# Use add_opt to set HAVE_FOO variables the first time
# example: add_opt FOO no
#
# Only needed when check_enabled ($2), check_platform, check_lib, check_pkgconf,
# check_header, check_macro and check_switch are not used.

check_switch '' C99 -std=gnu99 ''

if [ "$HAVE_C99" = 'no' ]; then
   HAVE_C99='auto'
   check_switch '' C99 -std=c99 'Cannot find a C99 compatible compiler.'
fi

check_switch cxx CXX11 -std=c++11 ''
check_switch cxx CXX17 -std=c++17 ''
check_switch '' NOUNUSED -Wno-unused-result ''
check_switch '' NOUNUSED_VARIABLE -Wno-unused-variable ''

# There are still broken 64-bit Linux distros out there. :)
[ -z "$CROSS_COMPILE" ] && [ -d /usr/lib64 ] && add_dirs LIBRARY /usr/lib64

[ -z "$CROSS_COMPILE" ] && [ -d /opt/local/lib ] && add_dirs LIBRARY /opt/local/lib

[ "${GLOBAL_CONFIG_DIR:-}" ] ||
{	case "$PREFIX" in
		/usr*) GLOBAL_CONFIG_DIR=/etc ;;
		*) GLOBAL_CONFIG_DIR="$PREFIX"/etc ;;
	esac
}

DYLIB=-ldl
CLIB=-lc
PTHREADLIB=-lpthread
SOCKETLIB=-lc
SOCKETHEADER=
INCLUDES='usr/include usr/local/include'
SORT='sort'
EXTRA_GL_LIBS=''
VC_PREFIX=''

if [ "$OS" = 'BSD' ]; then
   [ -d /usr/local/include ] && add_dirs INCLUDE /usr/local/include
   [ -d /usr/local/lib ] && add_dirs LIBRARY /usr/local/lib
   DYLIB=-lc;
elif [ "$OS" = 'Haiku' ]; then
   DYLIB=""
   CLIB=-lroot
   PTHREADLIB=-lroot
   SOCKETLIB=-lnetwork
   CFLAGS="$CFLAGS -D_BSD_SOURCE"
elif [ "$OS" = 'Win32' ]; then
   SOCKETLIB=-lws2_32
   SOCKETHEADER="#include <winsock2.h>"
   DYLIB=
elif [ "$OS" = 'Cygwin' ]; then
   die 1 'Error: Cygwin is not a supported platform. See https://bot.libretro.com/docs/compilation/windows/'
elif [ "$OS" = 'SunOS' ]; then
   SORT='gsort'
fi

add_define MAKEFILE DATA_DIR "$SHARE_DIR"
add_define MAKEFILE DYLIB_LIB "$DYLIB"

check_lib '' SYSTEMD -lsystemd sd_get_machine_names

if [ "$HAVE_VIDEOCORE" != "no" ]; then
   check_pkgconf VC_TEST bcm_host

   # use fallback if pkgconfig is not available
   if [ -z "$VC_TEST_LIBS" ]; then
      [ -d /opt/vc/lib ] && add_dirs LIBRARY /opt/vc/lib /opt/vc/lib/GL
      check_lib '' VIDEOCORE -lbcm_host bcm_host_init "-lvcos -lvchiq_arm"
   else
      add_opt VIDEOCORE "$HAVE_VC_TEST"
   fi
fi

if [ "$HAVE_VIDEOCORE" = 'yes' ]; then
   HAVE_OPENGLES='auto'
   VC_PREFIX='brcm'
   INCLUDES="${INCLUDES} opt/vc/include"

   # use fallback if pkgconfig is not available
   if [ -z "$VC_TEST_LIBS" ]; then
      [ -d /opt/vc/include ] && add_dirs INCLUDE /opt/vc/include
      [ -d /opt/vc/include/interface/vcos/pthreads ] && add_dirs INCLUDE /opt/vc/include/interface/vcos/pthreads
      [ -d /opt/vc/include/interface/vmcs_host/linux ] && add_dirs INCLUDE /opt/vc/include/interface/vmcs_host/linux
      EXTRA_GL_LIBS="-lbrcmEGL -lbrcmGLESv2 -lbcm_host -lvcos -lvchiq_arm"
   fi
fi

if [ "$HAVE_7ZIP" = "yes" ]; then
   add_dirs INCLUDE ./deps/7zip
fi

if [ "$HAVE_PRESERVE_DYLIB" = "yes" ]; then
   die : 'Notice: Disabling dlclose() of shared objects for Valgrind support.'
fi

if [ "$HAVE_NEON" = "yes" ]; then
   add_define MAKEFILE NEON_CFLAGS '-mfpu=neon -marm'
   add_define MAKEFILE NEON_ASFLAGS -mfpu=neon
   CFLAGS="${CFLAGS} -mfpu=neon -marm"
fi

if [ "$HAVE_FLOATHARD" = "yes" ]; then
   add_define MAKEFILE FLOATHARD_CFLAGS -mfloat-abi=hard
fi

if [ "$HAVE_FLOATSOFTFP" = "yes" ]; then
   add_define MAKEFILE FLOATSOFTFP_CFLAGS -mfloat-abi=softfp
fi


if [ "$HAVE_ANGLE" = 'yes' ]; then
   eval "HAVE_EGL=\"yes\""
   add_dirs INCLUDE ./gfx/include/ANGLE
   add_opt OPENGL no
   add_opt OPENGLES yes
   add_define MAKEFILE OPENGLES_LIBS "-lGLESv2"

   case "$PLATFORM_NAME" in
      MINGW32* )
         add_dirs LIBRARY ./pkg/windows/x86
      ;;
      MINGW64* )
         add_dirs LIBRARY ./pkg/windows/x86_64
      ;;
   esac
else
   check_header '' EGL EGL/egl.h EGL/eglext.h
   # some systems have EGL libs, but no pkgconfig
   # https://github.com/linux-sunxi/sunxi-mali/pull/8
   check_val '' EGL "-l${VC_PREFIX}EGL $EXTRA_GL_LIBS" '' "${VC_PREFIX}egl" '' '' true
fi

if [ "$HAVE_EGL" = 'yes' ]; then
   EGL_LIBS="$EGL_LIBS $EXTRA_GL_LIBS"
fi

check_header '' XDELTA lzma.h
check_lib '' SSA '-lfribidi -lass' ass_library_init
check_lib '' SSE '-msse -msse2'
check_pkgconf EXYNOS libdrm_exynos

if [ "$LIBRETRO" ]; then
   die : 'Notice: Explicit libretro used, disabling dynamic libretro loading ...'
   add_opt DYNAMIC no
else
   LIBRETRO="-lretro"
fi

[ "$HAVE_DYNAMIC" = 'yes' ] || {
   check_lib '' RETRO "$LIBRETRO" retro_init "$DYLIB" '' '' 'Cannot find libretro, did you forget --with-libretro="-lretro"?'
   add_define MAKEFILE libretro "$LIBRETRO"
}

add_define MAKEFILE ASSETS_DIR "${ASSETS_DIR:-$SHARE_DIR}/retroarch"
add_define MAKEFILE FILTERS_DIR "${FILTERS_DIR:-$SHARE_DIR}/retroarch"
add_define MAKEFILE CORE_INFO_DIR "${CORE_INFO_DIR:-$SHARE_DIR}/retroarch"
add_define MAKEFILE BIN_DIR "${BIN_DIR:-${PREFIX}/bin}"
add_define MAKEFILE DOC_DIR "${DOC_DIR:-${SHARE_DIR}/doc/retroarch}"
add_define MAKEFILE MAN_DIR "${MAN_DIR:-${SHARE_DIR}/man}"

check_platform DOS SHADERPIPELINE 'Shader-based pipelines are' false
check_platform DOS LANGEXTRA 'Extra languages are' false

check_lib '' THREADS "$PTHREADLIB" pthread_create
check_enabled THREADS THREAD_STORAGE 'Thread Local Storage' 'Threads are' false
check_lib '' THREAD_STORAGE "$PTHREADLIB" pthread_key_create

check_pkgconf LIBCHECK check 0.15

if [ "$OS" = 'Linux' ]; then
   check_header '' CDROM sys/ioctl.h scsi/sg.h
fi

check_platform 'Linux Win32' CDROM 'CD-ROM is' user

if [ "$OS" = 'Win32' ]; then
   add_opt DYLIB yes
else
   check_lib '' DYLIB "$DYLIB" dlopen
fi

check_lib '' NETWORKING "$SOCKETLIB" socket "" "$SOCKETHEADER"

if [ "$HAVE_NETWORKING" != 'no' ]; then
   add_opt GETADDRINFO auto
   add_opt SOCKET_LEGACY no

   # WinXP+ implements getaddrinfo()
   if [ "$OS" = 'Win32' ]; then
      HAVE_GETADDRINFO=yes
   else
      check_lib '' GETADDRINFO "$SOCKETLIB" getaddrinfo
      if [ "$HAVE_GETADDRINFO" != 'yes' ]; then
         HAVE_SOCKET_LEGACY=yes
         die : 'Notice: RetroArch will use legacy socket support'
      fi
   fi

   add_opt NETWORK_CMD yes
else
   add_opt NETWORK_CMD no
fi

check_enabled NETWORKING CHEEVOS cheevos 'Networking is' false
check_enabled NETWORKING DISCORD discord 'Networking is' false
check_enabled NETWORKING SSL ssl 'Networking is' false
check_enabled NETWORKING TRANSLATE OCR 'Networking is' false
check_enabled NETWORKING HAVE_NETPLAYDISCOVERY 'Netplay discovery' 'Networking is' false

check_enabled NETWORKING NETWORKGAMEPAD 'the networked game pad' 'Networking is' true

check_lib '' STDIN_CMD "$CLIB" fcntl

if [ "$HAVE_NETWORK_CMD" = "yes" ] || [ "$HAVE_STDIN_CMD" = "yes" ]; then
   add_opt COMMAND yes
else
   add_opt COMMAND no
fi

check_lib '' GETOPT_LONG "$CLIB" getopt_long

if [ "$HAVE_DYLIB" = 'no' ] && [ "$HAVE_DYNAMIC" = 'yes' ]; then
   die 1 'Error: Dynamic loading of libretro is enabled, but your platform does not appear to have dlopen(), use --disable-dynamic or --with-libretro="-lretro".'
fi

check_val '' ALSA -lasound alsa alsa '' '' false
check_val '' CACA -lcaca '' caca '' '' false
check_val '' SIXEL -lsixel '' libsixel 1.6.0 '' false

check_macro AUDIOIO AUDIO_SETINFO sys/audioio.h

if [ "$HAVE_OSS" != 'no' ]; then
   check_header '' OSS sys/soundcard.h
   check_header '' OSS_BSD soundcard.h
   check_lib '' OSS_LIB -lossaudio
fi

check_platform Linux TINYALSA 'Tinyalsa is' true
check_platform Linux RPILED 'The RPI led driver is' true

check_platform Darwin METAL 'Metal is' true

if [ "$OS" = 'Darwin' ]; then
   check_lib '' COREAUDIO "-framework AudioUnit" AudioUnitInitialize
   check_lib '' CORETEXT "-framework CoreText" CTFontCreateWithName
   add_opt CRTSWITCHRES no

   if [ "$HAVE_METAL" = yes ]; then
      check_lib '' COCOA_METAL "-framework AppKit" NSApplicationMain
   else
      check_lib '' COCOA "-framework AppKit" NSApplicationMain
   fi

   check_lib '' AVFOUNDATION "-framework AVFoundation"
   check_lib '' CORELOCATION "-framework CoreLocation"
   check_lib '' IOHIDMANAGER "-framework IOKit" IOHIDManagerCreate
   check_lib '' AL "-framework OpenAL" alcOpenDevice
   HAVE_X11=no # X11 breaks on recent OSXes even if present.
   HAVE_SDL=no
   HAVE_SW2=no
else
   check_lib '' AL -lopenal alcOpenDevice
fi

check_pkgconf RSOUND rsound 1.1
check_pkgconf ROAR libroar 1.0.12
check_val '' JACK -ljack '' jack 0.120.1 '' false
check_val '' PULSE -lpulse '' libpulse '' '' false
check_val '' PIPEWIRE -lpipewire-0.3 '' libpipewire-0.3 '' '' false
check_val '' SDL -lSDL SDL sdl 1.2.10 '' false
check_val '' SDL2 -lSDL2 SDL2 sdl2 2.0.0 '' false

if [ "$HAVE_SDL2" = 'yes' ] && [ "$HAVE_SDL" = 'yes' ]; then
   die : 'Notice: SDL drivers will be replaced by SDL2 ones.'
   HAVE_SDL=no
fi

check_enabled CXX11 CXX C++ 'C++11 support is' false
check_enabled CXX17 CXX C++ 'C++17 support is' false

check_platform Haiku DISCORD 'Discord is' false
check_enabled CXX DISCORD discord 'The C++ compiler is' false
check_enabled CXX QT 'Qt companion' 'The C++ compiler is' false

if [ "$HAVE_QT" != 'no' ]; then
   _have_qt=$HAVE_QT
   if [ "$HAVE_CXX17" = 'yes' ]; then
      check_pkgconf QT6CORE Qt6Core 6.2
      check_pkgconf QT6GUI Qt6Gui 6.2
      check_pkgconf QT6WIDGETS Qt6Widgets 6.2
      check_pkgconf QT6CONCURRENT Qt6Concurrent 6.2
      check_pkgconf QT6NETWORK Qt6Network 6.2
      #check_pkgconf QT6WEBENGINE Qt6WebEngine 6.2

      # pkg-config is needed to reliably find Qt6 libraries.

      check_enabled QT6CORE QT Qt 'Qt6Core is' user
      check_enabled QT6GUI QT Qt 'Qt6GUI is' user
      check_enabled QT6WIDGETS QT Qt 'Qt6Widgets is' user
      check_enabled QT6CONCURRENT QT Qt 'Qt6Concurrent is' user
      check_enabled QT6NETWORK QT Qt 'Qt6Network is' user
      #check_enabled QT6WEBENGINE QT Qt 'Qt6Webengine is' user

      if [ "$HAVE_QT6CORE" == 'yes' ] && \
         [ "$HAVE_QT6GUI" == 'yes' ] &&  \
         [ "$HAVE_QT6WIDGETS" == 'yes' ] &&  \
         [ "$HAVE_QT6CONCURRENT" == 'yes' ] && \
         [ "$HAVE_QT6NETWORK" == 'yes' ]
      then
         HAVE_QT6='yes'
         add_define MAKEFILE HAVE_QT6 1
      fi
   fi
   if [ "$HAVE_QT6" != 'yes' ]; then
      HAVE_QT=$_have_qt
      check_pkgconf QT5CORE Qt5Core 5.2
      check_pkgconf QT5GUI Qt5Gui 5.2
      check_pkgconf QT5WIDGETS Qt5Widgets 5.2
      check_pkgconf QT5CONCURRENT Qt5Concurrent 5.2
      check_pkgconf QT5NETWORK Qt5Network 5.2
      #check_pkgconf QT5WEBENGINE Qt6WebEngine 5.2

      # pkg-config is needed to reliably find Qt5 libraries.

      check_enabled QT5CORE QT Qt 'Qt5Core is' true
      check_enabled QT5GUI QT Qt 'Qt5GUI is' true
      check_enabled QT5WIDGETS QT Qt 'Qt5Widgets is' true
      check_enabled QT5CONCURRENT QT Qt 'Qt5Concurrent is' true
      check_enabled QT5NETWORK QT Qt 'Qt5Network is' true
      #check_enabled QT5WEBENGINE QT Qt 'Qt5Webengine is' true
   fi

   if [ "$HAVE_QT" != yes ]; then
      die : 'Notice: Qt support disabled, required libraries were not found.'
   fi

   check_pkgconf OPENSSL openssl 1.0.0
fi

check_enabled FLAC BUILTINFLAC 'builtin flac' 'flac is' true

check_val '' FLAC '-lFLAC' '' flac '' '' false


check_enabled SSL SYSTEMMBEDTLS 'system mbedtls' 'ssl is' false
check_enabled SSL BUILTINMBEDTLS 'builtin mbedtls' 'ssl is' false
check_enabled SSL BUILTINBEARSSL 'builtin bearssl' 'ssl is' false

if [ "$HAVE_SYSTEMMBEDTLS" = "auto" ]; then SYSTEMMBEDTLS_IS_AUTO=yes; else SYSTEMMBEDTLS_IS_AUTO=no; fi
check_val '' SYSTEMMBEDTLS '-lmbedtls' 'mbedtls' mbedtls 2.5.1 '' true
check_val '' SYSTEMMBEDX509 '-lmbedx509' 'mbedtls' mbedx509 2.5.1 '' true
check_val '' SYSTEMMBEDCRYPTO '-lmbedcrypto' 'mbedtls' mbedcrypto 2.5.1 '' true
if [ "$HAVE_SYSTEMMBEDTLS" = 'yes' ] && [ -z "$SYSTEMMBEDTLS_VERSION" ]; then
  # Ancient versions (such as the one included in the Ubuntu version used for
  # build checks) don't have this header
  check_header '' SYSTEMMBEDTLS mbedtls/net_sockets.h
fi
if [ "$HAVE_SYSTEMMBEDX509" = 'no' ] || [ "$HAVE_SYSTEMMBEDCRYPTO" = 'no' ]; then HAVE_SYSTEMMBEDTLS=no; fi
if [ "$SYSTEMMBEDTLS_IS_AUTO" = "yes" ] && [ "$HAVE_SYSTEMMBEDTLS" = "yes" ]; then HAVE_SYSTEMMBEDTLS=auto; fi

SSL_BACKEND_CHOSEN=no
if [ "$HAVE_SYSTEMMBEDTLS" = "yes" ]; then
  if [ "$SSL_BACKEND_CHOSEN" = "yes" ]; then die 1 "Can't enable multiple SSL backends"; fi
  SSL_BACKEND_CHOSEN=yes
fi
if [ "$HAVE_BUILTINMBEDTLS" = "yes" ]; then
  if [ "$SSL_BACKEND_CHOSEN" = "yes" ]; then die 1 "Can't enable multiple SSL backends"; fi
  SSL_BACKEND_CHOSEN=yes
fi
if [ "$HAVE_BUILTINBEARSSL" = "yes" ]; then
  if [ "$SSL_BACKEND_CHOSEN" = "yes" ]; then die 1 "Can't enable multiple SSL backends"; fi
  SSL_BACKEND_CHOSEN=yes
fi
if [ "$SSL_BACKEND_CHOSEN" = "no" ] && [ "$HAVE_SYSTEMMBEDTLS" = "auto" ]; then
  HAVE_SYSTEMMBEDTLS=yes
  SSL_BACKEND_CHOSEN=yes
fi
if [ "$SSL_BACKEND_CHOSEN" = "no" ] && [ "$HAVE_BUILTINMBEDTLS" = "auto" ]; then
  HAVE_BUILTINMBEDTLS=yes
  SSL_BACKEND_CHOSEN=yes
fi
if [ "$SSL_BACKEND_CHOSEN" = "no" ] && [ "$HAVE_BUILTINBEARSSL" = "auto" ]; then
  HAVE_BUILTINBEARSSL=yes
  SSL_BACKEND_CHOSEN=yes
fi
if [ "$HAVE_SYSTEMMBEDTLS" = "auto" ]; then HAVE_SYSTEMMBEDTLS=no; fi
if [ "$HAVE_BUILTINMBEDTLS" = "auto" ]; then HAVE_BUILTINMBEDTLS=no; fi
if [ "$HAVE_BUILTINBEARSSL" = "auto" ]; then HAVE_BUILTINBEARSSL=no; fi

if [ "$HAVE_SSL" = "auto" ]; then HAVE_SSL=$SSL_BACKEND_CHOSEN; fi
if [ "$HAVE_SSL" = "yes" ] && [ "$SSL_BACKEND_CHOSEN" = "no" ]; then die 1 "error: SSL enabled, but all backends disabled"; fi


check_enabled THREADS LIBUSB libusb 'Threads are' false
check_enabled HID LIBUSB libusb 'HID is' false
check_val '' LIBUSB -lusb-1.0 libusb-1.0 libusb-1.0 1.0.13 '' false

check_lib '' DINPUT -ldinput8
check_lib '' D3D8 -ld3d8
check_lib '' D3D9 -ld3d9
check_lib '' DSOUND -ldsound

check_enabled DINPUT XINPUT xinput 'Dinput is' true

if [ "$HAVE_D3DX" != 'no' ]; then
   check_lib '' D3DX8 -ld3dx8
   check_lib '' D3DX9 -ld3dx9
fi

check_platform Win32 D3D10 'Direct3D 10 is' true
check_platform Win32 D3D11 'Direct3D 11 is' true
check_platform Win32 D3D12 'Direct3D 12 is' true
check_platform Win32 D3DX 'Direct3DX is' true
check_platform Win32 WASAPI 'WASAPI is' true
check_platform Win32 XAUDIO 'XAudio is' true
check_platform Win32 WINMM 'WinMM is' true

if [ "$HAVE_BLISSBOX" != 'no' ]; then
   if [ "$HAVE_LIBUSB" != 'no' ] || [ "$OS" = 'Win32' ]; then
      add_opt BLISSBOX yes
   else
      add_opt BLISSBOX no
   fi
fi

if [ "$HAVE_OPENGL" != 'no' ] && [ "$HAVE_OPENGLES" != 'yes' ]; then
   if [ "$OS" = 'Darwin' ]; then
      check_header '' OPENGL "OpenGL/gl.h"
      check_lib '' OPENGL "-framework OpenGL"
   elif [ "$OS" = 'Win32' ]; then
      check_header '' OPENGL "GL/gl.h"
      check_lib '' OPENGL -lopengl32
   elif [ "$HAVE_GLX" = 'no' ]; then
      # Use vendor-neutral OpenGL implementation instead of GLX
      check_header '' OPENGL "GL/gl.h"
      check_lib '' OPENGL -lOpenGL
   else
      check_header '' OPENGL "GL/gl.h"
      check_lib '' OPENGL -lGL
   fi

   if [ "$HAVE_OPENGL" = 'yes' ]; then
      if [ "$OS" = 'Darwin' ]; then
         check_lib '' CG '-framework Cg' cgCreateContext
      elif [ "$OS" = 'Win32' ]; then
         check_lib cxx CG '-lcg -lcgGL' cgCreateContext
      else
         # On some distros, -lCg doesn't link against -lstdc++ it seems ...
         check_lib cxx CG '-lCg -lCgGL' cgCreateContext
      fi

      check_pkgconf OSMESA osmesa
   fi
else
   add_opt OPENGL no
fi

check_enabled EGL OPENGLES OpenGLES 'EGL is' false
check_enabled EGL OPENGLES3 OpenGLES3 'EGL is' false
check_enabled EGL VG OpenVG 'EGL is' false
check_enabled OPENGL CG Cg 'OpenGL is' false
check_enabled OPENGL OSMESA osmesa 'OpenGL is' false
check_enabled OPENGL OPENGL1 OpenGL1 'OpenGL is' false

if [ "$HAVE_OPENGL" = 'no' ] && [ "$HAVE_OPENGLES3" = 'no' ]; then
   die : 'Notice: OpenGL and OpenGLES3 are disabled. Disabling OpenGL core.'
   HAVE_OPENGL_CORE='no'
elif [ "$HAVE_OPENGLES" != 'no' ] && [ "$HAVE_OPENGLES3" != 'yes' ]; then
   die : 'Notice: OpenGLES2 is enabled. Disabling the OpenGL core driver.'
   HAVE_OPENGL_CORE='no'
fi

check_enabled 'OPENGL OPENGLES OPENGLES3' GLSL GLSL \
   'OpenGL and OpenGLES are' false

check_enabled ZLIB BUILTINZLIB 'builtin zlib' 'zlib is' true

check_val '' ZLIB '-lz' '' zlib '' '' false
check_val '' MPV -lmpv '' mpv '' '' false

check_header '' DRMINGW exchndl.h
check_lib '' DRMINGW -lexchndl

check_enabled THREADS FFMPEG FFmpeg 'Threads are' false

if [ "$HAVE_FFMPEG" != 'no' ]; then
   check_val '' AVCODEC -lavcodec '' libavcodec 57 '' false
   check_val '' AVFORMAT -lavformat '' libavformat 57 '' false
   check_val '' AVDEVICE -lavdevice '' libavdevice 57 '' false
   check_val '' SWRESAMPLE -lswresample '' libswresample 2 '' false
   check_val '' AVUTIL -lavutil '' libavutil 55 '' false
   check_val '' SWSCALE -lswscale '' libswscale 4 '' false

   check_header '' AV_CHANNEL_LAYOUT libavutil/channel_layout.h

   HAVE_FFMPEG='yes'
   if [ "$HAVE_AVCODEC" = 'no' ] || [ "$HAVE_SWRESAMPLE" = 'no' ] || [ "$HAVE_AVFORMAT" = 'no' ] || [ "$HAVE_AVUTIL" = 'no' ] || [ "$HAVE_SWSCALE" = 'no' ]; then
      HAVE_FFMPEG='no'
      die : 'Notice: FFmpeg built-in support disabled due to missing or unsuitable packages.'
   fi
else
   HAVE_FFMPEG='no'
fi

if [ "$OS" != 'Win32' ]; then
   check_lib '' DYNAMIC "$DYLIB" dlopen
fi

if [ "$HAVE_KMS" != "no" ]; then
   check_val '' GBM -lgbm '' gbm 9.0 '' false
   check_val '' DRM -ldrm libdrm libdrm '' '' false
fi

check_enabled DRM KMS KMS 'DRM is' true
check_enabled GBM KMS KMS 'GBM is' true
check_enabled EGL KMS KMS 'EGL is' true

if [ "$HAVE_EGL" = "yes" ]; then
   if [ "$HAVE_OPENGLES" != "no" ]; then
      if [ "$OPENGLES_LIBS" ] || [ "$OPENGLES_CFLAGS" ]; then
         die : "Notice: Using custom OpenGLES CFLAGS ($OPENGLES_CFLAGS) and LDFLAGS ($OPENGLES_LIBS)."
         add_define MAKEFILE OPENGLES_LIBS "$OPENGLES_LIBS"
         add_define MAKEFILE OPENGLES_CFLAGS "$OPENGLES_CFLAGS"
      else
         check_val '' OPENGLES "-l${VC_PREFIX}GLESv2 $EXTRA_GL_LIBS" '' "${VC_PREFIX}glesv2" '' '' true
      fi
   fi
   check_val '' VG "-l${VC_PREFIX}OpenVG $EXTRA_GL_LIBS" '' "${VC_PREFIX}vg" '' '' false
fi

check_pkgconf DBUS dbus-1
check_val '' UDEV "-ludev" '' libudev '' '' false
check_val '' V4L2 -lv4l2 '' libv4l2 '' '' false
check_val '' FREETYPE -lfreetype freetype2 freetype2 '' '' false
check_val '' FONTCONFIG -lfontconfig fontconfig fontconfig '' '' false
check_val '' X11 -lX11 '' x11 '' '' false

if [ "$HAVE_X11" != 'no' ]; then
   check_val '' XCB -lxcb '' xcb '' '' false
   check_val '' XEXT -lXext '' xext '' '' false
   check_val '' XF86VM -lXxf86vm '' xxf86vm '' '' false
   check_val '' XSCRNSAVER -lXss '' xscrnsaver '' '' false
else
   die : 'Notice: X11 not present. Skipping X11 code paths.'
fi

check_enabled X11 XINERAMA Xinerama 'Xinerama is' false
check_enabled X11 XSHM XShm 'XShm is' false
check_enabled X11 XRANDR Xrandr 'Xrandr is' false
check_enabled X11 XVIDEO XVideo 'Xvideo is' false
check_enabled XEXT XVIDEO XVideo 'Xext is' false
check_enabled XF86VM XVIDEO XVideo 'XF86vm is' false

check_val '' XVIDEO -lXv '' xv '' '' false
check_val '' XINERAMA -lXinerama '' xinerama '' '' false
check_lib '' XRANDR -lXrandr
check_header '' XSHM X11/Xlib.h X11/extensions/XShm.h
check_val '' XKBCOMMON -lxkbcommon '' xkbcommon 0.3.2 '' false
check_val '' WAYLAND '-lwayland-egl -lwayland-client' '' wayland-egl 10.1.0 '' false
check_val '' WAYLAND_CURSOR -lwayland-cursor '' wayland-cursor 1.12 '' false
check_pkgconf WAYLAND_PROTOS wayland-protocols 1.32
check_pkgconf WAYLAND_SCANNER wayland-scanner '1.15 1.12'

if [ "$HAVE_WAYLAND_SCANNER" = yes ] &&
   [ "$HAVE_WAYLAND_CURSOR" = yes ] &&
   [ "$HAVE_WAYLAND" = yes ]; then
      ./gfx/common/wayland/generate_wayland_protos.sh \
         -c "$WAYLAND_SCANNER_VERSION" \
         -p "$HAVE_WAYLAND_PROTOS" \
         -s "$SHARE_DIR" ||
         die 1 'Error: Failed generating wayland protocols.'

      check_pkgconf LIBDECOR libdecor-0
else
    die : 'Notice: wayland libraries not found, disabling wayland support.'
    HAVE_WAYLAND='no'
fi

check_header '' PARPORT linux/parport.h
check_header '' PARPORT linux/ppdev.h

if [ "$OS" != 'Win32' ] && [ "$OS" != 'Linux' ]; then
   check_lib '' STRL "$CLIB" strlcpy
fi

check_lib '' STRCASESTR "$CLIB" strcasestr
check_lib '' MMAP "$CLIB" mmap
check_lib '' MEMFD_CREATE "$CLIB" memfd_create

check_enabled CXX VULKAN vulkan 'The C++ compiler is' false
check_enabled CXX OPENGL_CORE 'OpenGL core' 'The C++ compiler is' false
check_enabled THREADS VULKAN vulkan 'Threads are' false

if [ "$HAVE_VULKAN" != "no" ] && [ "$OS" = 'Win32' ]; then
   HAVE_VULKAN=yes
else
   check_lib '' VULKAN -lvulkan vkCreateInstance
fi

if [ "$HAVE_MENU" != 'no' ]; then
   if [ "$HAVE_OPENGL" = 'no' ]      &&
      [ "$HAVE_OPENGL1" = 'no' ]     &&
      [ "$HAVE_OPENGLES" = 'no' ]    &&
      [ "$HAVE_OPENGL_CORE" = 'no' ] &&
      [ "$HAVE_VULKAN" = 'no' ]      &&
      [ "$HAVE_D3D10" = 'no' ]       &&
      [ "$HAVE_D3D11" = 'no' ]       &&
      [ "$HAVE_D3D12" = 'no' ]       &&
      [ "$HAVE_METAL" = 'no' ]; then
      if [ "$OS" = 'Win32' ]; then
         HAVE_SHADERPIPELINE=no
         HAVE_VULKAN=no
      else
         if [ "$HAVE_CACA" != 'yes' ] && [ "$HAVE_SIXEL" != 'yes' ] &&
            [ "$HAVE_SDL" != 'yes' ] && [ "$HAVE_SDL2" != 'yes' ]; then
            add_opt RGUI no
         fi
         add_opt MATERIALUI no
         add_opt OZONE no
         add_opt XMB no
         add_opt STRIPES no
      fi
      die : 'Notice: Hardware rendering context not available.'
   fi
fi

if [ "$HAVE_STEAM" = 'yes' ]; then
   add_opt CORE_INFO_CACHE no
   add_opt ONLINE_UPDATER no
   add_opt UPDATE_CORES no
   die : 'Notice: Steam build enabled, disabling:'
   die : '* Core info cache.'
   die : '* Core updater.'
   die : '* Online updater.'

   # Keep base directory relative to installation on Linux just like it is on Windows
   if [ "$OS" = "Linux" ]; then
      add_define MAKEFILE UNIX_CWD_ENV 1
   fi
fi

if [ "$HAVE_MIST" = 'yes' ]; then
   if [ "$HAVE_STEAM" != 'yes' ]; then
      die 1 'Error: mist builds requires steam to be enabled'
   fi

   if [ ! -d "$MIST_PATH" ]; then
      die 1 'Error: MIST_PATH must be pointing to the location of mist artifacts'
   fi

   add_define MAKEFILE MIST_PATH "$MIST_PATH"
fi

check_enabled CXX SLANG slang 'The C++ compiler is' false
check_enabled CXX GLSLANG glslang 'The C++ compiler is' false
check_enabled CXX SPIRV_CROSS SPIRV-Cross 'The C++ compiler is' false

check_enabled GLSLANG BUILTINGLSLANG 'builtin glslang' 'glslang is' true

if [ "$HAVE_GLSLANG" != no ]; then
   check_header cxx GLSLANG \
      glslang/Public/ShaderLang.h \
      glslang/SPIRV/GlslangToSpv.h

   check_lib cxx GLSLANG -lglslang '' '-lSPIRV'
   check_lib cxx GLSLANG_OSDEPENDENT -lOSDependent
   check_lib cxx GLSLANG_MACHINEINDEPENDENT -lMachineIndependent
   check_lib cxx GLSLANG_GENERICCODEGEN -lGenericCodeGen
   check_lib cxx GLSLANG_SPIRV -lSPIRV
   check_lib cxx GLSLANG_SPIRV_TOOLS_OPT -lSPIRV-Tools-opt
   check_lib cxx GLSLANG_SPIRV_TOOLS -lSPIRV-Tools

   if [ "$HAVE_GLSLANG" = no ] ||
      [ "$HAVE_GLSLANG_SPIRV" = no ] ||
      [ "$HAVE_GLSLANG_SPIRV_TOOLS_OPT" = no ] ||
      [ "$HAVE_GLSLANG_SPIRV_TOOLS" = no ]; then
      if [ "$HAVE_BUILTINGLSLANG" != yes ]; then
         die : 'Notice: System glslang libraries not found, disabling glslang support.'
         HAVE_GLSLANG=no
      else
         HAVE_GLSLANG=yes
      fi
   else
      HAVE_GLSLANG=yes
   fi
fi

if [ "$HAVE_CRTSWITCHRES" != no ]; then
   if [ "$HAVE_CXX11" = 'no' ]; then
      HAVE_CRTSWITCHRES=no
   else
      HAVE_CRTSWITCHRES=yes
   fi
fi

check_enabled SLANG GLSLANG glslang 'slang is' false
check_enabled SLANG SPIRV_CROSS SPIRV-Cross 'slang is' false
check_enabled SLANG OPENGL_CORE 'OpenGL core' 'slang is' false
check_enabled SLANG VULKAN vulkan 'slang is' false
check_enabled SLANG METAL metal 'slang is' false

check_enabled GLSLANG SLANG slang 'glslang is' false
check_enabled GLSLANG SPIRV_CROSS SPIRV-Cross 'glslang is' false
check_enabled GLSLANG OPENGL_CORE 'OpenGL core' 'glslang is' false
check_enabled GLSLANG VULKAN vulkan 'glslang is' false
check_enabled GLSLANG METAL metal 'glslang is' false

check_enabled SPIRV_CROSS SLANG slang 'SPIRV-Cross is' false
check_enabled SPIRV_CROSS GLSLANG glslang 'SPIRV-Cross is' false
check_enabled SPIRV_CROSS OPENGL_CORE 'OpenGL core' 'SPIRV-Cross is' false
check_enabled SPIRV_CROSS VULKAN vulkan 'SPIRV-Cross is' false
check_enabled SPIRV_CROSS METAL metal 'SPIRV-Cross is' false

check_enabled 'OPENGL_CORE METAL VULKAN' SLANG slang '' user
check_enabled 'OPENGL_CORE METAL VULKAN' GLSLANG glslang '' user
check_enabled 'OPENGL_CORE METAL VULKAN' SPIRV_CROSS SPIRV-Cross '' user

check_macro NEON __ARM_NEON__

add_define MAKEFILE OS "$OS"

if [ "$ARCHITECTURE_NAME" = 'Power Macintosh' ]; then
   HAVE_LANGEXTRA='no'
fi

if [ "$HAVE_DEBUG" = 'yes' ]; then
   add_define MAKEFILE DEBUG 1
   if [ "$HAVE_OPENGL" = 'yes' ] ||
      [ "$HAVE_OPENGL1" = 'yes' ] ||
      [ "$HAVE_OPENGLES" = 'yes' ] ||
      [ "$HAVE_OPENGLES3" = 'yes' ]; then
      add_define MAKEFILE GL_DEBUG 1
   fi
   if [ "$HAVE_VULKAN" = 'yes' ]; then
      add_define MAKEFILE VULKAN_DEBUG 1
   fi
fi

check_enabled 'ZLIB BUILTINZLIB' RPNG RPNG 'zlib is' false
check_enabled V4L2 VIDEOPROCESSOR 'video processor' 'Video4linux2 is' true

if [ "$HAVE_CXX11" = 'yes' ]; then
   if [ "$OS" = 'Linux' ]; then
      check_enabled 'VIDEOCORE X11' SR2 'CRT modeswitching' 'CRT is' true
   else
      check_platform Win32 SR2 'CRT modeswitching is' true
   fi
fi