Flipped the include guard and the pragma, and don't use the pragma for early versions of gcc (< 3.4)

include/yaml-cpp/aliasmanager.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef ALIASMANAGER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define ALIASMANAGER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 #include "yaml-cpp/anchor.h"
 #include <map>
 

include/yaml-cpp/anchor.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef ANCHOR_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define ANCHOR_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 #include <cstddef>
 
 namespace YAML

include/yaml-cpp/contrib/anchordict.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef ANCHORDICT_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define ANCHORDICT_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 #include <vector>
 
 #include "../anchor.h"

include/yaml-cpp/contrib/graphbuilder.h

@@ -1,6 +1,10 @@
 #ifndef GRAPHBUILDER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define GRAPHBUILDER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 #include <string>
 
 namespace YAML

include/yaml-cpp/conversion.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef CONVERSION_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define CONVERSION_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include "yaml-cpp/null.h"
 #include "yaml-cpp/traits.h"

include/yaml-cpp/emitfromevents.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef EMITFROMEVENTS_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define EMITFROMEVENTS_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 #include "yaml-cpp/eventhandler.h"
 #include <stack>
 

include/yaml-cpp/emitter.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef EMITTER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define EMITTER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include "yaml-cpp/emittermanip.h"
 #include "yaml-cpp/ostream.h"

include/yaml-cpp/emittermanip.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef EMITTERMANIP_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define EMITTERMANIP_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include <string>
 

include/yaml-cpp/eventhandler.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef EVENTHANDLER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define EVENTHANDLER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 #include "yaml-cpp/anchor.h"
 #include <string>
 

include/yaml-cpp/exceptions.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef EXCEPTIONS_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define EXCEPTIONS_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include "yaml-cpp/mark.h"
 #include "yaml-cpp/traits.h"

include/yaml-cpp/iterator.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef ITERATOR_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define ITERATOR_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 namespace YAML
 {

include/yaml-cpp/mark.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef MARK_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define MARK_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 namespace YAML
 {

include/yaml-cpp/node.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef NODE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define NODE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include "yaml-cpp/conversion.h"
 #include "yaml-cpp/exceptions.h"

include/yaml-cpp/nodeimpl.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef NODEIMPL_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define NODEIMPL_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include "yaml-cpp/nodeutil.h"
 

include/yaml-cpp/nodeproperties.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef NODEPROPERTIES_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define NODEPROPERTIES_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 namespace YAML
 {
 	struct NodeProperties {

include/yaml-cpp/nodereadimpl.h

@@ -1,4 +1,10 @@
+#ifndef NODEREADIMPL_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define NODEREADIMPL_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
 #pragma once
+#endif
+
 
 namespace YAML
 {
@@ -76,3 +82,5 @@ namespace YAML
 		return Convert(scalar, value);
 	}
 }
+
+#endif // NODEREADIMPL_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/yaml-cpp/nodeutil.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef NODEUTIL_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define NODEUTIL_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 namespace YAML
 {

include/yaml-cpp/noncopyable.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef NONCOPYABLE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define NONCOPYABLE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 namespace YAML
 {

include/yaml-cpp/null.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef NULL_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define NULL_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 namespace YAML
 {

include/yaml-cpp/ostream.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef OSTREAM_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define OSTREAM_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include <string>
 

include/yaml-cpp/parser.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef PARSER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define PARSER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include "yaml-cpp/noncopyable.h"
 #include <ios>

include/yaml-cpp/stlemitter.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef STLEMITTER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define STLEMITTER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include <vector>
 #include <list>

include/yaml-cpp/stlnode.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef STLNODE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define STLNODE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include <vector>
 #include <map>

include/yaml-cpp/traits.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef TRAITS_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define TRAITS_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 namespace YAML
 {

include/yaml-cpp/yaml.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef YAML_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define YAML_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include "yaml-cpp/parser.h"
 #include "yaml-cpp/node.h"

src/aliascontent.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef ALIASCONTENT_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define ALIASCONTENT_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include "content.h"
 

src/collectionstack.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef COLLECTIONSTACK_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define COLLECTIONSTACK_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include <stack>
 #include <cassert>

src/content.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef CONTENT_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define CONTENT_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include "yaml-cpp/anchor.h"
 #include "yaml-cpp/exceptions.h"

src/contrib/graphbuilderadapter.h

@@ -1,6 +1,10 @@
 #ifndef GRAPHBUILDERADAPTER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define GRAPHBUILDERADAPTER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 #include <map>
 #include <stack>
 #include "yaml-cpp/eventhandler.h"

src/directives.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef DIRECTIVES_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define DIRECTIVES_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include <string>
 #include <map>

src/emitterstate.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef EMITTERSTATE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define EMITTERSTATE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include "setting.h"
 #include "yaml-cpp/emittermanip.h"

src/emitterutils.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef EMITTERUTILS_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define EMITTERUTILS_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include "yaml-cpp/ostream.h"
 #include <string>

src/exp.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef EXP_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define EXP_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include "regex.h"
 #include <string>

src/indentation.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef INDENTATION_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define INDENTATION_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include "yaml-cpp/ostream.h"
 #include <iostream>

src/iterpriv.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef ITERPRIV_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define ITERPRIV_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include "ltnode.h"
 #include <vector>

src/ltnode.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef LTNODE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define LTNODE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 namespace YAML
 {

src/map.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef MAP_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define MAP_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include "content.h"
 #include <map>

src/nodebuilder.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef NODEBUILDER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define NODEBUILDER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 #include "yaml-cpp/eventhandler.h"
 #include "ptr_stack.h"
 #include <map>

src/ptr_stack.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef PTR_STACK_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define PTR_STACK_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 #include "yaml-cpp/noncopyable.h"
 #include <memory>
 #include <vector>

src/regex.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef REGEX_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define REGEX_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include <vector>
 #include <string>

src/regeximpl.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef REGEXIMPL_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define REGEXIMPL_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include "stream.h"
 #include "stringsource.h"

src/scalar.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef SCALAR_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define SCALAR_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include "content.h"
 #include <string>

src/scanner.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef SCANNER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define SCANNER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include <ios>
 #include <string>

src/scanscalar.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef SCANSCALAR_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define SCANSCALAR_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include <string>
 #include "regex.h"

src/scantag.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef SCANTAG_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define SCANTAG_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include <string>
 #include "stream.h"

src/sequence.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef SEQUENCE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define SEQUENCE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include "content.h"
 #include <vector>

src/setting.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef SETTING_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define SETTING_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include <memory>
 #include <vector>

src/singledocparser.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef SINGLEDOCPARSER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define SINGLEDOCPARSER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include "yaml-cpp/anchor.h"
 #include "yaml-cpp/noncopyable.h"

src/stream.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef STREAM_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define STREAM_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include "yaml-cpp/noncopyable.h"
 #include "yaml-cpp/mark.h"

src/streamcharsource.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef STREAMCHARSOURCE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define STREAMCHARSOURCE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include "yaml-cpp/noncopyable.h"
 #include <cstddef>

src/stringsource.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef STRINGSOURCE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define STRINGSOURCE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include <cstddef>
 

src/tag.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef TAG_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define TAG_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 #include <string>
 
 namespace YAML

src/token.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef TOKEN_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define TOKEN_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 
 #include "yaml-cpp/mark.h"
 #include <iostream>

test/emittertests.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef EMITTERTESTS_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define EMITTERTESTS_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 namespace Test {
 	bool RunEmitterTests();
 }

test/parsertests.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef PARSERTESTS_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define PARSERTESTS_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 namespace Test {
 	bool RunParserTests();
 }

test/spectests.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef SPECTESTS_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define SPECTESTS_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 namespace Test {
 	bool RunSpecTests();
 }

test/tests.h

@@ -1,8 +1,10 @@
-#pragma once
-
 #ifndef TESTS_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define TESTS_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
+#if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
+#pragma once
+#endif
+
 #include <string>
 
 namespace Test {