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authorQuentin Monnet <quentin@isovalent.com>2021-10-07 21:44:30 +0200
committerAndrii Nakryiko <andrii@kernel.org>2021-10-08 20:54:11 +0200
commit1478994aad82810d833bf9c816fb4e9845553e9b (patch)
treea3ae2e66d95184fdff5f3ea0c3a939079a896eee /tools/bpf
parentbpftool: Install libbpf headers instead of including the dir (diff)
downloadlinux-1478994aad82810d833bf9c816fb4e9845553e9b.tar.xz
linux-1478994aad82810d833bf9c816fb4e9845553e9b.zip
tools/resolve_btfids: Install libbpf headers when building
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 resolve_btfids installs the headers properly when building. When descending from a parent Makefile, the specific output directories for building the library and exporting the headers are configurable with LIBBPF_OUT and LIBBPF_DESTDIR, respectively. This is in addition to OUTPUT, on top of which those variables are constructed by default. Also adjust the Makefile for the BPF selftests in order to point to the (target) libbpf shared with other tools, instead of building a version specific to resolve_btfids. Remove libbpf's order-only dependencies on the include directories (they are created by libbpf and don't need to exist beforehand). Signed-off-by: Quentin Monnet <quentin@isovalent.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20211007194438.34443-5-quentin@isovalent.com
Diffstat (limited to 'tools/bpf')
-rw-r--r--tools/bpf/resolve_btfids/Makefile16
-rw-r--r--tools/bpf/resolve_btfids/main.c4
2 files changed, 13 insertions, 7 deletions
diff --git a/tools/bpf/resolve_btfids/Makefile b/tools/bpf/resolve_btfids/Makefile
index 08b75e314ae7..751643f860b2 100644
--- a/tools/bpf/resolve_btfids/Makefile
+++ b/tools/bpf/resolve_btfids/Makefile
@@ -29,25 +29,30 @@ BPFOBJ := $(OUTPUT)/libbpf/libbpf.a
LIBBPF_OUT := $(abspath $(dir $(BPFOBJ)))/
SUBCMDOBJ := $(OUTPUT)/libsubcmd/libsubcmd.a
+LIBBPF_DESTDIR := $(LIBBPF_OUT)
+LIBBPF_INCLUDE := $(LIBBPF_DESTDIR)include
+
BINARY := $(OUTPUT)/resolve_btfids
BINARY_IN := $(BINARY)-in.o
all: $(BINARY)
-$(OUTPUT) $(OUTPUT)/libbpf $(OUTPUT)/libsubcmd:
+$(OUTPUT) $(OUTPUT)/libsubcmd $(LIBBPF_OUT):
$(call msg,MKDIR,,$@)
$(Q)mkdir -p $(@)
$(SUBCMDOBJ): fixdep FORCE | $(OUTPUT)/libsubcmd
$(Q)$(MAKE) -C $(SUBCMD_SRC) OUTPUT=$(abspath $(dir $@))/ $(abspath $@)
-$(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(OUTPUT)/libbpf
- $(Q)$(MAKE) $(submake_extras) -C $(LIBBPF_SRC) OUTPUT=$(LIBBPF_OUT) $(abspath $@)
+$(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(LIBBPF_OUT)
+ $(Q)$(MAKE) $(submake_extras) -C $(LIBBPF_SRC) OUTPUT=$(LIBBPF_OUT) \
+ DESTDIR=$(LIBBPF_DESTDIR) prefix= \
+ $(abspath $@) install_headers
CFLAGS := -g \
-I$(srctree)/tools/include \
-I$(srctree)/tools/include/uapi \
- -I$(LIBBPF_SRC) \
+ -I$(LIBBPF_INCLUDE) \
-I$(SUBCMD_SRC)
LIBS = -lelf -lz
@@ -65,7 +70,8 @@ $(BINARY): $(BPFOBJ) $(SUBCMDOBJ) $(BINARY_IN)
clean_objects := $(wildcard $(OUTPUT)/*.o \
$(OUTPUT)/.*.o.cmd \
$(OUTPUT)/.*.o.d \
- $(OUTPUT)/libbpf \
+ $(LIBBPF_OUT) \
+ $(LIBBPF_DESTDIR) \
$(OUTPUT)/libsubcmd \
$(OUTPUT)/resolve_btfids)
diff --git a/tools/bpf/resolve_btfids/main.c b/tools/bpf/resolve_btfids/main.c
index c6c3e613858a..716e6ad1864b 100644
--- a/tools/bpf/resolve_btfids/main.c
+++ b/tools/bpf/resolve_btfids/main.c
@@ -60,8 +60,8 @@
#include <linux/rbtree.h>
#include <linux/zalloc.h>
#include <linux/err.h>
-#include <btf.h>
-#include <libbpf.h>
+#include <bpf/btf.h>
+#include <bpf/libbpf.h>
#include <parse-options.h>
#define BTF_IDS_SECTION ".BTF_ids"