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When cross-compiling [1], the get_sys_includes make macro should use the target system include path, and not the build hosts system include path. Make clang honor the CROSS_COMPILE triple. [1] e.g. "ARCH=riscv CROSS_COMPILE=riscv64-linux-gnu- make" Signed-off-by: Björn Töpel <bjorn@rivosinc.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Tested-by: Anders Roxell <anders.roxell@linaro.org> Link: https://lore.kernel.org/bpf/20221115182051.582962-2-bjorn@kernel.org