From: "Toke Høiland-Jørgensen" <toke@redhat.com>
To: Andrii Nakryiko <andrii.nakryiko@gmail.com>
Cc: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Martin KaFai Lau <kafai@fb.com>, Song Liu <songliubraving@fb.com>,
Yonghong Song <yhs@fb.com>, Andrii Nakryiko <andriin@fb.com>,
Doug Ledford <dledford@redhat.com>,
Jason Gunthorpe <jgg@ziepe.ca>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Jesper Dangaard Brouer <brouer@redhat.com>,
John Fastabend <john.fastabend@gmail.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
Shuah Khan <shuah@kernel.org>,
Networking <netdev@vger.kernel.org>, bpf <bpf@vger.kernel.org>,
open list <linux-kernel@vger.kernel.org>,
linux-rdma@vger.kernel.org,
"open list\:KERNEL SELFTEST FRAMEWORK"
<linux-kselftest@vger.kernel.org>,
clang-built-linux@googlegroups.com
Subject: Re: [PATCH bpf-next v4 09/10] selftests: Remove tools/lib/bpf from include path
Date: Mon, 20 Jan 2020 12:06:44 +0100 [thread overview]
Message-ID: <878sm2pet7.fsf@toke.dk> (raw)
In-Reply-To: <CAEf4Bzb9zUmhxTyYahJqySJzgfyB-zMEd+o4ybv=a8-t+iZS4w@mail.gmail.com>
[...]
> I really-really didn't like this alternating dependency on directory
> or a set of file, depending on current state of those temporary
> directories. Then also this ugly check to avoid circular dependency.
> All that seemed wrong. So I played a bit with how to achieve the same
> differently, and here's what I came up with, which I like a bit
> better. What do you think?
>
> $(BPFOBJ): $(wildcard $(BPFDIR)/*.c $(BPFDIR)/*.h $(BPFDIR)/Makefile) \
> ../../../include/uapi/linux/bpf.h \
> | $(INCLUDE_DIR) $(BUILD_DIR)/libbpf
> $(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) OUTPUT=$(BUILD_DIR)/libbpf/ \
> DESTDIR=$(SCRATCH_DIR) prefix= all install_headers
>
> So, essentially, just make sure that we install local copies of
> headers whenever libbpf.a needs to be re-built.
> ../../../include/uapi/linux/bpf.h ensures we don't miss uapi header
> changes as well. Now anything that uses libbpf headers will need to
> depend on $(BPFOBJ) and will automatically get up-to-date local copies
> of headers.
>
> This seems much simpler. Please give it a try, thanks!
Yes, this is a good idea! It did actually occur to me that the $(BPFOBJ)
rule could just include the install_headers make arg, but only after I
sent out this latest version. Thank you for taking the time to work out
the details, I'll fold this in :)
-Toke
next prev parent reply other threads:[~2020-01-20 11:06 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-17 13:36 [PATCH bpf-next v4 00/10] tools: Use consistent libbpf include paths everywhere Toke Høiland-Jørgensen
2020-01-17 13:36 ` [PATCH bpf-next v4 01/10] samples/bpf: Don't try to remove user's homedir on clean Toke Høiland-Jørgensen
2020-01-17 13:36 ` [PATCH bpf-next v4 02/10] tools/bpf/runqslower: Fix override option for VMLINUX_BTF Toke Høiland-Jørgensen
2020-01-17 21:30 ` Andrii Nakryiko
2020-01-20 11:04 ` Toke Høiland-Jørgensen
2020-01-17 13:36 ` [PATCH bpf-next v4 03/10] selftests: Pass VMLINUX_BTF to runqslower Makefile Toke Høiland-Jørgensen
2020-01-17 21:36 ` Andrii Nakryiko
2020-01-17 13:36 ` [PATCH bpf-next v4 04/10] tools/runqslower: Use consistent include paths for libbpf Toke Høiland-Jørgensen
2020-01-17 21:51 ` Andrii Nakryiko
2020-01-20 12:56 ` Toke Høiland-Jørgensen
2020-01-20 18:35 ` Andrii Nakryiko
2020-01-20 21:00 ` Andrii Nakryiko
2020-01-17 13:36 ` [PATCH bpf-next v4 05/10] selftests: " Toke Høiland-Jørgensen
2020-01-17 13:36 ` [PATCH bpf-next v4 06/10] bpftool: " Toke Høiland-Jørgensen
2020-01-17 13:36 ` [PATCH bpf-next v4 07/10] perf: " Toke Høiland-Jørgensen
2020-01-17 13:36 ` [PATCH bpf-next v4 08/10] samples/bpf: " Toke Høiland-Jørgensen
2020-01-17 13:36 ` [PATCH bpf-next v4 09/10] selftests: Remove tools/lib/bpf from include path Toke Høiland-Jørgensen
2020-01-20 6:20 ` Andrii Nakryiko
2020-01-20 11:06 ` Toke Høiland-Jørgensen [this message]
2020-01-17 13:36 ` [PATCH bpf-next v4 10/10] tools/runqslower: " Toke Høiland-Jørgensen
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