|
- # ===========================================================================
- # https://www.gnu.org/software/autoconf-archive/ax_cxx_bool.html
- # ===========================================================================
- #
- # SYNOPSIS
- #
- # AX_CXX_BOOL
- #
- # DESCRIPTION
- #
- # If the compiler recognizes bool as a separate built-in type, define
- # HAVE_BOOL. Note that a typedef is not a separate type since you cannot
- # overload a function such that it accepts either the basic type or the
- # typedef.
- #
- # LICENSE
- #
- # Copyright (c) 2008 Todd Veldhuizen
- # Copyright (c) 2008 Luc Maisonobe <luc@spaceroots.org>
- #
- # Copying and distribution of this file, with or without modification, are
- # permitted in any medium without royalty provided the copyright notice
- # and this notice are preserved. This file is offered as-is, without any
- # warranty.
-
- #serial 8
-
- AU_ALIAS([AC_CXX_BOOL], [AX_CXX_BOOL])
- AC_DEFUN([AX_CXX_BOOL],
- [dnl
- AC_CACHE_CHECK(whether the compiler recognizes bool as a built-in type,
- ax_cv_cxx_bool,
- [dnl
- AC_LANG_PUSH([C++])
- AC_COMPILE_IFELSE([dnl
- AC_LANG_PROGRAM([int f(int x){return 1;}
- int f(char x){return 1;}
- int f(bool x){return 1;}],
- [bool b = true; return f(b);])],
- ax_cv_cxx_bool=yes, ax_cv_cxx_bool=no)
- AC_LANG_POP([C++])
- ])
- AS_IF([test "X$ax_cv_cxx_bool" = Xyes],
- [AC_DEFINE(HAVE_BOOL,,[define if bool is a built-in type])])
- ])
|
