1 # iswblank.m4 serial 4 2 dnl Copyright (C) 2011-2012 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_ISWBLANK], 8 [ 9 AC_REQUIRE([gl_WCTYPE_H_DEFAULTS]) 10 AC_REQUIRE([gl_WCTYPE_H]) 11 dnl Persuade glibc <wctype.h> to declare iswblank(). 12 AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) 13 AC_CHECK_FUNCS_ONCE([iswblank]) 14 AC_CHECK_DECLS([iswblank], , , [[ 15 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before 16 <wchar.h>. 17 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be included 18 before <wchar.h>. */ 19 #include <stddef.h> 20 #include <stdio.h> 21 #include <time.h> 22 #include <wchar.h> 23 #include <wctype.h> 24 ]]) 25 if test $ac_cv_func_iswblank = no; then 26 HAVE_ISWBLANK=0 27 if test $ac_cv_have_decl_iswblank = yes; then 28 REPLACE_ISWBLANK=1 29 fi 30 fi 31 if test $HAVE_ISWCNTRL = 0 || test $REPLACE_ISWCNTRL = 1; then 32 dnl Redefine all of iswcntrl, ..., towupper in <wctype.h>. 33 : 34 else 35 if test $HAVE_ISWBLANK = 0 || test $REPLACE_ISWBLANK = 1; then 36 dnl Redefine only iswblank. 37 : 38 fi 39 fi 40 41 ]) 42
