOM=y" >> $config_host_mak
fi

if test "$have_pthread_jit_protect" = "yes" ; then
  echo "HAVE_PTHREAD_JIT_PROTECT=y" >> $config_host_mak
fi

# Hold two types of flag:
#   CONFIG_THREAD_SETNAME_BYTHREAD  - we've got a way of setting the name on
#                                     a thread we have a handle to
#   CONFIG_PTHREAD_SETNAME_NP_W_TID - A way of doing it on a particular
#                                     platform
if test "$pthread_setname_np_w_tid" = "yes" ; then
  echo "CONFIG_THREAD_SETNAME_BYTHREAD=y" >> $config_host_mak
  echo "CONFIG_PTHREAD_SETNAME_NP_W_TID=y" >> $config_host_mak
elif test "$pthread_setname_np_wo_tid" = "yes" ; then
  echo "CONFIG_THREAD_SETNAME_BYTHREAD=y" >> $config_host_mak
  echo "CONFIG_PTHREAD_SETNAME_NP_WO_TID=y" >> $config_host_mak
fi

if test "$ARCH" = "sparc64" ; then
  QEMU_INCLUDES="-iquote \$(SRC_PATH)/tcg/sparc $QEMU_INCLUDES"
elif test "$ARCH" = "s390x" ; then
  QEMU_INCLUDES="-iquote \$(SRC_PATH)/tcg/s390 $QEMU_INCLUDES"
elif test "$ARCH" = "x86_64" || test "$ARCH" = "x32" ; then
  QEMU_INCLUDES="-iquote \$(SRC_PATH)/tcg/i386 $QEMU_INCLUDES"
elif test "$ARCH" = "ppc64" ; then
  QEMU_INCLUDES="-iquote \$(SRC_PATH)/tcg/ppc $QEMU_INCLUDES"
elif test "$ARCH" = "riscv32" || test "$ARCH" = "riscv64" ; then
  QEMU_INCLUDES="-I\$(SRC_PATH)/tcg/riscv $QEMU_INCLUDES"
else
  QEMU_INCLUDES="-iquote \$(SRC_PATH)/tcg/\$(ARCH) $QEMU_INCLUDES"
fi

echo "TOOLS=$tools" >> $config_host_mak
echo "MAKE=$make" >> $config_host_mak
echo "INSTALL=$install" >> $config_host_mak
echo "INSTALL_DIR=$install -d -m 0755" >> $config_host_mak
echo "INSTALL_DATA=$install -c -m 0644" >> $config_host_mak
echo "INSTALL_PROG=$install -c -m 0755" >> $config_host_mak
echo "INSTALL_LIB=$install -c -m 0644" >> $config_host_mak
echo "CC=$cc" >> $config_host_mak
if $iasl -h > /dev/null 2>&1; then
  echo "IASL=$iasl" >> $config_host_mak
fi
echo "HOST_CC=$host_cc" >> $config_host_mak
echo "CXX=$cxx" >> $config_host_mak
echo "OBJCC=$objcc" >> $config_host_mak
echo "AR=$ar" >> $config_host_mak
echo "ARFLAGS=$ARFLAGS" >> $config_host_mak
echo "AS=$as" >> $config_host_mak
echo "CCAS=$ccas" >> $config_host_mak
echo "CPP=$cpp" >> $config_host_mak
echo "OBJCOPY=$objcopy" >> $config_host_mak
echo "LD=$ld" >> $config_host_mak
echo "RANLIB=$ranlib" >> $config_host_mak
echo "NM=$nm" >> $config_host_mak
echo "PKG_CONFIG=$pkg_config_exe" >> $config_host_mak
echo "CFLAGS=$CFLAGS" >> $config_host_mak
echo "CFLAGS_NOPIE=$CFLAGS_NOPIE" >> $config_host_mak
echo "QEMU_CFLAGS=$QEMU_CFLAGS" >> $config_host_mak
echo "QEMU_CXXFLAGS=$QEMU_CXXFLAGS" >> $config_host_mak
echo "QEMU_INCLUDES=$QEMU_INCLUDES" >> $config_host_mak
echo "QEMU_LDFLAGS=$QEMU_LDFLAGS" >> $config_host_mak
echo "LDFLAGS_NOPIE=$LDFLAGS_NOPIE" >> $config_host_mak
echo "LD_REL_FLAGS=$LD_REL_FLAGS" >> $config_host_mak
echo "LD_I386_EMULATION=$ld_i386_emulation" >> $config_host_mak
echo "LIBS+=$LIBS" >> $config_host_mak
echo "LIBS_TOOLS+=$libs_tools" >> $config_host_mak
echo "PTHREAD_LIB=$PTHREAD_LIB" >> $config_host_mak
echo "EXESUF=$EXESUF" >> $config_host_mak
echo "DSOSUF=$DSOSUF" >> $config_host_mak
echo "LDFLAGS_SHARED=$LDFLAGS_SHARED" >> $config_host_mak

for target in $target_list; do
target_dir="$target"
config_target_mak=$target_dir/config-target.mak
target_name=$(echo $target | cut -d '-' -f 1)
target_aligned_only="no"
case "$target_name" in
  alpha|hppa|mips64el|mips64|mipsel|mips|mipsn32|mipsn32el|sh4|sh4eb|sparc|sparc64|sparc32plus|xtensa|xtensaeb)
  target_aligned_only="yes"
  ;;
esac
target_bigendian="no"
case "$target_name" in
  hppa|lm32|m68k|microblaze|mips|mipsn32|mips64|moxie|or1k|ppc|ppc64|ppc64abi32|s390x|sh4eb|sparc|sparc64|sparc32plus|xtensaeb)
  target_bigendian="yes"
  ;;
esac
target_user_only="no"
target_linux_user="no"
target_bsd_user="no"
target_softmmu="yes"

mkdir -p $target_dir
echo "# Automatically generated by configure - do not modify" > $config_target_mak

mttcg="no"

TARGET_ARCH="$target_name"
TARGET_BASE_ARCH=""
TARGET_ABI_DIR=""

case "$target_name" in
  i386)
    mttcg="yes"
    TARGET_SYSTBL_ABI=i386
  ;;
  x86_64)
    TARGET_BASE_ARCH=i386
    TARGET_SYSTBL_ABI=common,64
    mttcg="yes"
  ;;
  alpha)
    mttcg="yes"
    TARGET_SYSTBL_ABI=common
  ;;
  arm)
    TARGET_ARCH=arm
    TARGET_SYSTBL_ABI=common,oabi
    mttcg="yes"
  ;;
  aarch64)
    TARGET_ARCH=aarch64
    TARGET_BASE_ARCH=arm
    mttcg="yes"
  ;;
  cris)
  ;;
  hppa)
    mttcg="yes"
    TARGET_SYSTBL_ABI=common,32
  ;;
  lm32)
  ;;
  m68k)
    TARGET_SYSTBL_ABI=common
  ;;
  microblaze|microblazeel)
    TARGET_ARCH=microblaze
    TARGET_SYSTBL_ABI=common
    echo "TARGET_ABI32=y" >> $config_target_mak
  ;;
  mips|mipsel)
    mttcg="yes"
    TARGET_ARCH=mips
    echo "TARGET_ABI_MIPSO32=y" >> $config_target_mak
    TARGET_SYSTBL_ABI=o32
  ;;
  mipsn32|mipsn32el)
    mttcg="yes"
    TARGET_ARCH=mips64
    TARGET_BASE_ARCH=mips
    echo "TARGET_ABI_MIPSN32=y" >> $config_target_mak
    echo "TARGET_ABI32=y" >> $config_target_mak
    TARGET_SYSTBL_ABI=n32
  ;;
  mips64|mips64el)
    mttcg="no"
    TARGET_ARCH=mips64
    TARGET_BASE_ARCH=mips
    echo "TARGET_ABI_MIPSN64=y" >> $config_target_mak
    TARGET_SYSTBL_ABI=n64
  ;;
  moxie)
  ;;
  nios2)
  ;;
  or1k)
    TARGET_ARCH=openrisc
    TARGET_BASE_ARCH=openrisc
  ;;
  ppc)
    TARGET_SYSTBL_ABI=common,nospu,32
  ;;
  ppc64)
    TARGET_BASE_ARCH=ppc
    TARGET_ABI_DIR=ppc
    TARGET_SYSTBL_ABI=common,nospu,64
    mttcg=yes
  ;;
  ppc64le)
    TARGET_ARCH=ppc64
    TARGET_BASE_ARCH=ppc
    TARGET_ABI_DIR=ppc
    TARGET_SYSTBL_ABI=common,nospu,64
    mttcg=yes
  ;;
  ppc64abi32)
    TARGET_ARCH=ppc64
    TARGET_BASE_ARCH=ppc
    TARGET_ABI_DIR=ppc
    TARGET_SYSTBL_ABI=common,nospu,32
    echo "TARGET_ABI32=y" >> $config_target_mak
  ;;
  riscv32)
    TARGET_BASE_ARCH=riscv
    TARGET_ABI_DIR=riscv
    mttcg=yes
  ;;
  riscv64)
    TARGET_BASE_ARCH=riscv
    TARGET_ABI_DIR=riscv
    mttcg=yes
  ;;
  rx)
    TARGET_ARCH=rx
    target_compiler=$cross_cc_rx
  ;;
  sh4|sh4eb)
    TARGET_ARCH=sh4
    TARGET_SYSTBL_ABI=common
  ;;
  sparc)
    TARGET_SYSTBL_ABI=common,32
  ;;
  sparc64)
    TARGET_BASE_ARCH=sparc
    TARGET_SYSTBL_ABI=common,64
  ;;
  sparc32plus)
    TARGET_ARCH=sparc64
    TARGET_BASE_ARCH=sparc
    TARGET_ABI_DIR=sparc
    TARGET_SYSTBL_ABI=common,32
    echo "TARGET_ABI32=y" >> $config_target_mak
  ;;
  s390x)
    TARGET_SYSTBL_ABI=common,64
    mttcg=yes
  ;;
  tilegx)
  ;;
  tricore)
  ;;
  unicore32)
  ;;
  xtensa|xtensaeb)
    TARGET_ARCH=xtensa
    TARGET_SYSTBL_ABI=common
    mttcg="yes"
  ;;
  *)
    error_exit "Unsupported target CPU"
  ;;
esac
# TARGET_BASE_ARCH needs to be defined after TARGET_ARCH
if [ "$TARGET_BASE_ARCH" = "" ]; then
  TARGET_BASE_ARCH=$TARGET_ARCH
fi

#symlink "$source_path/Makefile.target" "$target_dir/Makefile"

upper() {
    echo "$@"| LC_ALL=C tr '[a-z]' '[A-Z]'
}

target_arch_name="$(upper $TARGET_ARCH)"
echo "TARGET_$target_arch_name=y" >> $config_target_mak
echo "TARGET_NAME=$target_name" >> $config_target_mak
echo "TARGET_BASE_ARCH=$TARGET_BASE_ARCH" >> $config_target_mak
if [ "$TARGET_ABI_DIR" = "" ]; then
  TARGET_ABI_DIR=$TARGET_ARCH
fi
echo "TARGET_ABI_DIR=$TARGET_ABI_DIR" >> $config_target_mak
if [ "$HOST_VARIANT_DIR" != "" ]; then
    echo "HOST_VARIANT_DIR=$HOST_VARIANT_DIR" >> $config_target_mak
fi
if [ "$TARGET_SYSTBL_ABI" != "" ]; then
    echo "TARGET_SYSTBL_ABI=$TARGET_SYSTBL_ABI" >> $config_target_mak
fi

if test "$target_aligned_only" = "yes" ; then
  echo "TARGET_ALIGNED_ONLY=y" >> $config_target_mak
fi
if test "$target_bigendian" = "yes" ; then
  echo "TARGET_WORDS_BIGENDIAN=y" >> $config_target_mak
fi
if test "$target_softmmu" = "yes" ; then
  echo "CONFIG_SOFTMMU=y" >> $config_target_mak
  if test "$mttcg" = "yes" ; then
    echo "TARGET_SUPPORTS_MTTCG=y" >> $config_target_mak
  fi
fi
if test "$target_user_only" = "yes" ; then
  echo "CONFIG_USER_ONLY=y" >> $config_target_mak
fi
if test "$target_linux_user" = "yes" ; then
  echo "CONFIG_LINUX_USER=y" >> $config_target_mak
fi

if test "$target_bsd_user" = "yes" ; then
  echo "CONFIG_BSD_USER=y" >> $config_target_mak
fi


# generate QEMU_CFLAGS/QEMU_LDFLAGS for targets

cflags=""
ldflags=""

case "$ARCH" in
alpha)
  # Ensure there's only a single GP
  cflags="-msmall-data $cflags"
;;
esac

echo "QEMU_LDFLAGS+=$ldflags" >> $config_target_mak
echo "QEMU_CFLAGS+=$cflags" >> $config_target_mak

done # for target in $targets

if test "$ccache_cpp2" = "yes"; then
  echo "export CCACHE_CPP2=y" >> $config_host_mak
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 CPP
preserve_env CXX
preserve_env INSTALL
preserve_env LD
preserve_env LD_LIBRARY_PATH
preserve_env LIBTOOL
preserve_env MAKE
preserve_env NM
preserve_env OBJCOPY
preserve_env PATH
preserve_env PKG_CONFIG
preserve_env PKG_CONFIG_LIBDIR
preserve_env PKG_CONFIG_PATH
preserve_env STRIP

printf "exec" >>config.status
printf " '%s'" "$0" "$@" >>config.status
echo ' "$@"' >>config.status
chmod +x config.status

rm -r "$TMPDIR1"