bpf: Generate BTF_KIND_FLOAT when linking vmlinux
commit db16c1fe upstream. [backported for dependency only extra_paholeopt variable setup and usage, we don't want floats generated in 5.10] pahole v1.21 supports the --btf_gen_floats flag, which makes it generate the information about the floating-point types [1]. Adjust link-vmlinux.sh to pass this flag to pahole in case it's supported, which is determined using a simple version check. [1] https://lore.kernel.org/dwarves/YHRiXNX1JUF2Az0A@kernel.org/ Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210413190043.21918-1-iii@linux.ibm.com Signed-off-by: Jiri Olsa <jolsa@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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