[PATCH 2/8] tools/build: Add bpftool-skeletons feature test

[Tomas Glozar <tglozar@redhat.com>]

Add bpftool-skeletons feature test, testing the presence of a bpftool
capable of generating skeletons.

This is to be used for tools that do not require building their own
bootstrap bpftool from the kernel source tree.

Signed-off-by: Tomas Glozar <tglozar@redhat.com>
---
 tools/build/Makefile.feature   | 3 ++-
 tools/build/feature/Makefile   | 3 +++
 tools/scripts/Makefile.include | 3 +++
 3 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/tools/build/Makefile.feature b/tools/build/Makefile.feature
index 1931b6321314..1f44ca677ad3 100644
--- a/tools/build/Makefile.feature
+++ b/tools/build/Makefile.feature
@@ -135,7 +135,8 @@ FEATURE_TESTS_EXTRA :=                  \
          libbpf-bpf_create_map		\
          libpfm4                        \
          libdebuginfod			\
-         clang-bpf-co-re
+         clang-bpf-co-re		\
+         bpftool-skeletons
 
 
 FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile
index cb1e3e2feedf..4f9c1d950f5d 100644
--- a/tools/build/feature/Makefile
+++ b/tools/build/feature/Makefile
@@ -418,6 +418,9 @@ $(OUTPUT)test-file-handle.bin:
 $(OUTPUT)test-libpfm4.bin:
 	$(BUILD) -lpfm
 
+$(OUTPUT)test-bpftool-skeletons.bin:
+	$(BPFTOOL) version | grep '^features:.*skeletons' \
+		> $(@:.bin=.make.output) 2>&1
 ###############################
 
 clean:
diff --git a/tools/scripts/Makefile.include b/tools/scripts/Makefile.include
index 0aa4005017c7..71bbe52721b3 100644
--- a/tools/scripts/Makefile.include
+++ b/tools/scripts/Makefile.include
@@ -91,6 +91,9 @@ LLVM_CONFIG	?= llvm-config
 LLVM_OBJCOPY	?= llvm-objcopy
 LLVM_STRIP	?= llvm-strip
 
+# Some tools require bpftool
+BPFTOOL		?= bpftool
+
 ifeq ($(CC_NO_CLANG), 1)
 EXTRA_WARNINGS += -Wstrict-aliasing=3
 
-- 
2.48.1