diff options
Diffstat (limited to 'm4/vasnprintf.m4')
| -rw-r--r-- | m4/vasnprintf.m4 | 84 |
1 files changed, 77 insertions, 7 deletions
diff --git a/m4/vasnprintf.m4 b/m4/vasnprintf.m4 index 639b29a..21a85bb 100644 --- a/m4/vasnprintf.m4 +++ b/m4/vasnprintf.m4 @@ -1,5 +1,5 @@ -# vasnprintf.m4 serial 49 -dnl Copyright (C) 2002-2004, 2006-2023 Free Software Foundation, Inc. +# vasnprintf.m4 serial 52 +dnl Copyright (C) 2002-2004, 2006-2024 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. @@ -94,6 +94,7 @@ AC_DEFUN_ONCE([gl_PREREQ_VASNPRINTF], # Prerequisites of lib/vasnwprintf.c. AC_DEFUN_ONCE([gl_PREREQ_VASNWPRINTF], [ + AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles AC_CHECK_FUNCS_ONCE([swprintf wcsnlen mbrtowc]) AC_CHECK_DECLS([_snwprintf], , , [[#include <stdio.h>]]) AC_CHECK_DECLS([wcsnlen], , , [[#include <wchar.h>]]) @@ -107,13 +108,56 @@ AC_DEFUN_ONCE([gl_PREREQ_VASNWPRINTF], esac gl_MBRTOWC_C_LOCALE case "$gl_cv_func_mbrtowc_C_locale_sans_EILSEQ" in - *yes) ;; - *) - AC_DEFINE([NEED_WPRINTF_DIRECTIVE_C], [1], - [Define if the vasnwprintf implementation needs special code for - the 'c' directive.]) + *yes) + AC_CACHE_CHECK([whether swprintf in the C locale is free of encoding errors], + [gl_cv_func_swprintf_C_locale_sans_EILSEQ], + [ + AC_RUN_IFELSE( + [AC_LANG_SOURCE([[ +#ifndef __USE_MINGW_ANSI_STDIO +# define __USE_MINGW_ANSI_STDIO 1 +#endif +#include <stdio.h> +#include <wchar.h> +int main() +{ + int result = 0; + { /* This test fails on glibc 2.35, musl libc 1.2.4, FreeBSD 13.2, NetBSD 9.3, + OpenBSD 7.2, Cygwin 2.9.0. + Reported at <https://www.openwall.com/lists/musl/2023/06/12/2>. */ + wchar_t buf[12]; + int ret = swprintf (buf, 12, L"%c", '\377'); + if (ret < 0) + result |= 1; + } + return result; +}]])], + [gl_cv_func_swprintf_C_locale_sans_EILSEQ=yes], + [gl_cv_func_swprintf_C_locale_sans_EILSEQ=no], + [case "$host_os" in + # Guess no on glibc systems. + *-gnu* | gnu*) gl_cv_func_swprintf_C_locale_sans_EILSEQ="guessing yes";; + # Guess no on musl systems. + *-musl* | midipix*) gl_cv_func_swprintf_C_locale_sans_EILSEQ="guessing no";; + # If we don't know, obey --enable-cross-guesses. + *) gl_cv_func_swprintf_C_locale_sans_EILSEQ="$gl_cross_guess_normal";; + esac + ]) + ]) ;; esac + if case "$gl_cv_func_mbrtowc_C_locale_sans_EILSEQ" in + *yes) false ;; + *) true ;; + esac \ + || case "$gl_cv_func_swprintf_C_locale_sans_EILSEQ" in + *yes) false ;; + *) true ;; + esac; then + AC_DEFINE([NEED_WPRINTF_DIRECTIVE_C], [1], + [Define if the vasnwprintf implementation needs special code for + the 'c' directive.]) + fi gl_SWPRINTF_DIRECTIVE_LA case "$gl_cv_func_swprintf_directive_la" in *yes) ;; @@ -123,6 +167,15 @@ AC_DEFUN_ONCE([gl_PREREQ_VASNWPRINTF], the 'a' directive with 'long double' arguments.]) ;; esac + gl_SWPRINTF_DIRECTIVE_LC + case "$gl_cv_func_swprintf_directive_lc" in + *yes) ;; + *) + AC_DEFINE([NEED_WPRINTF_DIRECTIVE_LC], [1], + [Define if the vasnwprintf implementation needs special code for + the 'lc' directive.]) + ;; + esac gl_MUSL_LIBC gl_PREREQ_VASNXPRINTF ]) @@ -315,6 +368,22 @@ AC_DEFUN([gl_PREREQ_VASNPRINTF_FLAG_ZERO], esac ]) +# Extra prerequisites of lib/vasnprintf.c for supporting the # flag with a +# zero precision and a zero value in the 'x' and 'X' directives. +AC_DEFUN([gl_PREREQ_VASNPRINTF_FLAG_ALT_PRECISION_ZERO], +[ + AC_REQUIRE([gl_PRINTF_FLAG_ALT_PRECISION_ZERO]) + case "$gl_cv_func_printf_flag_alt_precision_zero" in + *yes) + ;; + *) + AC_DEFINE([NEED_PRINTF_FLAG_ALT_PRECISION_ZERO], [1], + [Define if the vasnprintf implementation needs special code for the + # flag with a zero precision and a zero value in the 'x' and 'X' directives.]) + ;; + esac +]) + # Extra prerequisites of lib/vasnprintf.c for supporting large precisions. AC_DEFUN([gl_PREREQ_VASNPRINTF_PRECISION], [ @@ -373,6 +442,7 @@ AC_DEFUN([gl_PREREQ_VASNPRINTF_WITH_POSIX_EXTRAS], gl_PREREQ_VASNPRINTF_FLAG_GROUPING gl_PREREQ_VASNPRINTF_FLAG_LEFTADJUST gl_PREREQ_VASNPRINTF_FLAG_ZERO + gl_PREREQ_VASNPRINTF_FLAG_ALT_PRECISION_ZERO gl_PREREQ_VASNPRINTF_PRECISION gl_PREREQ_VASNPRINTF_ENOMEM ]) |