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From: Emiliano Ingrassia <ingrassia@epigenesys.com>
To: "linux-perf-users@vger.kernel.org"
	<linux-perf-users@vger.kernel.org>,
	Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: lkml <linux-kernel@vger.kernel.org>,
	Arnd Bergmann <arnd@arndb.de>, Jiri Olsa <jolsa@kernel.org>,
	Namhyung Kim <namhyung@kernel.org>
Subject: perf tools build broken for RISCV 32 bit
Date: Thu, 14 Jan 2021 19:38:01 +0100	[thread overview]
Message-ID: <YACPie55ArIHu3mI@ingrassia.epigenesys.com> (raw)

Hi,

When building perf for RISCV 32 bit (v5.10.7) I got the following

| In file included from bench/futex-hash.c:29:
| bench/futex.h: In function ‘futex_wait’:
| bench/futex.h:37:10: error: ‘SYS_futex’ undeclared (first use in this function); did you mean ‘SYS_tee’?

This issue is similar to the one reported in https://lkml.org/lkml/2019/4/19/631

I found that patching tools/arch/riscv/include/uapi/asm/unistd.h as following:

 #ifdef __LP64__
 #define __ARCH_WANT_NEW_STAT
 #define __ARCH_WANT_SET_GET_RLIMIT
+#else
+#define __ARCH_WANT_TIME32_SYSCALLS
 #endif /* __LP64__ */

solved the problem.

I also found that a similar patch for arch/riscv/include/uapi/asm/unistd.h
was removed in commit d4c08b9776b3, so probably this is not the right way(?).

Thank you, best regards.

             reply	other threads:[~2021-01-14 18:38 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-14 18:38 Emiliano Ingrassia [this message]
2021-01-14 19:16 ` Arnd Bergmann
2021-01-15 11:13   ` Emiliano Ingrassia

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