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30 lines
879 B
30 lines
879 B
dnl @synopsis AC_CXX_HAVE_BOOL
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dnl
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dnl If the compiler recognizes bool as a separate built-in type, define
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dnl HAVE_BOOL. Note that a typedef is not a separate type since you
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dnl cannot overload a function such that it accepts either the basic
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dnl type or the typedef.
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dnl
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dnl @category Cxx
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dnl @author Todd Veldhuizen
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dnl @author Luc Maisonobe <luc@spaceroots.org>
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dnl @version 2004-02-04
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dnl @license AllPermissive
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AC_DEFUN([AC_CXX_HAVE_BOOL],
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[AC_CACHE_CHECK(whether the compiler recognizes bool as a built-in type,
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ac_cv_cxx_have_bool,
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[AC_LANG_SAVE
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AC_LANG_CPLUSPLUS
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AC_TRY_COMPILE([
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int f(int x){return 1;}
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int f(char x){return 1;}
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int f(bool x){return 1;}
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],[bool b = true; return f(b);],
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ac_cv_cxx_have_bool=yes, ac_cv_cxx_have_bool=no)
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AC_LANG_RESTORE
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])
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if test "$ac_cv_cxx_have_bool" = yes; then
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AC_DEFINE(HAVE_BOOL,,[define if bool is a built-in type])
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fi
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])
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