Files
RedBear-OS/local/recipes/tools/diffutils/source/m4/wcwidth.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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# wcwidth.m4
# serial 38
dnl Copyright (C) 2006-2025 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.
AC_DEFUN([gl_FUNC_WCWIDTH],
[
AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
dnl Persuade glibc <wchar.h> to declare wcwidth().
AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
AC_REQUIRE([gt_TYPE_WINT_T])
AC_CHECK_HEADERS_ONCE([wchar.h])
AC_CHECK_FUNCS_ONCE([wcwidth])
AC_CHECK_DECLS([wcwidth], [], [], [[
#include <wchar.h>
]])
if test $ac_cv_have_decl_wcwidth != yes; then
HAVE_DECL_WCWIDTH=0
fi
if test $ac_cv_func_wcwidth != yes; then
AC_CACHE_CHECK([whether wcwidth is a macro],
[gl_cv_func_wcwidth_macro],
[AC_EGREP_CPP([wchar_header_defines_wcwidth], [
#include <wchar.h>
#ifdef wcwidth
wchar_header_defines_wcwidth
#endif],
[gl_cv_func_wcwidth_macro=yes],
[gl_cv_func_wcwidth_macro=no])
])
fi
if test $ac_cv_func_wcwidth = yes || test $gl_cv_func_wcwidth_macro = yes; then
HAVE_WCWIDTH=1
dnl On Mac OS X 10.3, wcwidth(0x0301) (COMBINING ACUTE ACCENT) returns 1.
dnl On macOS 12.5, NetBSD 9.3, OpenBSD 5.0, MidnightBSD 1.1,
dnl wcwidth(0x05B0) (HEBREW POINT SHEVA) returns 1.
dnl On macOS 12.5, NetBSD 9.3, MidnightBSD 1.1, OSF/1 5.1,
dnl wcwidth(0x200B) (ZERO WIDTH SPACE) returns 1.
dnl On OpenBSD 5.8, wcwidth(0xFF1A) (FULLWIDTH COLON) returns 0.
dnl This leads to bugs in 'ls' (coreutils).
dnl On Solaris 11.4, wcwidth(0x2202) (PARTIAL DIFFERENTIAL) returns 2,
dnl even in Western locales.
AC_CACHE_CHECK([whether wcwidth works reasonably in UTF-8 locales],
[gl_cv_func_wcwidth_works],
[
AC_RUN_IFELSE(
[AC_LANG_SOURCE([[
#include <locale.h>
#include <wchar.h>
#if !HAVE_DECL_WCWIDTH
extern
# ifdef __cplusplus
"C"
# endif
int wcwidth (int);
#endif
int main ()
{
int result = 0;
if (setlocale (LC_ALL, "en_US.UTF-8") != NULL)
{
if (wcwidth (0x0301) > 0)
result |= 1;
if (wcwidth (0x05B0) > 0)
result |= 2;
if (wcwidth (0x200B) > 0)
result |= 4;
if (wcwidth (0xFF1A) == 0)
result |= 8;
if (wcwidth (0x2202) > 1)
result |= 16;
}
return result;
}]])],
[gl_cv_func_wcwidth_works=yes],
[gl_cv_func_wcwidth_works=no],
[
changequote(,)dnl
case "$host_os" in
# Guess yes on glibc systems.
*-gnu* | gnu*) gl_cv_func_wcwidth_works="guessing yes";;
# Guess yes on musl systems.
*-musl* | midipix*) gl_cv_func_wcwidth_works="guessing yes";;
# Guess yes on AIX 7 systems.
aix[7-9]*) gl_cv_func_wcwidth_works="guessing yes";;
*) gl_cv_func_wcwidth_works="$gl_cross_guess_normal";;
esac
changequote([,])dnl
])
])
case "$gl_cv_func_wcwidth_works" in
*yes) ;;
*no) REPLACE_WCWIDTH=1 ;;
esac
else
HAVE_WCWIDTH=0
fi
dnl We don't substitute HAVE_WCWIDTH. We assume that if the system does not
dnl have the wcwidth function, then it does not declare it.
])
# Prerequisites of lib/wcwidth.c.
AC_DEFUN([gl_PREREQ_WCWIDTH], [
AC_REQUIRE([AC_C_INLINE])
:
])