On Wed, Feb 24, 2021 at 05:27:52AM +0000, Kun-Chuan Hsieh wrote: > 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. > > Cc: stable@xxxxxxxxxxxxxxx > > Signed-off-by: Kun-Chuan Hsieh <jetswayss@xxxxxxxxx> Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx> thanks, jirka > --- > 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 7409d7860aa6..80d966cfcaa1 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 > -- > 2.25.1 >
