linux-kernel - Re: [PATCH v2 12/16] selftests: vDSO: parse_vdso: Use UAPI headers instead of libc headers

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Message-ID: <af553c62-ca2f-4956-932c-dd6e3a126f58@sirena.org.uk>
Date: Thu, 20 Mar 2025 13:23:40 +0000
From: Mark Brown <broonie@...nel.org>
To: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
Cc: Kees Cook <kees@...nel.org>, Eric Biederman <ebiederm@...ssion.com>,
	Shuah Khan <shuah@...nel.org>,
	Nathan Chancellor <nathan@...nel.org>,
	Nick Desaulniers <ndesaulniers@...gle.com>,
	Bill Wendling <morbo@...gle.com>,
	Justin Stitt <justinstitt@...gle.com>,
	Andy Lutomirski <luto@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Vincenzo Frascino <vincenzo.frascino@....com>,
	Willy Tarreau <w@....eu>,
	Thomas Weißschuh <linux@...ssschuh.net>,
	"Jason A. Donenfeld" <Jason@...c4.com>,
	Christophe Leroy <christophe.leroy@...roup.eu>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
	llvm@...ts.linux.dev
Subject: Re: [PATCH v2 12/16] selftests: vDSO: parse_vdso: Use UAPI headers
 instead of libc headers

On Wed, Feb 26, 2025 at 12:44:51PM +0100, Thomas Weißschuh wrote:
> To allow the usage of parse_vdso.c together with a limited libc like
> nolibc, use the kernels own elf.h and auxvec.h headers.

The vDSO selftests currently fail build for at least arm64 in -next:

  CC       vdso_test_gettimeofday
  CC       vdso_test_getcpu
  CC       vdso_test_abi
  CC       vdso_test_clock_getres
  CC       vdso_test_correctness
  CC       vdso_test_getrandom
  CC       vdso_test_chacha
/build/stage/linux/tools/include/uapi/linux/types.h: Assembler messages:
/build/stage/linux/tools/include/uapi/linux/types.h:9: Error: unknown mnemonic `typedef' -- `typedef __u16 __le16'
/build/stage/linux/tools/include/uapi/linux/types.h:10: Error: unknown mnemonic `typedef' -- `typedef __u16 __be16'
/build/stage/linux/tools/include/uapi/linux/types.h:11: Error: unknown mnemonic `typedef' -- `typedef __u32 __le32'
/build/stage/linux/tools/include/uapi/linux/types.h:12: Error: unknown mnemonic `typedef' -- `typedef __u32 __be32'
/build/stage/linux/tools/include/uapi/linux/types.h:13: Error: unknown mnemonic `typedef' -- `typedef __u64 __le64'
/build/stage/linux/tools/include/uapi/linux/types.h:14: Error: unknown mnemonic `typedef' -- `typedef __u64 __be64'
/build/stage/linux/tools/include/uapi/linux/types.h:16: Error: unknown mnemonic `typedef' -- `typedef __u16 __sum16'
/build/stage/linux/tools/include/uapi/linux/types.h:17: Error: unknown mnemonic `typedef' -- `typedef __u32 __wsum'

a bisect points at this patch, it looks like that's due to the switch to
use TOOLS_INCLUDES but I didn't dig into the specifics.

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