On Sat, 6 Jan 2024 10:23:57 +0000 Madhuker Mythri <madhuker.myt...@oracle.com> wrote:
> Hi Stephen, > > The new Kernel expects the BPF maps in BTF format: > https://www.kernel.org/doc/html/v5.4/bpf/btf.html. > So, we need to compile with "-g" option as follows: > ============================== > clang -O2 -target bpf -c tap_bpf_program.c -g -o tap_bpf_program.o > ============================= > > I had cross check this functionality with DPDK-22.11 and as the BPF C-program > is same had modified just the C-program and submitted for review. > I will update the Makefile changes also and will publish for code-review once > again w.r.t DPDK-23.11. > > Thanks, Makefile needs something like this (from libbpf) to find clang includes. And bpf extract program then needs to change as well. # Get Clang's default includes on this system. We'll explicitly add these dirs # to the includes list when compiling with `-target bpf` because otherwise some # architecture-specific dirs will be "missing" on some architectures/distros - # headers such as asm/types.h, asm/byteorder.h, asm/socket.h, asm/sockios.h, # sys/cdefs.h etc. might be missing. # # Use '-idirafter': Don't interfere with include mechanics except where the # build would have failed anyways. CLANG_BPF_SYS_INCLUDES ?= $(shell $(CLANG) -v -E - </dev/null 2>&1 \ | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }')
