#
# $Id: configure.ac 5530 2023-08-01 11:00:21Z chrfranke $
#
dnl Process this file with autoconf to produce a configure script.
AC_PREREQ([2.64])
AC_INIT([smartmontools],[7.4],[smartmontools-support@listi.jpberlin.de],[],[https://www.smartmontools.org/])
AM_INIT_AUTOMAKE([1.10 foreign])

# Version of drive database branch
smartmontools_drivedb_version=7.3

# Set by 'do_release' script, commented out when release number is bumped.
smartmontools_release_date=2023-08-01
smartmontools_release_time="10:59:45 UTC"

if test -n "$smartmontools_release_date"; then
  AC_DEFINE_UNQUOTED(SMARTMONTOOLS_RELEASE_DATE, "$smartmontools_release_date",    [smartmontools Release Date])
  AC_DEFINE_UNQUOTED(SMARTMONTOOLS_RELEASE_TIME, "$smartmontools_release_time",    [smartmontools Release Time])
  AC_SUBST(releaseversion, ['${PACKAGE}-${VERSION}'])
else
  # Add "pre-" also on man pages.
  AC_SUBST(releaseversion, ['${PACKAGE}-pre-${VERSION}'])
fi

smartmontools_cvs_tag=`echo '$Id: configure.ac 5530 2023-08-01 11:00:21Z chrfranke $'`
AC_DEFINE_UNQUOTED(SMARTMONTOOLS_CONFIGURE_ARGS, "$ac_configure_args",             [smartmontools Configure Arguments])
AC_DEFINE_UNQUOTED(CONFIG_H_CVSID,               "$smartmontools_cvs_tag",         [smartmontools CVS Tag])

AC_CONFIG_SRCDIR([smartctl.cpp])
AC_CONFIG_HEADERS([config.h])

AM_MAINTAINER_MODE

AC_LANG([C++])
dnl Checks for programs.
AC_PROG_CXX
AM_PROG_AS
AC_PROG_INSTALL

m4_pattern_forbid([^PKG_PROG_])
if test "$cross_compiling" = "no"; then
  m4_ifdef([PKG_PROG_PKG_CONFIG], [PKG_PROG_PKG_CONFIG],
    [AC_MSG_WARN([m4/pkg.m4 missing, systemd detection disabled])])
fi

AC_ARG_VAR(NM, [Symbol list command])
AC_ARG_VAR(WINDMC, [Windows message compiler command])
AC_ARG_VAR(WINDRES, [Windows resource compiler command])
AC_ARG_VAR(MAKENSIS, [NSIS compiler command])

AC_CANONICAL_HOST

AC_CHECK_TOOL(NM, [nm])
case "$host_os" in
  mingw*)
    AC_CHECK_TOOL(WINDMC, [windmc])
    AC_CHECK_TOOL(WINDRES, [windres])
    test -n "$WINDRES" || AC_MSG_ERROR([Missing Windows resource compiler (windres)])

    AC_CHECK_PROG(MAKENSIS, [makensis], [makensis])
    if test -z "$MAKENSIS" && test -n "$PROGRAMFILES"; then
      AC_MSG_CHECKING([for makensis at default install location])
      for x in '' ' (x86)'; do if test -f "${PROGRAMFILES}${x}/NSIS/makensis.exe"; then
        MAKENSIS="${PROGRAMFILES}${x}/NSIS/makensis"; break
      fi; done
      AC_MSG_RESULT([${MAKENSIS:-no}])
    fi
    ;;
esac

AC_MSG_CHECKING([whether reproducible build is selected (SOURCE_DATE_EPOCH)])
res=no
if test -n "$SOURCE_DATE_EPOCH"; then
  res=yes
  test -z "`echo "$SOURCE_DATE_EPOCH" | sed 's,[[0-9]]*,,'`" || res=error
fi
AC_MSG_RESULT([$res])
case $res in
  error) AC_MSG_ERROR([Malformed SOURCE_DATE_EPOCH]) ;;
  yes) CPPFLAGS="${CPPFLAGS}${CPPFLAGS:+ }-DSOURCE_DATE_EPOCH=$SOURCE_DATE_EPOCH" ;;
esac

# Check for SVN.
AC_MSG_CHECKING([whether this is a build from SVN])
is_svn_build=no
svn_deps=
if test -f "$srcdir/.svn/wc.db"; then
  # SVN >= 1.7 working copy
  svn_deps='${srcdir}/.svn/wc.db'
  is_svn_build=unknown
  if (cd "$srcdir" && svn --version && svnversion && svn info) >/dev/null 2>&1; then
    is_svn_build=yes
  fi
fi
AC_SUBST([svn_deps])
AM_CONDITIONAL(IS_SVN_BUILD, [test "$is_svn_build" = "yes"])
AC_MSG_RESULT([$is_svn_build])

# Checks for header files.
AC_CHECK_HEADERS([locale.h])
AC_CHECK_HEADERS([byteswap.h], [], [], [])

case "$host" in
  *-*-freebsd*|*-*-dragonfly*|*-*-kfreebsd*-gnu*)
    # Check for FreeBSD twe and twa include files
    AC_CHECK_HEADERS([sys/tweio.h sys/twereg.h sys/tw_osl_ioctl.h])
    # Check for the FreeBSD CCISS system header and use internal one if not found
    AC_CHECK_HEADERS([dev/ciss/cissio.h],
      [AC_DEFINE([CISS_LOCATION],[<dev/ciss/cissio.h>],[freebsd ciss header location])],
      [AC_DEFINE([CISS_LOCATION],["cissio_freebsd.h"],[freebsd ciss header location])])
    ;;
  *-*-linux*)
    # <linux/compiler.h> is needed for cciss_ioctl.h at least on SuSE LINUX
    AC_CHECK_HEADERS([sys/sysmacros.h linux/compiler.h])
    # Check for Linux CCISS include file
    AC_CHECK_HEADERS([linux/cciss_ioctl.h], [], [], [AC_INCLUDES_DEFAULT
#ifdef HAVE_LINUX_COMPILER_H
# include <linux/compiler.h>
#endif
])
    ;;
  *-*-netbsd*|*-*-openbsd*)
    AC_CHECK_HEADERS([dev/ata/atavar.h])
    ;;
  *-*-mingw*)
    # Older MinGW-w64 (5.0.3) require -lwinpthread
    AC_SEARCH_LIBS([clock_gettime], [winpthread])
    ;;
esac

# Checks for typedefs, and compiler characteristics.
AC_CHECK_TYPES([__int128])
AC_TYPE_LONG_DOUBLE_WIDER

# Checks for library functions.
AC_CHECK_FUNCS([getopt_long], [need_getopt_long=no], [need_getopt_long=yes])
AM_CONDITIONAL(NEED_GETOPT_LONG, [test "$need_getopt_long" = "yes"])

# Check byte ordering (defines WORDS_BIGENDIAN)
AC_C_BIGENDIAN

# check for __attribute__((packed))
# (sizeof() check is required to avoid false positives if other
# __attribute__((x)) are supported)
AC_MSG_CHECKING([whether $CXX supports __attribute__((packed))])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [[
    struct s { char a; short b; } __attribute__((packed));
    typedef char t[sizeof(struct s) == 3 ? 1 : -1];]])],
  [gcc_have_attr_packed=yes], [gcc_have_attr_packed=no])
AC_SUBST(gcc_have_attr_packed)
if test "$gcc_have_attr_packed" = "yes"; then
  AC_DEFINE(HAVE_ATTR_PACKED, 1, [Define to 1 if C++ compiler supports __attribute__((packed))])
fi
AC_MSG_RESULT([$gcc_have_attr_packed])

AC_SUBST(CPPFLAGS)
AC_SUBST(LDFLAGS)
AC_SUBST(ASFLAGS)

initddir=
AC_ARG_WITH(initscriptdir,
  [AS_HELP_STRING([--with-initscriptdir=@<:@DIR|no@:>@], [Location of init scripts [no]])],
  [ case "$withval" in
      auto|yes) AC_MSG_ERROR(['--with-initscriptdir=$withval' is no longer supported]) ;;
      no) ;;
      *) initddir="$withval" ;;
    esac
  ])
AC_SUBST(initddir)
AM_CONDITIONAL(INSTALL_INITSCRIPT, [test -n "$initddir"])

# use different init script templates for different OS
case "${host}" in
  *-*-freebsd*)
    initdfile="smartd.freebsd.initd"
    ;;
  *-apple-darwin*)
    initdfile="com.smartmontools.smartd.plist"
    ;;
  *-*-cygwin*)
    initdfile="smartd.cygwin.initd"
    ;;
  *)
    initdfile="smartd.initd"
    ;;
esac
AC_SUBST(initdfile)

AC_ARG_WITH(exampledir,
  [AS_HELP_STRING([--with-exampledir=DIR], [Location of example scripts [DOCDIR/examplescripts]])],
  [exampledir="$withval"], [exampledir='${docdir}/examplescripts'])
AC_SUBST(exampledir)

drivedbdir='${datadir}/${PACKAGE}'
drivedbinstdir=
AC_ARG_WITH(drivedbinstdir,
  [AS_HELP_STRING([--with-drivedbinstdir@<:@=DIR|yes|no@:>@],
    [Optional separate install location of drive database file [no] (yes=DATADIR/smartmontools)])],
  [ case "$withval" in
      no) ;;
      yes) drivedbinstdir=$drivedbdir; drivedbdir='${localstatedir}/lib/${PACKAGE}' ;;
      *)   drivedbinstdir=$withval;    drivedbdir='${localstatedir}/lib/${PACKAGE}' ;;
    esac
  ])

AC_ARG_WITH(drivedbdir,
  [AS_HELP_STRING([--with-drivedbdir@<:@=DIR|yes|no@:>@],
    [Location of drive database file [DATADIR/smartmontools or LOCALSTATEDIR/lib/smartmontools if separate INSTDIR]])],
  [case "$withval" in yes) ;; no) drivedbdir= ;; *) drivedbdir="$withval" ;; esac])
test -n "$drivedbinstdir" || drivedbinstdir=$drivedbdir
AC_SUBST(drivedbinstdir)
AC_SUBST(drivedbdir)
AM_CONDITIONAL(ENABLE_DRIVEDB, [test -n "$drivedbdir"])

drivedb_version=$smartmontools_drivedb_version
AC_ARG_WITH(update-smart_drivedb,
  [AS_HELP_STRING([--with-update-smart-drivedb@<:@=yes|no|X.Y@:>@],
    [Install update-smart-drivedb script (and backport it to branches/RELEASE_X_Y_DRIVEDB) [yes]])],
  [ case "$withval" in
      yes|no) ;;
      5.4[[0-3]]|6.[[0-6]]|7.[[023]]) drivedb_version=$withval; with_update_smart_drivedb=yes ;;
      *) AC_MSG_ERROR([Invalid drivedb branch version: $withval]) ;;
    esac
  ],
  [with_update_smart_drivedb=yes])
test -n "$drivedbdir" || with_update_smart_drivedb=no
AC_SUBST(with_update_smart_drivedb)
AM_CONDITIONAL(ENABLE_UPDATE_SMART_DRIVEDB, [test "$with_update_smart_drivedb" = "yes"])

gnupg="gpg"
# Also check for '--with-gnupg[=yes]' because 'yes' is a valid command with infinite output
AC_ARG_WITH(gnupg,
  [AS_HELP_STRING([--with-gnupg@<:@=FILE|yes|no@:>@], [GnuPG used to verify drivedb.h [gpg]])],
  [case "$withval" in yes) ;; no) gnupg= ;; *) gnupg="$withval" ;; esac], [])
AC_SUBST(gnupg)

AC_ARG_WITH(smartdscriptdir,
  [AS_HELP_STRING([--with-smartdscriptdir=DIR], [Location of smartd_warning.sh script [SYSCONFDIR]])],
  [smartdscriptdir="$withval"], [smartdscriptdir='${sysconfdir}'])
AC_SUBST(smartdscriptdir)

AC_ARG_WITH(smartdplugindir,
  [AS_HELP_STRING([--with-smartdplugindir=@<:@DIR|no@:>@],
    [Location of smartd_warning.sh plugin scripts [SMARTDSCRIPTDIR/smartd_warning.d]])],
  [smartdplugindir=; test "$withval" != "no" && smartdplugindir="$withval"],
  [smartdplugindir='${smartdscriptdir}/smartd_warning.d'])
AC_SUBST(smartdplugindir)

AC_ARG_WITH(scriptpath,
  [AS_HELP_STRING([--with-scriptpath=@<:@PATH|no@:>@],
    [PATH variable set within scripts [/usr/local/bin:/usr/bin:/bin]])],
  [scriptpath=; test "$withval" != "no" && scriptpath="$withval"],
  [scriptpath="/usr/local/bin:/usr/bin:/bin"])
AC_SUBST(scriptpath)
AM_CONDITIONAL(ENABLE_SCRIPTPATH, [test -n "$scriptpath"])

savestates=
AC_ARG_WITH(savestates,
  [AS_HELP_STRING([--with-savestates@<:@=PREFIX|yes|no@:>@],
    [Enable default smartd state files [no] (yes=LOCALSTATEDIR/lib/smartmontools/smartd.)])],
  [case "$withval" in yes) savestates='${localstatedir}/lib/${PACKAGE}/smartd.' ;;
                      no) ;; *) savestates="$withval" ;; esac])
savestatesdir="${savestates%/*}"
AC_SUBST(savestates)
AC_SUBST(savestatesdir)
AM_CONDITIONAL(ENABLE_SAVESTATES, [test -n "$savestates"])

attributelog=
AC_ARG_WITH(attributelog,
  [AS_HELP_STRING([--with-attributelog@<:@=PREFIX|yes|no@:>@],
    [Enable default smartd attribute log files [no] (yes=LOCALSTATEDIR/lib/smartmontools/attrlog.)])],
  [case "$withval" in yes) attributelog='${localstatedir}/lib/${PACKAGE}/attrlog.' ;;
                      no) ;; *) attributelog="$withval" ;; esac])
attributelogdir="${attributelog%/*}"
AC_SUBST(attributelog)
AC_SUBST(attributelogdir)
AM_CONDITIONAL(ENABLE_ATTRIBUTELOG, [test -n "$attributelog"])

AC_ARG_ENABLE(sample,
  [AS_HELP_STRING([--enable-sample], [Enables appending .sample to the installed smartd rc script and configuration file])],
  [smartd_suffix=; test "$enableval" = "yes" && smartd_suffix=".sample"],
  [smartd_suffix=;])
AC_SUBST(smartd_suffix)

AC_ARG_ENABLE([scsi-cdb-check],
  [AS_HELP_STRING([--enable-scsi-cdb-check], [do sanity check on each SCSI cdb])],
  [ if test "$enableval" = "yes"; then
      AC_DEFINE(SCSI_CDB_CHECK, 1, [Define to 1 to enable check on each SCSI cdb])
    fi
  ],[])

AC_ARG_ENABLE([fast-lebe],
  [AS_HELP_STRING([--disable-fast-lebe], [use generic little-endian/big-endian code instead])],
  [ if test "$enableval" = "no"; then
      AC_DEFINE(IGNORE_FAST_LEBE, 1, [Define to 1 to use generic LE/BE code instead])
    fi
  ],[])

AC_ARG_WITH(os-deps,
  [AS_HELP_STRING([--with-os-deps='os_module.o ...'], [Specify OS dependent module(s) [guessed]])],
  [ for x in $with_os_deps; do
      case $x in
        *.o) ;;
        *) AC_MSG_ERROR([non-object file specified by --with-os-deps]) ;;
      esac
    done
  ],[])

AC_ARG_WITH(selinux,
  [AS_HELP_STRING([--with-selinux@<:@=yes|no@:>@], [Enables SELinux support [no]])],
  [ if test "$withval" = "yes"; then
      AC_CHECK_HEADERS([selinux/selinux.h], [], [AC_MSG_ERROR([Missing SELinux header files])])
      AC_CHECK_LIB(selinux, matchpathcon, [], [AC_MSG_ERROR([Missing or incorrect SELinux library files])])
    fi
  ],[])

AC_ARG_WITH(libcap-ng,
  [AS_HELP_STRING([--with-libcap-ng@<:@=auto|yes|no@:>@], [Add Libcap-ng support to smartd [auto]])],
  [], [with_libcap_ng=auto])

use_libcap_ng=no
case "$with_libcap_ng:$host_os" in
  auto:linux*|yes:*)
    AC_CHECK_HEADERS([cap-ng.h], [AC_CHECK_LIB([cap-ng], [capng_clear],
      [AC_DEFINE(HAVE_LIBCAP_NG, 1,
        [Define to 1 if you have the `cap-ng' library (-lcap-ng).]) dnl `vim syntax
       CAPNG_LDADD="-lcap-ng"; use_libcap_ng=yes],
      [test "$with_libcap_ng" != "yes" || AC_MSG_ERROR([libcap-ng headers found but library is missing])])],
      [test "$with_libcap_ng" != "yes" || AC_MSG_ERROR([Missing libcap-ng header files])])
    ;;
esac
AC_SUBST(CAPNG_LDADD)

AC_ARG_WITH(libsystemd,
  [AS_HELP_STRING([--with-libsystemd@<:@=auto|yes|no@:>@],
    [Add systemd 'Type=notify' support to smartd [auto]])],
  [], [with_libsystemd=auto])

use_libsystemd=no
case "$with_libsystemd:$host_os" in
  auto:linux*|yes:*)
    AC_CHECK_HEADERS([systemd/sd-daemon.h], [AC_CHECK_LIB([systemd], [sd_notify],
      [AC_DEFINE(HAVE_LIBSYSTEMD, 1,
        [Define to 1 if you have the `systemd' library (-lsystemd).]) dnl `vim syntax
       SYSTEMD_LDADD="-lsystemd"; use_libsystemd=yes],
      [test "$with_libsystemd" != "yes" || AC_MSG_ERROR([libsystemd headers found but library is missing])])],
      [test "$with_libsystemd" != "yes" || AC_MSG_ERROR([Missing libsystemd header files])])
    ;;
esac
AC_SUBST(SYSTEMD_LDADD)

AC_ARG_WITH(systemdsystemunitdir,
  [AS_HELP_STRING([--with-systemdsystemunitdir@<:@=DIR|auto|yes|no@:>@], [Location of systemd service files [auto]])],
  [], [with_systemdsystemunitdir=auto])

systemdsystemunitdir=
case "$with_systemdsystemunitdir:$use_libsystemd" in
  auto:yes|yes:yes)
    if test -n "$PKG_CONFIG"; then
      AC_MSG_CHECKING([for systemdsystemunitdir])
      systemdsystemunitdir=`$PKG_CONFIG --variable=systemdsystemunitdir systemd 2>/dev/null`
      AC_MSG_RESULT([${systemdsystemunitdir:-no}])
    fi
    case "$with_systemdsystemunitdir:$sysconfdir:$systemdsystemunitdir" in
      yes:*:) AC_MSG_ERROR([Location of systemd service files not found]) ;;
      yes:*:*|auto:*:|auto:/etc:*) ;;
      *) systemdsystemunitdir='${prefix}'$systemdsystemunitdir ;;
    esac ;;
  auto:*|no:*) ;;
  *:yes) systemdsystemunitdir="$with_systemdsystemunitdir" ;;
  *) AC_MSG_ERROR(['--with-systemdsystemunitdir=$with_systemdsystemunitdir' now requires '--with-libsystemd']) ;;
esac
AC_SUBST(systemdsystemunitdir)
AM_CONDITIONAL(INSTALL_SYSTEMDUNIT, [test -n "$systemdsystemunitdir"])

AC_ARG_WITH(systemdenvfile,
  [AS_HELP_STRING([--with-systemdenvfile@<:@=FILE|auto|yes|no@:>@], [Path of systemd EnvironmentFile [auto]])],
  [], [with_systemdenvfile=auto])

systemdenvfile=
case "$with_systemdenvfile:$cross_compiling:$systemdsystemunitdir" in
  auto:no:?*|yes:*:?*)
    AC_MSG_CHECKING([for path of systemd EnvironmentFile])
    for dir in sysconfig default; do
      if test -d /etc/$dir; then
        systemdenvfile='${sysconfdir}'/$dir/smartmontools
        break
      fi
    done
    AC_MSG_RESULT([${systemdenvfile:-no}])
    case "$with_systemdenvfile:$systemdenvfile" in
      yes:) AC_MSG_ERROR([Path of systemd EnvironmentFile not found]) ;;
    esac ;;
  auto:*|no:*) ;;
  *:*:) AC_MSG_ERROR([Location of systemd service files not found]) ;;
  *) systemdenvfile="$with_systemdenvfile"
esac
AC_SUBST(systemdenvfile)

# TODO: Remove when NVMe support is no longer EXPERIMENTAL
AC_ARG_WITH(nvme-devicescan,
  [AS_HELP_STRING([--with-nvme-devicescan@<:@=yes|no@:>@],
    [Include NVMe devices in smartctl --scan and smartd DEVICESCAN [Darwin,FreeBSD,Linux,Windows:yes;NetBSD:no]])])

# TODO: Remove after smartmontools 7.4
AC_ARG_WITH(signal-func,
  [AS_HELP_STRING([--with-signal-func=@<:@sigaction|sigset|signal@:>@],
    [Function to set signal(2) action [sigaction]])],
  [], [with_signal_func=sigaction])

case "$host:$with_signal_func" in
  *-*-mingw*:*) ;;
  *:sigaction)
    AC_CHECK_FUNCS([sigaction], [], AC_MSG_ERROR([Missing function 'sigaction()'.
Try '--with-signal-func=sigset' or '--with-signal-func=signal'.
Please send info about your system to $PACKAGE_BUGREPORT.])) ;;
  *:sigset)
    AC_CHECK_FUNCS([sigset], [], AC_MSG_ERROR([Missing function 'sigset()'])) ;;
  *:signal) ;;
  *) AC_MSG_ERROR([Invalid option '--with-signal-func=$with_signal_func']) ;;
esac

AC_ARG_WITH(cxx11-option,
  [AS_HELP_STRING([--with-cxx11-option=@<:@OPTION|auto|no@:>@],
    [Compiler option to enable C++11 support, 'no' to skip check [auto]])],
  [], [with_cxx11_option=auto])

# check_cxx_options "MESSAGE" MINVER MAXVER "OPTION..."
check_cxx_options()
{
  AC_MSG_CHECKING([for $CXX option to accept $1])
  res=unknown
  save_CXXFLAGS=$CXXFLAGS
  for option in "" $4; do
    CXXFLAGS="$save_CXXFLAGS $option"
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
      #if __cplusplus < $2 || $3 <= __cplusplus
        #error false
      #endif]])], [res=$option])
    test "$res" = "unknown" || break
  done
  CXXFLAGS=$save_CXXFLAGS
  AC_MSG_RESULT([${res:-none needed}])
}

cxx_missing=
case "$with_cxx11_option" in
  no) ;;
  auto)
    check_cxx_options "C++17" 201703 999999 "-std=gnu++17 -std=gnu++1z -std=c++17 -std=c++1z"
    cxx17_option=$res;
    check_cxx_options "C++14 but not C++17" 201402 201703 "-std=gnu++14 -std=gnu++1y -std=c++14 -std=c++1y"
    cxx14_option=$res;
    case "$cxx17_option:$cxx14_option" in
      unknown:unknown) cxx_missing=14 ;;
      unknown:*)       cxx_missing=17 ;;
    esac
    check_cxx_options "C++11 but not C++14" 201103 201402 "-std=gnu++11 -std=gnu++0x -std=c++11 -std=c++0x"
    test "$res" != "unknown" || res=$cxx14_option
    test "$res" != "unknown" || res=$cxx17_option
    test "$res" != "unknown" || AC_MSG_ERROR([
This script was unable to determine a compiler option to accept C++11.
Use option '--with-cxx11-option=OPTION' to specify a compiler option.
Use option '--without-cxx11-option' to try anyway without this check.
In both cases, please send info about compiler and platform to
$PACKAGE_BUGREPORT - Thanks!])
    CXXFLAGS="$CXXFLAGS${res:+ }$res"
    ;;
  *)
    AC_MSG_CHECKING([whether $CXX $with_cxx11_option accepts C++11])
    CXXFLAGS="$CXXFLAGS${with_cxx11_option:+ }$with_cxx11_option"
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
      #if __cplusplus < 201103
        #error false
      #endif]])], [res=yes], [res=no])
    AC_MSG_RESULT([$res])
    test "$res" = "yes" || AC_MSG_ERROR([$CXX $with_cxx11_option does not accept C++11])
    ;;
esac

case "$host_os: $CPPFLAGS $CXXFLAGS" in
  mingw*:*\ -U__USE_MINGW_ANSI_STDIO\ )
    ;;
  mingw*:*)
    # MinGW 4.6.* did not properly define PRI?64 if __USE_MINGW_ANSI_STDIO is set.
    # MinGW 4.9.* set __USE_MINGW_ANSI_STDIO in first C++ include which may be too late.
    # MinGW 8.0.0 and later may automatically set __USE_MINGW_ANSI_STDIO in certain
    # configurations.  __USE_MINGW_ANSI_STDIO is not needed if the UCRT is used.
    # Make sure __USE_MINGW_ANSI_STDIO or _UCRT is set and fail if format check fails.
    AC_MSG_CHECKING([whether __USE_MINGW_ANSI_STDIO=1 or _UCRT is predefined])
    AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
        #include <stdio.h>
        #if !(__USE_MINGW_ANSI_STDIO == 1 || defined(_UCRT))
          #error fail
        #endif]])],
      [res=yes],
      [res=no; CPPFLAGS="${CPPFLAGS}${CPPFLAGS:+ }-D__USE_MINGW_ANSI_STDIO"])
    AC_MSG_RESULT([$res])
    AC_MSG_CHECKING([whether $CXX supports __USE_MINGW_ANSI_STDIO or UCRT])
    save_CXXFLAGS=$CXXFLAGS
    CXXFLAGS="$CXXFLAGS -Wformat -Werror"
    AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
        #define __STDC_FORMAT_MACROS 1
        #include <inttypes.h>
        #include <stdio.h>
        void f(char * p, size_t s) {
          snprintf(p, s, "%lld %" PRId64, (long long)s, (int64_t)s);
        }]])],
      [res=yes], [res=no])
    AC_MSG_RESULT([$res])
    if test "$res" != "yes"; then
      AC_MSG_ERROR([
This version of $CXX does not support __USE_MINGW_ANSI_STDIO or UCRT.
Use option 'CPPFLAGS=-U__USE_MINGW_ANSI_STDIO' to skip this check.
Please send info about your system to $PACKAGE_BUGREPORT.
])
    fi
    CXXFLAGS=$save_CXXFLAGS
    ;;
esac

AC_ARG_WITH(mingw-aslr,
  [AS_HELP_STRING([--with-mingw-aslr@<:@=auto|yes|low|no@:>@], [Enable ASLR for MinGW executables [auto]])],
  [], [with_mingw_aslr=auto])

LDFLAGS_set=${LDFLAGS+yes}; test "$LDFLAGS_set" = "yes" || LDFLAGS_set=no

# MinGW defaults: link statically and indicate DEP and TS compatibility
case "$host_os:$LDFLAGS_set" in
  mingw*:no) LDFLAGS="-static -Wl,--nxcompat,--tsaware" ;;
esac

# Newer versions of MinGW-w64 toolchain enable ASLR and relocation info by default.
case "$host_os:$with_mingw_aslr:$LDFLAGS_set" in
  mingw*:auto:no)
    AC_MSG_CHECKING([whether this $CXX version enables ASLR by default])
    # Yes: g++ 11.4.0, 12.2.0, clang 15.0.7
    # No: g++ 6.*, 7.3.*
    AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
        #if !(__GNUC__ >= 11 || __clang_major__ >= 15)
          #error fail
        #endif]])],
      [res=yes],[res=no])
    AC_MSG_RESULT([$res])
    test "$res" != "yes" || with_mingw_aslr=default
esac

# ASLR related issues of older MinGW-w64 toolchains and workarounds:
# 1. '--dynamicbase' only sets DYNAMIC_BASE flag but does not enable relocation info:
#    Add '-pie' (works despite 'man ld' says: "... currently only supported on ELF platforms")
# 2. If both '-static' and '-pie' are specified, the entry point is not set properly:
#    Specify entry point with '-emainCRTStartup' or '-e_mainCRTStartup'.
# 3. Some versions of '*-w64-mingw32-g++' ignore '-pie' if '-static' is also specified:
#    Pass '-pie' directly to the linker with '-Wl,-pie'.
# 4. Linkage of some versions of 'libstdc++.a' fail with "relocation overflow" if a high
#    '--image-base' is used: Do not use '--high-entropy-va' in these cases.

case "$host:$with_mingw_aslr:$LDFLAGS_set" in
  x86_64-*-mingw*:auto:no)
    AC_MSG_CHECKING([whether $CXX supports --high-entropy-va])
    save_LDFLAGS=$LDFLAGS
    LDFLAGS="$LDFLAGS -Wl,--dynamicbase,-pie,-emainCRTStartup,--high-entropy-va,--image-base,0x140000000"
    # Link libstdc++ to detect MinGW-w64 problems with high '--image-base'
    AC_LINK_IFELSE([AC_LANG_PROGRAM([[
        #include <string>
        std::string s(42, '.');]])],
      [with_mingw_aslr=yes], [with_mingw_aslr=no])
    LDFLAGS=$save_LDFLAGS
    AC_MSG_RESULT([$with_mingw_aslr])
    test "$with_mingw_aslr" = "yes" || with_mingw_aslr=low
    ;;
  *-*-mingw*:auto:no)
    with_mingw_aslr=yes
    ;;
esac

case "$host:$with_mingw_aslr" in
  x86_64-*-mingw*:yes)
    LDFLAGS="$LDFLAGS -Wl,--dynamicbase,-pie,-emainCRTStartup,--high-entropy-va,--image-base,0x140000000" ;;
  x86_64-*-mingw*:low)
    LDFLAGS="$LDFLAGS -Wl,--dynamicbase,-pie,-emainCRTStartup" ;;
  *-*-mingw*:yes|*-*-mingw*:low)
    LDFLAGS="$LDFLAGS -Wl,--dynamicbase,-pie,-e_mainCRTStartup" ;;
esac

os_win32_manifest=
case "$host" in
  *-*-mingw*)
    # Newer MinGW may add a default manifest
    AC_MSG_CHECKING([whether $CXX adds an application manifest])
    cc_adds_manifest=no
    AC_LINK_IFELSE([AC_LANG_PROGRAM()], [
        if "$WINDRES" -O rc conftest.exe 2>/dev/null | grep '^1.*RT_MANIFEST' >/dev/null 2>&1; then
          cc_adds_manifest=incomplete
          # Manifest must provide a Win 10 compatibility ID
          if "$WINDRES" -O rc conftest.exe 2>/dev/null | grep '{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}' >/dev/null 2>&1; then
            cc_adds_manifest=yes
          fi
        fi],
      [AC_MSG_ERROR([test compile failed])])
    AC_MSG_RESULT([$cc_adds_manifest])
    test "$cc_adds_manifest" = "yes" || os_win32_manifest='os_win32/default.manifest'
    ;;
esac

AC_ARG_WITH(cxx11-regex,
  [AS_HELP_STRING([--with-cxx11-regex@<:@=yes|no@:>@],
    [Use C++11 std::regex instead of POSIX regex(3) [no]])])

need_regex=no
if test "$with_cxx11_regex" = "yes"; then
  AC_DEFINE(WITH_CXX11_REGEX, 1, [Define to 1 to use C++11 std::regex instead of POSIX regex(3)])
else
  AC_CHECK_FUNCS([regcomp], [], [need_regex=yes])
fi
AM_CONDITIONAL(NEED_REGEX, [test "$need_regex" = "yes"])

# TODO: Remove after smartmontools 7.4
AC_ARG_WITH(solaris-sparc-ata,
  [AS_HELP_STRING([--with-solaris-sparc-ata], [(removed)])],
  [AC_MSG_ERROR([
The option '--with@<:@out@:>@-solaris-sparc-ata' is no longer supported.
If you still need legacy ATA support on Solaris SPARC, please inform
$PACKAGE_BUGREPORT.])])

# Set platform-specific modules and symbols
os_libs=
os_dltools='curl wget lynx svn'
os_mailer=mail
os_hostname="'hostname' 'uname -n'"
os_dnsdomainname=
os_nisdomainname="'domainname'"
os_posix=yes
os_darwin=no
os_solaris=no
os_win32=no
os_win32_mingw=no
os_win64=no
os_man_filter=
os_nvme_devicescan=
os_nvme_devicescan_changed=no
case "${host}" in
  *-*-linux*)
    os_deps='os_linux.o cciss.o dev_areca.o'
    os_dnsdomainname="'dnsdomainname' 'hostname -d'"
    os_nisdomainname="'nisdomainname' 'hostname -y' 'domainname'"
    os_man_filter=Linux
    os_nvme_devicescan=yes
    ;;
  *-*-freebsd*|*-*-dragonfly*|*-*-kfreebsd*-gnu*)
    os_deps='os_freebsd.o cciss.o dev_areca.o'
    os_libs='-lcam -lsbuf'
    os_dltools='fetch curl wget lynx svn'
    AC_CHECK_LIB(usb, libusb20_dev_get_device_desc)
    os_man_filter=FreeBSD
    os_nvme_devicescan=yes
    # TODO: Remove after smartmontools 7.4
    os_nvme_devicescan_changed=yes
    ;;
  *-*-solaris*)
    os_deps='os_solaris.o'
    os_mailer='mailx'
    os_solaris=yes
    os_man_filter=Solaris
    ;;
  *-*-netbsd*)
    os_deps='os_netbsd.o'
    os_libs='-lutil'
    os_man_filter=NetBSD
    os_nvme_devicescan=no
    ;;
  *-*-openbsd*)
    os_deps='os_openbsd.o'
    os_libs='-lutil'
    os_dltools='curl wget lynx ftp svn'
    os_man_filter=OpenBSD
    ;;
  *-*-cygwin*)
    os_deps='os_win32.o dev_areca.o'
    os_mailer='email'
    os_hostname="'hostname' 'uname -n' 'echo "'"${HOSTNAME?unset}"'"'"
    os_dnsdomainname="'dnsdomainname' 'hostname -d' 'echo "'"${USERDNSDOMAIN?unset}"'"'"
    os_nisdomainname=
    os_win32=yes
    os_man_filter=Cygwin
    os_nvme_devicescan=yes
    ;;
  x86_64-*-mingw*)
    os_deps='os_win32.o dev_areca.o'
    os_posix=no
    os_win32=yes
    os_win32_mingw=yes
    os_win64=yes
    os_man_filter=Windows
    os_nvme_devicescan=yes
    ;;
  *-*-mingw*)
    os_deps='os_win32.o dev_areca.o'
    os_posix=no
    os_win32=yes
    os_win32_mingw=yes
    os_man_filter=Windows
    os_nvme_devicescan=yes
    ;;
  *-*-darwin*)
    os_deps='os_darwin.o'
    os_libs='-framework CoreFoundation -framework IOKit'
    os_darwin=yes
    os_man_filter=Darwin
    os_nvme_devicescan=yes
    # TODO: Remove after smartmontools 7.4
    os_nvme_devicescan_changed=yes
    ;;
  *-*-nto-qnx*)
    os_deps='os_qnxnto.o'
    ;;
  *-*-os2-*)
    os_deps='os_os2.o'
    os_posix=no
    ;;
  *)
    os_deps='os_generic.o'
    ;;
esac

# Replace if '--with-os-deps' was specified
test -z "$with_os_deps" || os_deps="$with_os_deps"

AC_MSG_CHECKING([whether the OS provides a POSIX API])
if test "$os_posix" = "yes"; then
  AC_DEFINE(HAVE_POSIX_API, 1, [Define to 1 if the OS provides a POSIX API])
fi
AC_MSG_RESULT([$os_posix])

# Check if we need adapter to old interface (dev_legacy.cpp)
os_src=`echo "${os_deps}"|sed -n 's,^\([[^ .]]*\)\.o.*$,\1.cpp,p'`
AC_MSG_CHECKING([whether ${os_src} uses new interface])
if grep "smart_interface" "${srcdir}/${os_src}" >/dev/null 2>&1; then
  os_new_interface=yes
else
  os_new_interface=no
  os_deps="${os_deps} dev_legacy.o"
  AC_DEFINE(OLD_INTERFACE, 1, [Define to 1 if os_*.cpp still uses the old interface])
fi
AC_MSG_RESULT([$os_new_interface])

# TODO: Remove when NVMe support is no longer EXPERIMENTAL
case "$os_nvme_devicescan:${with_nvme_devicescan+set}" in
  no:|yes:)
    AC_MSG_CHECKING([whether NVMe device scanning could be safely enabled])
    with_nvme_devicescan=$os_nvme_devicescan
    AC_MSG_RESULT([$os_nvme_devicescan])
    os_nvme_devicescan=used ;;
esac
AC_SUBST(with_nvme_devicescan)
if test "$with_nvme_devicescan" = "yes"; then
  AC_DEFINE(WITH_NVME_DEVICESCAN, 1, [Define to 1 to include NVMe devices in smartd DEVICESCAN.])
fi

AC_SUBST([os_deps])
AC_SUBST([os_libs])
AC_SUBST([os_dltools])
AC_SUBST([os_mailer])
AC_SUBST([os_hostname])
AC_SUBST([os_dnsdomainname])
AC_SUBST([os_nisdomainname])
AC_SUBST([os_man_filter])
AC_SUBST([os_win32_manifest])

# Create drivedb.h update branch name from version: 5.41[.X] -> RELEASE_5_41_DRIVEDB
DRIVEDB_BRANCH=`echo "$drivedb_version" | sed 's,^\([[0-9]]*\.[[0-9]]*\)\..*$,\1,' \
                | sed -n 's,^\([[0-9]][[0-9]]*\)\.\([[0-9]][[0-9]]*\)$,RELEASE_\1_\2_DRIVEDB,p'`
if test -z "$DRIVEDB_BRANCH"; then
  AC_MSG_ERROR([Unable to create DRIVEDB_BRANCH for version: $drivedb_version])
fi
AC_SUBST([DRIVEDB_BRANCH])

# Enable platform-specific makefile sections
AM_CONDITIONAL(OS_POSIX, [test "$os_posix" = "yes"])
AM_CONDITIONAL(OS_DARWIN, [test "$os_darwin" = "yes"])
AM_CONDITIONAL(OS_SOLARIS, [test "$os_solaris" = "yes"])
AM_CONDITIONAL(OS_WIN32, [test "$os_win32" = "yes"])
AM_CONDITIONAL(OS_WIN32_MINGW, [test "$os_win32_mingw" = "yes"])
AM_CONDITIONAL(OS_WIN64, [test "$os_win64" = "yes"])

if test "$GXX" = "yes"; then
  orig_CXXFLAGS=$CXXFLAGS
  # Add -Wall and -W[extra] if its not already specified
  case " $CXXFLAGS " in
    *\ -Wall\ *) ;;
    *) CXXFLAGS="$CXXFLAGS -Wall" ;;
  esac
  case " $CXXFLAGS " in
    *\ -W\ *|*\ -Wextra\ *) ;;
    *) CXXFLAGS="$CXXFLAGS -W" ;;
  esac
  # Add -Wformat=2 (GCC 3.0),
  # -Werror=return-type (G++ >= 8.0 assumes that control never reaches the end of a non-void function),
  # -fstack-protector[-strong] (GCC 4.1[4.9])
  # if supported and no -W or -f option was set in configure cmdline (TODO: -Wformat-signedness)
  for option in "-Wformat=2" "-Werror=return-type" "-fstack-protector-strong" "-fstack-protector"; do
    case " $orig_CXXFLAGS:$option" in *\ -W*:-W*|*\ -f*:-f*) continue ;; esac
    case " $CXXFLAGS:$option" in *\ -fstack-p*:-fstack-p*) continue ;; esac
    AC_MSG_CHECKING([whether $CXX supports $option])
    save_CXXFLAGS=$CXXFLAGS
    CXXFLAGS="$CXXFLAGS $option"
    # For -fstack-protector*, check that '__stack_chk_*()' functions are available.
    AC_LINK_IFELSE([AC_LANG_PROGRAM([[int i;]],
      [[volatile char buf[10]; buf[i] = 0;]])],
      [res=yes], [res=no; CXXFLAGS=$save_CXXFLAGS])
    AC_MSG_RESULT([$res])
  done
else
  # We are NOT using gcc, so enable host-specific compiler flags
  case "${host}" in
    sparc*-*-solaris*)
      # Tell the Solaris/SPARC C++ compiler about packed ATA structures
      case " $CXXFLAGS" in
        *\ -xmemalign*) ;;
        *) CXXFLAGS="-xmemalign=1i $CXXFLAGS" ;;
      esac ;;
  esac
  case "${host}" in
    *-*-solaris*)
      # Turn on optimization if user has not explicitly set its value
      case " $CXXFLAGS" in
        *\ -xO*) ;;
        *) CXXFLAGS="-xO2 $CXXFLAGS" ;;
      esac
      # Suppress trivial warnings
      case " $CXXFLAGS" in
        *\ -erroff*) ;;
        *) CXXFLAGS="-erroff=%none,wbadinitl,wbadasgl,badargtypel2w,badargtype2w $CXXFLAGS" ;;
      esac ;;
  esac
fi

AC_MSG_CHECKING([whether _FORTIFY_SOURCE is predefined])
# Use COMPILE check to detect compiler presets and C*FLAGS.
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
  #ifndef _FORTIFY_SOURCE
  #error false
  #endif]])], [res=yes], [res=no])
AC_MSG_RESULT([$res])
if test "$res:$NM" = "no:"; then
  AC_MSG_NOTICE([Skipping _FORTIFY_SOURCE support check because 'nm' is missing.])
elif test "$res" = "no"; then
  # Heuristic to check for _FORTIFY_SOURCE=[23] support.
  # Done after check for -fstack-protector because this may add an additional lib.
  # Note: Even if _FORTIFY_SOURCE is present in the include files, it may not be
  # detected here for some reason (disabled for C++, compiler optimization disabled,
  # LDFLAGS include '-s', ...)
  save_CPPFLAGS=$CPPFLAGS
  for level in 3 2; do
    AC_MSG_CHECKING([whether $CXX supports _FORTIFY_SOURCE=$level])
    CPPFLAGS="${CPPFLAGS}${CPPFLAGS:+ }-D_FORTIFY_SOURCE=$level"
    # Use LINK instead of COMPILE to make sure that the required lib is also present.
    AC_LINK_IFELSE([AC_LANG_SOURCE([[
      #include <stdlib.h>
      #include <string.h>
      char buf[42], *p;
      int main(int argc, char **argv) {
      #if _FORTIFY_SOURCE > 2
        p = (char *)malloc(argc * 24);
      #else
        p = buf;
      #endif
        if (argc >= 2) strcpy(p, argv[1]);
        return p[0];
      }]])],
      [res=yes; $NM conftest$EXEEXT 2>/dev/null | grep '_strcpy_chk' >/dev/null 2>&1 || res=no],
      [res=unknown])
    AC_MSG_RESULT([$res])
    test "$res" != "yes" || break
    CPPFLAGS=$save_CPPFLAGS
  done
fi

AC_DEFINE_UNQUOTED(SMARTMONTOOLS_BUILD_HOST,     "${host}",                       [smartmontools Build Host])

AC_SUBST(CXXFLAGS)

AC_CONFIG_FILES(Makefile)
AC_OUTPUT
AC_PROG_MAKE_SET

# Note: Use `...` here as some shells do not properly parse '$(... case $x in X) ...)'
info=`
  echo "-----------------------------------------------------------------------------"
  echo "${PACKAGE}-${VERSION} configuration:"
  echo "host operating system:  $host"
  echo "C++ compiler:           $CXX"
  echo "C compiler:             $CC"
  echo "preprocessor flags:     $CPPFLAGS"
  echo "C++ compiler flags:     $CXXFLAGS"
  echo "C compiler flags:       $CFLAGS"
  echo "linker flags:           $LDFLAGS"
  echo "OS specific modules:    $os_deps $os_libs $LIBS"

  case "$host_os" in
    mingw*)
      echo "application manifest:   ${os_win32_manifest:-[[built-in]]}"
      echo "resource compiler:      $WINDRES"
      echo "message compiler:       ${WINDMC:-[[missing]]}"
      echo "NSIS compiler:          ${MAKENSIS:-[[missing]]}"
      if test -n "$drivedbdir"; then
        echo "drive database file:    EXEDIR/drivedb.h"
        if test -n "$MAKENSIS"; then
          echo "database update script: EXEDIR/update-smart-drivedb.ps1"
        fi
      else
        echo "drive database file:    [[disabled]]"
      fi
      if test -n "$savestates"; then
        echo "smartd save files:      \`eval eval eval echo $savestates\`MODEL-SERIAL.TYPE.state"
      fi
      if test -n "$attributelog"; then
        echo "smartd attribute logs:  \`eval eval eval echo $attributelog\`MODEL-SERIAL.TYPE.csv"
      fi
      echo "NVMe DEVICESCAN:        ${with_nvme_devicescan-no}"
      ;;

    *)
      echo "binary install path:    \`eval eval eval echo $sbindir\`"
      echo "man page install path:  \`eval eval eval echo $mandir\`"
      echo "doc file install path:  \`eval eval eval echo $docdir\`"
      echo "examples install path:  \`eval eval eval echo $exampledir\`"
      if test -n "$drivedbdir"; then
        if test "$drivedbinstdir" != "$drivedbdir"; then
          echo "installed drivedb file: \`eval eval eval echo $drivedbinstdir\`/drivedb.h"
        fi
        echo "drive database file:    \`eval eval eval echo $drivedbdir\`/drivedb.h"
        if test "$with_update_smart_drivedb" = "yes"; then
          echo "database update script: \`eval eval eval echo $sbindir\`/update-smart-drivedb"
          if test "$drivedb_version" = "$smartmontools_drivedb_version"; then
            echo "database update branch: branches/$DRIVEDB_BRANCH"
          else
            echo "... backported to:      branches/$DRIVEDB_BRANCH"
          fi
          echo "download tools:         \`eval eval eval echo $os_dltools\`"
          if test -n "$gnupg"; then
            echo "GnuPG for verification: \`eval eval eval echo $gnupg\`"
          else
            echo "GnuPG for verification: [[disabled]]"
          fi
        else
          echo "database update script: [[disabled]]"
        fi
      else
        echo "drive database file:    [[disabled]]"
      fi
      echo "local drive database:   \`eval eval eval echo $sysconfdir\`/smart_drivedb.h"
      echo "smartd config file:     \`eval eval eval echo $sysconfdir\`/smartd.conf${smartd_suffix}"
      echo "smartd warning script:  \`eval eval eval echo $smartdscriptdir\`/smartd_warning.sh"
      if test -n "$smartdplugindir"; then
        echo "smartd plugin path:     \`eval eval eval echo $smartdplugindir\`"
      else
        echo "smartd plugin path:     [[disabled]]"
      fi
      if test -n "$scriptpath"; then
        echo "PATH within scripts:    \`eval eval eval echo $scriptpath\`"
      else
        echo "PATH within scripts:    [[inherited]]"
      fi
      if test -n "$initddir"; then
        echo "smartd initd script:    \`eval eval eval echo $initddir\`/smartd"
      elif test -z "$systemdsystemunitdir"; then
        echo "smartd initd script:    [[disabled]]"
      fi
      if test -n "$systemdsystemunitdir"; then
        echo "smartd service file:    \`eval eval eval echo $systemdsystemunitdir\`/smartd.service"
        if test -n "$systemdenvfile"; then
          echo "smartd environ file:    \`eval eval eval echo $systemdenvfile\`"
        else
          echo "smartd environ file:    [[disabled]]"
        fi
      fi
      if test -n "$savestates"; then
        echo "smartd save files:      \`eval eval eval echo $savestates\`MODEL-SERIAL.TYPE.state"
      else
        echo "smartd save files:      [[disabled]]"
      fi
      if test -n "$attributelog"; then
        echo "smartd attribute logs:  \`eval eval eval echo $attributelog\`MODEL-SERIAL.TYPE.csv"
      else
        echo "smartd attribute logs:  [[disabled]]"
      fi
      case "$host_os" in
        linux*)
          echo "SELinux support:        ${with_selinux-no}"
          echo "libcap-ng support:      $use_libcap_ng"
          echo "systemd notify support: $use_libsystemd" ;;
      esac
      echo "NVMe DEVICESCAN:        ${with_nvme_devicescan-[[not implemented]]}"
      ;;
  esac
  echo "-----------------------------------------------------------------------------"
`

AC_MSG_NOTICE([
$info
])

# TODO: Remove when NVMe support is no longer EXPERIMENTAL
case "$os_nvme_devicescan:$with_nvme_devicescan:$os_nvme_devicescan_changed" in
  used:yes:yes) AC_MSG_WARN([
The default for the inclusion of NVME devices in smartd.conf
'DEVICESCAN' and 'smartctl --scan' has been changed to 'yes' on
this platform.
Use option '--with-nvme-devicescan' to suppress this warning.
])  ;;
  used:no:*) AC_MSG_WARN([
This version of smartmontools provides NVMe support which is still
EXPERIMENTAL.  NVMe devices are not yet included in smartd.conf
'DEVICESCAN' and 'smartctl --scan' unless '-d nvme' is specified.
Use option '--with-nvme-devicescan' to include NVMe devices.
Use option '--without-nvme-devicescan' to suppress this warning.
])  ;;
  yes:no:*) AC_MSG_WARN([
The default for the inclusion of NVME devices in smartd.conf
'DEVICESCAN' and 'smartctl --scan' is 'yes' on this platform.
If option '--without-nvme-devicescan' is still needed, please inform
$PACKAGE_BUGREPORT - Thanks!
])  ;;
esac

# TODO: Remove after smartmontools 7.4
case "$host:$with_signal_func" in
  *-*-mingw*:*|*:sigaction) ;;
  *) AC_MSG_WARN([
The option '--with-signal-func=$with_signal_func' is deprecated and will be
removed in a future version of smartmontools.  If this option is
still needed, please inform $PACKAGE_BUGREPORT.
]) ;;
esac

case "$host_os:$with_libsystemd:$use_libsystemd:$PKG_CONFIG" in
  linux*:auto:no:?*)
    if $PKG_CONFIG systemd >/dev/null 2>&1; then
      AC_MSG_WARN([
systemd(1) is used on this system but smartd systemd notify support will
not be available because a required library is missing.
Use option '--without-libsystemd' to suppress this warning.
])
    fi ;;
esac

case "$host_os:$WINDMC" in
  mingw*:) AC_MSG_WARN([
The Windows message compiler (windmc) is missing.  The build will work,
but smartd will not contain the MESSAGETABLE required for proper display
of smartd log messages in the Windows event log.
]) ;;
esac

test -z "$cxx_missing" || AC_MSG_WARN([
This version of smartmontools does not use C++14 or C++17 enhancements,
but future versions possibly will.
This script was unable to determine a compiler option to enable C++$cxx_missing.
Please send info about compiler and platform to
$PACKAGE_BUGREPORT - Thanks!])