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AFNElJ/c9lw3Zzq9LIGCbsfyKkvBEvckILOJd14sh7ALF3WQnbab70z69MEFyW789WpZq4wx2+DNg2cuwu0cDjE=@vger.kernel.org X-Gm-Message-State: AOJu0YyCwOR+VyRV5vBKlsUvRYvCEz+apfmxUZskZrn8CDBzYp38ZZX/ TkKizdj+enMGcHtNYu2bBheJBMhJLwT83XxJPX3xR+5GV5PbL90tx8gpK3tvfBwjK0oUvGu2Kfd yFWYgeFAgfA== X-Received: from dyt2.prod.google.com ([2002:a05:693c:8082:b0:2f9:af7:503a]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:7301:687:b0:2c5:c532:1fe1 with SMTP id 5a478bee46e88-2ff9362f9d6mr1342788eec.3.1778564153362; Mon, 11 May 2026 22:35:53 -0700 (PDT) Date: Mon, 11 May 2026 22:35:26 -0700 In-Reply-To: <20260512053539.3410189-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260512053539.3410189-1-irogers@google.com> X-Mailer: git-send-email 2.54.0.563.g4f69b47b94-goog Message-ID: <20260512053539.3410189-2-irogers@google.com> Subject: [PATCH v1 01/14] bpftool build: Restrict feature tests during bootstrap compilation From: Ian Rogers To: Quentin Monnet , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Eduard Zingerman , Kumar Kartikeya Dwivedi , Song Liu , Yonghong Song , Jiri Olsa , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Adrian Hunter , James Clark , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Nick Terrell , David Sterba , Nathan Chancellor , Tomas Glozar , Dmitrii Dolgov <9erthalion6@gmail.com>, Costa Shulyupin , Alexandre Chartre , Yuzhuo Jing , Leo Yan , Ankur Arora , Markus Mayer , Collin Funk , Howard Chu , Dapeng Mi , Swapnil Sapkal , Thomas Falcon , Ricky Ringler , linux-kernel@vger.kernel.org, bpf@vger.kernel.org, linux-perf-users@vger.kernel.org Cc: Ian Rogers Content-Type: text/plain; charset="UTF-8" When bpf_skel.mak executes 'make -C ../bpf/bpftool bootstrap', bpftool's Makefile unconditionally evaluated feature checks for llvm, libcap, libbfd, and disassembler libraries because the bootstrap target was not exempted. Since the bootstrap bpftool strictly compiles minimal AST parsing and C code generation logic without linking LLVM or disassembler libraries, these feature check sub-makes are completely redundant. Exempt the bootstrap target from non-essential feature tests to eliminate unneeded sub-make fork overhead during Kbuild startup. Assisted-by: Gemini:gemini-3.1-pro-preview Signed-off-by: Ian Rogers --- tools/bpf/bpftool/Makefile | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/tools/bpf/bpftool/Makefile b/tools/bpf/bpftool/Makefile index 0febf60e1b64..8f50bc163bb2 100644 --- a/tools/bpf/bpftool/Makefile +++ b/tools/bpf/bpftool/Makefile @@ -106,6 +106,10 @@ ifneq ($(SKIP_CRYPTO),1) CRYPTO_LIBS := -lcrypto endif +ifeq ($(MAKECMDGOALS),bootstrap) +FEATURE_TESTS := libelf-zstd +FEATURE_DISPLAY := +else FEATURE_TESTS := clang-bpf-co-re FEATURE_TESTS += llvm FEATURE_TESTS += libcap @@ -122,6 +126,7 @@ FEATURE_DISPLAY += libcap FEATURE_DISPLAY += libbfd FEATURE_DISPLAY += libbfd-liberty FEATURE_DISPLAY += libbfd-liberty-z +endif check_feat := 1 NON_CHECK_FEAT_TARGETS := clean uninstall doc doc-clean doc-install doc-uninstall -- 2.54.0.563.g4f69b47b94-goog