https://elinux.org/R-Car/Boards/Yocto-Gen3/v5.1.0 is the guide that I am following and I am doing the manual build.
I am going to leave my terminal code attached to this post and please feel free to let me know why I am receiving the error for the R-car Gen-3. Thank you!
e-OptiPlex-5040:~$ mkdir build
e-OptiPlex-5040:~$ cd build
e-OptiPlex-5040:~/build$ export WORK=`pwd`
e-OptiPlex-5040:~/build$ cd $WORK
e-OptiPlex-5040:~/build$ git clone git://git.yoctoproject.org/pokyCloning into 'poky'...remote: Enumerating objects: 519347, done.remote: Counting objects: 100% (519347/519347), done.remote: Compressing objects: 100% (122932/122932), done.remote: Total 519347 (delta 389000), reused 518455 (delta 388345)Receiving objects: 100% (519347/519347), 175.44 MiB | 6.57 MiB/s, done.Resolving deltas: 100% (389000/389000), done.e-OptiPlex-5040:~/build$ git clone git://git.openembedded.org/meta-openembeddedCloning into 'meta-openembedded'...remote: Counting objects: 157137, done.remote: Compressing objects: 100% (52356/52356), done.remote: Total 157137 (delta 98358), reused 156101 (delta 97752)Receiving objects: 100% (157137/157137), 40.96 MiB | 9.81 MiB/s, done.Resolving deltas: 100% (98358/98358), done.
e-OptiPlex-5040:~/build$ git clone git://github.com/renesas-rcar/meta-renesasCloning into 'meta-renesas'...remote: Enumerating objects: 9519, done.remote: Counting objects: 100% (1660/1660), done.remote: Compressing objects: 100% (778/778), done.remote: Total 9519 (delta 918), reused 1438 (delta 763), pack-reused 7859Receiving objects: 100% (9519/9519), 5.61 MiB | 3.46 MiB/s, done.Resolving deltas: 100% (5398/5398), done.
e-OptiPlex-5040:~/build$ cd $WORK/poky
e-OptiPlex-5040:~/build/poky$ git checkout -b tmp 424296bf9bb4bae27febf91bce0118df09ce5fa1Switched to a new branch 'tmp'
e-OptiPlex-5040:~/build/poky$ cd $WORK/meta-openembeddede-OptiPlex-5040:~/build/meta-openembedded$ git checkout -b tmp f2d02cb71eaff8eb285a1997b30be52486c160aeSwitched to a new branch 'tmp'
e-OptiPlex-5040:~/build/meta-openembedded$ cd $WORK/meta-renesase-OptiPlex-5040:~/build/meta-renesas$ git checkout -b tmp fd8ab2bb1b5ca98483c6f4aecf09a85c4d6bc016Switched to a new branch 'tmp'
e-OptiPlex-5040:~/build/meta-renesas$ cd ${WORK}
e-OptiPlex-5040:~/build$ curl -sO https://elinux.org/images/6/6a/Update-meta-rcar-for-Yv510-20210531.patch.zip
e-OptiPlex-5040:~/build$ unzip -qo Update-meta-rcar-for-Yv510-20210531.patch.zip
e-OptiPlex-5040:~/build$ cd ${WORK}/meta-renesas
e-OptiPlex-5040:~/build/meta-renesas$ patch -p1 < ../Update-meta-rcar-for-Yv510-20210531.patchpatching file meta-rcar-gen3/recipes-bsp/arm-trusted-firmware/arm-trusted-firmware/0001-Revert-rcar_gen3-plat-Delete-FDT-function-calls.patchpatching file meta-rcar-gen3/recipes-bsp/arm-trusted-firmware/arm-trusted-firmware/0002-rcar_gen3-plat-Fix-DRAM-size-judgment-by-PRR-registe.patchpatching file meta-rcar-gen3/recipes-bsp/arm-trusted-firmware/arm-trusted-firmware/0003-rcar_gen3-plat-Factor-out-DT-memory-node-generation.patchpatching file meta-rcar-gen3/recipes-bsp/arm-trusted-firmware/arm-trusted-firmware/0004-rcar_gen3-plat-Generate-two-memory-nodes-for-larger-.patchpatching file meta-rcar-gen3/recipes-bsp/arm-trusted-firmware/arm-trusted-firmware_git.bbpatching file meta-rcar-gen3/recipes-bsp/u-boot/u-boot/0001-ARM-renesas-Scrub-duplicate-memory-nodes-from-DT-on-.patchpatching file meta-rcar-gen3/recipes-bsp/u-boot/u-boot_2020.10.bbpatching file meta-rcar-gen3/recipes-kernel/linux/linux-renesas/0001-arm64-dts-r8a77961-Fix-video-codec-relation-node.patchpatching file meta-rcar-gen3/recipes-kernel/linux/linux-renesas/add-intc_ex-for-r8a77961.patchpatching file meta-rcar-gen3/recipes-kernel/linux/linux-renesas/cpufreq-boost-for-rcar-5.0.0.rc4.patchpatching file meta-rcar-gen3/recipes-kernel/linux/linux-renesas_5.10.bbe-OptiPlex-5040:~/build/meta-renesas$ ls -1 $WORK/proprietary/*.zip/home/evanmeyer/build/proprietary/R-Car_Gen3_Series_Evaluation_Software_Package_for_Linux-20210428.zip/home/evanmeyer/build/proprietary/R-Car_Gen3_Series_Evaluation_Software_Package_of_Linux_Drivers-20210428.zipe-OptiPlex-5040:~/build$ export PKGS_DIR=$WORK/proprietary
e-OptiPlex-5040:~/build$ cd $PKGS_DIR
e-OptiPlex-5040:~/build/proprietary$ unzip -qo R-Car_Gen3_Series_Evaluation_Software_Package_for_Linux-20210428.zip
e-OptiPlex-5040:~/build/proprietary$ unzip -qo R-Car_Gen3_Series_Evaluation_Software_Package_of_Linux_Drivers-20210428.zip
e-OptiPlex-5040:~/build/meta-renesas$ sh meta-rcar-gen3/docs/sample/copyscript/copy_proprietary_softwares.sh -f $PKGS_DIRCopyscript for R-Car Gen3
Copying for Graphic PackagesRTM8RC7795ZG300Q10JPL3E not found!RTM8RC7796ZG300Q10JPL3E not found!RTM8RC7796ZG300Q50JPL3E not found!RTM8RC7799ZG300Q00JPL3E not found!Skip MD5 : INF_r8a77951_linux_gsx_binaries_gles.tar.bz2file1 top : INFRTM8RC7795ZG300Q10JPL3E_4_0_1Skip MD5 : GSX_KM_H3.tar.bz2file2 top : RCH3G001L5101ZDO_4_0_1Installed GFX package : INFRTM8RC7795ZG300Q10JPL3E : RCH3G001L5101ZDO
Skip MD5 : INF_r8a77960_linux_gsx_binaries_gles.tar.bz2file1 top : INFRTM8RC7796ZG300Q10JPL3E_4_0_1Skip MD5 : GSX_KM_M3.tar.bz2file2 top : RCM3G001L5101ZDO_4_0_1Installed GFX package : INFRTM8RC7796ZG300Q10JPL3E : RCM3G001L5101ZDO
INFRTM8RC7796ZG300Q50JPL3E not found!INFRTM8RC7799ZG300Q00JPL3E not found!
Packages for GFX module were found and copied./=======================================================/
Copying for Audio Common PackagesSkip MD5 : RTM8RC0000ZMX0LQ00JPL3E.tar.bz2Skip MD5 : RTM8RC0000ZNX0LQ00JPL3E.tar.gzSkip MD5 : RTM8RC0000ZND1LQ00JPL3E.tar.gzaacPlusV2_decoder_lib not found!MP3_decoder_lib not found!WMA_decoder_lib not found!Skip MD5 : RTM8RC0000ZNE1LQ00JPL3E.tar.gzALAC_decoder_lib not found!FLAC_decoder_lib not found!Dolby_decoder_lib not found!
Install for OMX Common PackagesInstalled omx_common_lib : RTM8RC0000ZMX0LQ00JPL3EInstalled audio_common : RTM8RC0000ZNX0LQ00JPL3EInstalled AAC-LC_decoder_lib : RTM8RC0000ZND1LQ00JPL3EaacPlusV2_decoder_lib not found!MP3_decoder_lib not found!WMA_decoder_lib not found!Installed AAC-LC_encoder_lib : RTM8RC0000ZNE1LQ00JPL3EALAC_decoder_lib not found!FLAC_decoder_lib not found!Dolby_decoder_lib not found!
Packages for Audio module were found and copied./=======================================================/
Copying for Audio M/W PackagesSkip MD5 : RTM8RC0000ZAD1LQ00JPL3E.tar.gzaacPlusV2_decoder_M/W not found!MP3_decoder_M/W not found!WMA_decoder_M/W not found!Skip MD5 : RTM8RC0000ZAE1LQ00JPL3E.tar.gzDDD_decoder_M/W not found!Installed AAC-LC_decoder_M/W : RTM8RC0000ZAD1LQ00JPL3EaacPlusV2_decoder_M/W not found!MP3_decoder_M/W not found!WMA_decoder_M/W not found!Installed AAC-LC_encoder_M/W : RTM8RC0000ZAE1LQ00JPL3EDDD_decoder_M/W not found!
Packages for Audio M/W module were found and copied./=======================================================/
Copying for Video Decoder PackagesOMX Common Library already installedSkip MD5 : RTM8RC0000ZMX0DQ00JFL3E.tar.bz2
Copying for Video Decoder Library PackagesSkip MD5 : RTM8RC0000ZMD0LQ00JPL3E.tar.bz2H263_decoder not found!Skip MD5 : RTM8RC0000ZMD1LQ00JPL3E.tar.bz2H265_decoder not found!MPEG2_decoder not found!MPEG4_decoder not found!VC1_decoder not found!DivX_decoder not found!RealVideo_decoder not found!VP8_decoder not found!VP9_decoder not found!
Installed UVCS driverInstalled uvcs_lib : RTM8RC0000ZMX0DQ00JFL3EInstalled video_dec_common : RTM8RC0000ZMD0LQ00JPL3EH263_decoder not found!Installed H264_decoder : RTM8RC0000ZMD1LQ00JPL3EH265_decoder not found!MPEG2_decoder not found!MPEG4_decoder not found!VC1_decoder not found!DivX_decoder not found!RealVideo_decoder not found!VP8_decoder not found!VP9_decoder not found!
Packages for video decoder module were found and copied./=======================================================/
Copying for Video Encoder PackagesOMX Common Library already installedUVCS driver already installed
Copying for Video Encoder Library PackagesSkip MD5 : RTM8RC0000ZME0LQ00JPL3E.tar.bz2Skip MD5 : RTM8RC0000ZME1LQ00JPL3E.tar.bz2VP8_encoder not found!Installed video_enc_common : RTM8RC0000ZME0LQ00JPL3EInstalled H264_encoder : RTM8RC0000ZME1LQ00JPL3EVP8_encoder not found!
Packages for video encoder module were found and copied./=======================================================/
Copying for DTV/DVD Packages
Copying for DTV kernel moduledtv_km not found!
DTV kernel library not found!
Copying for DTV Library PackagesDTV kernel module not found!Skip DTV Package
Copying for DVD Library Packagesdvd_lib not found!dvd_encrypt_lib not found!
DVD library not found
Copying for CMS Packagesbcm not found!blc not found!dgc not found!Skip CMS package
Copying for ADSP Packagesadsp_driver not found!Skip ADSP Package
Copying for ICCOM Packagesiccom_mfis not found!Skip ICCOM Package
cleanup temp directoryComplete copying !
This is a general copy script for all R-Car Gen3. You will always have files which are not found. The GFX files found and installed are for an H3. So, if you are building for an H3 you will be OK.
OK, but what is your issue?
does the command "bitbake core-image-weston" work?
Please, can you send your bitbake log.
Thanks