bpftool: add host build

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

View File

@ -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))