patch to allow odb compiler to work with a project that uses boost libraries

odb_gcc6_fix.patch

From ec777147024fde72e4411cc6b1e1e49f4a1d1804 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Fri, 23 Dec 2016 10:18:01 +0200
Subject: [PATCH] Fix bug in GCC 6 input_location translation

---
 odb/cxx-lexer.cxx |    8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/odb/cxx-lexer.cxx b/odb/cxx-lexer.cxx
index 64df296..ae045d9 100644
--- a/odb/cxx-lexer.cxx
+++ b/odb/cxx-lexer.cxx
@@ -106,7 +106,15 @@ next (string& token, tree* node)
 location_t cxx_pragma_lexer::
 location () const
 {
+  // Starting from GCC 6 the input location seem to require the same
+  // translation as what we do in real_source_location().
+  //
+#if BUILDING_GCC_MAJOR >= 6
+  return linemap_resolve_location (
+    line_table, input_location, LRK_MACRO_EXPANSION_POINT, 0);
+#else
   return input_location;
+#endif
 }
 
 string cxx_pragma_lexer::
-- 
1.7.10.4