| cristy | 964cb7f | 2010-04-25 23:18:00 +0000 | [diff] [blame] | 1 | # =========================================================================== |
| 2 | # http://www.gnu.org/software/autoconf-archive/ax_cxx_bool.html |
| 3 | # =========================================================================== |
| 4 | # |
| 5 | # SYNOPSIS |
| 6 | # |
| 7 | # AX_CXX_BOOL |
| 8 | # |
| 9 | # DESCRIPTION |
| 10 | # |
| 11 | # If the compiler recognizes bool as a separate built-in type, define |
| 12 | # HAVE_BOOL. Note that a typedef is not a separate type since you cannot |
| 13 | # overload a function such that it accepts either the basic type or the |
| 14 | # typedef. |
| 15 | # |
| 16 | # LICENSE |
| 17 | # |
| 18 | # Copyright (c) 2008 Todd Veldhuizen |
| 19 | # Copyright (c) 2008 Luc Maisonobe <luc@spaceroots.org> |
| 20 | # |
| 21 | # Copying and distribution of this file, with or without modification, are |
| 22 | # permitted in any medium without royalty provided the copyright notice |
| 23 | # and this notice are preserved. This file is offered as-is, without any |
| 24 | # warranty. |
| 25 | |
| 26 | #serial 6 |
| 27 | |
| 28 | AU_ALIAS([AC_CXX_BOOL], [AX_CXX_BOOL]) |
| 29 | AC_DEFUN([AX_CXX_BOOL], |
| 30 | [AC_CACHE_CHECK(whether the compiler recognizes bool as a built-in type, |
| 31 | ax_cv_cxx_bool, |
| 32 | [AC_LANG_SAVE |
| 33 | AC_LANG_CPLUSPLUS |
| 34 | AC_TRY_COMPILE([ |
| 35 | int f(int x){return 1;} |
| 36 | int f(char x){return 1;} |
| 37 | int f(bool x){return 1;} |
| 38 | ],[bool b = true; return f(b);], |
| 39 | ax_cv_cxx_bool=yes, ax_cv_cxx_bool=no) |
| 40 | AC_LANG_RESTORE |
| 41 | ]) |
| 42 | if test "$ax_cv_cxx_bool" = yes; then |
| 43 | AC_DEFINE(HAVE_BOOL,,[define if bool is a built-in type]) |
| 44 | fi |
| 45 | ]) |