From: Greg Kroah-Hartman gregkh@linuxfoundation.org
From: Kun-Chuan Hsieh jetswayss@gmail.com
commit 41462c6e730ca0e63f5fed5a517052385d980c54 upstream.
Older libelf.h and glibc elf.h might not yet define the ELF compression types.
Checking and defining SHF_COMPRESSED fix the build error when compiling with older toolchains. Also, the tool resolve_btfids is compiled with host toolchain. The host toolchain is more likely to be older than the cross compile toolchain.
Fixes: 51f6463aacfb ("tools/resolve_btfids: Fix sections with wrong alignment") Signed-off-by: Kun-Chuan Hsieh jetswayss@gmail.com Signed-off-by: Daniel Borkmann daniel@iogearbox.net Acked-by: Jiri Olsa jolsa@redhat.com Link: https://lore.kernel.org/bpf/20210224052752.5284-1-jetswayss@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- tools/bpf/resolve_btfids/main.c | 5 +++++ 1 file changed, 5 insertions(+)
--- a/tools/bpf/resolve_btfids/main.c +++ b/tools/bpf/resolve_btfids/main.c @@ -260,6 +260,11 @@ static struct btf_id *add_symbol(struct return btf_id__add(root, id, false); }
+/* Older libelf.h and glibc elf.h might not yet define the ELF compression types. */ +#ifndef SHF_COMPRESSED +#define SHF_COMPRESSED (1 << 11) /* Section with compressed data. */ +#endif + /* * The data of compressed section should be aligned to 4 * (for 32bit) or 8 (for 64 bit) bytes. The binutils ld