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Fri, 06 Jun 2025 01:11:55 -0700 (PDT) Received: from krava ([173.38.220.52]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-ade1d7542b1sm79027666b.35.2025.06.06.01.11.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Jun 2025 01:11:55 -0700 (PDT) From: Jiri Olsa X-Google-Original-From: Jiri Olsa Date: Fri, 6 Jun 2025 10:11:53 +0200 To: Suleiman Souhlal Cc: Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Eduard Zingerman , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Masahiro Yamada , Ian Rogers , ssouhlal@freebsd.org, bpf@vger.kernel.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, stable@vger.kernel.org Subject: Re: [PATCH v2] tools/resolve_btfids: Fix build when cross compiling kernel with clang. Message-ID: References: <20250606074538.1608546-1-suleiman@google.com> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250606074538.1608546-1-suleiman@google.com> On Fri, Jun 06, 2025 at 04:45:38PM +0900, Suleiman Souhlal wrote: > When cross compiling the kernel with clang, we need to override > CLANG_CROSS_FLAGS when preparing the step libraries. > > Prior to commit d1d096312176 ("tools: fix annoying "mkdir -p ..." logs > when building tools in parallel"), MAKEFLAGS would have been set to a > value that wouldn't set a value for CLANG_CROSS_FLAGS, hiding the > fact that we weren't properly overriding it. > > Cc: stable@vger.kernel.org > Fixes: 56a2df7615fa ("tools/resolve_btfids: Compile resolve_btfids as host program") > Signed-off-by: Suleiman Souhlal lgtm Acked-by: Jiri Olsa thanks, jirka > --- > v2: > - "Signed-off-by:" instead of "Signed-of-by". > > v1: https://lore.kernel.org/lkml/20250606052301.810338-1-suleiman@google.com/ > --- > tools/bpf/resolve_btfids/Makefile | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/tools/bpf/resolve_btfids/Makefile b/tools/bpf/resolve_btfids/Makefile > index afbddea3a39c..ce1b556dfa90 100644 > --- a/tools/bpf/resolve_btfids/Makefile > +++ b/tools/bpf/resolve_btfids/Makefile > @@ -17,7 +17,7 @@ endif > > # Overrides for the prepare step libraries. > HOST_OVERRIDES := AR="$(HOSTAR)" CC="$(HOSTCC)" LD="$(HOSTLD)" ARCH="$(HOSTARCH)" \ > - CROSS_COMPILE="" EXTRA_CFLAGS="$(HOSTCFLAGS)" > + CROSS_COMPILE="" CLANG_CROSS_FLAGS="" EXTRA_CFLAGS="$(HOSTCFLAGS)" > > RM ?= rm > HOSTCC ?= gcc > -- > 2.50.0.rc0.642.g800a2b2222-goog >