Index: head/science/gnudatalanguage/files/patch-src_specializations.hpp
===================================================================
--- head/science/gnudatalanguage/files/patch-src_specializations.hpp	(nonexistent)
+++ head/science/gnudatalanguage/files/patch-src_specializations.hpp	(revision 448025)
@@ -0,0 +1,22 @@
+Fix the build with GCC 6 (bug 219300).
+
+Obtained from: https://sourceforge.net/p/gnudatalanguage/bugs/688/#4622
+--- src/specializations.hpp.orig	2017-08-15 19:53:08 UTC
++++ src/specializations.hpp
+@@ -534,16 +534,6 @@ void Data_<SpDString>::MinMax( DLong* minE, DLong* max
+ 
+ // default_io.cpp
+ template<>  
+-std::istream& operator>>(std::istream& i, Data_<SpDFloat>& data_); 
+-template<>  
+-std::istream& operator>>(std::istream& i, Data_<SpDDouble>& data_); 
+-template<>  
+-std::istream& operator>>(std::istream& i, Data_<SpDComplex>& data_); 
+-template<>  
+-std::istream& operator>>(std::istream& i, Data_<SpDComplexDbl>& data_); 
+-template<>  
+-std::istream& operator>>(std::istream& is, Data_<SpDString>& data_); 
+-template<>  
+ std::ostream& Data_<SpDLong>::ToStream(std::ostream& o, SizeT w, SizeT* actPosPtr); 
+ template<>  
+ std::ostream& Data_<SpDULong>::ToStream(std::ostream& o, SizeT w, SizeT* actPosPtr); 

Property changes on: head/science/gnudatalanguage/files/patch-src_specializations.hpp
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+yes
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