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| author | Thomas Weißschuh <linux@weissschuh.net> | 2026-04-09 17:55:28 +0200 |
|---|---|---|
| committer | Thomas Weißschuh <linux@weissschuh.net> | 2026-04-27 09:00:50 +0200 |
| commit | 80e5de852e3a619ff83e0347a5766b34fdc8aa78 (patch) | |
| tree | c6b0256b5bece75913c0968d158165e83341473f /tools/include | |
| parent | f94da2b42bc84bbcdb5d1f41551295fc946c7f7e (diff) | |
| download | lwn-80e5de852e3a619ff83e0347a5766b34fdc8aa78.tar.gz lwn-80e5de852e3a619ff83e0347a5766b34fdc8aa78.zip | |
tools/nolibc: add alloca()
Add the wide-used alloca() function. As it is highly machine and
compiler dependent, just defer to the compiler builtin. This has
been available since GCC 4 and clang 3.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://patch.msgid.link/20260409-nolibc-alloca-v1-1-ed02f68dfaf9@weissschuh.net
Diffstat (limited to 'tools/include')
| -rw-r--r-- | tools/include/nolibc/Makefile | 1 | ||||
| -rw-r--r-- | tools/include/nolibc/alloca.h | 15 | ||||
| -rw-r--r-- | tools/include/nolibc/nolibc.h | 1 |
3 files changed, 17 insertions, 0 deletions
diff --git a/tools/include/nolibc/Makefile b/tools/include/nolibc/Makefile index f0e6e71e8335..872c318f50d4 100644 --- a/tools/include/nolibc/Makefile +++ b/tools/include/nolibc/Makefile @@ -20,6 +20,7 @@ OUTPUT ?= $(CURDIR)/ architectures := arm arm64 loongarch m68k mips powerpc riscv s390 sh sparc x86 arch_files := arch.h $(addsuffix .h, $(addprefix arch-, $(architectures))) all_files := \ + alloca.h \ assert.h \ byteswap.h \ compiler.h \ diff --git a/tools/include/nolibc/alloca.h b/tools/include/nolibc/alloca.h new file mode 100644 index 000000000000..448233a79e6e --- /dev/null +++ b/tools/include/nolibc/alloca.h @@ -0,0 +1,15 @@ +/* SPDX-License-Identifier: LGPL-2.1 OR MIT */ +/* + * alloca() for NOLIBC + * Copyright (C) 2026 Thomas Weißschuh <linux@weissschuh.net> + */ + +/* make sure to include all global symbols */ +#include "nolibc.h" + +#ifndef _NOLIBC_ALLOCA_H +#define _NOLIBC_ALLOCA_H + +#define alloca(size) __builtin_alloca(size) + +#endif /* _NOLIBC_ALLOCA_H */ diff --git a/tools/include/nolibc/nolibc.h b/tools/include/nolibc/nolibc.h index 4b99795d7a65..faa94f247281 100644 --- a/tools/include/nolibc/nolibc.h +++ b/tools/include/nolibc/nolibc.h @@ -134,6 +134,7 @@ #include "byteswap.h" #include "endian.h" #include "assert.h" +#include "alloca.h" /* Used by programs to avoid std includes */ #define NOLIBC |