| # =========================================================================== |
| # 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 <[email protected]> |
| # |
| # 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])]) |
| ]) |
