If on the host machine the "co-re" is supported, bpftool will
build a bootstrap version of itself as well. In that case, the
cross compilation can fail. This commit adds a patch to remedy
that. The fix that you see here is already upsteamed [1].
[1]
https://lore.kernel.org/bpf/165477661272.11342.13015777410417612477.git-patchwork-notify@kernel.org/T/#t
Signed-off-by: Shahab Vahedi <shahab@synopsys.com>
[Arnout: use upstream metadata for the patch]
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
bpftool needs __sync_*_4 intrisics since its addition in commit
3675131e6c and
b0c3d7133f:
/nvmedata/autobuild/instance-26/output-1/host/opt/ext-toolchain/bin/../lib/gcc/sparc-buildroot-linux-uclibc/10.3.0/../../../../sparc-buildroot-linux-uclibc/bin/ld: /nvmedata/autobuild/instance-26/output-1/build/bpftool-v6.7.0/src/libbpf/libbpf.a(libbpf.o): in function `bpf_program__attach_kprobe_opts':
libbpf.c:(.text+0xff88): undefined reference to `__sync_fetch_and_add_4'
Fixes:
- http://autobuild.buildroot.org/results/919b8351d3783ca30a860df87ae814d5c4b9fd41
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
bpftool uses its own local copy of libbpf so add
BR2_PACKAGE_BPFTOOL_ARCH_SUPPORTS to avoid the following build failure
on ARM:
btf.c: In function 'btf_type_by_id':
btf.c:461:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
if (type_id < btf->start_id)
^
bpf.c:62:4: error: #error __NR_bpf not defined. libbpf does not support your arch.
# error __NR_bpf not defined. libbpf does not support your arch.
^
Fixes:
- http://autobuild.buildroot.org/results/aae772f1cfb16516a57f310c4f022e80a2a8d65e
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
NETLINK_EXT_ACK is only available since kernel 4.12 and
2d4bc93368
resulting in the following build failure since addition of the package
in commit 3675131e6c:
net.c: In function 'netlink_open':
net.c:110:36: error: 'NETLINK_EXT_ACK' undeclared (first use in this function); did you mean 'NETLINK_CAP_ACK'?
110 | if (setsockopt(sock, SOL_NETLINK, NETLINK_EXT_ACK,
| ^~~~~~~~~~~~~~~
| NETLINK_CAP_ACK
Fixes:
- http://autobuild.buildroot.org/results/c61678e56bd73609838747048f27068818c21150
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Move the target bpftool build out of linux-tools so that it is
up to date.
This also fixes build issues due to differences between kernel
versions. The latest version should be fully backwards compatible.
The host bpftool is needed for enabling features such as the systemd
bpf-framework (to be added in a future patch).
Use the git download method to get the libbpf submodule.
Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
