1.18.0: meson fails in examples if opencv is not found: ERROR: Unknown variable "opencv_dep".

+ /usr/bin/meson --buildtype=plain --prefix=/usr --libdir=/usr/lib64 --libexecdir=/usr/libexec --bindir=/usr/bin --sbindir=/usr/sbin --includedir=/usr/include --datadir=/usr/share --mandir=/usr/share/man --infodir=/usr/share/info --localedir=/usr/share/locale --sysconfdir=/etc --localstatedir=/var --sharedstatedir=/var/lib --wrap-mode=nodownload --auto-features=enabled . x86_64-redhat-linux-gnu -D accurip=enabled -D adpcmdec=enabled -D aiff=enabled -D androidmedia=enabled -D aom=enabled -D applemedia=enabled -D asfmux=enabled -D assrender=enabled -D audiobuffersplit=enabled -D audiofxbad=enabled -D audiolatency=enabled -D audiomixmatrix=enabled -D audiovisualizers=enabled -D autoconvert=enabled -D avtp=disabled -D bayer=enabled -D bluez=enabled -D bs2b=enabled -D bz2=enabled -D camerabin2=enabled -D chromaprint=enabled -D closedcaption=enabled -D coloreffects=enabled -D curl=enabled -D curl=enabled -D d3dvideosink=enabled -D dash=enabled -D dc1394=enabled -D debugutils=enabled -D decklink=enabled -D directfb=disabled -D directsound=enabled -D doc=disabled -D dtls=enabled -D dts=enabled -D dvb=enabled -D dvbsuboverlay=enabled -D dvdspu=enabled -D examples=enabled -D faac=enabled -D faad=enabled -D faceoverlay=enabled -D fbdev=enabled -D fdkaac=enabled -D festival=enabled -D fieldanalysis=enabled -D flite=disabled -D fluidsynth=enabled -D freeverb=enabled -D frei0r=enabled -D gaudieffects=enabled -D gdp=enabled -D geometrictransform=enabled -D gl=enabled -D glib-asserts=disabled -D glib-checks=disabled -D gme=disabled -D gobject=disabled -D gsm=enabled -D gst_player_tests=false -D hls-crypto=openssl -D hls=enabled -D id3tag=enabled -D inter=enabled -D interlace=enabled -D introspection=enabled -D ipcpipeline=enabled -D iqa=disabled -D ivfparse=enabled -D ivtc=enabled -D jp2kdecimator=enabled -D jpegformat=enabled -D kate=disabled -D kms=enabled -D ladspa=enabled -D libde265=disabled -D libmms=disabled -D librfb=enabled -D lv2=disabled -D magicleap=disabled -D microdns=enabled -D midi=enabled -D modplug=disabled -D mpeg2enc=disabled -D mpegdemux=disabled -D mpegpsmux=disabled -D mpegtsdemux=disabled -D mpegtsmux=disabled -D mplex=disabled -D msdk=enabled -D musepack=disabled -D mxf=enabled -D neon=disabled -D netsim=enabled -D nls=enabled -D nvdec=disabled -D nvenc=disabled -D ofa=disabled -D onvif=enabled -D openal=enabled -D opencv4=enabled -D opencv=disabled -D openexr=enabled -D openh264=disabled -D openjpeg=enabled -D openmpt=disabled -D openni2=disabled -D opensles=disabled -D opus=enabled -D orc=enabled -D package-origin=G2V -D pcapparse=enabled -D pnm=enabled -D proxy=enabled -D rawparse=enabled -D removesilence=enabled -D resindvd=enabled -D rsvg=enabled -D rtmp=disabled -D sbc=enabled -D sctp=disabled -D sdp=enabled -D segmentclip=enabled -D shm=enabled -D siren=enabled -D smooth=enabled -D smoothstreaming=enabled -D sndfile=enabled -D soundtouch=enabled -D spandsp=disabled -D speed=enabled -D srt=enabled -D srtp=enabled -D subenc=enabled -D svthevcenc=disabled -D teletext=enabled -D tests=enabled -D timecode=enabled -D tinyalsa=disabled -D ttml=enabled -D uvch264=enabled -D vdpau=disabled -D videofilters=enabled -D videoframe_audiolevel=enabled -D videoparsers=enabled -D videosignal=enabled -D vmnc=enabled -D voaacenc=disabled -D voamrwbenc=disabled -D vulkan=disabled -D wasapi2=disabled -D wasapi=disabled -D wayland=enabled -D webp=enabled -D webrtcdsp=enabled -D webrtc=enabled -D wildmidi=enabled -D winks=enabled -D winscreencap=enabled -D wpe=enabled -D x11=enabled -D x265=disabled -D y4m=enabled -D yadif=enabled -D zbar=enabled -D zxing=disabled
The Meson build system
Version: 0.55.1
Source dir: /home/tkloczko/rpmbuild/BUILD/gst-plugins-bad-1.18.0
Build dir: /home/tkloczko/rpmbuild/BUILD/gst-plugins-bad-1.18.0/x86_64-redhat-linux-gnu
Build type: native build
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
WARNING: Unknown options: "gobject, nvdec, nvenc, opencv4, vdpau, yadif"
The value of new options can be set with:
meson setup <builddir> --reconfigure -Dnew_option=new_value ...
Project name: gst-plugins-bad
Project version: 1.18.0
Using 'CC' from environment with value: 'gcc'
Using 'CFLAGS' from environment with value: '-O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fstack-protector-strong -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -flto=auto -flto-partition=none'
Using 'LDFLAGS' from environment with value: '-Wl,-z,relro -Wl,--as-needed  -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -flto=auto -flto-partition=none -fuse-linker-plugin'
Using 'AR' from environment with value: '/usr/bin/gcc-ar'
Using 'CXX' from environment with value: 'g++'
Using 'CXXFLAGS' from environment with value: '-O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fstack-protector-strong -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -flto=auto -flto-partition=none'
Using 'LDFLAGS' from environment with value: '-Wl,-z,relro -Wl,--as-needed  -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -flto=auto -flto-partition=none -fuse-linker-plugin'
Using 'CC' from environment with value: 'gcc'
Using 'CFLAGS' from environment with value: '-O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fstack-protector-strong -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -flto=auto -flto-partition=none'
Using 'LDFLAGS' from environment with value: '-Wl,-z,relro -Wl,--as-needed  -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -flto=auto -flto-partition=none -fuse-linker-plugin'
C compiler for the host machine: gcc (gcc 10.2.1 "gcc (GCC) 10.2.1 20200826 (Red Hat 10.2.1-3)")
C linker for the host machine: gcc ld.bfd 2.35-12
Using 'AR' from environment with value: '/usr/bin/gcc-ar'
Using 'CXX' from environment with value: 'g++'
Using 'CXXFLAGS' from environment with value: '-O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fstack-protector-strong -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -flto=auto -flto-partition=none'
Using 'LDFLAGS' from environment with value: '-Wl,-z,relro -Wl,--as-needed  -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -flto=auto -flto-partition=none -fuse-linker-plugin'
C++ compiler for the host machine: g++ (gcc 10.2.1 "g++ (GCC) 10.2.1 20200826 (Red Hat 10.2.1-3)")
C++ linker for the host machine: g++ ld.bfd 2.35-12
Host machine cpu family: x86_64
Host machine cpu: x86_64
Compiler for C++ supports arguments -Wno-non-virtual-dtor -Wnon-virtual-dtor: YES
Compiler for C supports link arguments -Wl,-Bsymbolic-functions: YES
Compiler for C supports arguments -fvisibility=hidden: YES
Compiler for C supports arguments -fno-strict-aliasing: YES
Compiler for C++ supports arguments -fno-strict-aliasing: YES
Message: Disabling GLib asserts
Message: Disabling GLib checks
Has header "dlfcn.h" : YES
Has header "fcntl.h" : YES
Has header "inttypes.h" : YES
Has header "memory.h" : YES
Has header "netinet/in.h" : YES
Has header "netinet/ip.h" : YES
Has header "netinet/tcp.h" : YES
Has header "pthread.h" : YES
Has header "stdint.h" : YES
Has header "stdlib.h" : YES
Has header "strings.h" : YES
Has header "string.h" : YES
Has header "sys/param.h" : YES
Has header "sys/socket.h" : YES
Has header "sys/stat.h" : YES
Has header "sys/time.h" : YES
Has header "sys/types.h" : YES
Has header "sys/utsname.h" : YES
Has header "unistd.h" : YES
Has header "windows.h" : NO
Has header "winsock2.h" : NO
Has header "ws2tcpip.h" : NO
Checking for function "dcgettext" : YES
Checking for function "getpagesize" : YES
Checking for function "gmtime_r" : YES
Checking for function "mmap" : YES
Checking for function "pipe2" : YES
Checking for function "getrusage" : YES
Checking for size of "char" : 1
Checking for size of "int" : 4
Checking for size of "long" : 8
Checking for size of "short" : 2
Checking for size of "void*" : 8
Compiler for C supports arguments -Wmissing-prototypes: YES
Compiler for C supports arguments -Wdeclaration-after-statement: YES
Compiler for C supports arguments -Wold-style-definition: YES
Compiler for C++ supports arguments -Wformat-nonliteral: YES
Compiler for C supports arguments -Wmissing-declarations: YES
Compiler for C++ supports arguments -Wmissing-declarations: YES
Compiler for C supports arguments -Wredundant-decls: YES
Compiler for C++ supports arguments -Wredundant-decls: YES
Compiler for C supports arguments -Wwrite-strings: YES
Compiler for C++ supports arguments -Wwrite-strings: YES
Compiler for C supports arguments -Wformat: YES
Compiler for C++ supports arguments -Wformat: YES
Compiler for C supports arguments -Wformat-security: YES
Compiler for C++ supports arguments -Wformat-security: YES
Compiler for C supports arguments -Winit-self: YES
Compiler for C++ supports arguments -Winit-self: YES
Compiler for C supports arguments -Wmissing-include-dirs: YES
Compiler for C++ supports arguments -Wmissing-include-dirs: YES
Compiler for C supports arguments -Waddress: YES
Compiler for C++ supports arguments -Waddress: YES
Compiler for C supports arguments -Wno-multichar -Wmultichar: YES
Compiler for C++ supports arguments -Wno-multichar -Wmultichar: YES
Compiler for C supports arguments -Wvla: YES
Compiler for C++ supports arguments -Wvla: YES
Compiler for C supports arguments -Wpointer-arith: YES
Compiler for C++ supports arguments -Wpointer-arith: YES
Found pkg-config: /usr/bin/pkg-config (1.7.3)
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-1.0 found: YES 1.18.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-base-1.0 found: YES 1.18.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-net-1.0 found: YES 1.18.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-controller-1.0 found: YES 1.18.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-pbutils-1.0 found: YES 1.18.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-allocators-1.0 found: YES 1.18.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-app-1.0 found: YES 1.18.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-audio-1.0 found: YES 1.18.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-fft-1.0 found: YES 1.18.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-riff-1.0 found: YES 1.18.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-rtp-1.0 found: YES 1.18.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-rtsp-1.0 found: YES 1.18.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-sdp-1.0 found: YES 1.18.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-tag-1.0 found: YES 1.18.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-video-1.0 found: YES 1.18.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-check-1.0 found: YES 1.18.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-gl-1.0 found: YES 1.18.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-gl-prototypes-1.0 found: YES 1.18.0
Message: GStreamer OpenGL window systems: wayland x11 gbm
Message: GStreamer OpenGL platforms: egl glx
Message: GStreamer OpenGL apis: gles2 gl
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-gl-x11-1.0 found: YES 1.18.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-gl-wayland-1.0 found: YES 1.18.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-gl-egl-1.0 found: YES 1.18.0
Library m found: YES
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency glib-2.0 found: YES 2.65.3
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gmodule-2.0 found: YES 2.65.3
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gio-2.0 found: YES 2.65.3
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency x11 found: YES 1.6.12
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency orc-0.4 found: YES 0.4.31
Program orcc found: YES
Header <gst/gstconfig.h> has symbol "GST_DISABLE_GST_DEBUG" with dependency gstreamer-1.0: YES
Message: GStreamer debug system is disabled
Compiler for C supports arguments -Wno-unused -Wunused: YES
Compiler for C++ supports arguments -Wno-unused -Wunused: YES
Program python3 found: YES (/usr/bin/python3)
Program g-ir-scanner found: YES
Found pkg-config: /usr/bin/pkg-config (1.7.3)
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Build-time dependency gobject-introspection-1.0 found: YES 1.64.1
Program g_ir_scanner found: YES (/usr/bin/g-ir-scanner)
Program g_ir_compiler found: YES (/usr/bin/g-ir-compiler)
Program glib-mkenums found: YES
Program glib-mkenums found: YES
Program glib-mkenums found: YES
Program glib-mkenums found: YES
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency wayland-client found: YES 1.18.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency libdrm found: YES 2.4.102
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency wayland-protocols found: YES 1.20
Program wayland-scanner found: YES
Program glib-mkenums found: YES
Program glib-mkenums found: YES
Compiler for C supports arguments -Wno-unknown-pragmas -Wunknown-pragmas: YES
Found CMake: /usr/bin/cmake (3.18.1)
Using 'FFLAGS' from environment with value: '-O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fstack-protector-strong -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -I/usr/lib64/gfortran/modules -flto=auto -flto-partition=none'
Using 'LDFLAGS' from environment with value: '-Wl,-z,relro -Wl,--as-needed  -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -flto=auto -flto-partition=none -fuse-linker-plugin'
Run-time dependency ltc found: NO (tried pkgconfig and cmake)
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency bluez found: YES 5.55
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gio-unix-2.0 found: YES 2.65.3
Program gdbus-codegen found: YES
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Library dl found: YES
Run-time dependency threads found: YES
Message: Building decklink plugin
Has header "linux/fb.h" : YES
Dependency libdrm found: YES 2.4.102 (cached)
Library ml_audio skipped: feature magicleap disabled
Library lumin_rt_core_1_5 skipped: feature magicleap disabled
Library lumin_rt_app_1_5 skipped: feature magicleap disabled
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency libmfx found: YES 1.32
Has header "mfx/mfxdefs.h" : YES
Has header "mfxvp9.h" : YES
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency libva-drm found: YES 1.8.0
Library dl found: YES
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gudev-1.0 found: YES 233
Library rt found: YES
Has header "sys/socket.h" : YES (cached)
Dependency gudev-1.0 found: YES 233 (cached)
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency libusb-1.0 found: YES 1.0.23
Has header "linux/uvcvideo.h" : YES
Dependency gudev-1.0 found: YES 233 (cached)
Has header "linux/videodev2.h" : YES
Header <sys/mkdev.h> has symbol "makedev" : NO
Header <sys/sysmacros.h> has symbol "makedev" : YES
Header <sys/types.h> has symbol "makedev" : NO
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency libva found: YES 1.8.0
Dependency libva-drm found: YES 1.8.0 (cached)
Dependency gudev-1.0 found: YES 233 (cached)
Dependency libdrm found: YES 2.4.102 (cached)
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency libass found: YES 0.14.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency aom found: YES 2.0.0
Dependency avtp skipped: feature avtp disabled
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency libbs2b found: YES 3.1.0
Library bz2 found: YES
Header <bzlib.h> has symbol "BZ2_bzlibVersion" : YES
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency libchromaprint found: YES 1.5.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency pangocairo found: YES 1.46.1
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency lcms2 found: YES 2.11
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency libcurl found: YES 7.72.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency libssh2 found: YES 1.9.0_DEV
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency libxml-2.0 found: YES 2.9.10
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency libdc1394-2 found: YES 2.2.6
Dependency directfb skipped: feature directfb disabled
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency openssl found: YES 1.1.1g
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency libcrypto found: YES 1.1.1g
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency libdca found: YES 0.0.6
Library faac found: YES
Header <faac.h> has symbol "faacEncOpen" : YES
Header <neaacdec.h> has symbol "NeAACDecOpen" : YES
Header <neaacdec.h> has symbol "LATM" : YES
Library faad found: YES
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency fdk-aac found: YES 2.0.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency fluidsynth found: YES 2.1.4
Library gsm found: YES
Header <gsm.h> has symbol "gsm_create" : YES
Dependency openssl found: YES 1.1.1g (cached)
Dependency dssim skipped: feature iqa disabled
Dependency kate skipped: feature kate disabled
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency lrdf found: YES 0.5.0
Has header "ladspa.h" : YES
Dependency libde265 skipped: feature libde265 disabled
Dependency libmms skipped: feature libmms disabled
Dependency lilv-0 skipped: feature lv2 disabled
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency microdns found: YES 0.2.0
WARNING: Project targeting '>= 0.49' but tried to use feature introduced in '0.54.0': native arg in add_languages.
Compiler for language cpp skipped: feature modplug disabled
Dependency mjpegtools skipped: feature mpeg2enc disabled
Library mpeg2encpp skipped: feature mpeg2enc disabled
Compiler for C++ supports arguments -Wno-mismatched-tags -Wmismatched-tags: YES
Compiler for C++ supports arguments -Wno-header-guard -Wheader-guard: NO
Dependency mjpegtools skipped: feature mplex disabled
Library mplex2 skipped: feature mplex disabled
Library mpcdec skipped: feature musepack disabled
Dependency neon skipped: feature neon disabled
Dependency libofa skipped: feature ofa disabled
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency openal found: YES 1.20.1
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency openexr found: YES 2.5.3
Dependency openh264 skipped: feature openh264 disabled
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency libopenjp2 found: YES 2.3.1
Dependency libopenmpt skipped: feature openmpt disabled
Compiler for language cpp skipped: feature openni2 disabled
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency opus found: YES 1.3.1
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency dvdnav found: YES 6.1.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency dvdread found: YES 6.1.1
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency librsvg-2.0 found: YES 2.49.5
Dependency librtmp skipped: feature rtmp disabled
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency sbc found: YES 1.4
Dependency libxml-2.0 found: YES 2.9.10 (cached)
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency sndfile found: YES 1.0.28
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency soundtouch found: YES 2.1.2
Dependency spandsp skipped: feature spandsp disabled
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency srt found: YES 1.4.1
Program glib-mkenums found: YES
Program glib-mkenums found: YES
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency libsrtp2 found: YES 2.3.0
Program glib-mkenums found: YES
Program glib-mkenums found: YES
Dependency SvtHevcEnc skipped: feature svthevcenc disabled
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency zvbi-0.2 found: YES 0.2.35
Dependency libxml-2.0 found: YES 2.9.10 (cached)
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency pango found: YES 1.46.1
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency cairo found: YES 1.16.0
Dependency pangocairo found: YES 1.46.1 (cached)
Dependency vo-aacenc skipped: feature voaacenc disabled
Dependency vo-amrwbenc skipped: feature voamrwbenc disabled
Dependency libdrm found: YES 2.4.102 (cached)
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency nice found: YES 0.1.17
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency webrtc-audio-processing found: YES 0.3.1
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency libwebp found: YES 1.1.0
Run-time dependency wildmidi found: NO (tried pkgconfig and cmake)
Has header "wildmidi_lib.h" : YES
Fetching value of define "LIBWILDMIDI_VER_MAJOR" : 0L
Fetching value of define "LIBWILDMIDI_VER_MINOR" : 4L
Library WildMidi found: YES
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency wpe-webkit-1.0 found: YES 2.29.90
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency wpebackend-fdo-1.0 found: YES 1.7.1
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency egl found: YES 1.5
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency xkbcommon found: YES 1.0.0
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency wayland-server found: YES 1.18.0
Dependency x265 skipped: feature x265 disabled
Dependency zxing skipped: feature zxing disabled
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency zbar found: YES 0.23
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency libexif found: YES 0.6.22
Header <faac.h> has symbol "faacEncOpen" : YES (cached)
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gstreamer-plugins-base-1.0 found: YES 1.18.0
Library orc-test-0.4 found: YES
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gtk+-3.0 found: YES 3.24.23
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gdk-x11-3.0 found: YES 3.24.23
Compiler for C supports link arguments -fvisibility=default: YES
Using 'PKG_CONFIG_PATH' from environment with value: ':/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Run-time dependency gmodule-export-2.0 found: YES 2.65.3
Dependency x11 found: YES 1.6.12 (cached)
Has header "sys/socket.h" : YES (cached)
Checking for function "kill" : YES
Checking for function "socketpair" : YES
Checking for function "fcntl" : YES
Checking for function "fork" : YES

tests/examples/meson.build:12:0: ERROR: Unknown variable "opencv_dep".