configure.ac

dnl   configure.ac - Autoconf script for building configure
dnl
dnl   Copyright (C) 2001 Krzysztof Nikiel
dnl   Copyright (C) 2001-2014 Atari800 development team (see DOC/CREDITS)
dnl
dnl   This file is part of the Atari800 emulator project which emulates
dnl   the Atari 400, 800, 800XL, 130XE, and 5200 8-bit computers.
dnl
dnl   Atari800 is free software; you can redistribute it and/or modify
dnl   it under the terms of the GNU General Public License as published by
dnl   the Free Software Foundation; either version 2 of the License, or
dnl   (at your option) any later version.
dnl
dnl   Atari800 is distributed in the hope that it will be useful,
dnl   but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
dnl   GNU General Public License for more details.
dnl
dnl   You should have received a copy of the GNU General Public License
dnl   along with Atari800; if not, write to the Free Software
dnl   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

AC_PREREQ(2.57)
AC_INIT(Atari800, 6.1.0, pstehlik@sophics.cz)
AC_USE_SYSTEM_EXTENSIONS
AC_CONFIG_SRCDIR(src/atari.c)
AC_CONFIG_HEADER(src/config.h)
AC_CONFIG_MACRO_DIR([m4])


dnl Set a8_target...

case "$target" in
    default | falcon | firebee | ps2 | rpi | android | x11 | x11-shm | x11-motif | x11-xview | x11-xview-shm | libatari800)
        a8_target="$target"
        ;;
    shm | motif | xview | xview-shm)
        a8_target="x11-$target"
        ;;
    "")
        a8_target=default
        ;;
    *)
        echo
        echo "Usage: configure [--target=<target>] <other options>"
        echo
        echo "The '--target' option, if not given, defaults to 'default'.  Use '--help'"
        echo "to see other available options, including Atari800 specific '--enable' options."
        echo "Possible values for the '--target' option are:"
        echo "    default          (autodetect available graphics and sound libraries)"
        echo "    android          (Android devices)"
        echo "    falcon           (Atari Falcon: set --host=m68k-atari-mint(elf))"
        echo "    firebee          (FireBee: set --host=m68k-atari-mint(elf))"
        echo "    ps2              (Sony PlayStation 2)"
        echo "    libatari800      (Atari800 as a library (developers only))"
        echo "    x11              (Standard X11)"
        echo "    (x11-)motif      (Motif on X11)"
        echo "    (x11-)shm        (Standard X11 with shared memory extensions)"
        echo "    (x11-)xview      (XView on X11)"
        echo "    (x11-)xview-shm  (XView on X11, with shared memory extensions)"
        echo "Legacy Target:"
        echo "    rpi              (Raspberry Pi. Still available, but works only"
        echo "                     with Stretch and Buster versions of Pi OS."
        echo "                     Depends upon Broadcom libraries, brcmGLESv and"
        echo "                     brcmEGL, which were dropped from Bullseye."
        echo "                     Pis running Bullseye and later may be treated"
        echo "                     as default targets.)"
        exit 1;
        ;;
esac

AC_CANONICAL_HOST
AM_INIT_AUTOMAKE
AM_MAINTAINER_MODE([enable])

dnl Silent rules
# Support silent build rules, requires at least automake-1.11. Disable
# by either passing --disable-silent-rules to configure or passing V=1
# to make
m4_ifdef([AM_SILENT_RULES],[AM_SILENT_RULES([yes])])

WANT_IDE="yes"
WANT_POKEYREC="yes"
SUPPORTS_RDEVICE="yes"
SUPPORTS_NETSIO="yes"

dnl Set a8_host...

if [[ "$host_os" = "cygwin" ]]; then
    CC="gcc -mno-cygwin"
    echo
    echo "Using CC=\"$CC\" to disable cygwin library...";
    echo
    host_os="mingw32"
fi

case $host_os in
    i386-pc-os2-emx)
        a8_host="os/2"
        ;;
    mingw32*)
        a8_host="win"
        if [[ "$a8_target" != "android" ]]; then
            dnl Android target uses normal slashes
            AC_DEFINE(DIR_SEP_BACKSLASH,1,[Define to use back slash as directory separator.])
        fi
        AC_DEFINE(DOS_DRIVES,1,[Define to enable DOS style drives support.])
        ;;
    msdosdjgpp)
        a8_host="dos"
        AC_DEFINE(DIR_SEP_BACKSLASH,1,[Define to use back slash as directory separator.])
        AC_DEFINE(DEFAULT_CFG_NAME,"atari800.cfg",[Alternate config filename due to 8+3 fs limit.])
        AC_DEFINE(DOS_DRIVES,1,[Define to enable DOS style drives support.])
        AC_DEFINE(SYSTEM_WIDE_CFG_FILE,"c:\\atari800.cfg",[Alternate system-wide config file for non-Unix OS.])
        ;;
    linux | linux-gnu)
        a8_host="linux"
        ;;
    darwin*)
        a8_host="macos"
        ;;
    mint)
        if [[ "$a8_target" = "firebee" ]]; then
            a8_host=firebee
            a8_target=default
        else
            a8_host=falcon
        fi
        AC_DEFINE(DIR_SEP_BACKSLASH,1,[Define to use back slash as directory separator.])
        AC_DEFINE(DEFAULT_CFG_NAME,"atari800.cfg",[Alternate config filename due to 8+3 fs limit.])
        AC_DEFINE(DOS_DRIVES,1,[Define to enable DOS style drives support.])
        AC_DEFINE(SYSTEM_WIDE_CFG_FILE,"c:\\atari800.cfg",[Alternate system-wide config file for non-Unix OS.])
        AC_DEFINE(BITPL_SCR,1,[Define to allocate the screen back buffer.])
        WANT_IDE="no"
        ;;
    beos)
        a8_host="beos"
        ;;
    *unix*)
        a8_host="unix"
        ;;
    *)
        a8_host="$host_os"
        ;;
esac


dnl Set CFLAGS and LDFLAGS...

if [[ "X_$CFLAGS" = "X_" ]]; then
    CFLAGS="-O2 -Wall"
fi
if [[ "X_$LDFLAGS" = "X_" ]]; then
    LDFLAGS=""
fi
if [[ "$a8_target" = "ps2" ]]; then
    CC="ee-gcc"
    CFLAGS="$CFLAGS -D_EE -G0 -mno-crt0 -fno-builtin-printf -nostartfiles"
    CFLAGS="$CFLAGS -I${PS2SDK}/common/include -I${PS2SDK}/ee/include"
    CFLAGS="$CFLAGS -I${GSKIT}/ee/dma/include -I${GSKIT}/ee/gs/include"
    CFLAGS="$CFLAGS -I${PS2DEV}/ee/lib/gcc-lib/ee/3.2.2/include"
    CFLAGS="$CFLAGS -I${PS2SDK}/ports/include"
    LDFLAGS="$LDFLAGS -T${PS2SDK}/ee/startup/linkfile"
    LDFLAGS="$LDFLAGS -L${PS2SDK}/ee/lib -L${GSKITSRC}/lib -L${PS2DEV}/ee/lib/gcc-lib/ee/3.2.2"
    LDFLAGS="$LDFLAGS -L${PS2SDK}/ports/lib"
fi
if [[ "$a8_target" = "rpi" ]]; then
    [[ -z "$RPI_SDK" ]] && RPI_SDK="/opt/vc"
    CC="arm-linux-gnueabihf-gcc"
    CFLAGS="$CFLAGS -I${RPI_SDK}/include -I${RPI_SDK}/include/SDL -I${RPI_SDK}/include/interface/vmcs_host/linux -I${RPI_SDK}/include/interface/vcos/pthreads"
    LDFLAGS="$LDFLAGS -Wl,--unresolved-symbols=ignore-in-shared-libs -L${RPI_SDK}/lib"
fi
if [[ "$a8_target" = "android" ]]; then
	AC_NO_EXECUTABLES
	WANT_IDE=no
	with_readline=no
	WANT_EVENT_RECORDING=no
	AC_DEFINE(HAVE_GETTIMEOFDAY,1)
fi
if [[ "$a8_host" = "falcon" ]]; then
    CFLAGS="-m68020-60 -O2 -fomit-frame-pointer -Wall"
    LDFLAGS="-m68020-60"
    SUPPORTS_RDEVICE=no
    SUPPORTS_NETSIO=no
fi
if [[ "$a8_host" = "firebee" ]]; then
    CFLAGS="-mcpu=5475 -O2 -fomit-frame-pointer -Wall"
    LDFLAGS="-mcpu=5475"
    SUPPORTS_RDEVICE=no
    SUPPORTS_NETSIO=no
fi
if [[ "$a8_target" = "libatari800" ]]; then
    with_readline=no
    WANT_EVENT_RECORDING=no
fi

dnl Check for programs...

AC_PROG_CC
AC_PROG_CC_C_O
AC_PROG_INSTALL
AC_PROG_RANLIB
AC_CHECK_TOOLS(WINDRES, [windres], :)


dnl The A8_ADD_INCLUDE_PATH macro searches for include files in subdirectories of
dnl a list of paths plus standard include paths. E.g. /usr/include/PACKAGE/package.h
dnl is not found automatically because only /usr/include is searched, not
dnl /usr/include/PACKAGE. This function takes standard include paths plus any
dnl additional include paths in argument $3 and for each path there, looks in
dnl any existing subdirs specified in argument $4. If found, the subdir is added
dnl to the $CPPFLAGS variable. If not found in any path combination, the code in
dnl $5 is executed.
dnl         $1    = the name of the feature for informational messages
dnl         $2    = header file to use as test for presense
dnl         $3    = the list of possible include directory paths to use as prefixes
dnl                 to the combined path
dnl         $4    = the list of possible include subdirectories
dnl         $5    = code to execute if include not found
AC_DEFUN([A8_ADD_INCLUDE_PATH], [
    AC_CHECK_HEADER([$2],[],[
        _a8_saved_cppflags=$CPPFLAGS
        _a8_found=no
        for _a8_dir in ${prefix}/include $3; do
            for _a8_subdir in $4; do
                _a8_fulldir="$_a8_dir/$_a8_subdir"
                test ! -d "$_a8_fulldir" && continue
                AC_MSG_CHECKING([for $1 headers in])
                AC_MSG_RESULT([$_a8_fulldir])
                AS_UNSET([AS_TR_SH([ac_cv_header_$2])])
                CPPFLAGS="$_a8_saved_cppflags -I$_a8_fulldir"
                AC_CHECK_HEADER([$2],[_a8_found="yes"; break],[])
            done
            if [[ "$_a8_found" = "yes" ]]; then
                break
            fi
        done
        if [[ "$_a8_found" != "yes" ]]; then
            CPPFLAGS=$_a8_saved_cppflags
            $5
        fi
        AS_UNSET(_a8_found)
        AS_UNSET(_a8_dir)
        AS_UNSET(_a8_subdir)
        AS_UNSET(_a8_fulldir)
        AS_UNSET(_a8_saved_cppflags)
    ])
])


AC_DEFUN([AM_PROG_AS], []) dnl dummy to make automake happy, since vasm is used instead
CCAS=vasmm68k_mot
CCASFLAGS="-quiet -devpac -opt-allbra -Faout -underscore"
if echo | $CC -dM -E - | grep __ELF__ > /dev/null; then
CCASFLAGS="-quiet -devpac -opt-allbra -Felf -elfregs"
fi

a8_use_sdl=no
dnl Check if SDL library exists. If it's found, set a8_use_sdl to yes and AC_DEFINE the SDL symbol.
dnl If called multiple times, it will check for the library only once.
dnl Usage: TRY_USE_SDL()
AC_DEFUN([TRY_USE_SDL],
[
    if [[ "$a8_use_sdl" = no ]]; then
        dnl Check for SDL
        SDL_VERSION=1.2.0
        AM_PATH_SDL($SDL_VERSION,
        [
            AC_DEFINE(SDL,1,[Target: SDL library.])
            AC_DEFINE(SUPPORTS_PLATFORM_SLEEP,1,[Platform-specific sleep function.])
            AC_DEFINE(SUPPORTS_PLATFORM_TIME,1,[Platform-specific time function.])
            LIBS="$LIBS $SDL_LIBS"
            CPPFLAGS="$CPPFLAGS $SDL_CFLAGS"
            if [[ "$a8_host" = "win" ]]; then
dnl Defer redefinition of main - do it later, in src/Makefile.am. Otherwise
dnl the autoconf tests would not work.
                CPPFLAGS=${CPPFLAGS/-Dmain=SDL_main/}
dnl Avoid making stdout.txt on Windows sdl target by discarding libSDLmain and
dnl compiling our own src/sdl/SDL_win32_main.c (copied from libSDL dources),
dnl with the NO_STDIO_REDIRECT macro defined.
                LIBS=${LIBS/-lSDLmain/}
                CPPFLAGS="$CPPFLAGS -DNO_STDIO_REDIRECT"
dnl Don't make this a windowed app, make it a console app.
                LIBS=${LIBS/-mwindows/}
            fi
            a8_use_sdl=yes
        ])
    fi
])

a8_use_sdl2=no
dnl Check if SDL2 library exists. If it's found, set a8_use_sdl to yes and AC_DEFINE the SDL2 symbol.
dnl If called multiple times, it will check for the library only once.
dnl Usage: TRY_USE_SDL2()
AC_DEFUN([TRY_USE_SDL2],
[
    if [[ "$a8_use_sdl2" = no ]]; then
        dnl Check for SDL2
        SDL2_VERSION=2.26.0
        AM_PATH_SDL2($SDL2_VERSION,
        [
            AC_DEFINE(SDL2,1,[Target: SDL2 library.])
            AC_DEFINE(SUPPORTS_PLATFORM_SLEEP,1,[Platform-specific sleep function.])
            AC_DEFINE(SUPPORTS_PLATFORM_TIME,1,[Platform-specific time function.])
            LIBS="$LIBS $SDL2_LIBS"
            CFLAGS="$CFLAGS -std=c99"
            CPPFLAGS="$CPPFLAGS $SDL2_CFLAGS"
            if [[ "$a8_host" = "win" ]]; then
dnl Defer redefinition of main - do it later, in src/Makefile.am. Otherwise
dnl the autoconf tests would not work.
                CPPFLAGS=${CPPFLAGS/-Dmain=SDL_main/}
dnl Avoid making stdout.txt on Windows sdl target by discarding libSDLmain and
dnl compiling our own src/sdl/SDL_win32_main.c (copied from libSDL dources),
dnl with the NO_STDIO_REDIRECT macro defined.
                LIBS=${LIBS/-lSDLmain/}
                CPPFLAGS="$CPPFLAGS -DNO_STDIO_REDIRECT"
dnl Don't make this a windowed app, make it a console app.
                LIBS=${LIBS/-mwindows/}
            fi
            a8_use_sdl2=yes
        ])
    fi
])

dnl Check if host os Java NestedVM...
if [[ "$a8_target" != "android" ]]; then
    dnl Android target cannot perform link tests
    AC_MSG_CHECKING([whether host is Java NestedVM])
    AC_LINK_IFELSE(
        [AC_LANG_PROGRAM(
            [[extern int _call_java(int a, int b, int c, int d);]],
            [[_call_java(0, 0, 0, 0);]]
        )],
        [
            a8_host=javanvm
            EXEEXT=".mips"
            enable_unalignedwords=no
            if [[ "$build_os" = "cygwin" ]]; then
                JAVAFLAGS="-classpath '""`cygpath -wp $CLASSPATH`'"
                JAVACFLAGS="-source 1.4 -classpath '""`cygpath -wp $CLASSPATH`'"
            fi
            AC_MSG_RESULT(yes)
        ],
        [
            AC_MSG_RESULT(no)
        ]
    )
fi


dnl Check for header files...

dnl Beware: AC_PATH_X must NOT be inside "case"!
if [[ "$a8_target" != "android" ]]; then
	AC_PATH_X
fi
case "$a8_target" in
    x11*)
        if [[ "X_$x_includes" != "X_" ]]; then
            CFLAGS="$CFLAGS -I$x_includes"
        fi
        if [[ "X_$x_libraries" != "X_" ]]; then
            LDFLAGS="$LDFLAGS -L$x_libraries -Wl,-rpath,$x_libraries"
        fi
        ;;
esac
if [[ "$a8_target" = "android" ]]; then
    echo "hardcoding dirent.h header"
    AC_DEFINE(HAVE_DIRENT_H)
else
    AC_HEADER_DIRENT
fi
AC_HEADER_STDC
AC_HEADER_TIME
AC_TYPE_UINTPTR_T
AC_CHECK_HEADERS([direct.h errno.h file.h signal.h sys/time.h time.h unistd.h unixio.h])
AC_HEADER_TIOCGWINSZ
SUPPORTS_SOUND_OSS=yes
AC_CHECK_HEADERS([fcntl.h sys/ioctl.h sys/soundcard.h],,SUPPORTS_SOUND_OSS=no)
if [[ "$a8_host" = "win" ]]; then
    dnl NetSIO on Windows uses netsiowin.c (Winsock2); SUPPORTS_NETSIO remains yes
    AC_CHECK_HEADERS([windows.h winsock2.h],,SUPPORTS_RDEVICE=no)
else
    AC_CHECK_HEADERS([arpa/inet.h netdb.h netinet/in.h sys/socket.h termios.h],,SUPPORTS_RDEVICE=no; SUPPORTS_NETSIO=no)
fi


dnl Check for libraries...

AC_DEFUN([A8_NEED_LIB],AC_CHECK_LIB($1,main,,AC_MSG_ERROR("$1 library not found!")))
if [[ "$a8_target" = "android" ]]; then
    echo "hardcoding libz"
    LIBS="-lz $LIBS"
    AC_DEFINE(HAVE_LIBZ)
    SUPPORTS_LIBZ="yes"
    dnl libm is automatically appended by the build system
elif [[ "$a8_target" = "libatari800" ]]; then
    AC_CHECK_LIB(m,cos,[LIBS="-lm $LIBS"])
    AC_CHECK_FUNCS(setjmp)
    SUPPORTS_LIBZ="no"
else
    dnl needs SUPPORTS_LIBZ shell variable for file_export test below
	AC_CHECK_LIB(z,gzopen,[SUPPORTS_LIBZ=yes],[SUPPORTS_LIBZ=no])
    if [[ "$SUPPORTS_LIBZ" = "yes" ]]; then
        AC_DEFINE(HAVE_LIBZ,1,[Supports zlib compression library.])
        LIBS="-lz $LIBS"
    fi

    dnl Need SUPPORTS_LIBPNG shell variable for PNG video codec test below
	AC_CHECK_LIB(png,png_get_libpng_ver,[SUPPORTS_LIBPNG=yes],[SUPPORTS_LIBPNG=no])
    if [[ "$SUPPORTS_LIBPNG" = "yes" ]]; then
        AC_DEFINE(HAVE_LIBPNG,1,[Supports PNG image compression library.])
    fi

	AC_CHECK_LIB(m,cos,[LIBS="-lm $LIBS"])
	AC_CHECK_LIB(ossaudio,_oss_ioctl,[LIBS="-lossaudio $LIBS"])

	dnl Check for libcurl (download feature)
	AC_ARG_ENABLE(download,AC_HELP_STRING([--disable-download],[Disable download support (default=auto)]),,enable_download=auto)
	WANT_DOWNLOAD=no
	if [[ "$enable_download" != "no" ]]; then
		AC_CHECK_HEADER([curl/curl.h],
			[AC_CHECK_LIB([curl],[curl_easy_init],
				[AC_DEFINE(HAVE_DOWNLOAD,1,[Enable download feature.])
				 LIBS="-lcurl $LIBS"
				 WANT_DOWNLOAD=yes],
				[if [[ "$enable_download" = "yes" ]]; then AC_MSG_FAILURE([curl library not found]); fi])],
			[if [[ "$enable_download" = "yes" ]]; then AC_MSG_FAILURE([curl/curl.h not found]); fi])
	fi
fi

case "$a8_target" in
    default)
        if [[ "$a8_host" != "dos" ]]; then
dnl In DJGPP building with zlib fails with -ansi.
            CFLAGS="$CFLAGS -ansi"
        fi
        CFLAGS="$CFLAGS -pedantic -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Winline"
        if [[ "$a8_host" != "beos" ]]; then
dnl BeOS has a real issue with redundant-decls
            CFLAGS="$CFLAGS -Wredundant-decls"
        fi
        ;;
    falcon)
        AC_DEFINE(SUPPORTS_PLATFORM_SLEEP,1,[Platform-specific sleep function.])
        AC_DEFINE(SUPPORTS_PLATFORM_TIME,1,[Platform-specific time function.])
        AC_DEFINE(SUPPORTS_PLATFORM_CONFIGINIT,1,[Platform-specific default values.])
        AC_DEFINE(FALCON,1,[Target: Atari Falcon system.])
        AC_CHECK_LIB(gem, appl_init)
        ;;
    ps2)
        AC_DEFINE(PS2,1,[Target: Sony PlayStation 2.])
        AC_DEFINE(SUPPORTS_PLATFORM_SLEEP,1,[Platform-specific sleep function.])
        AC_DEFINE(SUPPORTS_PLATFORM_TIME,1,[Platform-specific time function.])
        AC_DEFINE(DEFAULT_CFG_NAME,"mc0:/ATARI/ATARI800.CFG",[Alternate config filename due to 8+3 fs limit.])
        A8_NEED_LIB(kernel)
	A8_NEED_LIB(audsrv)
        A8_NEED_LIB(debug)
        A8_NEED_LIB(syscall)
        A8_NEED_LIB(dmakit)
        A8_NEED_LIB(gskit)
        A8_NEED_LIB(pad)
        A8_NEED_LIB(kbd)
        A8_NEED_LIB(mc)
        A8_NEED_LIB(g)
        A8_NEED_LIB(z)
        A8_NEED_LIB(c)
        ;;
    rpi)
        AC_DEFINE(RPI,1,[Target: Raspberry Pi.])
        AC_DEFINE(GUI_SDL,1,[Use SDL for graphics and input.])
        AC_DEFINE(SUPPORTS_PLATFORM_CONFIGURE,1,[Additional config file options.])
        AC_DEFINE(SUPPORTS_PLATFORM_CONFIGSAVE,1,[Save additional config file options.])
        AC_DEFINE(SUPPORTS_PLATFORM_PALETTEUPDATE,1,[Update the Palette if it changed.])
        AC_DEFINE(PLATFORM_MAP_PALETTE,1,[Platform-specific mapping of RGB palette to display surface.])
        A8_NEED_LIB(brcmGLESv2)
        A8_NEED_LIB(brcmEGL)
        A8_NEED_LIB(SDL)
        A8_NEED_LIB(bcm_host)
        ;;
    android)
        AC_DEFINE(ANDROID,1,[Target: Android])
        AC_DEFINE(SUPPORTS_PLATFORM_PALETTEUPDATE,1,[Update the Palette if it changed.])
        AC_DEFINE(DIRTYRECT,1,[Define to use dirty screen partial repaints.])
        dnl AC_DEFINE(NODIRTYCOMPARE,1,[Define to skip memory comparisons - Requires DIRTYRECT.])
        ;;
    libatari800)
        AC_DEFINE(LIBATARI800,1,[Target: Atari800 as a library.])
        AC_DEFINE(SUPPORTS_PLATFORM_CONFIGURE,1,[Additional config file options.])
        ;;
    x11*)
        AC_DEFINE(X11,1,[Target: Standard X11.])
        AC_DEFINE(SUPPORTS_PLATFORM_PALETTEUPDATE,1,[Update the Palette if it changed.])
        A8_NEED_LIB(X11)
        case "$a8_target" in
            *-shm)
                AC_DEFINE(SHM,1,[Target: X11 with shared memory extensions.])
                A8_NEED_LIB(Xext)
                ;;
        esac
        case "$a8_target" in
            x11-xview*)
                AC_DEFINE(XVIEW,1,[Target: X11 with XView.])
                dnl Dunno if this is the right way...
                CFLAGS="$CFLAGS -I/usr/openwin/include"
                dnl -lxview must come before -lolgx, otherwise it does not link.
                dnl Note that AC_CHECK_LIB (and therefore A8_NEED_LIB) _prepends_
                dnl the found library to LIBS.
                A8_NEED_LIB(olgx)
                A8_NEED_LIB(xview)
                ;;
            x11-motif)
                AC_DEFINE(MOTIF,1,[Target: X11 with Motif.])
                dnl According to the information I was able to find,
                dnl "-lgen -lsocket" is necessary only with old Sun Motif libs.
                AC_CHECK_LIB(socket,main,[LIBS="-lsocket $LIBS"])
                AC_CHECK_LIB(gen,main,[LIBS="-lgen $LIBS"])
                dnl -lXm must come before -lXt, otherwise I get the following
                dnl fatal error at runtime, when calling XtVaCreateManagedWidget:
                dnl X Error of failed request:  BadWindow (invalid Window parameter)
                dnl See MOTIF FAQ "What order should the libraries be linked in?"
                dnl Note that AC_CHECK_LIB (and therefore A8_NEED_LIB) _prepends_
                dnl the found library to LIBS.
                A8_NEED_LIB(Xt)
                A8_NEED_LIB(Xm)
                ;;
        esac
        WANT_X11=yes
        ;;
esac

AM_CONDITIONAL([CONFIGURE_HOST_JAVANVM], test "$a8_host" = javanvm)
AM_CONDITIONAL([CONFIGURE_HOST_DOS], test "$a8_host" = dos)
AM_CONDITIONAL([CONFIGURE_HOST_WIN], test "$a8_host" = win)
AM_CONDITIONAL([CONFIGURE_TARGET_ANDROID], test "$a8_target" = android)
AM_CONDITIONAL([CONFIGURE_TARGET_FALCON], test "$a8_target" = falcon)
AM_CONDITIONAL([CONFIGURE_TARGET_PS2], test "$a8_target" = ps2)
AM_CONDITIONAL([CONFIGURE_TARGET_RPI], test "$a8_target" = rpi)
AM_CONDITIONAL([CONFIGURE_TARGET_LIBATARI800], test "$a8_target" = libatari800)
AM_CONDITIONAL([CONFIGURE_TARGET_X11], test "$WANT_X11" = yes)


dnl Check for typedefs, structures, and compiler characteristics...

AC_C_BIGENDIAN
AC_C_CONST
AC_C_INLINE
AC_C_VOLATILE
AC_PROG_GCC_TRADITIONAL
AC_STRUCT_TM
AC_TYPE_SIGNAL
AC_TYPE_SIZE_T


dnl Set usage of unaligned word accesses...

AC_ARG_ENABLE(unalignedwords,AC_HELP_STRING(--enable-unalignedwords,[Override usage of unaligned words]))
if [[ "$enable_unalignedwords" != "yes" -a "$enable_unalignedwords" != "no" ]]; then
    case $host_cpu in
        alpha* | arm* | hppa* | ia64 | mips* | sparc*)
            enable_unalignedwords=no
            ;;
        i*86 | m68* | powerpc* | x86_64)
            enable_unalignedwords=yes
            ;;
        *)
            AC_MSG_WARN([$host_cpu architecture is unknown to this script.])
            AC_MSG_WARN([Performance may be sub-optimal. Please contact Atari800 developers.])
            enable_unalignedwords=no
            ;;
    esac
fi

if [[ "$enable_unalignedwords" = "yes" ]]; then
    dnl Make sure it is allowed
    AC_MSG_CHECKING([for unaligned word access validity])
    AC_RUN_IFELSE(
        [AC_LANG_PROGRAM([[#include <stdio.h>]],[[
            unsigned char test_data[] = "Hello, I test unaligned word access validity.";
            unsigned char *p;
            /* step through test_data as far as 4 bytes are available via p */
            for (p = test_data; p[2] != '\0'; p++) {
                unsigned int word_read = *(unsigned short *) p;
                if (word_read != (p[0] + (p[1] << 8))
                 && word_read != (p[1] + (p[0] << 8))) {
                    printf("16-bit access at address %p yields bad data!\n"
                           "Bytes: %02X %02X; Value read: %04X\n",
                           p, p[0], p[1], word_read);
                    return 1;
                }
                word_read = *(unsigned int *) p;
                if (word_read != (p[0] + (p[1] << 8) + (p[2] << 16) + (p[3] << 24))
                 && word_read != (p[3] + (p[2] << 8) + (p[1] << 16) + (p[0] << 24))) {
                    printf("32-bit access at address %p yields bad data!\n"
                           "Bytes: %02X %02X %02X %02X; Value read: %08X\n",
                           p, p[0], p[1], p[2], p[3], word_read);
                    return 1;
                }
            }
        ]])],
        AC_MSG_RESULT([yes]),
        [enable_unalignedwords=no; AC_MSG_RESULT([failed! disabling unaligned word access])],
        AC_MSG_RESULT([skipped because cross-compiling])
    )
    if [[ "$enable_unalignedwords" = "yes" ]]; then
        AC_DEFINE(WORDS_UNALIGNED_OK,1,[Define if unaligned word access is ok.])
    fi
fi


dnl Check for library functions...

# from "Autoconf Archive":
AC_DEFUN([AX_FUNC_MKDIR],
[AC_CHECK_FUNCS([mkdir _mkdir])
AC_CACHE_CHECK([whether mkdir takes one argument],
               [ac_cv_mkdir_takes_one_arg],
[AC_TRY_COMPILE([
#include <sys/stat.h>
#if HAVE_UNISTD_H
#  include <unistd.h>
#endif
], [mkdir (".");],
[ac_cv_mkdir_takes_one_arg=yes], [ac_cv_mkdir_takes_one_arg=no])])
if test x"$ac_cv_mkdir_takes_one_arg" = xyes; then
  AC_DEFINE([MKDIR_TAKES_ONE_ARG], 1,
            [Define if mkdir takes only one argument.])
fi
])

AC_FUNC_CLOSEDIR_VOID
AC_FUNC_MEMCMP
AC_FUNC_SELECT_ARGTYPES
AC_FUNC_STAT
if [[ "$a8_target" = "android" ]]; then
    echo "hardcoding libc funcs"
    AC_DEFINE(HAVE_VPRINTF) AC_DEFINE(HAVE_ATEXIT) AC_DEFINE(HAVE_CHMOD) AC_DEFINE(HAVE_FDOPEN)
    AC_DEFINE(HAVE_FFLUSH) AC_DEFINE(HAVE_FLOOR) AC_DEFINE(HAVE_FSTAT) AC_DEFINE(HAVE_GETCWD)
    AC_DEFINE(HAVE_GETTIMEOFDAY) AC_DEFINE(HAVE_LOCALTIME) AC_DEFINE(HAVE_MEMMOVE) AC_DEFINE(HAVE_MEMSET)
    AC_DEFINE(HAVE_MKSTEMP) AC_DEFINE(HAVE_MKTEMP) AC_DEFINE(HAVE_MODF) AC_DEFINE(HAVE_NANOSLEEP)
    AC_DEFINE(HAVE_OPENDIR) AC_DEFINE(HAVE_RENAME) AC_DEFINE(HAVE_REWIND) AC_DEFINE(HAVE_RMDIR)
    AC_DEFINE(HAVE_SIGNAL) AC_DEFINE(HAVE_SNPRINTF) AC_DEFINE(HAVE_STAT) AC_DEFINE(HAVE_STRCASECMP)
    AC_DEFINE(HAVE_STRCHR) AC_DEFINE(HAVE_STRDUP) AC_DEFINE(HAVE_STRERROR) AC_DEFINE(HAVE_STRRCHR)
    AC_DEFINE(HAVE_STRSTR) AC_DEFINE(HAVE_STRTOL) AC_DEFINE(HAVE_SYSTEM) AC_DEFINE(HAVE_TIME)
    AC_DEFINE(HAVE_TMPNAM) AC_DEFINE(HAVE_UCLOCK) AC_DEFINE(HAVE_UNLINK)
    AC_DEFINE(HAVE_VSNPRINTF) AC_DEFINE(HAVE_MKDIR)
    AC_DEFINE(HAVE_SELECT) AC_DEFINE(HAVE_USLEEP) AC_DEFINE(HAVE_STRNCPY)
	dnl Leave out tmpfile to force creation of temp files to external
else
    AC_FUNC_VPRINTF
    AC_CHECK_FUNCS([atexit chmod clock fdopen fflush floor fstat getcwd])
    AC_CHECK_FUNCS([gettimeofday localtime memmove memset mkstemp mktemp])
    AC_CHECK_FUNCS([modf nanosleep opendir rename rewind rmdir signal snprintf])
    AC_CHECK_FUNCS([stat strcasecmp strchr strdup strerror strrchr strstr])
    AC_CHECK_FUNCS([strtol system time tmpfile tmpnam uclock unlink vsnprintf popen])
    AX_FUNC_MKDIR
	dnl select usleep strncpy are broken on the NestedVM host
    if test "x$a8_host" != xjavanvm ; then
        AC_CHECK_FUNCS([select usleep strncpy])
    fi
fi
if [[ "$a8_host" != "win" -a "$a8_target" != "android" ]]; then
    AC_CHECK_FUNCS([gethostbyaddr gethostbyname inet_ntoa socket],,SUPPORTS_RDEVICE=no; SUPPORTS_NETSIO=no)
fi

dnl Select/detect video interface.

AC_ARG_WITH([video],
    [AC_HELP_STRING([--with-video@<:@=no|yes|curses|ncurses|pdcurses|dosvga|sdl|sdl2|javanvm@:>@],[Select video interface to use @<:@default=check@:>@])],
    [
        case "$withval" in
            no | yes | check | curses | ncurses | pdcurses | dosvga | sdl | sdl2 | javanvm)
                ;;
            *)
                AC_MSG_ERROR([unrecognized value for --with-video: "$withval"])
                ;;
        esac
    ],
    [with_video=check])

if [[ "$a8_target" = default ]]; then
    if [[ "$with_video" != no ]]; then
        if [[ "$with_video" = check -o "$with_video" = yes -o "$with_video" = javanvm ]]; then
            if [[ "$a8_host" = javanvm ]]; then
                with_video=javanvm
            elif [[ "$with_video" = javanvm ]]; then
                AC_MSG_ERROR([--with-video=javanvm was given, but host system is not NestedVM!])
            fi
        fi
        if [[ "$with_video" = check -o "$with_video" = yes -o "$with_video" = dosvga ]]; then
            if [[ "$a8_host" = dos ]]; then
                with_video=dosvga
            elif [[ "$with_video" = dosvga ]]; then
                AC_MSG_ERROR([--with-video=dosvga was given, but host system is not DOS!])
            fi
        fi
        if [[ "$with_video" = check -o "$with_video" = yes -o "$with_video" = sdl2 ]]; then
            TRY_USE_SDL2()
            if [[ "$a8_use_sdl2" = yes ]]; then
                with_video=sdl2
            elif [[ "$with_video" = sdl2 ]]; then
                AC_MSG_FAILURE([--with-video=sdl2 was given, but SDL2 library not found!])
            fi
        fi
        if [[ "$with_video" = check -o "$with_video" = yes -o "$with_video" = sdl ]]; then
            TRY_USE_SDL()
            if [[ "$a8_use_sdl" = yes ]]; then
                with_video=sdl
            elif [[ "$with_video" = sdl ]]; then
                AC_MSG_FAILURE([--with-video=sdl was given, but SDL library not found!])
            fi
        fi
        if [[ "$with_video" = check -o "$with_video" = yes -o "$with_video" = curses ]]; then
            AC_CHECK_LIB([curses], [initscr],
                [LIBS="-lcurses $LIBS"
                 with_video=curses
                ],
                [if [[ "$with_video" = curses ]]; then
                    AC_MSG_FAILURE([--with-video=curses was given, but curses library not found!])
                 fi
                ])
        fi
        if [[ "$with_video" = check -o "$with_video" = yes -o "$with_video" = ncurses ]]; then
            AC_CHECK_LIB([ncurses], [initscr],
                [LIBS="-lncurses $LIBS"
                 with_video=ncurses
                 AC_DEFINE(USE_NCURSES,1,[Target: Ncurses library.])
                ],
                [if [[ "$with_video" = ncurses ]]; then
                    AC_MSG_FAILURE([--with-video=ncurses was given, but ncurses library not found!])
                 fi
                ])
        fi
        if [[ "$with_video" = check -o "$with_video" = yes -o "$with_video" = pdcurses ]]; then
            AC_CHECK_LIB([pdcurses], [initscr],
                [LIBS="-lpdcurses $LIBS"
                 with_video=pdcurses
                ],
                [if [[ "$with_video" = pdcurses ]]; then
                    AC_MSG_FAILURE([--with-video=pdcurses was given, but pdcurses library not found!])
                 fi
                ])
        fi
    fi
    if [[ "$with_video" = check ]]; then
        with_video=no
    fi
    case "$with_video" in
        javanvm)
            AC_DEFINE(SUPPORTS_PLATFORM_PALETTEUPDATE,1,[Update the Palette if it changed.])
            AC_DEFINE(SUPPORTS_PLATFORM_SLEEP,1,[Platform-specific sleep function.])
            ;;
        sdl2)
            AC_DEFINE(GUI_SDL,1,[Use SDL for graphics and input.])
            AC_DEFINE(SUPPORTS_PLATFORM_CONFIGINIT,1,[Platform-specific default values.])
            AC_DEFINE(SUPPORTS_PLATFORM_CONFIGURE,1,[Additional config file options.])
            AC_DEFINE(SUPPORTS_PLATFORM_CONFIGSAVE,1,[Save additional config file options.])
            AC_DEFINE(SUPPORTS_PLATFORM_PALETTEUPDATE,1,[Update the Palette if it changed.])
            AC_DEFINE(SUPPORTS_CHANGE_VIDEOMODE,1,[Can change video modes on the fly.])
            AC_DEFINE(SUPPORTS_ROTATE_VIDEOMODE,1,[Can display the screen rotated sideways.])
            AC_DEFINE(PLATFORM_MAP_PALETTE,1,[Platform-specific mapping of RGB palette to display surface.])
            WANT_XEP80_EMULATION=yes
            WANT_NTSC_FILTER=yes
            WANT_PAL_BLENDING=yes
            AC_DEFINE(PBI_PROTO80,1,[A prototype 80 column card for the 1090 expansion box.])
            AC_DEFINE(AF80,1,[The Austin Franklin 80 column card.])
            AC_DEFINE(BIT3,1,[The Bit3 Full View 80 column card.])
            ;;
        sdl)
            AC_DEFINE(GUI_SDL,1,[Use SDL for graphics and input.])
            AC_DEFINE(SUPPORTS_PLATFORM_CONFIGINIT,1,[Platform-specific default values.])
            AC_DEFINE(SUPPORTS_PLATFORM_CONFIGURE,1,[Additional config file options.])
            AC_DEFINE(SUPPORTS_PLATFORM_CONFIGSAVE,1,[Save additional config file options.])
            AC_DEFINE(SUPPORTS_PLATFORM_PALETTEUPDATE,1,[Update the Palette if it changed.])
            AC_DEFINE(SUPPORTS_CHANGE_VIDEOMODE,1,[Can change video modes on the fly.])
            AC_DEFINE(SUPPORTS_ROTATE_VIDEOMODE,1,[Can display the screen rotated sideways.])
            AC_DEFINE(PLATFORM_MAP_PALETTE,1,[Platform-specific mapping of RGB palette to display surface.])
            WANT_XEP80_EMULATION=yes
            WANT_NTSC_FILTER=yes
            WANT_PAL_BLENDING=yes
            AC_DEFINE(PBI_PROTO80,1,[A prototype 80 column card for the 1090 expansion box.])
            AC_DEFINE(AF80,1,[The Austin Franklin 80 column card.])
            AC_DEFINE(BIT3,1,[The Bit3 Full View 80 column card.])
            ;;
        dosvga)
            AC_DEFINE(DOSVGA,1,[Target: DOS VGA.])
            AC_DEFINE(SUPPORTS_PLATFORM_CONFIGURE,1,[Additional config file options.])
            AC_DEFINE(SUPPORTS_PLATFORM_PALETTEUPDATE,1,[Update the Palette if it changed.])
            ;;
        curses | ncurses | pdcurses)
            AC_DEFINE(USE_CURSES,1,[Target: Curses-compatible library.])
            WANT_EVENT_RECORDING=no
            ;;
        no)
            AC_DEFINE(BASIC,1,[Target: standard I/O.])
            WANT_EVENT_RECORDING=no
            ;;
        *)
            AC_MSG_ERROR([--with-video=$with_video was given, but no video/input library found!])
            ;;
    esac
fi
AM_CONDITIONAL(WITH_VIDEO_JAVANVM, test "$with_video" = javanvm)
AM_CONDITIONAL(WITH_VIDEO_SDL, test "$with_video" = sdl)
AM_CONDITIONAL(WITH_VIDEO_SDL2, test "$with_video" = sdl2)
AM_CONDITIONAL(WITH_VIDEO_DOSVGA, test "$with_video" = dosvga)
AM_CONDITIONAL(WITH_VIDEO_CURSES, test "$with_video" = curses -o "$with_video" = ncurses -o "$with_video" = pdcurses)
AM_CONDITIONAL(WITH_VIDEO_LIBATARI800, test "$a8_target" = libatari800)
AM_CONDITIONAL(WITH_VIDEO_NO, test "$with_video" = no)


dnl Select optional Atari800 features...

dnl The A8_OPTION macro automates the calling of AC_ARG_ENABLE, AC_HELP_STRING and AC_DEFINE.
dnl         $1    = the name of the feature, what follows "--enable-".
dnl         $2    = "yes" or "no", determines if feature defaults to being active or not.
dnl         $3    = The right side of the help line.
dnl                 The left side is always "--enable-$1".
dnl         $4    = The symbol name which goes to config.h, the C #define symbol.
dnl                 A symbol called "WANT_$4" is defined for use in this configure.ac.
dnl         $5    = The help string which shows up in config.h for the $4 symbol.
AC_DEFUN([A8_OPTION],[
    AC_ARG_ENABLE($1,AC_HELP_STRING(--enable-$1,$3),WANT_$4=$enableval,WANT_$4=$2)
    if [[ "$WANT_$4" = "yes" ]]; then
        AC_DEFINE($4,1,$5)
    fi
])

if [[ "$a8_target" = "libatari800" ]]; then
    WANT_NEW_CYCLE_EXACT=yes
    WANT_VERY_SLOW=no
    WANT_CRASH_MENU=no
    WANT_CURSES_BASIC=no
elif [[ "$a8_target" != "default" -o "$with_video" != no ]]; then

    case "$with_video" in
        *curses)
            A8_OPTION(cursesbasic,yes,
                      [No bitmap graphics emulation (curses targets only) (default=ON)],
                      CURSES_BASIC,[Define to disable bitmap graphics emulation in CURSES target.]
                     )
            ;;
    esac

    if [[ "$WANT_CURSES_BASIC" != "yes" ]]; then

        A8_OPTION(newcycleexact,yes,
                  [Allow color changes inside a scanline (default=ON)],
                  NEW_CYCLE_EXACT,[Define to allow color changes inside a scanline.]
                 )
        if [[ "$WANT_NEW_CYCLE_EXACT" = "yes" ]]; then
            CCASFLAGS="$CCASFLAGS -DNEW_CYCLE_EXACT"
        fi

        A8_OPTION(veryslow,no,
                  [Use very slow computer support (use with the -refresh option) (default=OFF)],
                  VERY_SLOW,[Define to use very slow computer support (faster -refresh).]
                 )

    fi

    A8_OPTION(crashmenu,yes,
              [Display a menu after a CIM instruction (default=ON)],
              CRASH_MENU,[Define to activate crash menu after CIM instruction.]
             )
    if [[ "$WANT_CRASH_MENU" = "yes" ]]; then
        CCASFLAGS="$CCASFLAGS -DCRASH_MENU"
    fi
fi
AM_CONDITIONAL([WANT_CURSES_BASIC], test "$WANT_CURSES_BASIC" = "yes")
AM_CONDITIONAL([WANT_NEW_CYCLE_EXACT], test "$WANT_NEW_CYCLE_EXACT" = "yes")

A8_OPTION(pagedattrib,no,
          [Use page-based attribute array (default=OFF)],
          PAGED_ATTRIB,[Define to use page-based attribute array.]
         )

A8_OPTION(cyclesperopcode,no,
          [Update ANTIC counter in each opcode's emulation (default=OFF)],
          CYCLES_PER_OPCODE,[Define to update ANTIC counter in each opcode's emulation.]
         )

if [[ "$a8_target" = libatari800 ]]; then
    WANT_BUFFERED_LOG=yes
    AC_DEFINE(BUFFERED_LOG,1,[Define to use buffered debug output.])
else
    A8_OPTION(bufferedlog,no,
          [Use buffered debug output (until the graphics mode switches back to text mode) (default=OFF)],
          BUFFERED_LOG,[Define to use buffered debug output.]
         )
fi

A8_OPTION(altirra_bios,yes,
      [Use Altirra OS to allow operation when real ROMs are not available (default=ON)],
      EMUOS_ALTIRRA,[Define to use Altirra emulated OS when real ROMs are not available.]
     )

AM_CONDITIONAL([WANT_EMUOS_ALTIRRA], test "$WANT_EMUOS_ALTIRRA" = "yes")

if [[ "$a8_target" = libatari800 ]]; then
    WANT_MONITOR_ASSEMBLER=no
    WANT_MONITOR_BREAK=no
    WANT_MONITOR_BREAKPOINTS=no
    WANT_MONITOR_HINTS=no
    WANT_MONITOR_PROFILE=no
    WANT_MONITOR_TRACE=no
    WANT_MONITOR_ANSI=no
    WANT_MONITOR_UTF8=no
else
    A8_OPTION(monitorasm,yes,
              [Provide an assembler in the monitor (default=ON)],
              MONITOR_ASSEMBLER,[Define to activate assembler in monitor.]
             )

    A8_OPTION(monitorbreak,yes,
              [Support code breakpoints and execution history (slower emulation) (default=ON)],
              MONITOR_BREAK,[Define to activate code breakpoints and execution history.]
             )
    if [[ "$WANT_MONITOR_BREAK" = "yes" ]]; then
        CCASFLAGS="$CCASFLAGS -DMONITOR_BREAK"
    fi

    A8_OPTION(monitorbreakpoints,no,
              [Support user-defined breakpoints (default=OFF)],
              MONITOR_BREAKPOINTS,[Define to activate user-defined breakpoints.]
             )

    A8_OPTION(monitorhints,yes,
              [Provide hints in the disassembler (human-readable address labels) (default=ON)],
              MONITOR_HINTS,[Define to activate hints in disassembler.]
             )

    A8_OPTION(monitorprofile,no,
              [6502 opcode profiling (default=OFF)],
              MONITOR_PROFILE,[Define to activate 6502 opcode profiling.]
             )
    if [[ "$WANT_MONITOR_PROFILE" = "yes" ]]; then
        CCASFLAGS="$CCASFLAGS -DMONITOR_PROFILE"
    fi

    A8_OPTION(monitortrace,no,
              [Support TRACE command in the monitor (default=OFF)],
              MONITOR_TRACE,[Define to activate TRACE command in monitor.]
             )

    A8_OPTION(monitoransi,yes,
              [Support ANSI terminal control (default=ON)],
              MONITOR_ANSI,[Define to use ANSI terminal control in the monitor.]
             )

    A8_OPTION(monitorutf8,yes,
              [Support UTF-8 for printing ATASCII characters in the monitor (default=ON)],
              MONITOR_UTF8,[Define to use UTF-8 in the monitor.]
             )
fi

if [[ "$WANT_EVENT_RECORDING" != "no" ]]; then
dnl we already checked for libz and added it to LIBS
    AC_CHECK_LIB(z,adler32,
              [A8_OPTION(eventrecording,yes,
                    [Support event recording (default=ON)],
                    EVENT_RECORDING,[Define to enable event recording.]
                   )],
              WANT_EVENT_RECORDING="no"
             )
fi

A8_OPTION(pbi_mio,yes,
      [Emulate the MIO board (default=ON)],
      PBI_MIO,[Define to emulate the MIO board.]
     )
AM_CONDITIONAL([WANT_PBI_MIO], test "$WANT_PBI_MIO" = "yes")

A8_OPTION(pbi_bb,yes,
      [Emulate the Black Box (default=ON)],
      PBI_BB,[Define to emulate the Black Box.]
     )
AM_CONDITIONAL([WANT_PBI_BB], test "$WANT_PBI_BB" = "yes")

if [[ "$SUPPORTS_NETSIO" = "yes" ]]; then
A8_OPTION(netsio,yes,
       [Support NetSIO Protocol I/O interface (FujiNet) (default=ON)],
       NETSIO,[Define to enable NetSIO Protocol/FujiNet support.]
       )
fi
AM_CONDITIONAL([WANT_NETSIO], test "$WANT_NETSIO" = "yes")

if test "x$WANT_NETSIO" = "xyes"; then
    if test "x$a8_host" != "xwin"; then
        AC_CHECK_LIB([pthread], [pthread_create], [], [AC_MSG_ERROR([pthread library not found])])
    else
        dnl Windows NetSIO uses Winsock2 (netsiowin.c), not pthread
        A8_NEED_LIB(ws2_32)
    fi
    AC_DEFINE([NETSIO], [1], [Define to enable NetSIO (FujiNet) support])
    CFLAGS="$CFLAGS -DNETSIO"
    AC_SUBST([CFLAGS])
fi

dnl Select/detect sound interface.

AC_ARG_WITH([sound],
    [AC_HELP_STRING([--with-sound@<:@=no|yes|dossb|oss|falcon|sdl|sdl2|javanvm@:>@],[Select sound interface to use @<:@default=check@:>@])],
    [
        case "$withval" in
            no | yes | check | dossb | oss | falcon | sdl | sdl2 | javanvm)
                ;;
            *)
                AC_MSG_ERROR([unrecognized value for --with-sound: "$withval"])
                ;;
        esac
    ],
    [with_sound=check])

if [[ "$a8_target" = libatari800 ]]; then
    if [[ "$with_sound" = check -o "$with_sound" = yes ]]; then
        with_sound=libatari800
        WANT_SOUND_CALLBACK=no
        WANT_CONSOLE_SOUND=yes
    else
        AC_MSG_ERROR([--with-audio option not needed to build libatari800!])
    fi
elif [[ "$a8_target" != "ps2" -a "$a8_target" != "android" ]]; then
    if [[ "$with_sound" != no ]]; then
        if [[ "$with_sound" = check -o "$with_sound" = yes -o "$with_sound" = javanvm ]]; then
            if [[ "$a8_host" = javanvm ]]; then
                with_sound=javanvm
            elif [[ "$with_sound" = javanvm ]]; then
                AC_MSG_ERROR([--with-sound=javanvm was given, but host system is not NestedVM!])
            fi
        fi
        if [[ "$with_sound" = check -o "$with_sound" = yes -o "$with_sound" = falcon ]]; then
            if [[ "$a8_host" = falcon -o "$a8_host" = firebee ]]; then
                with_sound=falcon
            elif [[ "$with_sound" = falcon ]]; then
                AC_MSG_ERROR([--with-sound=falcon was given, but host system is not Falcon!])
            fi
        fi
        if [[ "$with_sound" = check -o "$with_sound" = yes -o "$with_sound" = dossb ]]; then
            if [[ "$a8_host" = dos ]]; then
                with_sound=dossb
            elif [[ "$with_sound" = dossb ]]; then
                AC_MSG_ERROR([--with-sound=dossb was given, but host system is not DOS!])
            fi
        fi
        if [[ "$with_sound" = check -o "$with_sound" = yes -o "$with_sound" = sdl2 ]]; then
            TRY_USE_SDL2()
            if [[ "$a8_use_sdl2" = yes ]]; then
                with_sound=sdl2
            elif [[ "$with_sound" = sdl2 ]]; then
                AC_MSG_FAILURE([--with-sound=sdl2 was given, but SDL2 library not found!])
            fi
        fi
        if [[ "$with_sound" = check -o "$with_sound" = yes -o "$with_sound" = sdl ]]; then
            TRY_USE_SDL()
            if [[ "$a8_use_sdl" = yes ]]; then
                with_sound=sdl
            elif [[ "$with_sound" = sdl ]]; then
                AC_MSG_FAILURE([--with-sound=sdl was given, but SDL library not found!])
            fi
        fi
        if [[ "$with_sound" = check -o "$with_sound" = yes -o "$with_sound" = oss ]]; then
            if [[ "$SUPPORTS_SOUND_OSS" = yes ]]; then
                with_sound=oss
            elif [[ "$with_sound" = oss ]]; then
                AC_MSG_ERROR([--with-sound=oss was given, but OSS is not supported!])
            fi
        fi
    fi
    if [[ "$with_sound" = check ]]; then
        with_sound=no
    fi
    case "$with_sound" in
        sdl)
            WANT_SOUND_CALLBACK=yes
            ;;
        sdl2)
            WANT_SOUND_CALLBACK=yes
            ;;
        falcon)
            AC_DEFINE(POKEYSND_SIGNED_SAMPLES,1,[Use 8-bit signed samples.])
            ;;
        dossb)
            WANT_SOUND_CALLBACK=yes
            ;;
        no)
            ;;
        *)
            AC_MSG_ERROR([--with-sound=$with_sound was given, but no sound library found!])
            ;;
    esac
fi
AM_CONDITIONAL([WITH_SOUND], test "$with_sound" != no)
AM_CONDITIONAL([WITH_SOUND_JAVANVM], test "$with_sound" = javanvm)
AM_CONDITIONAL([WITH_SOUND_FALCON], test "$with_sound" = falcon)
AM_CONDITIONAL([WITH_SOUND_OSS], test "$with_sound" = oss)
AM_CONDITIONAL([WITH_SOUND_SDL], test "$with_sound" = sdl)
AM_CONDITIONAL([WITH_SOUND_SDL2], test "$with_sound" = sdl2)
AM_CONDITIONAL([WITH_SOUND_DOSSB], test "$with_sound" = dossb)
AM_CONDITIONAL([WITH_SOUND_LIBATARI800], test "$with_sound" = libatari800)
AM_CONDITIONAL([A8_USE_SDL], test "$a8_use_sdl" = yes)
AM_CONDITIONAL([A8_USE_SDL2], test "$a8_use_sdl2" = yes)

dnl Set sound support options...

if [[ "$with_sound" != no ]]; then

    AC_DEFINE(SOUND, 1, [Define to activate sound support.])

    if [[ "$WANT_SOUND_CALLBACK" = "yes" ]]; then
        AC_DEFINE(SOUND_CALLBACK,1,[Platform updates sound buffer by callback function.])
    fi

    A8_OPTION(nonlinear_mixing,yes,
              [Use nonlinear mixing on high fidelity POKEY (default=ON)],
              NONLINEAR_MIXING,[Define to use nonlinear mixing on high fidelity POKEY.]
             )

    A8_OPTION(interpolatesound,yes,
              [Use sound interpolation (default=ON)],
              INTERPOLATE_SOUND,[Define to allow sound interpolation.]
             )

    A8_OPTION(stereosound,yes,
              [Use stereo sound (default=ON)],
              STEREO_SOUND,[Define to allow stereo sound.]
             )

    A8_OPTION(consolesound,yes,
              [Use console sound (keyboard clicks) (default=ON)],
              CONSOLE_SOUND,[Define to allow console sound (keyboard clicks).]
             )

    A8_OPTION(clipsound,no,
              [Use sound clipping (default=OFF)],
              CLIP_SOUND,[Define to allow sound clipping.]
             )
    A8_OPTION(pbi_xld,yes,
              [Emulate 1450XLD (default=ON)],
              PBI_XLD,[Define to emulate the 1400XL/1450XLD.]
             )
    A8_OPTION(voicebox,yes,
              [Emulate the Alien Group Voice Box (default=ON)],
              VOICEBOX,[Define to emulate the Alien Group Voice Box.]
             )
    A8_OPTION(audiorecording,"yes",
            [Support audio recording to sound or AVI files (default=ON)],
            AUDIO_RECORDING,[Define to enable support for audio recording to files.]
            )

    if [[ "$WANT_AUDIO_RECORDING" = "yes" ]]; then
        supported_audio_codecs="pcm adpcm mulaw"
        AC_ARG_WITH(mp3,
            [AC_HELP_STRING(--with-mp3@<:@=no|yes|lame@:>@,[Select mp3 audio @<:@default=check@:>@])],
            [
                case "$withval" in
                    no | yes | check | lame)
                        ;;
                    *)
                        AC_MSG_ERROR([unrecognized value for --with-mp3: "$withval"])
                        ;;
                esac
            ],
            [with_mp3=check])
        if [[ "$with_mp3" != "no" ]]; then
            if [[ "$with_mp3" = check -o "$with_mp3" = yes -o "$with_mp3" = lame ]]; then
                AC_CHECK_LIB(mp3lame, lame_init, [
                    A8_ADD_INCLUDE_PATH([lame],[lame.h],[/usr/include /usr/local/include],[lame],[
                        if [[ "$with_mp3" = yes -o "$with_mp3" = "lame" ]]; then
                            AC_MSG_ERROR([lame.h not found, modify CPPFLAGS or use --with-mp3=check])
                        fi
                        with_mp3="no"
                    ])
                    if [[ $with_mp3 != no ]]; then
                        LIBS="-lmp3lame $LIBS"
                        AC_DEFINE(AUDIO_CODEC_MP3,1,[Supports mp3 audio])
                        supported_audio_codecs="$supported_audio_codecs mp3"
                        with_mp3="libmp3lame"
                    fi
                ], [
                    if [[ "$with_mp3" = yes -o "$with_mp3" = "lame" ]]; then
                        AC_MSG_ERROR([unable to find libmp3lame, modify LDFLAGS or use --with-mp3=check])
                    fi
                    with_mp3="no"
                ])
            fi
        fi
    else
        with_mp3="no"
    fi
else
    WANT_NONLINEAR_MIXING="no"
    WANT_INTERPOLATE_SOUND="no"
    WANT_STEREO_SOUND="no"
    WANT_CONSOLE_SOUND="no"
    WANT_CLIP_SOUND="no"
    WANT_PBI_XLD_SOUND="no"
    WANT_AUDIO_RECORDING="no"
    WANT_AUDIO_CODEC_MP3="no"
fi
AM_CONDITIONAL([WANT_PBI_XLD], test "$WANT_PBI_XLD" = "yes")
AM_CONDITIONAL([WANT_VOICEBOX], test "$WANT_VOICEBOX" = "yes")
AM_CONDITIONAL([WANT_PBI_XLD_OR_VOICEBOX], test "$WANT_PBI_XLD" = "yes" -o "$WANT_VOICEBOX" = "yes")
AM_CONDITIONAL([WANT_PBI_MIO_OR_BB], test "$WANT_PBI_MIO" = "yes" -o "$WANT_PBI_BB" = "yes")
AM_CONDITIONAL([WITH_AUDIO_CODECS], test "$WANT_AUDIO_RECORDING" = "yes")
AM_CONDITIONAL([WITH_AUDIO_CODEC_MP3], test "$with_mp3" != "no")

if [[ "$with_video" != no -a "$WANT_CURSES_BASIC" != yes ]]; then
    A8_OPTION(videorecording,"yes",
            [Support video recording to AVI files (default=ON)],
            VIDEO_RECORDING,[Define to enable support for AVI video/audio recording.]
            )
    A8_OPTION(screenshots,"yes",
            [Support saving screenshots to files (default=ON)],
            SCREENSHOTS,[Define to enable support for screenshot file saving.]
            )
    if [[ "$WANT_SCREENSHOTS" = "yes" ]]; then
        supported_image_formats="pcx"
        if [[ "$SUPPORTS_LIBPNG" = "yes" ]]; then
            supported_image_formats="$supported_image_formats png"
        fi
    fi
    if [[ "$WANT_SCREENSHOTS" = "yes" -o "WANT_VIDEO_RECORDING" = "yes" ]]; then
        if [[ "$SUPPORTS_LIBPNG" = "yes" ]]; then
            LIBS="$LIBS -lpng"
        fi
    fi
else
    WANT_VIDEO_RECORDING="no"
    WANT_SCREENSHOTS="no"
fi

AM_CONDITIONAL([WITH_MULTIMEDIA], test "$WANT_AUDIO_RECORDING" = "yes" -o "$WANT_VIDEO_RECORDING" = "yes")
AM_CONDITIONAL([WITH_IMAGE_CODECS], test "$WANT_SCREENSHOTS" = "yes" -o "$WANT_VIDEO_RECORDING" = "yes")
AM_CONDITIONAL([WITH_IMAGE_CODEC_PNG], test "$SUPPORTS_LIBPNG" = "yes")

dnl file_export.c is needed when sound is enabled (for WAV recording) or when AVI recording
dnl is enabled, or for screenshots when screen.c is compiled into the code.
AM_CONDITIONAL([WITH_FILE_EXPORT], test "$WANT_AUDIO_RECORDING" = "yes" -o "$WANT_VIDEO_RECORDING" = "yes" -o "$WANT_SCREENSHOTS" = "yes" -o "$SUPPORTS_LIBZ" = "yes")

dnl Set video recording configuration options

if [[ "$WANT_VIDEO_RECORDING" = "yes" ]]; then
    supported_video_codecs="rle"
    if [[ "$SUPPORTS_LIBPNG" = "yes" ]]; then
        A8_OPTION(pngcodec,"yes",
                [Support PNG video codec (default=ON)],
                VIDEO_CODEC_PNG,[Define to enable support for PNG video codec.]
                )
        if [[ "$WANT_VIDEO_CODEC_PNG" = "yes" ]]; then
            supported_video_codecs="$supported_video_codecs png"
        fi
    else
        WANT_VIDEO_CODEC_PNG=no
    fi
    A8_OPTION(zmbvcodec,"yes",
            [Support ZMBV video codec (default=ON)],
            VIDEO_CODEC_ZMBV,[Define to enable support for ZMBV video codec.]
            )
    if [[ "$WANT_VIDEO_CODEC_ZMBV" = "yes" ]]; then
        supported_video_codecs="$supported_video_codecs zmbv"
    fi
fi

AM_CONDITIONAL([WITH_VIDEO_CODECS], test "$WANT_VIDEO_RECORDING" = "yes")
AM_CONDITIONAL([WITH_VIDEO_CODEC_PNG], test "$WANT_VIDEO_RECORDING" = "yes" -a "$WANT_VIDEO_CODEC_PNG" = "yes")
AM_CONDITIONAL([WITH_VIDEO_CODEC_ZMBV], test "$WANT_VIDEO_RECORDING" = "yes" -a "$WANT_VIDEO_CODEC_ZMBV" = "yes")

A8_OPTION(ide,$WANT_IDE,
          [Provide IDE emulation (default=ON)],
          IDE,[Define to add IDE harddisk emulation.]
         )
if [[ "$WANT_IDE" = "yes" ]]; then
    AC_SYS_LARGEFILE
    AC_FUNC_FSEEKO
fi
AM_CONDITIONAL([WANT_IDE], test "$WANT_IDE" = "yes")

A8_OPTION(pokeyrec,$WANT_POKEYREC,
          [Provide Pokey registers recording (default=ON)],
          POKEYREC,[Define to add Pokey registers recording.]
         )
if [[ "$WANT_POKEYREC" = "yes" ]]; then
    AC_SYS_LARGEFILE
fi
AM_CONDITIONAL([WANT_POKEYREC], test "$WANT_POKEYREC" = "yes")

if [[ "$a8_use_sdl" = yes ]]; then
    A8_OPTION(onscreenkeyboard,no,
              [Enable on-screen keyboard (default=OFF)],
              USE_UI_BASIC_ONSCREEN_KEYBOARD,[Define to enable on-screen keyboard.]
             )
fi

dnl Select/detect features based on external software...

dnl Check for existence of the readline library and headers.
AC_ARG_WITH(readline,
    [AC_HELP_STRING(--with-readline,[Use libreadline for input in monitor @<:@default=check@:>@])],
    [],
    [with_readline=check])

if [[ "$with_readline" != no ]]; then
dnl Readline uses termcap internally. Termcap's functionality is nowadays
dnl provided by several libraries (eg. ncurses). However, on some environments,
dnl Readline is not linked to a Termcap-providing library at compile-time.
dnl So, we check whether Readline is already linked to such library, by checking
dnl existence of the tgetent symbol in readline. If not, we search for tgetent
dnl in a few other libraries. All done with a single AC_SEARCH_LIBS statement.
    have_readline=no
    AC_SEARCH_LIBS(tgetent, [readline termcap ncursesw ncurses curses], [
        AC_SEARCH_LIBS(readline, readline, [
            AC_CHECK_HEADER([readline/readline.h], [
                have_readline=yes
            ], [
                if [[ "$with_readline" = yes ]]; then
                    AC_MSG_ERROR([unable to use libreadline  - readline/readline.h not found or not compilable.])
                fi
            ])
        ], [
            if [[ "$with_readline" = yes ]]; then
                AC_MSG_ERROR([unable to link libreadline  - the library is not installed on this system.])
            fi
        ])
    ], [
        if [[ "$with_readline" = yes ]]; then
            AC_MSG_ERROR([unable to properly link libreadline - a library \
providing termcap functionality is not found. Try installing one of ncursew, \
ncurses, curses, termcap.])
        fi
    ])
    with_readline=$have_readline
fi

if [[ "$with_readline" = yes ]]; then
    AC_DEFINE(MONITOR_READLINE, 1, [Define to activate readline support in monitor.])
fi

dnl Check for availability of the OpenGL header.
AC_ARG_WITH(opengl,
    AC_HELP_STRING(--with-opengl,[Build support for OpenGL hardware video acceleration - only in SDL target @<:@default=check@:>@]),
    [],
    [with_opengl=check])

dnl Check both sdl and sdl2
if [[ "$a8_target" != default -o \( "$with_video" != sdl -a "$with_video" != sdl2 \) ]]; then
    if [[ "$with_opengl" = "yes" ]]; then
        AC_MSG_ERROR([option --with-opengl only supported with --target=default --with-video=sdl!])
    fi
    with_opengl=no
fi

if [[ "$with_opengl" != no ]]; then
    have_opengl=no
    AC_CHECK_HEADER([SDL_opengl.h], [
        have_opengl=yes
    ], [
        if [[ "$with_opengl" = yes ]]; then
            AC_MSG_ERROR([unable to use OpenGL  - SDL_opengl.h not found or not compilable.])
        fi
    ])
    with_opengl=$have_opengl
fi

dnl The opengl-by-default option was created in PR #118 to allow packages to be built
dnl for the Raspberry Pi 4 which would install and run properly without the user having
dnl to turn on acceleration by hand.  The need for this disappeared in Pi OS Bullseye
dnl with the introduction of an efficient KMS video driver, but the option remains, and
dnl may used for any target that requires acceleration to run properly.
if [[ "$with_opengl" = "yes" ]]; then
    AC_DEFINE(HAVE_OPENGL, 1, [Support for OpenGL graphics acceleration.])
    A8_OPTION(opengl-by-default,no,
              [Set VIDEO_ACCEL=1 in the config file created on first run after installation to enable OpenGL hardware acceleration (OpenGL-aware targets) (default set VIDEO_ACCEL=0)],
              VIDEO_ACCEL_ON_BY_DEFAULT,[Define for targets that require acceleration to run properly, supported only with --with-opengl.]
             )
fi
AM_CONDITIONAL([WITH_OPENGL], test "$with_opengl" = "yes")


dnl Select host/target specific features...

if [[ "$a8_host" = "falcon" ]]; then
    A8_OPTION(falconcpuasm,no,
              [Use m68k assembler CPU core for Falcon target (default=OFF)],
              FALCON_CPUASM,[Define to use m68k assembler CPU core for Falcon target.]
             )
fi
AM_CONDITIONAL([WANT_FALCON_CPUASM], test "$WANT_FALCON_CPUASM" = "yes")

if [[ "$a8_host" = "linux" ]]; then
    case "$a8_target" in
        x11*)
            A8_OPTION(linuxjoystick,yes,
                      [Use LINUX joystick (linux x11 targets only) (default=ON)],
                      LINUX_JOYSTICK,[Define to use LINUX joystick.]
                      )
    esac
fi

if [[ "$WANT_XEP80_EMULATION" = "yes" ]]; then
    AC_DEFINE(XEP80_EMULATION,1,[Emulate the XEP80.])
fi
AM_CONDITIONAL([WANT_XEP80_EMULATION], test "$WANT_XEP80_EMULATION" = "yes")

if [[ "$WANT_NTSC_FILTER" = "yes" ]]; then
    AC_DEFINE(NTSC_FILTER,1,[Use NTSC video filter.])
fi
AM_CONDITIONAL([WANT_NTSC_FILTER], test "$WANT_NTSC_FILTER" = "yes")

if [[ "$WANT_PAL_BLENDING" = "yes" ]]; then
    AC_DEFINE(PAL_BLENDING,1,[Use accurate PAL color blending.])
fi
AM_CONDITIONAL([WANT_PAL_BLENDING], test "$WANT_PAL_BLENDING" = "yes")

if [[ "$SUPPORTS_RDEVICE" = "yes" ]]; then
    A8_OPTION(riodevice,yes,
              [Use the R: networking device (Linux/Unix/Win32) (default=ON)],
              R_IO_DEVICE,[Define to use R: device.]
             )
    if [[ "$WANT_R_IO_DEVICE" = "yes" ]]; then
        A8_OPTION(rnetwork,yes,
                 [Use IP network connection with the R: networking device (Linux/Unix/Win32) (default=ON)],
                 R_NETWORK,[Define to use IP network connection with the R: device.]
                )
        if [[ "$a8_host" != "win" -a "$a8_host" != "macos" ]]; then
            A8_OPTION(rserial,yes,
                     [Use the host serial port with the R: networking device (Linux/Unix only) (default=ON)],
                     R_SERIAL,[Define to use the host serial port with the R: device.]
                    )
        else
            if [[ "$a8_host" = "win" ]]; then
                A8_NEED_LIB(ws2_32)
            fi
            WANT_R_SERIAL="no"
        fi
    fi
fi
AM_CONDITIONAL([WANT_R_IO_DEVICE], test "$WANT_R_IO_DEVICE" = "yes")

dnl Wrapup: export and write Makefile...

AC_SUBST(JAVAFLAGS)
AC_SUBST(JAVACFLAGS)
AC_SUBST(CCAS)
AC_SUBST(CCASFLAGS)
CFLAGS_NOANSI=`echo $CFLAGS | sed -e 's/-ansi//' -e 's/-pedantic//'`
AC_SUBST(CFLAGS_NOANSI)

AC_CONFIG_FILES([
Makefile
DOC/Makefile
src/Makefile
tools/Makefile
])
AC_OUTPUT


dnl Print results of configure's work...

echo "-------------------------------------------------------"
echo "                 CONFIGURATION RESULTS:"
echo "-------------------------------------------------------"
echo "Host OS...............................: $a8_host"
echo "Target ...............................: $a8_target"
echo
if [[ "$a8_target" = default ]]; then
    echo "Interface for video...................: $with_video"
    case "$with_video" in
        *curses)
            echo "Using no bitmap graphics emulation?...: $WANT_CURSES_BASIC"
            ;;
    esac
fi
if [[ "$a8_target" != "default" -o "$with_video" != no ]]; then
    echo "Using screenshots?....................: $WANT_SCREENSHOTS"
    if [[ "$WANT_SCREENSHOTS" = "yes" ]]; then
        echo "    Supported screenshot formats......: $supported_image_formats"
    fi
    if [[ "$WANT_CURSES_BASIC" != "yes" ]]; then
        echo "Using cycle exact?....................: $WANT_NEW_CYCLE_EXACT"
        echo "Using the very slow computer support?.: $WANT_VERY_SLOW"
    fi
    echo "Using the crash menu?.................: $WANT_CRASH_MENU"
fi
echo "Using the paged attribute array?......: $WANT_PAGED_ATTRIB"
echo "Using per opcode cycles update?.......: $WANT_CYCLES_PER_OPCODE"
echo "Using the buffered log?...............: $WANT_BUFFERED_LOG"
echo "Using Altirra BIOS ROM?...............: $WANT_EMUOS_ALTIRRA"
echo "Using the monitor assembler?..........: $WANT_MONITOR_ASSEMBLER"
echo "Using code breakpoints and history?...: $WANT_MONITOR_BREAK"
echo "Using user-defined breakpoints?.......: $WANT_MONITOR_BREAKPOINTS"
echo "Using monitor hints?..................: $WANT_MONITOR_HINTS"
echo "Using 6502 opcode profiling?..........: $WANT_MONITOR_PROFILE"
echo "Using TRACE monitor command?..........: $WANT_MONITOR_TRACE"
echo "Using readline support in monitor?....: $with_readline"
echo "Using UTF-8 support in monitor?.......: $WANT_MONITOR_UTF8"
echo "Using ANSI color support in monitor?..: $WANT_MONITOR_ANSI"
echo "Using event recording?................: $WANT_EVENT_RECORDING"
echo "Using MIO emulation?..................: $WANT_PBI_MIO"
echo "Using Black Box emulation?............: $WANT_PBI_BB"
echo "Using IDE emulation?..................: $WANT_IDE"
echo "Using Pokey registers recording?......: $WANT_POKEYREC"
if [[ "$SUPPORTS_NETSIO" = "yes" ]]; then
    echo "Using NetSIO/FujiNet emulation?.......: $WANT_NETSIO"
fi
echo "Interface for sound...................: $with_sound"
if [[ "$with_sound" != no ]]; then
    echo "    Using nonlinear mixing?...........: $WANT_NONLINEAR_MIXING"
    echo "    Using sound interpolation?........: $WANT_INTERPOLATE_SOUND"
    echo "    Using stereo sound?...............: $WANT_STEREO_SOUND"
    echo "    Using console sound?..............: $WANT_CONSOLE_SOUND"
    echo "    Using 1400XL/1450XLD emulation?...: $WANT_PBI_XLD"
    echo "    Using sound clipping?.............: $WANT_CLIP_SOUND"
    echo "    Using audio recording?............: $WANT_AUDIO_RECORDING"
    if [[ "$WANT_AUDIO_RECORDING" = "yes" ]]; then
        echo "        Supported audio codecs........: $supported_audio_codecs"
        if [[ "$with_mp3" != "no" ]]; then
            echo "        Library for mp3 audio.........: $with_mp3"
        fi
    fi
else
    echo "    (Sound sub-options disabled)"
fi
echo "Using video recording?................: $WANT_VIDEO_RECORDING"
if [[ "$WANT_VIDEO_RECORDING" = "yes" ]]; then
    echo "    Supported video codecs............: $supported_video_codecs"
fi
echo "Using download?.......................: $WANT_DOWNLOAD"

if [[ "$a8_host" = "falcon" ]]; then
    echo "Using M68K assembler CPU core?........: $WANT_FALCON_CPUASM"
fi
if [[ "$a8_host" = "linux" ]]; then
    case "$a8_target" in
        x11*)
            echo "Using Linux joystick?.................: $WANT_LINUX_JOYSTICK"
    esac
fi
if [[ "$SUPPORTS_RDEVICE" = "yes" ]]; then
    echo "Using R: device?......................: $WANT_R_IO_DEVICE"
        if [[ "$a8_host" != "win" -a "$a8_host" != "macos" -a "$WANT_R_IO_DEVICE" = "yes" ]]; then
            echo "    Using R: with the host serial port?...: $WANT_R_SERIAL"
            echo "    Using R: with IP network support......: $WANT_R_NETWORK"
        fi
fi
if [[ "$a8_target" = default -a "$with_video" = sdl ]]; then
    echo "Using on-screen keyboard?.............: $WANT_USE_UI_BASIC_ONSCREEN_KEYBOARD"
    echo "Using OpenGL?.........................: $with_opengl"
fi
if [[ "$a8_target" = default -a "$with_video" = sdl2 ]]; then
    echo "Using OpenGL?.........................: $with_opengl"
fi
echo
echo "Main build variables:"
echo "    CC......: \"$CC\""
echo "    ASFLAGS.: \"$CCASFLAGS\""
echo "    CFLAGS..: \"$CFLAGS\""
echo "    CPPFLAGS: \"$CPPFLAGS\""
echo "    LDFLAGS.: \"$LDFLAGS\""
echo "    LIBS....: \"$LIBS\""
echo "-------------------------------------------------------"

if [[ "$WANT_VERY_SLOW" = "yes" ]]; then
	echo
	echo "IMPORTANT: --enable-veryslow provides a bit better performance"
	echo "only when the compiled atari800 is run with the -refresh option."
	if [[ "$WANT_FALCON_CPUASM" != "yes" ]]; then
		if [[ "$WANT_MONITOR_BREAK" = "yes" ]]; then
			echo "It is better to use --disable-monitorbreak."
		fi
		if [[ "$with_sound" != "no" ]]; then
			echo "Try --without-sound, too."
		fi
		if [[ "$WANT_PAGED_ATTRIB" != "yes" ]]; then
			echo "Have you tried --enable-pagedattrib ?"
		fi
		if [[ "$WANT_CYCLES_PER_OPCODE" != "yes" ]]; then
			echo "Have you tried --enable-cyclesperopcode ?"
		fi
	fi
fi

echo
echo "Now run \"gmake\" or \"make\"."
echo