| 1 | # wctob.m4 serial 13
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| 2 | dnl Copyright (C) 2008-2021 Free Software Foundation, Inc.
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| 3 | dnl This file is free software; the Free Software Foundation
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| 4 | dnl gives unlimited permission to copy and/or distribute it,
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| 5 | dnl with or without modifications, as long as this notice is preserved.
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| 6 |
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| 7 | AC_DEFUN([gl_FUNC_WCTOB],
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| 8 | [
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| 9 | AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
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| 10 |
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| 11 | AC_CHECK_FUNCS_ONCE([wctob])
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| 12 | if test $ac_cv_func_wctob = no; then
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| 13 | HAVE_WCTOB=0
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| 14 | HAVE_DECL_WCTOB=0
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| 15 | else
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| 16 | HAVE_WCTOB=1
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| 17 |
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| 18 | dnl Solaris 9 has the wctob() function but it does not work.
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| 19 | dnl Cygwin 1.7.2 has the wctob() function but it clobbers caller-owned
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| 20 | dnl registers, see <https://cygwin.com/ml/cygwin/2010-05/msg00015.html>.
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| 21 | AC_REQUIRE([AC_PROG_CC])
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| 22 | AC_REQUIRE([gt_LOCALE_FR])
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| 23 | AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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| 24 | AC_CACHE_CHECK([whether wctob works],
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| 25 | [gl_cv_func_wctob_works],
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| 26 | [
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| 27 | dnl Initial guess, used when cross-compiling or when no suitable locale
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| 28 | dnl is present.
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| 29 | changequote(,)dnl
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| 30 | case "$host_os" in
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| 31 | # Guess no on Solaris <= 9 and Cygwin.
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| 32 | solaris2.[1-9] | solaris2.[1-9].* | cygwin*)
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| 33 | gl_cv_func_wctob_works="guessing no" ;;
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| 34 | # Guess no on native Windows.
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| 35 | mingw*)
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| 36 | gl_cv_func_wctob_works="guessing no" ;;
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| 37 | # Guess yes otherwise.
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| 38 | *) gl_cv_func_wctob_works="guessing yes" ;;
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| 39 | esac
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| 40 | changequote([,])dnl
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| 41 | case "$host_os" in
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| 42 | cygwin*)
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| 43 | AC_RUN_IFELSE(
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| 44 | [AC_LANG_SOURCE([[
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| 45 | #include <locale.h>
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| 46 | #include <wchar.h>
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| 47 |
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| 48 | register long global __asm__ ("%ebx");
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| 49 |
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| 50 | int main ()
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| 51 | {
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| 52 | setlocale (LC_ALL, "en_US.UTF-8");
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| 53 |
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| 54 | global = 0x12345678;
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| 55 | if (wctob (0x00FC) != -1)
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| 56 | return 1;
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| 57 | if (global != 0x12345678)
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| 58 | return 2;
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| 59 | return 0;
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| 60 | }]])],
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| 61 | [:],
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| 62 | [gl_cv_func_wctob_works=no],
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| 63 | [:])
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| 64 | ;;
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| 65 | esac
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| 66 | if test "$gl_cv_func_wctob_works" != no && test $LOCALE_FR != none; then
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| 67 | AC_RUN_IFELSE(
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| 68 | [AC_LANG_SOURCE([[
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| 69 | #include <locale.h>
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| 70 | #include <stdlib.h>
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| 71 | #include <wchar.h>
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| 72 | int main ()
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| 73 | {
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| 74 | if (setlocale (LC_ALL, "$LOCALE_FR") != NULL)
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| 75 | {
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| 76 | wchar_t wc;
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| 77 |
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| 78 | if (mbtowc (&wc, "\374", 1) == 1)
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| 79 | if (wctob (wc) != (unsigned char) '\374')
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| 80 | return 1;
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| 81 | }
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| 82 | return 0;
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| 83 | }]])],
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| 84 | [gl_cv_func_wctob_works=yes],
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| 85 | [gl_cv_func_wctob_works=no],
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| 86 | [:])
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| 87 | fi
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| 88 | ])
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| 89 | case "$gl_cv_func_wctob_works" in
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| 90 | *yes) ;;
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| 91 | *) REPLACE_WCTOB=1 ;;
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| 92 | esac
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| 93 | if test $REPLACE_WCTOB = 0; then
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| 94 |
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| 95 | dnl IRIX 6.5 has the wctob() function but does not declare it.
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| 96 | AC_CHECK_DECLS([wctob], [], [], [[
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| 97 | #include <wchar.h>
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| 98 | ]])
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| 99 | if test $ac_cv_have_decl_wctob != yes; then
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| 100 | HAVE_DECL_WCTOB=0
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| 101 | fi
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| 102 | fi
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| 103 | fi
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| 104 | ])
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| 105 |
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| 106 | # Prerequisites of lib/wctob.c.
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| 107 | AC_DEFUN([gl_PREREQ_WCTOB], [
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| 108 | :
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| 109 | ])
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