| Ying Wang | 0543663 | 2013-04-05 16:01:00 -0700 | [diff] [blame] | 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 | ]) |