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Vincent Minet f3b601f900 perf tools: Fix arm64 libjvmti build by generating unistd_64.h 
Since commit 22f72088ff ("tools headers: Update the syscall table with
the kernel sources") the arm64 syscall header is generated at build
time. Later, commit bfb713ea53 ("perf tools: Fix arm64 build by
generating unistd_64.h") added a dependency to libperf to guarantee that
this header was created before building libperf or perf itself.

However, libjvmti also requires this header but does not depend on
libperf, leading to build failures such as:

  In file included from /usr/include/sys/syscall.h:24,
                   from /usr/include/syscall.h:1,
                   from jvmti/jvmti_agent.c:36:
  tools/arch/arm64/include/uapi/asm/unistd.h:2:10: fatal error: asm/unistd_64.h: No such file or directory
      2 | #include <asm/unistd_64.h>

Fix this by ensuring that libperf is built before libjvmti, so that
unistd_64.h is always available.

Fixes: 22f72088ff ("tools headers: Update the syscall table with the kernel sources")
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Vincent Minet <v.minet@criteo.com>
Link: https://lore.kernel.org/r/20250922053702.2688374-1-v.minet@criteo.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
History 2025-10-06 17:16:52 -03:00
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README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.