From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 594A43A0E8D; Sun, 18 Oct 2026 13:53:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792331605; cv=none; b=btr4JApIdTwP+GX/39nfsqAINZDNH08smmEsrnFSL7vxVxSIdMAkx//C6ZIvhf4AOgsT6io8XkfDSij7l5Jd21fJfqzrdShebOrp3xT24UKY+xVh00gd44R7xUiX5cBQX7Z3CRqwbvO+XCU8uBsuh8syJwXilhtXCvFZq9Ljtqo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792331605; c=relaxed/simple; bh=KctWqJST7nfxyupAA2J5xHEBT3XdDbjPxcDs9puAyPg=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=GfV8z161MzaokyzZNNUNaaDP7Rx9vLgv/9+98YioGaMCSr7qVqdCwVkKoNFCa0YS94giuvL63VFEiPfHCnWVhXC0RxirklqqUr8RXG6Q3m5ObAExSzyvmyce4oUXNdZFXHsd23Kq+qC3/UuDX974/ldv8Cd4SX1nWcASJ53eC9U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=CnnPaWMu; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="CnnPaWMu" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CE6D31F000C4; Sun, 18 Oct 2026 13:53:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792331604; bh=wqJ7HMhfZ1UXOizQ/gTd6cfSpGI3pyYRZlzk0XOEYZA=; h=From:To:Cc:Subject:Date; b=CnnPaWMuO1rmXx6rsK2ugD18RlhrYCeUIQrNwqgqWC5eRg91r7M/f8FDH6Nsjss5E hGTe6sj9pgnisn3lNx55AQv2ouArzvwn1CU2QH4ftn47KXG9ghhK/YXxJSo+UJqBhv dklvDPpDwgDbnSlUKaUb6c3CRHS3ObExVtGlMql3LdFJNJ8LPoxJGYy8pqNAE0Rf0m sYihkhDikm37SoInyYoxqtMRwAuvIhWaJi3QHg3/sTMIYHTKYT9Rt+rG1f2dPsE9t3 fHNNHw3vqh0pVOQRVcFW52eb3Oo0Di/QEUj8bb2qhriyB8qB+eYOqbf09yt3fd1eqV tJf/zP9+C7DRQ== From: Sasha Levin To: Arnaldo Carvalho de Melo , Namhyung Kim Cc: Peter Zijlstra , Ingo Molnar , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , James Clark , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, Sasha Levin Subject: [PATCH] perf build: Add MINIMAL=1 to build without optional features Date: Sun, 18 Oct 2026 09:53:21 -0400 Message-ID: <20261018135321.3986899-1-sashal@kernel.org> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Turning off every optional feature takes a long list of NO_* variables, and the list has to follow features as they are added and renamed. The one in tests/make for make_minimal has fallen behind: it leaves libtraceevent, jevents, slang, AIO, LZMA, zlib, libLLVM and Rust to be detected, so a make_minimal build still needs libtraceevent and python. Add MINIMAL=1, which turns off every optional feature, the BPF skeletons, and the shellcheck, mypy and pylint runs. perf then builds, natively or cross, with no library beyond the C library and without python, pkg-config, clang or rustc, and the result does not depend on what is installed on the build machine. A MINIMAL=1 build also leaves out the notices that post unwind and python support are disabled, which it asked for, and the one about the pkg-config search path for cross builds, as pkg-config is not needed then. It is handled in Makefile.perf rather than Makefile.config, as Makefile.config is included after the pkg-config, shellcheck, mypy and pylint setup. Use it for make_minimal in tests/make. Suggested-by: Ian Rogers Link: https://lore.kernel.org/r/CAP-5=fWFY-tpJz2vcBZvurwdZY5gwd8cuTemE9q1rtZ0Vi0dng@mail.gmail.com Assisted-by: LLM Signed-off-by: Sasha Levin --- The kbuild series that builds perf with MINIMAL=1 carries the mainline version of this patch: https://lore.kernel.org/r/20261016143143.3613501-1-sashal@kernel.org tools/perf/Makefile.config | 8 ++++++-- tools/perf/Makefile.perf | 42 ++++++++++++++++++++++++++++++++++++-- tools/perf/tests/make | 8 +------- 3 files changed, 47 insertions(+), 11 deletions(-) diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config index b4764f69f47f4..4af7934887539 100644 --- a/tools/perf/Makefile.config +++ b/tools/perf/Makefile.config @@ -753,7 +753,9 @@ dwarf-post-unwind-text := BUG # setup DWARF post unwinder ifdef NO_LIBUNWIND ifdef NO_LIBDW - $(warning Disabling post unwind, no support found.) + ifneq ($(MINIMAL),1) + $(warning Disabling post unwind, no support found.) + endif dwarf-post-unwind := 0 else dwarf-post-unwind-text := libdw @@ -828,7 +830,9 @@ endif PYTHON_EXTENSION_SUFFIX := '.so' ifdef NO_PYTHON_MODULE - $(call disable-python,Python support disabled by user) + ifneq ($(MINIMAL),1) + $(call disable-python,Python support disabled by user) + endif else ifndef PYTHON diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf index 2d9379fea2672..5297fc15a3c9e 100644 --- a/tools/perf/Makefile.perf +++ b/tools/perf/Makefile.perf @@ -129,6 +129,9 @@ include ../scripts/utilities.mak # Define NO_MYPY if you do not want to run mypy during build # # Define NO_PYLINT if you do not want to run pylint during build +# +# Define MINIMAL=1 to build without any optional feature, needing only a C +# compiler and library, flex and bison # As per kernel Makefile, avoid funny character set dependencies unexport LC_ALL @@ -174,6 +177,39 @@ endef LD += $(EXTRA_LDFLAGS) +# MINIMAL=1 is handled here rather than in Makefile.config, which is included +# after the pkg-config, shellcheck, mypy and pylint setup below +ifeq ($(MINIMAL),1) + NO_LIBELF := 1 + NO_LIBDW := 1 + NO_LIBTRACEEVENT := 1 + NO_JEVENTS := 1 + NO_PYTHON_MODULE := 1 + NO_LIBBPF := 1 + BUILD_BPF_SKEL := 0 + NO_SLANG := 1 + NO_DEMANGLE := 1 + NO_BACKTRACE := 1 + NO_AIO := 1 + NO_ZLIB := 1 + NO_LZMA := 1 + NO_LIBZSTD := 1 + NO_LIBNUMA := 1 + NO_LIBLLVM := 1 + NO_CAPSTONE := 1 + NO_LIBPFM4 := 1 + NO_LIBDEBUGINFOD := 1 + NO_BABELTRACE2 := 1 + NO_SDT := 1 + NO_JVMTI := 1 + NO_RUST := 1 + NO_PERF_READ_VDSO32 := 1 + NO_PERF_READ_VDSOX32 := 1 + NO_SHELLCHECK := 1 + NO_MYPY := 1 + NO_PYLINT := 1 +endif + # Some distros provide the command $(CROSS_COMPILE)pkg-config for # searching packges installed with Multiarch. Use it for cross # compilation if it is existed. @@ -195,8 +231,10 @@ else PKG_CONFIG_LIBDIR := $(PKG_CONFIG_LIBDIR):/usr/local/share/pkgconfig/ PKG_CONFIG_LIBDIR := $(PKG_CONFIG_LIBDIR):/usr/share/pkgconfig/ export PKG_CONFIG_LIBDIR - $(warning Missing PKG_CONFIG_LIBDIR, PKG_CONFIG_PATH and PKG_CONFIG_SYSROOT_DIR for cross compilation,) - $(warning set PKG_CONFIG_LIBDIR for using Multiarch libs.) + ifneq ($(MINIMAL),1) + $(warning Missing PKG_CONFIG_LIBDIR, PKG_CONFIG_PATH and PKG_CONFIG_SYSROOT_DIR for cross compilation,) + $(warning set PKG_CONFIG_LIBDIR for using Multiarch libs.) + endif endif endif endif diff --git a/tools/perf/tests/make b/tools/perf/tests/make index 7524de5228029..bef5599b95d6f 100644 --- a/tools/perf/tests/make +++ b/tools/perf/tests/make @@ -119,13 +119,7 @@ make_install_prefix := install prefix=/tmp/krava make_install_prefix_slash := install prefix=/tmp/krava/ make_static := LDFLAGS=-static NO_PERF_READ_VDSO32=1 NO_PERF_READ_VDSOX32=1 NO_JVMTI=1 NO_LIBTRACEEVENT=1 NO_LIBELF=1 -# all the NO_* variable combined -make_minimal := NO_PYTHON_MODULE=1 -make_minimal += NO_DEMANGLE=1 NO_LIBELF=1 NO_BACKTRACE=1 -make_minimal += NO_LIBNUMA=1 NO_LIBBIONIC=1 NO_LIBDW=1 -make_minimal += NO_LIBBPF=1 -make_minimal += NO_SDT=1 NO_JVMTI=1 NO_LIBZSTD=1 -make_minimal += NO_CAPSTONE=1 +make_minimal := MINIMAL=1 # binutils 2_42 and newer have bfd_thread_init() new_libbfd := $(shell echo '#include ' | $(CC) -E -x c - | grep bfd_thread_init) base-commit: 1c90f0a3c8a1c4e38f9edd97af9e20848805a7fb -- 2.53.0