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Message-ID: <20220415133839.y6tjf3ymbvbrntx4@apollo.legion> Date: Fri, 15 Apr 2022 19:08:39 +0530 From: Kumar Kartikeya Dwivedi <memxor@...il.com> To: Alexander Lobakin <alobakin@...me> Cc: Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, Andrii Nakryiko <andrii@...nel.org>, Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, Arnaldo Carvalho de Melo <acme@...nel.org>, Mark Rutland <mark.rutland@....com>, Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, Namhyung Kim <namhyung@...nel.org>, Martin KaFai Lau <kafai@...com>, Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>, John Fastabend <john.fastabend@...il.com>, KP Singh <kpsingh@...nel.org>, "David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, Jesper Dangaard Brouer <hawk@...nel.org>, Björn Töpel <bjorn@...nel.org>, Magnus Karlsson <magnus.karlsson@...el.com>, Jonathan Lemon <jonathan.lemon@...il.com>, Nathan Chancellor <nathan@...nel.org>, Nick Desaulniers <ndesaulniers@...gle.com>, Dmitrii Dolgov <9erthalion6@...il.com>, Quentin Monnet <quentin@...valent.com>, Tiezhu Yang <yangtiezhu@...ngson.cn>, Chenbo Feng <fengc@...gle.com>, Willem de Bruijn <willemb@...gle.com>, Daniel Wagner <daniel.wagner@...-carit.de>, Thomas Graf <tgraf@...g.ch>, Ong Boon Leong <boon.leong.ong@...el.com>, linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, bpf@...r.kernel.org, llvm@...ts.linux.dev Subject: Re: [PATCH bpf-next 05/11] samples: bpf: use host bpftool to generate vmlinux.h, not target On Fri, Apr 15, 2022 at 04:15:50AM IST, Alexander Lobakin wrote: > Use the host build of bpftool (bootstrap) instead of the target one > to generate vmlinux.h/skeletons for the BPF samples. Otherwise, when > host != target, samples compilation fails with: > > /bin/sh: line 1: samples/bpf/bpftool/bpftool: failed to exec: Exec > format error > > Fixes: 384b6b3bbf0d ("samples: bpf: Add vmlinux.h generation support") > Signed-off-by: Alexander Lobakin <alobakin@...me> > --- Acked-by: Kumar Kartikeya Dwivedi <memxor@...il.com> > samples/bpf/Makefile | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > > diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile > index 97203c0de252..02f999a8ef84 100644 > --- a/samples/bpf/Makefile > +++ b/samples/bpf/Makefile > @@ -291,12 +291,13 @@ $(LIBBPF): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(LIBBPF_OU > > BPFTOOLDIR := $(TOOLS_PATH)/bpf/bpftool > BPFTOOL_OUTPUT := $(abspath $(BPF_SAMPLES_PATH))/bpftool > -BPFTOOL := $(BPFTOOL_OUTPUT)/bpftool > +BPFTOOL := $(BPFTOOL_OUTPUT)/bootstrap/bpftool > $(BPFTOOL): $(LIBBPF) $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) | $(BPFTOOL_OUTPUT) > $(MAKE) -C $(BPFTOOLDIR) srctree=$(BPF_SAMPLES_PATH)/../../ \ > OUTPUT=$(BPFTOOL_OUTPUT)/ \ > LIBBPF_OUTPUT=$(LIBBPF_OUTPUT)/ \ > - LIBBPF_DESTDIR=$(LIBBPF_DESTDIR)/ > + LIBBPF_DESTDIR=$(LIBBPF_DESTDIR)/ \ > + bootstrap > > $(LIBBPF_OUTPUT) $(BPFTOOL_OUTPUT): > $(call msg,MKDIR,$@) > -- > 2.35.2 > > -- Kartikeya
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