Rename AC_ prefixes to AX_ (only in names of aa macros!).

1 files changed, 41 insertions, 0 deletions

diff --git a/m4/ax_cxx_bool.m4 b/m4/ax_cxx_bool.m4
new file mode 100644
index 0000000..bd9fbe5
--- /dev/null
+++ b/m4/ax_cxx_bool.m4
@@ -0,0 +1,41 @@
+# ===========================================================================
+#           http://www.nongnu.org/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.
+
+AC_DEFUN([AX_CXX_BOOL],
+[AC_CACHE_CHECK(whether the compiler recognizes bool as a built-in type,
+ac_cv_cxx_bool,
+[AC_LANG_SAVE
+ AC_LANG_CPLUSPLUS
+ AC_TRY_COMPILE([
+int f(int  x){return 1;}
+int f(char x){return 1;}
+int f(bool x){return 1;}
+],[bool b = true; return f(b);],
+ ac_cv_cxx_bool=yes, ac_cv_cxx_bool=no)
+ AC_LANG_RESTORE
+])
+if test "$ac_cv_cxx_bool" = yes; then
+  AC_DEFINE(HAVE_BOOL,,[define if bool is a built-in type])
+fi
+])