netdev - Re: [PATCH bpf-next v6] tools/bpf: generate pkg-config file for libbpf

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Message-ID: <20190321224314.m6tq4b55t6mjh2se@ast-mbp.dhcp.thefacebook.com>
Date:   Thu, 21 Mar 2019 15:43:15 -0700
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     luca.boccassi@...il.com
Cc:     netdev@...r.kernel.org, daniel@...earbox.net
Subject: Re: [PATCH bpf-next v6] tools/bpf: generate pkg-config file for
 libbpf

On Thu, Mar 21, 2019 at 10:33:17PM +0000, luca.boccassi@...il.com wrote:
> From: Luca Boccassi <bluca@...ian.org>
> 
> Generate a libbpf.pc file at build time so that users can rely
> on pkg-config to find the library, its CFLAGS and LDFLAGS.
> 
> Signed-off-by: Luca Boccassi <bluca@...ian.org>
> Acked-by: Andrey Ignatov <rdna@...com>
> ---
> v2: use QUIET_GEN instead of QUIET_LINK to generate pc file,
>     save kernel version in its own variable instead of calling
>     make inline
> v3: use LIBBPF_VERSION instead of kernel_version
> v4: use -I${prefix}/include rather than -I${prefix}/include/bpf
>     in the Cflags field as requested, to keep consistency with
>     how the headers are used now and to avoid a dependency from
>     the pc file to the headers installation
> v5: add acked-by, add SPDX line to pc file
> v6: remove URL field, generalize Description field

It fails to build:
make -C ../../../lib/bpf OUTPUT=/data/users/ast/bpf-next/tools/testing/selftests/bpf/
make[1]: Entering directory `/data/users/ast/bpf-next/tools/lib/bpf'
make[2]: *** No rule to make target `libbpf.pc', needed by `all_cmd'.  Stop.
make[1]: *** [all] Error 2
make[1]: Leaving directory `/data/users/ast/bpf-next/tools/lib/bpf'