Merge tag 'nolibc-20250724-for-6.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/nolibc/linux-nolibc

Pull nolibc updates from Thomas Weißschuh:
 "Highlights:
   - New supported architectures: SuperH, x32, MIPS n32/n64
   - Adopt general kernel architectures names
   - Integrate the nolibc selftests into the kselftests framework
   - Various fixes and new syscall wrappers

  Two non-nolibc changes:
   - New arm64 selftest which depends on nolibc changes
   - General tools/ cross-compilation bugfix for s390 clang"

* tag 'nolibc-20250724-for-6.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/nolibc/linux-nolibc: (30 commits)
  selftests/nolibc: add x32 test configuration
  tools/nolibc: define time_t in terms of __kernel_old_time_t
  selftests/nolibc: show failed run if test process crashes
  tools/nolibc: drop s390 clang target override
  tools/build: Fix s390(x) cross-compilation with clang
  tools/nolibc: avoid false-positive -Wmaybe-uninitialized through waitpid()
  selftests/nolibc: correctly report errors from printf() and friends
  selftests/nolibc: create /dev/full when running as PID 1
  tools/nolibc: add support for clock_nanosleep() and nanosleep()
  kselftest/arm64: Add a test for vfork() with GCS
  selftests/nolibc: Add coverage of vfork()
  tools/nolibc: Provide vfork()
  tools/nolibc: Replace ifdef with if defined() in sys.h
  tools/nolibc: add support for SuperH
  selftests/nolibc: use file driver for QEMU serial
  selftests/nolibc: fix EXTRACONFIG variables ordering
  tools/nolibc: MIPS: add support for N64 and N32 ABIs
  tools/nolibc: MIPS: drop noreorder option
  tools/nolibc: MIPS: drop manual stack pointer alignment
  tools/nolibc: MIPS: drop $gp setup
  ...

Author: torvalds

tools/include/nolibc/Makefile

@@ -23,8 +23,7 @@ else
 Q=@
 endif
 
-nolibc_arch := $(patsubst arm64,aarch64,$(ARCH))
-arch_file := arch-$(nolibc_arch).h
+arch_file := arch-$(ARCH).h
 all_files := \
 		compiler.h \
 		crt.h \
@@ -91,18 +90,12 @@ help:
 	@echo "  OUTPUT  = $(OUTPUT)"
 	@echo ""
 
-# Note: when ARCH is "x86" we concatenate both x86_64 and i386
 headers:
 	$(Q)mkdir -p $(OUTPUT)sysroot
 	$(Q)mkdir -p $(OUTPUT)sysroot/include
 	$(Q)cp --parents $(all_files) $(OUTPUT)sysroot/include/
-	$(Q)if [ "$(ARCH)" = "x86" ]; then      \
-		sed -e                          \
-		  's,^#ifndef _NOLIBC_ARCH_X86_64_H,#if !defined(_NOLIBC_ARCH_X86_64_H) \&\& defined(__x86_64__),' \
-		  arch-x86_64.h;                \
-		sed -e                          \
-		  's,^#ifndef _NOLIBC_ARCH_I386_H,#if !defined(_NOLIBC_ARCH_I386_H) \&\& !defined(__x86_64__),' \
-		  arch-i386.h;                  \
+	$(Q)if [ "$(ARCH)" = "i386" -o "$(ARCH)" = "x86_64" ]; then \
+		cat arch-x86.h;                 \
 	elif [ -e "$(arch_file)" ]; then        \
 		cat $(arch_file);               \
 	else                                    \
@@ -114,11 +107,8 @@ headers_standalone: headers
 	$(Q)$(MAKE) -C $(srctree) headers
 	$(Q)$(MAKE) -C $(srctree) headers_install INSTALL_HDR_PATH=$(OUTPUT)sysroot
 
-# GCC uses "s390", clang "systemz"
-CLANG_CROSS_FLAGS := $(subst --target=s390-linux,--target=systemz-linux,$(CLANG_CROSS_FLAGS))
-
 headers_check: headers_standalone
-	for header in $(filter-out crt.h std.h,$(all_files)); do \
+	$(Q)for header in $(filter-out crt.h std.h,$(all_files)); do \
 		$(CC) $(CLANG_CROSS_FLAGS) -Wall -Werror -nostdinc -fsyntax-only -x c /dev/null \
 			-I$(or $(objtree),$(srctree))/usr/include -include $$header -include $$header || exit 1; \
 	done

tools/include/nolibc/arch-aarch64.h renamed to tools/include/nolibc/arch-arm64.h

@@ -1,16 +1,16 @@
 /* SPDX-License-Identifier: LGPL-2.1 OR MIT */
 /*
- * AARCH64 specific definitions for NOLIBC
+ * ARM64 specific definitions for NOLIBC
  * Copyright (C) 2017-2022 Willy Tarreau <[email protected]>
  */
 
-#ifndef _NOLIBC_ARCH_AARCH64_H
-#define _NOLIBC_ARCH_AARCH64_H
+#ifndef _NOLIBC_ARCH_ARM64_H
+#define _NOLIBC_ARCH_ARM64_H
 
 #include "compiler.h"
 #include "crt.h"
 
-/* Syscalls for AARCH64 :
+/* Syscalls for ARM64 :
  *   - registers are 64-bit
  *   - stack is 16-byte aligned
  *   - syscall number is passed in x8
@@ -150,4 +150,4 @@ void __attribute__((weak, noreturn)) __nolibc_entrypoint __no_stack_protector _s
 	);
 	__nolibc_entrypoint_epilogue();
 }
-#endif /* _NOLIBC_ARCH_AARCH64_H */
+#endif /* _NOLIBC_ARCH_ARM64_H */