Files
RedBear-OS/local/recipes/tools/diffutils/source/m4/readlinkat.m4
T
vasilito 068a1ca63e bootloader: rebase onto upstream 1.0.0, sync firmware-loader version
Bootloader fork rebase:
- Base changed from 0.1.0 pre-patched archive to upstream 1.0.0 tag (c7eeb9f)
- Applied 0001-redbear-local-forks.patch (Cargo.toml crate path redirects)
- Applied fix-uefi-alloc-panic.patch equivalents (4 panic!() -> graceful
  error handling in src/main.rs)
- Applied P5-live-preload-cap-1gib.patch (1 GiB cap on live image preload)
- Skipped: P0 GPT partition scan (requires new module + integration),
  P1 timeout/default-resolution, P2 live preload guard (subsumed by
  panic fixes + cap), P3 live image safe read, P4 large ISO boot,
  redox.patch — to be applied in dedicated rebase session.

firmware-loader/Cargo.toml: version 0.1.0 -> 0.3.0 (sync with other
Red Bear custom crates which are at 0.3.0).

fork-upstream-map.toml: bootloader back from PENDING_REBASE to 1.0.0
since the partial rebase matches upstream 1.0.0 content.

fork-upstream-map.toml: base restored to 'main' tracked (was correctly
tracked by build-redbear.sh).
2026-07-11 09:47:59 +03:00

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# readlinkat.m4
# serial 10
dnl Copyright (C) 2009-2025 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
dnl This file is offered as-is, without any warranty.
# See if we need to provide readlinkat replacement.
# Written by Eric Blake.
AC_DEFUN([gl_FUNC_READLINKAT],
[
AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
gl_CHECK_FUNCS_ANDROID([readlinkat], [[#include <unistd.h>]])
AC_REQUIRE([gl_FUNC_READLINK])
if test $ac_cv_func_readlinkat = no; then
HAVE_READLINKAT=0
case "$gl_cv_onwards_func_readlinkat" in
future*) REPLACE_READLINKAT=1 ;;
esac
else
AC_CACHE_CHECK([whether readlinkat signature is correct],
[gl_cv_decl_readlinkat_works],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[#include <unistd.h>
/* Check whether original declaration has correct type. */
ssize_t readlinkat (int, char const *, char *, size_t);
]])
],
[gl_cv_decl_readlinkat_works=yes],
[gl_cv_decl_readlinkat_works=no])
])
# Assume readlinkat has the same bugs as readlink,
# as is the case on macOS 14 with trailing slashes.
case $gl_cv_decl_readlinkat_works,$gl_cv_func_readlink_trailing_slash,$gl_cv_func_readlink_truncate in
*yes,*yes,*yes)
;;
*)
REPLACE_READLINKAT=1
;;
esac
dnl On Cygwin 3.3.6, readlinkat(AT_FDCWD,"/dev/null") returns
dnl "\\Device\\Null", which is unusable.
case "$host_os" in
cygwin*)
REPLACE_READLINKAT=1
;;
esac
fi
])