diff options
Diffstat (limited to '')
| -rw-r--r-- | m4/iswblank.m4 | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/m4/iswblank.m4 b/m4/iswblank.m4 new file mode 100644 index 0000000..b1220b1 --- /dev/null +++ b/m4/iswblank.m4 @@ -0,0 +1,38 @@ +# iswblank.m4 serial 7 +dnl Copyright (C) 2011-2023 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]) + gl_CHECK_FUNCS_ANDROID([iswblank], [[#include <wctype.h>]]) + AC_CHECK_DECLS([iswblank], , , [[ + #include <wchar.h> + #include <wctype.h> + ]]) + if test $ac_cv_func_iswblank = no; then + HAVE_ISWBLANK=0 + if test $ac_cv_have_decl_iswblank = yes \ + || case "$gl_cv_onwards_func_iswblank" in \ + future*) true ;; \ + *) false ;; \ + esac; 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 + +]) |