From: Quentin Monnet <quentin@isovalent.com>
To: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>
Cc: netdev@vger.kernel.org, bpf@vger.kernel.org,
Quentin Monnet <quentin@isovalent.com>
Subject: [PATCH bpf-next 5/9] bpf: preload: install libbpf headers when building
Date: Thu, 30 Sep 2021 12:33:02 +0100 [thread overview]
Message-ID: <20210930113306.14950-6-quentin@isovalent.com> (raw)
In-Reply-To: <20210930113306.14950-1-quentin@isovalent.com>
API headers from libbpf should not be accessed directly from the
library's source directory. Instead, they should be exported with "make
install_headers". Let's make sure that bpf/preload/Makefile installs the
headers properly when building.
Signed-off-by: Quentin Monnet <quentin@isovalent.com>
---
kernel/bpf/preload/Makefile | 19 ++++++++++++++-----
1 file changed, 14 insertions(+), 5 deletions(-)
diff --git a/kernel/bpf/preload/Makefile b/kernel/bpf/preload/Makefile
index 1951332dd15f..b04d8e61e5ad 100644
--- a/kernel/bpf/preload/Makefile
+++ b/kernel/bpf/preload/Makefile
@@ -1,21 +1,30 @@
# SPDX-License-Identifier: GPL-2.0
LIBBPF_SRCS = $(srctree)/tools/lib/bpf/
-LIBBPF_A = $(obj)/libbpf.a
-LIBBPF_OUT = $(abspath $(obj))
+LIBBPF_A = $(obj)/libbpf/libbpf.a
+LIBBPF_OUT = $(abspath $(obj))/libbpf
+LIBBPF_DESTDIR = $(LIBBPF_OUT)
+LIBBPF_INCLUDE = $(LIBBPF_DESTDIR)/include
# Although not in use by libbpf's Makefile, set $(O) so that the "dummy" test
# in tools/scripts/Makefile.include always succeeds when building the kernel
# with $(O) pointing to a relative path, as in "make O=build bindeb-pkg".
-$(LIBBPF_A):
- $(Q)$(MAKE) -C $(LIBBPF_SRCS) O=$(LIBBPF_OUT)/ OUTPUT=$(LIBBPF_OUT)/ $(LIBBPF_OUT)/libbpf.a
+$(LIBBPF_A): | $(LIBBPF_OUT) $(LIBBPF_INCLUDE)
+ $(Q)$(MAKE) -C $(LIBBPF_SRCS) O=$(LIBBPF_OUT)/ OUTPUT=$(LIBBPF_OUT)/ \
+ DESTDIR=$(LIBBPF_DESTDIR) prefix= \
+ $(LIBBPF_OUT)/libbpf.a install_headers
+
+$(LIBBPF_OUT) $(LIBBPF_INCLUDE):
+ $(call msg,MKDIR,$@)
+ $(Q)mkdir -p $@
userccflags += -I $(srctree)/tools/include/ -I $(srctree)/tools/include/uapi \
- -I $(srctree)/tools/lib/ -Wno-unused-result
+ -I $(LIBBPF_INCLUDE) -Wno-unused-result
userprogs := bpf_preload_umd
clean-files := $(userprogs) bpf_helper_defs.h FEATURE-DUMP.libbpf staticobjs/ feature/
+clean-files += $(LIBBPF_OUT) $(LIBBPF_DESTDIR)
bpf_preload_umd-objs := iterators/iterators.o
bpf_preload_umd-userldlibs := $(LIBBPF_A) -lelf -lz
--
2.30.2
next prev parent reply other threads:[~2021-09-30 11:34 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-30 11:32 [PATCH bpf-next 0/9] install libbpf headers when using the library Quentin Monnet
2021-09-30 11:32 ` [PATCH bpf-next 1/9] tools: bpftool: remove unused includes to <bpf/bpf_gen_internal.h> Quentin Monnet
2021-09-30 11:32 ` [PATCH bpf-next 2/9] tools: bpftool: install libbpf headers instead of including the dir Quentin Monnet
2021-09-30 11:33 ` [PATCH bpf-next 3/9] tools: resolve_btfids: install libbpf headers when building Quentin Monnet
2021-09-30 11:33 ` [PATCH bpf-next 4/9] tools: runqslower: " Quentin Monnet
2021-09-30 11:33 ` Quentin Monnet [this message]
2021-09-30 11:33 ` [PATCH bpf-next 6/9] bpf: iterators: " Quentin Monnet
2021-09-30 12:17 ` Quentin Monnet
2021-10-01 11:06 ` Quentin Monnet
2021-10-01 22:43 ` Andrii Nakryiko
2021-09-30 11:33 ` [PATCH bpf-next 7/9] samples/bpf: " Quentin Monnet
2021-09-30 11:33 ` [PATCH bpf-next 8/9] samples/bpf: update .gitignore Quentin Monnet
2021-09-30 11:33 ` [PATCH bpf-next 9/9] selftests/bpf: better clean up for runqslower in test_bpftool_build.sh Quentin Monnet
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