[PATCH, dwarflint] Explicitly qualify specializations of elfutils::to_string

[David Malcolm <dmalcolm@redhat.com>]

I attempted to build the "dwarflint" branch with gcc 7.3.1 , but ran
into various problems of the form:

c++/known.cc:220:1: error: explicit specialization of ‘template<class type> std::__cxx11::string elfutils::to_string(const type&)’ outside its namespace must use a nested-name-specifier [-fpermissive]
 to_string<dwarf::dwarf_enum> (const dwarf::dwarf_enum &value)
 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~

The fix appears to be trivial.

libdw/ChangeLog:
	* c++/edit-values.cc (to_string<dwarf_edit::attribute>):
	Explicitly qualify with "elfutils::".
	* c++/known.cc (to_string<dwarf::dwarf_enum>): Likewise.
	(to_string<dwarf_data::dwarf_enum>): Likewise.
	* c++/output-values.cc (to_string<dwarf_output::attribute>):
	Likewise.
	* c++/values.cc (to_string<dwarf::attribute>): Likewise.
	(to_string<dwarf::attr_value>): Likewise.
	(to_string<dwarf_edit::attr_value>): Likewise.
	(to_string<dwarf_output::attr_value>): Likewise.

Signed-off-by: David Malcolm <dmalcolm@redhat.com>
---
 libdw/c++/edit-values.cc   | 2 +-
 libdw/c++/known.cc         | 4 ++--
 libdw/c++/output-values.cc | 2 +-
 libdw/c++/values.cc        | 8 ++++----
 4 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/libdw/c++/edit-values.cc b/libdw/c++/edit-values.cc
index aefb5fd1..ca83a967 100644
--- a/libdw/c++/edit-values.cc
+++ b/libdw/c++/edit-values.cc
@@ -41,7 +41,7 @@ template class dwarf_data::value<dwarf_edit>;
 
 template<>
 std::string
-to_string<dwarf_edit::attribute> (const dwarf_edit::attribute &attr)
+elfutils::to_string<dwarf_edit::attribute> (const dwarf_edit::attribute &attr)
 {
   return attribute_string (attr);
 }
diff --git a/libdw/c++/known.cc b/libdw/c++/known.cc
index bd84f52c..cb5fe693 100644
--- a/libdw/c++/known.cc
+++ b/libdw/c++/known.cc
@@ -217,14 +217,14 @@ enum_string (const value_type &value)
 
 template<>
 string
-to_string<dwarf::dwarf_enum> (const dwarf::dwarf_enum &value)
+elfutils::to_string<dwarf::dwarf_enum> (const dwarf::dwarf_enum &value)
 {
   return enum_string (value);
 }
 
 template<>
 string
-to_string<dwarf_data::dwarf_enum> (const dwarf_data::dwarf_enum &value)
+elfutils::to_string<dwarf_data::dwarf_enum> (const dwarf_data::dwarf_enum &value)
 {
   return enum_string (value);
 }
diff --git a/libdw/c++/output-values.cc b/libdw/c++/output-values.cc
index 199c72bd..60abc0b5 100644
--- a/libdw/c++/output-values.cc
+++ b/libdw/c++/output-values.cc
@@ -46,7 +46,7 @@ template class dwarf_output::copier<dwarf_edit>;
 
 template<>
 std::string
-to_string<dwarf_output::attribute> (const dwarf_output::attribute &attr)
+elfutils::to_string<dwarf_output::attribute> (const dwarf_output::attribute &attr)
 {
   return attribute_string (attr);
 }
diff --git a/libdw/c++/values.cc b/libdw/c++/values.cc
index 335074fb..c70d793f 100644
--- a/libdw/c++/values.cc
+++ b/libdw/c++/values.cc
@@ -227,28 +227,28 @@ value_string (const value_type &value)
 
 template<>
 string
-to_string<dwarf::attribute> (const dwarf::attribute &attr)
+elfutils::to_string<dwarf::attribute> (const dwarf::attribute &attr)
 {
   return attribute_string (attr);
 }
 
 template<>
 string
-to_string<dwarf::attr_value> (const dwarf::attr_value &value)
+elfutils::to_string<dwarf::attr_value> (const dwarf::attr_value &value)
 {
   return value_string (value);
 }
 
 template<>
 string
-to_string<dwarf_edit::attr_value> (const dwarf_edit::attr_value &value)
+elfutils::to_string<dwarf_edit::attr_value> (const dwarf_edit::attr_value &value)
 {
   return value_string (value);
 }
 
 template<>
 string
-to_string<dwarf_output::attr_value> (const dwarf_output::attr_value &value)
+elfutils::to_string<dwarf_output::attr_value> (const dwarf_output::attr_value &value)
 {
   return value_string (value);
 }
-- 
2.13.6