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Diffstat (limited to 'm4/wcrtomb.m4')
| -rw-r--r-- | m4/wcrtomb.m4 | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/m4/wcrtomb.m4 b/m4/wcrtomb.m4 new file mode 100644 index 0000000..fee21d7 --- /dev/null +++ b/m4/wcrtomb.m4 @@ -0,0 +1,146 @@ +# wcrtomb.m4 serial 17 +dnl Copyright (C) 2008-2022 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. + +AC_DEFUN([gl_FUNC_WCRTOMB], +[ + AC_REQUIRE([gl_WCHAR_H_DEFAULTS]) + + AC_REQUIRE([AC_TYPE_MBSTATE_T]) + gl_MBSTATE_T_BROKEN + + AC_CHECK_FUNCS_ONCE([wcrtomb]) + if test $ac_cv_func_wcrtomb = no; then + HAVE_WCRTOMB=0 + AC_CHECK_DECLS([wcrtomb],,, [[ + #include <wchar.h> + ]]) + if test $ac_cv_have_decl_wcrtomb = yes; then + dnl On Minix 3.1.8, the system's <wchar.h> declares wcrtomb() although + dnl it does not have the function. Avoid a collision with gnulib's + dnl replacement. + REPLACE_WCRTOMB=1 + fi + 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 $REPLACE_WCRTOMB = 0; then + dnl On Android 4.3, wcrtomb produces wrong characters in the C locale. + dnl On AIX 4.3, OSF/1 5.1 and Solaris <= 11.3, wcrtomb (NULL, 0, NULL) + dnl sometimes returns 0 instead of 1. + AC_REQUIRE([AC_PROG_CC]) + AC_REQUIRE([gt_LOCALE_FR]) + AC_REQUIRE([gt_LOCALE_FR_UTF8]) + AC_REQUIRE([gt_LOCALE_JA]) + AC_REQUIRE([gt_LOCALE_ZH_CN]) + AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles + AC_CACHE_CHECK([whether wcrtomb works in the C locale], + [gl_cv_func_wcrtomb_works], + [AC_RUN_IFELSE( + [AC_LANG_SOURCE([[ +#include <string.h> +#include <stdlib.h> +#include <wchar.h> +int main () +{ + mbstate_t state; + char out[64]; + int count; + memset (&state, 0, sizeof (state)); + out[0] = 'x'; + count = wcrtomb (out, L'a', &state); + return !(count == 1 && out[0] == 'a'); +}]])], + [gl_cv_func_wcrtomb_works=yes], + [gl_cv_func_wcrtomb_works=no], + [case "$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 $REPLACE_WCRTOMB = 0; then + AC_CACHE_CHECK([whether wcrtomb return value is correct], + [gl_cv_func_wcrtomb_retval], + [ + dnl Initial guess, used when cross-compiling or when no suitable locale + dnl is present. +changequote(,)dnl + case "$host_os" in + # 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 $LOCALE_ZH_CN != none; then + AC_RUN_IFELSE( + [AC_LANG_SOURCE([[ +#include <locale.h> +#include <string.h> +#include <wchar.h> +#include <stdlib.h> +int main () +{ + int result = 0; + if (setlocale (LC_ALL, "$LOCALE_FR") != NULL) + { + if (wcrtomb (NULL, 0, NULL) != 1) + result |= 1; + } + if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL) + { + if (wcrtomb (NULL, 0, NULL) != 1) + result |= 2; + { + wchar_t wc = (wchar_t) 0xBADFACE; + if (mbtowc (&wc, "\303\274", 2) == 2) + if (wcrtomb (NULL, wc, NULL) != 1) + result |= 2; + } + } + if (setlocale (LC_ALL, "$LOCALE_JA") != NULL) + { + if (wcrtomb (NULL, 0, NULL) != 1) + result |= 4; + } + if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL) + { + if (wcrtomb (NULL, 0, NULL) != 1) + result |= 8; + } + return result; +}]])], + [gl_cv_func_wcrtomb_retval=yes], + [gl_cv_func_wcrtomb_retval=no], + [:]) + fi + ]) + case "$gl_cv_func_wcrtomb_retval" in + *yes) ;; + *) AC_DEFINE([WCRTOMB_RETVAL_BUG], [1], + [Define if the wcrtomb function has an incorrect return value.]) + REPLACE_WCRTOMB=1 ;; + esac + fi + fi +]) + +# Prerequisites of lib/wcrtomb.c. +AC_DEFUN([gl_PREREQ_WCRTOMB], [ + : +]) |