diff options
Diffstat (limited to 'm4/wcrtomb.m4')
| -rw-r--r-- | m4/wcrtomb.m4 | 76 |
1 files changed, 64 insertions, 12 deletions
diff --git a/m4/wcrtomb.m4 b/m4/wcrtomb.m4 index e71c57a..c45fd98 100644 --- a/m4/wcrtomb.m4 +++ b/m4/wcrtomb.m4 @@ -1,5 +1,5 @@ -# wcrtomb.m4 serial 13 -dnl Copyright (C) 2008-2018 Free Software Foundation, Inc. +# wcrtomb.m4 serial 16 +dnl Copyright (C) 2008-2020 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. @@ -31,9 +31,13 @@ AC_DEFUN([gl_FUNC_WCRTOMB], REPLACE_WCRTOMB=1 fi else - if test $REPLACE_MBSTATE_T = 1; then - REPLACE_WCRTOMB=1 - else + dnl We don't actually need to override wcrtomb when redefining the semantics + dnl of the mbstate_t type. Tested on 32-bit AIX. + dnl if test $REPLACE_MBSTATE_T = 1; then + dnl REPLACE_WCRTOMB=1 + dnl fi + if test $REPLACE_WCRTOMB = 0; then + dnl On Android 4.3, wcrtomb produces wrong characters in the C locale. dnl On AIX 4.3, OSF/1 5.1 and Solaris <= 11.3, wcrtomb (NULL, 0, NULL) dnl sometimes returns 0 instead of 1. AC_REQUIRE([AC_PROG_CC]) @@ -42,6 +46,47 @@ AC_DEFUN([gl_FUNC_WCRTOMB], AC_REQUIRE([gt_LOCALE_JA]) AC_REQUIRE([gt_LOCALE_ZH_CN]) AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles + AC_CACHE_CHECK([whether wcrtomb works in the C locale], + [gl_cv_func_wcrtomb_works], + [AC_RUN_IFELSE( + [AC_LANG_SOURCE([[ +#include <string.h> +#include <stdlib.h> +/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before + <wchar.h>. + BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be + included before <wchar.h>. */ +#include <stddef.h> +#include <stdio.h> +#include <wchar.h> +int main () +{ + mbstate_t state; + char out[64]; + int count; + memset (&state, 0, sizeof (state)); + out[0] = 'x'; + count = wcrtomb (out, L'a', &state); + return !(count == 1 && out[0] == 'a'); +}]])], + [gl_cv_func_wcrtomb_works=yes], + [gl_cv_func_wcrtomb_works=no], + [case "$host_os" in + # Guess no on Android. + linux*-android*) gl_cv_func_wcrtomb_works="guessing no";; + # Guess yes otherwise. + *) gl_cv_func_wcrtomb_works="guessing yes";; + esac + ]) + ]) + case "$gl_cv_func_wcrtomb_works" in + *yes) ;; + *) AC_DEFINE([WCRTOMB_C_LOCALE_BUG], [1], + [Define if the wcrtomb function does not work in the C locale.]) + REPLACE_WCRTOMB=1 ;; + esac + fi + if test $REPLACE_WCRTOMB = 0; then AC_CACHE_CHECK([whether wcrtomb return value is correct], [gl_cv_func_wcrtomb_retval], [ @@ -49,12 +94,10 @@ AC_DEFUN([gl_FUNC_WCRTOMB], dnl is present. changequote(,)dnl case "$host_os" in - # Guess no on AIX 4, OSF/1 and Solaris. - aix4* | osf* | solaris*) gl_cv_func_wcrtomb_retval="guessing no" ;; - # Guess yes on native Windows. - mingw*) gl_cv_func_wcrtomb_retval="guessing yes" ;; - # Guess yes otherwise. - *) gl_cv_func_wcrtomb_retval="guessing yes" ;; + # Guess no on AIX 4, OSF/1, Solaris, native Windows. + aix4* | osf* | solaris* | mingw*) gl_cv_func_wcrtomb_retval="guessing no" ;; + # Guess yes otherwise. + *) gl_cv_func_wcrtomb_retval="guessing yes" ;; esac changequote([,])dnl if test $LOCALE_FR != none || test $LOCALE_FR_UTF8 != none || test $LOCALE_JA != none || test $LOCALE_ZH_CN != none; then @@ -70,6 +113,7 @@ changequote([,])dnl #include <stdio.h> #include <time.h> #include <wchar.h> +#include <stdlib.h> int main () { int result = 0; @@ -82,6 +126,12 @@ int main () { if (wcrtomb (NULL, 0, NULL) != 1) result |= 2; + { + wchar_t wc = (wchar_t) 0xBADFACE; + if (mbtowc (&wc, "\303\274", 2) == 2) + if (wcrtomb (NULL, wc, NULL) != 1) + result |= 2; + } } if (setlocale (LC_ALL, "$LOCALE_JA") != NULL) { @@ -102,7 +152,9 @@ int main () ]) case "$gl_cv_func_wcrtomb_retval" in *yes) ;; - *) REPLACE_WCRTOMB=1 ;; + *) AC_DEFINE([WCRTOMB_RETVAL_BUG], [1], + [Define if the wcrtomb function has an incorrect return value.]) + REPLACE_WCRTOMB=1 ;; esac fi fi |