stabilize build system: depends, installer, boost/bdb fixes, cross targets groundwork

depends/x86_64-pc-linux-gnu/include/boost/vmd/is_empty.hpp

@@ -0,0 +1,95 @@
+
+//  (C) Copyright Edward Diener 2011-2015
+//  Use, modification and distribution are subject to the Boost Software License,
+//  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt).
+
+#if !defined(BOOST_VMD_IS_EMPTY_HPP)
+#define BOOST_VMD_IS_EMPTY_HPP
+
+#include <boost/vmd/detail/setup.hpp>
+
+#if BOOST_PP_VARIADICS
+
+#include <boost/preprocessor/punctuation/is_begin_parens.hpp>
+#include <boost/vmd/detail/is_empty.hpp>
+
+/*
+
+  The succeeding comments in this file are in doxygen format.
+
+*/
+
+/** \file
+*/
+
+/** \def BOOST_VMD_IS_EMPTY(...)
+
+    \brief Tests whether its input is empty or not.
+
+    The macro checks to see if the input is empty or not.
+    It returns 1 if the input is empty, else returns 0.
+    
+    The macro is a variadic macro taking any input.
+    For the VC++8 compiler (VS2005) the macro takes a single parameter of input to check.
+    
+    The macro is not perfect, and can not be so. The problem
+    area is if the input to be checked is a function-like
+    macro name, in which case either a compiler error can result
+    or a false result can occur.
+    
+    This macro is a replacement, using variadic macro support,
+    for the undocumented macro BOOST_PP_IS_EMPTY in the Boost
+    PP library. The code is taken from a posting by Paul Mensonides
+    of a variadic version for BOOST_PP_IS_EMPTY, and changed 
+    in order to also support VC++.
+    
+    .... = variadic input, for VC++8 this must be a single parameter
+
+    returns = 1 if the input is empty, 0 if it is not
+    
+    It is recommended to append BOOST_PP_EMPTY() to whatever input
+    is being tested in order to avoid possible warning messages 
+    from some compilers about no parameters being passed to the macro
+    when the input is truly empty.
+    
+*/
+
+#if BOOST_VMD_MSVC_V8
+
+#define BOOST_VMD_IS_EMPTY(sequence) \
+    BOOST_VMD_DETAIL_IS_EMPTY_IIF \
+      ( \
+      BOOST_PP_IS_BEGIN_PARENS \
+        ( \
+        sequence \
+        ) \
+      ) \
+      ( \
+      BOOST_VMD_DETAIL_IS_EMPTY_GEN_ZERO, \
+      BOOST_VMD_DETAIL_IS_EMPTY_PROCESS \
+      ) \
+    (sequence) \
+/**/
+
+#else
+
+#define BOOST_VMD_IS_EMPTY(...) \
+    BOOST_VMD_DETAIL_IS_EMPTY_IIF \
+      ( \
+      BOOST_PP_IS_BEGIN_PARENS \
+        ( \
+        __VA_ARGS__ \
+        ) \
+      ) \
+      ( \
+      BOOST_VMD_DETAIL_IS_EMPTY_GEN_ZERO, \
+      BOOST_VMD_DETAIL_IS_EMPTY_PROCESS \
+      ) \
+    (__VA_ARGS__) \
+/**/
+
+#endif /* BOOST_VMD_MSVC_V8 */
+
+#endif /* BOOST_PP_VARIADICS */
+#endif /* BOOST_VMD_IS_EMPTY_HPP */