From c9da321861271379f2fa33fde34c2a18b9c17d4c Mon Sep 17 00:00:00 2001
From: Douglas Gregor <doug.gregor@gmail.com>
Date: Tue, 29 Apr 2008 17:57:54 +0000
Subject: [PATCH] Add support for MPI_SIGNED_CHAR to Boost.MPI

[SVN r44887]
---
 include/boost/mpi/datatype.hpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/boost/mpi/datatype.hpp b/include/boost/mpi/datatype.hpp
index 9a4664e..f929319 100644
--- a/include/boost/mpi/datatype.hpp
+++ b/include/boost/mpi/datatype.hpp
@@ -293,6 +293,11 @@ BOOST_MPI_DATATYPE(unsigned long long, MPI_UNSIGNED_LONG_LONG, builtin);
 BOOST_MPI_DATATYPE(unsigned __int64, MPI_UNSIGNED_LONG_LONG, builtin); 
 #endif
 
+// Define signed char specialization of is_mpi_datatype, if possible.
+#if defined(MPI_SIGNED_CHAR) || (defined(MPI_VERSION) && MPI_VERSION >= 2)
+BOOST_MPI_DATATYPE(signed char, MPI_SIGNED_CHAR, builtin);
+#endif
+
 #endif // Doxygen
 
 namespace detail {