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From: Leo Yan <leo.yan@arm.com>
To: hupu <hupu.gm@gmail.com>
Cc: Ian Rogers <irogers@google.com>,
	namhyung@kernel.org, peterz@infradead.org, mingo@redhat.com,
	acme@kernel.org, mark.rutland@arm.com,
	alexander.shishkin@linux.intel.com, jolsa@kernel.org,
	adrian.hunter@intel.com, nathan@kernel.org,
	nick.desaulniers+lkml@gmail.com, morbo@google.com,
	justinstitt@google.com, linux-kernel@vger.kernel.org,
	linux-perf-users@vger.kernel.org
Subject: Re: [RFC] perf build: Allow passing extra Clang flags via EXTRA_CLANG_FLAGS
Date: Wed, 15 Oct 2025 10:30:37 +0100	[thread overview]
Message-ID: <20251015093037.GA109737@e132581.arm.com> (raw)
In-Reply-To: <CADHxFxQg2ZKwLEOa6wic_KP49PRBp=hF=cY16aVmR0O0pa8ZkA@mail.gmail.com>

Hi hupu,

On Tue, Oct 14, 2025 at 10:31:55AM +0800, hupu wrote:

[...]

> > I am not 100% sure, could you execute install kernel headers and then
> > build perf ?
> >
> >   make headers_install
> >
> 
> I am currently building perf for arm64 in an Ubuntu environment using
> a cross toolchain, rather than compiling the entire perf directly with
> Clang. Clang is only invoked during the build process when the BPF
> option is enabled — as shown below where bpf is detected as on:

Have you installed the GCC cross packages ?

 $ sudo apt-get install gcc-aarch64-linux-gnu g++-aarch64-linux-gnu
 $ sudo apt-get install libc6-dev-aarch64-cross linux-libc-dev-aarch64-cross
 $ sudo apt-get install libc6-dev-arm64-cross linux-libc-dev-arm64-cross

My understanding is arm64 cross compilation tries to find headers in the
path /usr/aarch64-linux-gnu/include/ (I confirmed this on Ubuntu/Debian
distros).  After install GCC cross packages, the headers should appear
in the folder.

Thanks,
Leo

  reply	other threads:[~2025-10-15  9:30 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-10-13  8:06 [RFC] perf build: Allow passing extra Clang flags via EXTRA_CLANG_FLAGS hupu
2025-10-13  8:07 ` hupu
2025-10-13 15:46   ` Ian Rogers
2025-10-13 16:14     ` Leo Yan
2025-10-14  2:31       ` hupu
2025-10-15  9:30         ` Leo Yan [this message]
2025-10-15 11:47           ` hupu
2025-10-15 12:55             ` Leo Yan
2025-10-18 10:05             ` hupu
2025-10-19  2:30               ` Namhyung Kim
2025-10-19  7:57                 ` hupu
2025-10-20  1:16                   ` Namhyung Kim
2025-10-20  2:38                     ` hupu
2025-10-20  2:40                       ` [PATCH] perf build: Support passing extra Clang options via EXTRA_BPF_FLAGS hupu
2025-10-20  4:16                         ` Namhyung Kim
2025-10-20  8:00                           ` hupu
2025-10-20  8:02                             ` hupu
2025-10-20 10:15                           ` Leo Yan
2025-10-20 12:51                             ` hupu
2025-10-20 13:02                               ` hupu
2025-10-21  3:11                                 ` hupu
2025-11-18  7:18                                   ` hupu
2025-11-18  7:28                                     ` hupu
2025-11-19  9:43                                       ` hupu
2025-11-20 19:22                                         ` Namhyung Kim
2025-11-21 10:17                                           ` hupu
2025-11-24  7:26                                             ` hupu
2025-11-24  7:34                                               ` hupu
2025-11-25  8:13                                                 ` Namhyung Kim
2025-11-25 12:52                                                   ` hupu
2025-11-25 13:07                                                     ` hupu
2025-11-25 16:10                                                       ` Leo Yan
2025-11-26 13:44                                                         ` hupu
2025-12-05  6:33                                                           ` hupu
2025-12-08  9:05                                                             ` hupu
2025-12-10 10:24                                                               ` hupu
2025-12-11 10:39                                                           ` Leo Yan
2025-12-12  6:12                                                             ` hupu
2025-10-20 13:50                               ` Leo Yan
2025-10-20  2:45                       ` hupu
2025-10-14  1:57     ` [RFC] perf build: Allow passing extra Clang flags via EXTRA_CLANG_FLAGS hupu

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