gnulib/import/m4/isblank.m4

   1 # isblank.m4 serial 3
   2 dnl Copyright (C) 2009-2021 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_ISBLANK],
   8 [
   9   dnl Persuade glibc <ctype.h> to declare isblank().
  10   AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
  11
  12   AC_REQUIRE([gl_CTYPE_H_DEFAULTS])
  13   AC_CHECK_FUNCS_ONCE([isblank])
  14   if test $ac_cv_func_isblank = no; then
  15     HAVE_ISBLANK=0
  16   fi
  17 ])