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

From: Thomas Weißschuh
Date: Sun Jul 28 2024 - 06:10:45 EST


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@xxxxxxxxxxxxxx>
---
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@xxxxxxxxxxxxxx>