| # wctob.m4 serial 12 |
| 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. |
| |
| AC_DEFUN([gl_FUNC_WCTOB], |
| [ |
| AC_REQUIRE([gl_WCHAR_H_DEFAULTS]) |
| |
| AC_CHECK_FUNCS_ONCE([wctob]) |
| if test $ac_cv_func_wctob = no; then |
| HAVE_WCTOB=0 |
| HAVE_DECL_WCTOB=0 |
| else |
| HAVE_WCTOB=1 |
| |
| dnl Solaris 9 has the wctob() function but it does not work. |
| dnl Cygwin 1.7.2 has the wctob() function but it clobbers caller-owned |
| dnl registers, see <https://cygwin.com/ml/cygwin/2010-05/msg00015.html>. |
| AC_REQUIRE([AC_PROG_CC]) |
| AC_REQUIRE([gt_LOCALE_FR]) |
| AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| AC_CACHE_CHECK([whether wctob works], |
| [gl_cv_func_wctob_works], |
| [ |
| dnl Initial guess, used when cross-compiling or when no suitable locale |
| dnl is present. |
| changequote(,)dnl |
| case "$host_os" in |
| # Guess no on Solaris <= 9 and Cygwin. |
| solaris2.[1-9] | solaris2.[1-9].* | cygwin*) |
| gl_cv_func_wctob_works="guessing no" ;; |
| # Guess no on native Windows. |
| mingw*) |
| gl_cv_func_wctob_works="guessing no" ;; |
| # Guess yes otherwise. |
| *) gl_cv_func_wctob_works="guessing yes" ;; |
| esac |
| changequote([,])dnl |
| case "$host_os" in |
| cygwin*) |
| AC_RUN_IFELSE( |
| [AC_LANG_SOURCE([[ |
| #include <locale.h> |
| /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before |
| <wchar.h>. |
| BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be |
| included before <wchar.h>. */ |
| #include <stddef.h> |
| #include <stdio.h> |
| #include <time.h> |
| #include <wchar.h> |
| |
| register long global __asm__ ("%ebx"); |
| |
| int main () |
| { |
| setlocale (LC_ALL, "en_US.UTF-8"); |
| |
| global = 0x12345678; |
| if (wctob (0x00FC) != -1) |
| return 1; |
| if (global != 0x12345678) |
| return 2; |
| return 0; |
| }]])], |
| [:], |
| [gl_cv_func_wctob_works=no], |
| [:]) |
| ;; |
| esac |
| if test "$gl_cv_func_wctob_works" != no && test $LOCALE_FR != none; then |
| AC_RUN_IFELSE( |
| [AC_LANG_SOURCE([[ |
| #include <locale.h> |
| #include <stdlib.h> |
| #include <string.h> |
| /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before |
| <wchar.h>. |
| BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be |
| included before <wchar.h>. */ |
| #include <stddef.h> |
| #include <stdio.h> |
| #include <time.h> |
| #include <wchar.h> |
| int main () |
| { |
| if (setlocale (LC_ALL, "$LOCALE_FR") != NULL) |
| { |
| wchar_t wc; |
| |
| if (mbtowc (&wc, "\374", 1) == 1) |
| if (wctob (wc) != (unsigned char) '\374') |
| return 1; |
| } |
| return 0; |
| }]])], |
| [gl_cv_func_wctob_works=yes], |
| [gl_cv_func_wctob_works=no], |
| [:]) |
| fi |
| ]) |
| case "$gl_cv_func_wctob_works" in |
| *yes) ;; |
| *) REPLACE_WCTOB=1 ;; |
| esac |
| if test $REPLACE_WCTOB = 0; then |
| |
| dnl IRIX 6.5 has the wctob() function but does not declare it. |
| AC_CHECK_DECLS([wctob], [], [], [[ |
| /* 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 <time.h> |
| #include <wchar.h> |
| ]]) |
| if test $ac_cv_have_decl_wctob != yes; then |
| HAVE_DECL_WCTOB=0 |
| fi |
| fi |
| fi |
| ]) |
| |
| # Prerequisites of lib/wctob.c. |
| AC_DEFUN([gl_PREREQ_WCTOB], [ |
| : |
| ]) |