Compiling eBPF program in Docker fails due to missing '__u64' type

I'm trying to compile an eBPF program inside a Docker container based on an ARM64 Ubuntu 20.04 image. I'm encountering a compilation error where the clang compiler cannot find the definition for the __u64 type, which should be provided by the kernel headers. Here's the error I'm getting:

/usr/include/bpf/bpf_helper_defs.h:78:90: error: unknown type name '__u64'static long (* const bpf_map_update_elem)(void *map, const void *key, const void *value, __u64 flags) = (void *) 2;                                                                                          ^

I've installed the linux-headers-${KERNEL_VERSION} package and set up the include paths for clang as follows:

RUN clang -O2 -target bpf \    -I/usr/src/linux-headers-${KERNEL_VERSION}/include \    -I/usr/src/linux-headers-${KERNEL_VERSION}/include/uapi \    -I/usr/src/linux-headers-${KERNEL_VERSION}/arch/arm64/include \    -I/usr/include/aarch64-linux-gnu \    -I/usr/include/aarch64-linux-gnu/asm \    -I/usr/include/aarch64-linux-gnu/asm-generic \    -I/usr/include/bpf \    -c ebpf_program.c -o ebpf_program.o

I've also created symbolic links to ensure that the asm and asm-generic directories are correctly referenced:

RUN ln -s /usr/include/aarch64-linux-gnu/asm /usr/include/asmRUN ln -s /usr/include/aarch64-linux-gnu/asm-generic /usr/include/asm-generic

The clang compiler still cannot find the asm/types.h file. I've verified that the file exists and is accessible in the container. Here's the output when I SSH into the container:

root@container:/usr/include/aarch64-linux-gnu/asm# cat types.h #include <asm-generic/types.h>

Here is my full Dockerfile:

# Use a base image that supports ARM64 architecture for Apple Silicon (local machines)FROM --platform=linux/arm64 ubuntu:20.04# Use ARG to specify the kernel version, allowing for flexibilityARG KERNEL_VERSION=5.4.0-174-genericARG DEBIAN_FRONTEND=noninteractive# Install dependenciesRUN apt-get update && apt-get install -y \    bpfcc-tools \    clang \    llvm \    libelf-dev \    zlib1g-dev \    gcc \    iproute2 \    git \    curl \    ca-certificates \    linux-libc-dev \    make \    pkg-config \&& apt-get clean# Install a specific version of the Linux kernel headersRUN apt-get install -y linux-headers-${KERNEL_VERSION}# Install Go for ARM64RUN curl -OL https://golang.org/dl/go1.21.0.linux-arm64.tar.gz \&& tar -C /usr/local -xzf go1.21.0.linux-arm64.tar.gz \&& rm go1.21.0.linux-arm64.tar.gz# Set environment variables for GoENV PATH=$PATH:/usr/local/go/binENV GOPATH=/goENV PATH=$PATH:$GOPATH/bin# Copy your Go application source code and module files into the containerCOPY src /go/src/go_user_agent# Set the working directory to the Go user agent script's locationWORKDIR /go/src/go_user_agent/# Clone the libbpf repository and build itRUN git clone https://github.com/libbpf/libbpf.git /usr/src/libbpf && \    cd /usr/src/libbpf/src && \    make && \    make install# Create a symbolic link from /usr/include/aarch64-linux-gnu/asm to /usr/include/asmRUN ln -s /usr/include/aarch64-linux-gnu/asm /usr/include/asm# Create a symbolic link from /usr/include/aarch64-linux-gnu/asm-generic to /usr/include/asm-genericRUN ln -s /usr/include/aarch64-linux-gnu/asm-generic /usr/include/asm-generic# Set the KERNEL_HEADERS_DIR environment variable to the path of the installed kernel headersENV KERNEL_HEADERS_DIR=/usr/src/linux-headers-${KERNEL_VERSION}# Compile the eBPF program using the correct include pathsRUN clang -O2 -target bpf \    -I$KERNEL_HEADERS_DIR/include \    -I$KERNEL_HEADERS_DIR/include/linux \    -I$KERNEL_HEADERS_DIR/include/uapi \    -I$KERNEL_HEADERS_DIR/arch/arm64/include \    -I/usr/include/aarch64-linux-gnu \    -I/usr/include/asm-generic \    -I/usr/include/bpf \    -c ebpf_program.c -o ebpf_program.o# Download dependenciesRUN go get -d -v# Run tests and benchmarksRUN go test -v ./... # Run all tests# Run benchmarks and capture CPU profilesRUN go test -bench . -benchmem -cpuprofile cpu.prof -o bench.test# Build the Go user agent scriptRUN go build -o go_user_agent# Command to run the user agent scriptCMD ["./go_user_agent"]

I'm stuck and not sure what else I can do to resolve this issue. Has anyone encountered a similar problem, or can you provide guidance on what might be going wrong?