From 41462c6e730ca0e63f5fed5a517052385d980c54 Mon Sep 17 00:00:00 2001 From: Kun-Chuan Hsieh Date: Wed, 24 Feb 2021 05:27:52 +0000 Subject: [PATCH] tools/resolve_btfids: Fix build error with older host toolchains 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 Signed-off-by: Daniel Borkmann Acked-by: Jiri Olsa Link: https://lore.kernel.org/bpf/20210224052752.5284-1-jetswayss@gmail.com --- tools/bpf/resolve_btfids/main.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/tools/bpf/resolve_btfids/main.c b/tools/bpf/resolve_btfids/main.c index 7409d78..80d966c 100644 --- 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 rb_root *root, char *name, size_t size) 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 -- 2.7.4