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Code Issues

bpftool: add host build

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Besides probing BPF information in running system, bpftool is also used in
generating skeleton, dumping BTF, etc. that is widely used in modern BPF
development. Make it available as a host tool so that we can use it in
package build.

Tested build targeting malta/le on Arch Linux x86_64. bpftools currently
does not support processing cross-endian BPF objects, so big-endian host
is needed to build for big-endian targets using bpftools.

Signed-off-by: Eric Long <i@hack3r.moe>
Link: https://github.com/openwrt/openwrt/pull/16122
Signed-off-by: Robert Marko <robimarko@gmail.com>
This commit is contained in:
Eric Long 2024-08-10 00:42:34 +08:00 committed by Robert Marko
parent 2bec6f48e6
commit 21b155e0ff
1 changed files with 28 additions and 0 deletions
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28
package/network/utils/bpftool/Makefile
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@ -22,8 +22,11 @@ PKG_BUILD_FLAGS:=no-mips16 gc-sections lto
PKG_BUILD_PARALLEL:=1
PKG_INSTALL:=1
HOST_BUILD_PARALLEL:=1
include $(INCLUDE_DIR)/package.mk
include $(INCLUDE_DIR)/nls.mk
include $(INCLUDE_DIR)/host-build.mk
define Package/bpftool/Default
SECTION:=net
@ -88,5 +91,30 @@ define Package/bpftool-$(BUILD_VARIANT)/install
$(1)/usr/libexec/bpftool-$(BUILD_VARIANT)
endef
HOST_MAKE_FLAGS += \
OUTPUT="$(HOST_BUILD_DIR)/" \
prefix="/usr" \
$(if $(findstring c,$(OPENWRT_VERBOSE)),V=1,V='') \
check_feat=0 \
feature-clang-bpf-co-re=0 \
feature-libbfd=1 \
feature-llvm=0 \
feature-libcap=0 \
feature-disassembler-four-args=1 \
feature-disassembler-init-styled=1
HOST_MAKE_PATH = src
define Host/Install
$(INSTALL_DIR) $(STAGING_DIR_HOST)/usr/sbin
$(INSTALL_BIN) $(HOST_BUILD_DIR)/bpftool \
$(STAGING_DIR_HOST)/usr/sbin/bpftool
endef
define Host/Clean
rm -f $(STAGING_DIR_HOST)/usr/sbin/bpftool
endef
$(eval $(call BuildPackage,bpftool-full))
$(eval $(call BuildPackage,bpftool-minimal))
$(eval $(call HostBuild))