I can't get flatc installed into my yocto based SDK - yocto

Question

I am doing bitbake image -c populate_sdk to get my SDK but I can't find a way to get the flatc binary included in the SDK.
I have tried a do_install_append in my flatbuffers.bb file and I have put dependencies on various flatbuffers things in another .bb file. I have added to TOOLCHAIN_HOST_TASK_append in my machine .conf file.
I do get the flatbuffers header files in the SDK but only the ARM flatc not the native one.
Here is the dependency I put in the .bb file for a custom binary we have:
DEPENDS += "yaml-cpp libevent protobuf python3 nativesdk-flatbuffers flatbuffers-native flatbuffers"
DEPENDS_append_class-nativesdk = " flatbuffers"
Here is my flatbuffers .bb file
SUMMARY = "Memory Efficient Serialization Library"
HOMEPAGE = "https://github.com/google/flatbuffers"
SECTION = "console/tools"
LICENSE = "Apache-2.0"
PACKAGE_BEFORE_PN = "${PN}-compiler"
RDEPENDS_${PN}-compiler = "${PN}"
RDEPENDS_${PN}-dev += "${PN}-compiler"
LIC_FILES_CHKSUM = "file://LICENSE.txt;md5=a873c5645c184d51e0f9b34e1d7cf559"
SRCREV = "c0698cc33f1e534bb59c455909b88cc2726089af"
SRC_URI = "git://github.com/google/flatbuffers.git"
# Make sure C++11 is used, required for example for GCC 4.9
CXXFLAGS += "-std=c++11"
BUILD_CXXFLAGS += "-std=c++11"
# BUILD_TYPE=Release is required, otherwise flatc is not installed
EXTRA_OECMAKE += "\
-DCMAKE_BUILD_TYPE=Release \
-DFLATBUFFERS_BUILD_TESTS=OFF \
-DFLATBUFFERS_BUILD_SHAREDLIB=ON \
"
# -DFLATBUFFERS_BUILD_FLATC=ON
#do_install_append() {
# install -d ${$D}/${bindir}
# install ${B}/flatc ${D}${bindir}
#}
inherit cmake
S = "${WORKDIR}/git"
FILES_${PN}-compiler = "${bindir}"
FILES_${PN} += "/usr/lib/*"
FILES_${PN} += "/opt/ousteros/2019.7/sysroots/*"
#FILES_${PN} += "${WORKDIR}/${SDK_ARCH}/usr/bin/flatc"
BBCLASSEXTEND = "native nativesdk"
I get the ARM flatc but not the x86_64 flatc which I need to build a header file that my other binary will need. My other binary doesn't yet require that header file, I first want to generate an SDK with flatc in it.

Answer 1

Don't mix target and nativesdk packages in DEPENDS.
To add native tools to the SDK you need to add nativesdk-flatbuffers-compiler to TOOLCHAIN_HOST_TASK in the image recipe that the SDK is created from.