mirror of
https://github.com/netdata/libbpf.git
synced 2026-03-20 16:29:07 +08:00
438584bfc2
libbpf uses libelf symbols internally, so it depends on it and needs to link against it. Upstream this was fixed by linking directory to libelf: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=89dedaef49d36adc2bb5e7e4c38b52fa3013c7c8 For this project, intended to be used as a general library, try first to use pkg-config instead, and only fallback to just passing -lelf. This will be useful for cross compiling, among other cases. Signed-off-by: Luca Boccassi <luca.boccassi@microsoft.com>
46 lines
1.9 KiB
Plaintext
46 lines
1.9 KiB
Plaintext
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This is a mirror of bpf-next linux tree
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(https://kernel.googlesource.com/pub/scm/linux/kernel/git/bpf/bpf-next)
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bpf-next/tools/lib/bpf directory plus its supporting header files.
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The following files will by sync'ed with bpf-next repo:
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src/ <-> bpf-next/tools/lib/bpf/
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include/uapi/linux/bpf_common.h <-> bpf-next/tools/include/uapi/linux/bpf_common.h
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include/uapi/linux/bpf.h <-> bpf-next/tools/include/uapi/linux/bpf.h
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include/uapi/linux/btf.h <-> bpf-next/tools/include/uapi/linux/btf.h
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include/uapi/linux/if_link.h <-> bpf-next/tools/include/uapi/linux/if_link.h
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include/uapi/linux/if_xdp.h <-> bpf-next/tools/include/uapi/linux/if_xdp.h
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include/uapi/linux/netlink.h <-> bpf-next/tools/include/uapi/linux/netlink.h
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include/tools/libc_compat.h <-> bpf-next/tools/include/tools/libc_compat.h
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Other header files at this repo (include/linux/*.h) are reduced versions of
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their counterpart files at bpf-next/tools/include/linux/*.h to make compilation
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successful.
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Build
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=====
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libelf is an internal dependency of libbpf and thus it is required to link
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against and must be installed on the system for applications to work.
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pkg-config is used by default to find libelf, and the program called can be
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overridden with PKG_CONFIG.
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If using pkg-config at build time is not desired, it can be disabled by setting
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NO_PKG_CONFIG=1 when calling make.
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To build both static libbpf.a and shared libbpf.so:
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cd src
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make
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To build only static libbpf.a library in directory
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build/ and install them together with libbpf headers in a staging directory
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root/:
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cd src
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mkdir build root
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BUILD_STATIC_ONLY=y OBJDIR=build DESTDIR=root make install
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To build both static libbpf.a and shared libbpf.so against a custom libelf
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dependency installed in /build/root/ and install them together with libbpf
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headers in a build directory /build/root/:
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cd src
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PKG_CONFIG_PATH=/build/root/lib64/pkgconfig DESTDIR=/build/root make install
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