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Diffstat (limited to '')
| -rw-r--r-- | m4/iswblank.m4 | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/m4/iswblank.m4 b/m4/iswblank.m4 new file mode 100644 index 0000000..4906a47 --- /dev/null +++ b/m4/iswblank.m4 @@ -0,0 +1,41 @@ +# iswblank.m4 serial 4 +dnl Copyright (C) 2011-2018 Free Software Foundation, Inc. +dnl This file is free software; the Free Software Foundation +dnl gives unlimited permission to copy and/or distribute it, +dnl with or without modifications, as long as this notice is preserved. + +AC_DEFUN([gl_FUNC_ISWBLANK], +[ + AC_REQUIRE([gl_WCTYPE_H_DEFAULTS]) + AC_REQUIRE([gl_WCTYPE_H]) + dnl Persuade glibc <wctype.h> to declare iswblank(). + AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) + AC_CHECK_FUNCS_ONCE([iswblank]) + AC_CHECK_DECLS([iswblank], , , [[ +/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before + <wchar.h>. + BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be included + before <wchar.h>. */ +#include <stddef.h> +#include <stdio.h> +#include <time.h> +#include <wchar.h> +#include <wctype.h> +]]) + if test $ac_cv_func_iswblank = no; then + HAVE_ISWBLANK=0 + if test $ac_cv_have_decl_iswblank = yes; then + REPLACE_ISWBLANK=1 + fi + fi + if test $HAVE_ISWCNTRL = 0 || test $REPLACE_ISWCNTRL = 1; then + dnl Redefine all of iswcntrl, ..., towupper in <wctype.h>. + : + else + if test $HAVE_ISWBLANK = 0 || test $REPLACE_ISWBLANK = 1; then + dnl Redefine only iswblank. + : + fi + fi + +]) |