HCoop / bpt / guile.git / blame
| Commit | Line | Data |
|---|---|---|
| eb4a14ed | 1 | # btowc.m4 serial 10 |
| 5e69ceb7 | 2 | dnl Copyright (C) 2008-2014 Free Software Foundation, Inc. |
| eb4a14ed LC |
3 | dnl This file is free software; the Free Software Foundation |
| 4 | dnl gives unlimited permission to copy and/or distribute it, | |
| 5 | dnl with or without modifications, as long as this notice is preserved. | |
| 6 | ||
| 7 | AC_DEFUN([gl_FUNC_BTOWC], | |
| 8 | [ | |
| 9 | AC_REQUIRE([gl_WCHAR_H_DEFAULTS]) | |
| 10 | ||
| 11 | dnl Check whether <wchar.h> is usable at all, first. Otherwise the test | |
| 12 | dnl program below may lead to an endless loop. See | |
| 13 | dnl <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42440>. | |
| 14 | AC_REQUIRE([gl_WCHAR_H_INLINE_OK]) | |
| 15 | ||
| 16 | AC_CHECK_FUNCS_ONCE([btowc]) | |
| 17 | if test $ac_cv_func_btowc = no; then | |
| 18 | HAVE_BTOWC=0 | |
| 19 | else | |
| 20 | ||
| 21 | AC_REQUIRE([AC_PROG_CC]) | |
| 22 | AC_REQUIRE([gt_LOCALE_FR]) | |
| 23 | AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles | |
| 24 | ||
| 25 | dnl Cygwin 1.7.2 btowc('\0') is WEOF, not 0. | |
| 26 | AC_CACHE_CHECK([whether btowc(0) is correct], | |
| 27 | [gl_cv_func_btowc_nul], | |
| 28 | [ | |
| 29 | AC_RUN_IFELSE( | |
| 30 | [AC_LANG_SOURCE([[ | |
| 31 | #include <string.h> | |
| 32 | /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before | |
| 33 | <wchar.h>. | |
| 34 | BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be | |
| 35 | included before <wchar.h>. */ | |
| 36 | #include <stddef.h> | |
| 37 | #include <stdio.h> | |
| 38 | #include <time.h> | |
| 39 | #include <wchar.h> | |
| 40 | int main () | |
| 41 | { | |
| 42 | if (btowc ('\0') != 0) | |
| 43 | return 1; | |
| 44 | return 0; | |
| 45 | }]])], | |
| 46 | [gl_cv_func_btowc_nul=yes], | |
| 47 | [gl_cv_func_btowc_nul=no], | |
| 48 | [ | |
| 49 | changequote(,)dnl | |
| 50 | case "$host_os" in | |
| 51 | # Guess no on Cygwin. | |
| 52 | cygwin*) gl_cv_func_btowc_nul="guessing no" ;; | |
| 53 | # Guess yes otherwise. | |
| 54 | *) gl_cv_func_btowc_nul="guessing yes" ;; | |
| 55 | esac | |
| 56 | changequote([,])dnl | |
| 57 | ]) | |
| 58 | ]) | |
| 59 | ||
| 60 | dnl IRIX 6.5 btowc(EOF) is 0xFF, not WEOF. | |
| 61 | AC_CACHE_CHECK([whether btowc(EOF) is correct], | |
| 62 | [gl_cv_func_btowc_eof], | |
| 63 | [ | |
| 64 | dnl Initial guess, used when cross-compiling or when no suitable locale | |
| 65 | dnl is present. | |
| 66 | changequote(,)dnl | |
| 67 | case "$host_os" in | |
| 68 | # Guess no on IRIX. | |
| 69 | irix*) gl_cv_func_btowc_eof="guessing no" ;; | |
| 70 | # Guess yes otherwise. | |
| 71 | *) gl_cv_func_btowc_eof="guessing yes" ;; | |
| 72 | esac | |
| 73 | changequote([,])dnl | |
| 74 | if test $LOCALE_FR != none; then | |
| 75 | AC_RUN_IFELSE( | |
| 76 | [AC_LANG_SOURCE([[ | |
| 77 | #include <locale.h> | |
| 78 | #include <string.h> | |
| 79 | /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before | |
| 80 | <wchar.h>. | |
| 81 | BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be | |
| 82 | included before <wchar.h>. */ | |
| 83 | #include <stddef.h> | |
| 84 | #include <stdio.h> | |
| 85 | #include <time.h> | |
| 86 | #include <wchar.h> | |
| 87 | int main () | |
| 88 | { | |
| 89 | if (setlocale (LC_ALL, "$LOCALE_FR") != NULL) | |
| 90 | { | |
| 91 | if (btowc (EOF) != WEOF) | |
| 92 | return 1; | |
| 93 | } | |
| 94 | return 0; | |
| 95 | }]])], | |
| 96 | [gl_cv_func_btowc_eof=yes], | |
| 97 | [gl_cv_func_btowc_eof=no], | |
| 98 | [:]) | |
| 99 | fi | |
| 100 | ]) | |
| 101 | ||
| 102 | case "$gl_cv_func_btowc_nul" in | |
| 103 | *yes) ;; | |
| 104 | *) REPLACE_BTOWC=1 ;; | |
| 105 | esac | |
| 106 | case "$gl_cv_func_btowc_eof" in | |
| 107 | *yes) ;; | |
| 108 | *) REPLACE_BTOWC=1 ;; | |
| 109 | esac | |
| 110 | fi | |
| 111 | ]) | |
| 112 | ||
| 113 | # Prerequisites of lib/btowc.c. | |
| 114 | AC_DEFUN([gl_PREREQ_BTOWC], [ | |
| 115 | : | |
| 116 | ]) |