1 # btowc.m4 serial 4 2 dnl Copyright (C) 2008-2009 Free Software Foundation, Inc. 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 AC_CHECK_FUNCS_ONCE([btowc]) 12 if test $ac_cv_func_btowc = no; then 13 HAVE_BTOWC=0 14 else 15 16 dnl IRIX 6.5 btowc(EOF) is 0xFF, not WEOF. 17 AC_REQUIRE([AC_PROG_CC]) 18 AC_REQUIRE([gt_LOCALE_FR]) 19 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles 20 AC_CACHE_CHECK([whether btowc(EOF) is correct], 21 [gl_cv_func_btowc_eof], 22 [ 23 dnl Initial guess, used when cross-compiling or when no suitable locale 24 dnl is present. 25 changequote(,)dnl 26 case "$host_os" in 27 # Guess no on IRIX. 28 irix*) gl_cv_func_btowc_eof="guessing no" ;; 29 # Guess yes otherwise. 30 *) gl_cv_func_btowc_eof="guessing yes" ;; 31 esac 32 changequote([,])dnl 33 if test $LOCALE_FR != none; then 34 AC_TRY_RUN([ 35 #include <locale.h> 36 #include <stdio.h> 37 #include <string.h> 38 #include <wchar.h> 39 int main () 40 { 41 if (setlocale (LC_ALL, "$LOCALE_FR") != NULL) 42 { 43 if (btowc (EOF) != WEOF) 44 return 1; 45 } 46 return 0; 47 }], 48 [gl_cv_func_btowc_eof=yes], 49 [gl_cv_func_btowc_eof=no], 50 [:]) 51 fi 52 ]) 53 case "$gl_cv_func_btowc_eof" in 54 *yes) ;; 55 *) REPLACE_BTOWC=1 ;; 56 esac 57 fi 58 if test $HAVE_BTOWC = 0 || test $REPLACE_BTOWC = 1; then 59 gl_REPLACE_WCHAR_H 60 AC_LIBOBJ([btowc]) 61 gl_PREREQ_BTOWC 62 fi 63 ]) 64 65 # Prerequisites of lib/btowc.c. 66 AC_DEFUN([gl_PREREQ_BTOWC], [ 67 : 68 ]) 69
