I can make minimal，but can't make bpftool，why？ #286
Description
Ubuntu 22.04 LTS：6.8.0-40-generic
I've read the Readme
apt install clang libelf1 libelf-dev zlib1g-dev
git clone --recurse-submodules https://github.com/libbpf/libbpf-bootstrap
git submodule update --init --recursive
cd examples/c
make
OUTPUT:
MKDIR .output
MKDIR .output/libbpf
LIB libbpf.a
make[1]: pkg-config: 没有那个文件或目录
MKDIR /home/ruid/libbpf-bootstrap/examples/c/.output//libbpf/staticobjs
CC /home/ruid/libbpf-bootstrap/examples/c/.output//libbpf/staticobjs/bpf.o
CC /home/ruid/libbpf-bootstrap/examples/c/.output//libbpf/staticobjs/btf.o
CC /home/ruid/libbpf-bootstrap/examples/c/.output//libbpf/staticobjs/libbpf.o
CC /home/ruid/libbpf-bootstrap/examples/c/.output//libbpf/staticobjs/libbpf_errno.o
CC /home/ruid/libbpf-bootstrap/examples/c/.output//libbpf/staticobjs/netlink.o
CC /home/ruid/libbpf-bootstrap/examples/c/.output//libbpf/staticobjs/nlattr.o
CC /home/ruid/libbpf-bootstrap/examples/c/.output//libbpf/staticobjs/str_error.o
CC /home/ruid/libbpf-bootstrap/examples/c/.output//libbpf/staticobjs/libbpf_probes.o
CC /home/ruid/libbpf-bootstrap/examples/c/.output//libbpf/staticobjs/bpf_prog_linfo.o
CC /home/ruid/libbpf-bootstrap/examples/c/.output//libbpf/staticobjs/btf_dump.o
CC /home/ruid/libbpf-bootstrap/examples/c/.output//libbpf/staticobjs/hashmap.o
CC /home/ruid/libbpf-bootstrap/examples/c/.output//libbpf/staticobjs/ringbuf.o
CC /home/ruid/libbpf-bootstrap/examples/c/.output//libbpf/staticobjs/strset.o
CC /home/ruid/libbpf-bootstrap/examples/c/.output//libbpf/staticobjs/linker.o
CC /home/ruid/libbpf-bootstrap/examples/c/.output//libbpf/staticobjs/gen_loader.o
CC /home/ruid/libbpf-bootstrap/examples/c/.output//libbpf/staticobjs/relo_core.o
CC /home/ruid/libbpf-bootstrap/examples/c/.output//libbpf/staticobjs/usdt.o
CC /home/ruid/libbpf-bootstrap/examples/c/.output//libbpf/staticobjs/zip.o
CC /home/ruid/libbpf-bootstrap/examples/c/.output//libbpf/staticobjs/elf.o
CC /home/ruid/libbpf-bootstrap/examples/c/.output//libbpf/staticobjs/features.o
AR /home/ruid/libbpf-bootstrap/examples/c/.output//libbpf/libbpf.a
INSTALL bpf.h libbpf.h btf.h libbpf_common.h libbpf_legacy.h bpf_helpers.h bpf_helper_defs.h bpf_tracing.h bpf_endian.h bpf_core_read.h skel_internal.h libbpf_version.h usdt.bpf.h
INSTALL /home/ruid/libbpf-bootstrap/examples/c/.output//libbpf/libbpf.pc
INSTALL /home/ruid/libbpf-bootstrap/examples/c/.output//libbpf/libbpf.a
MKDIR bpftool
BPFTOOL bpftool/bootstrap/bpftool
... libbfd: [ OFF ]
... clang-bpf-co-re: [ on ]
... llvm: [ OFF ]
... libcap: [ OFF ]
MKDIR /home/ruid/libbpf-bootstrap/examples/c/.output/bpftool/bootstrap/libbpf/include/bpf
INSTALL /home/ruid/libbpf-bootstrap/examples/c/.output/bpftool/bootstrap/libbpf/include/bpf/hashmap.h
INSTALL /home/ruid/libbpf-bootstrap/examples/c/.output/bpftool/bootstrap/libbpf/include/bpf/relo_core.h
INSTALL /home/ruid/libbpf-bootstrap/examples/c/.output/bpftool/bootstrap/libbpf/include/bpf/libbpf_internal.h
MKDIR /home/ruid/libbpf-bootstrap/examples/c/.output/bpftool/bootstrap/
MKDIR /home/ruid/libbpf-bootstrap/examples/c/.output/bpftool/bootstrap/libbpf/
make[2]: pkg-config: 没有那个文件或目录
......
But, sudo ./bootstrap work successfully.
Than , cd bpftool/src && make
... libbfd: [ OFF ]
... clang-bpf-co-re: [ on ]
... llvm: [ OFF ]
... libcap: [ OFF ]
GEN pid_iter.skel.h
CC pids.o
CLANG profiler.bpf.o
make: llvm-strip: 没有那个文件或目录
make: *** [Makefile:209：profiler.bpf.o] 错误 127
What's wrong with me?