linux-kernel - [PATCH 00/12] tools/nolibc: improve LLVM/clang support

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Message-Id: <20240728-nolibc-llvm-v1-0-bc384269bc35@weissschuh.net>
Date: Sun, 28 Jul 2024 12:09:54 +0200
From: Thomas Weißschuh <linux@...ssschuh.net>
To: Willy Tarreau <w@....eu>, Shuah Khan <shuah@...nel.org>
Cc: linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org, 
 Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH 00/12] tools/nolibc: improve LLVM/clang support

The current support for LLVM and clang in nolibc and its testsuite is
very limited.

* Various architectures plain do not compile
* The user *has* to specify "-Os" otherwise the program crashes
* Cross-compilation of the tests does not work
* Using clang is not wired up in run-tests.sh

This series extends this support.

Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
---
Thomas Weißschuh (12):
      tools/nolibc: use clang-compatible asm syntax in arch-arm.h
      tools/nolibc: limit powerpc stack-protector workaround to GCC
      tools/nolibc: move entrypoint specifics to compiler.h
      tools/nolibc: use attribute((naked)) if available
      selftests/nolibc: report failure if no testcase passed
      selftests/nolibc: avoid passing NULL to printf("%s")
      selftests/nolibc: determine $(srctree) first
      selftests/nolibc: setup objtree without Makefile.include
      selftests/nolibc: add support for LLVM= parameter
      selftests/nolibc: add cc-option compatible with clang cross builds
      selftests/nolibc: run-tests.sh: avoid overwriting CFLAGS_EXTRA
      selftests/nolibc: run-tests.sh: allow building through LLVM

 tools/include/nolibc/arch-aarch64.h          |  4 ++--
 tools/include/nolibc/arch-arm.h              |  8 ++++----
 tools/include/nolibc/arch-i386.h             |  4 ++--
 tools/include/nolibc/arch-loongarch.h        |  4 ++--
 tools/include/nolibc/arch-mips.h             |  4 ++--
 tools/include/nolibc/arch-powerpc.h          |  6 +++---
 tools/include/nolibc/arch-riscv.h            |  4 ++--
 tools/include/nolibc/arch-s390.h             |  4 ++--
 tools/include/nolibc/arch-x86_64.h           |  4 ++--
 tools/include/nolibc/compiler.h              | 12 ++++++++++++
 tools/testing/selftests/nolibc/Makefile      | 27 ++++++++++++++++-----------
 tools/testing/selftests/nolibc/nolibc-test.c |  4 ++--
 tools/testing/selftests/nolibc/run-tests.sh  | 20 ++++++++++++++++----
 13 files changed, 67 insertions(+), 38 deletions(-)
---
base-commit: 0db287736bc586fcd5a2925518ef09eec6924803
change-id: 20240727-nolibc-llvm-3fad68590d4c

Best regards,
-- 
Thomas Weißschuh <linux@...ssschuh.net>