Make yaml-cpp usable on HEAD for software that wants C++17.

yaml-cpp uses auto_ptr in a small number of places. This is problematic,
as libc++ 5.0.0 (used on HEAD) has auto_ptr disabled when building for
C++17. This causes the build for cloudabi-utils to fail on HEAD.

Instead of removing all of the use of auto_ptr from yaml-cpp, this
commit only changes public header files to make use of unique_ptr.

As I also ran into this issue for CloudABI, here's a bug report I filed
upstream a couple of weeks ago:

https://github.com/jbeder/yaml-cpp/issues/523

Reported by:	pkg-fallout :-C
Reviewed by:	madpilot, mat
Differential Revision:	https://reviews.freebsd.org/D12285

3 files changed, 25 insertions, 1 deletions

diff --git a/devel/yaml-cpp/Makefile b/devel/yaml-cpp/Makefile
index b56b943ee40f..74e8dc945b51 100644
--- a/devel/yaml-cpp/Makefile
+++ b/devel/yaml-cpp/Makefile
@@ -4,7 +4,7 @@
 PORTNAME=	yaml-cpp
 PORTVERSION=	0.5.3
 DISTVERSIONPREFIX=	release-
-PORTREVISION=	3
+PORTREVISION=	4
 CATEGORIES=	devel
 
 MAINTAINER=	madpilot@FreeBSD.org
diff --git a/devel/yaml-cpp/files/patch-include_yaml-cpp_emitter.h b/devel/yaml-cpp/files/patch-include_yaml-cpp_emitter.h
new file mode 100644
index 000000000000..2e7e09a71521
--- /dev/null
+++ b/devel/yaml-cpp/files/patch-include_yaml-cpp_emitter.h
@@ -0,0 +1,11 @@
+--- include/yaml-cpp/emitter.h.orig	2016-01-10 18:11:40 UTC
++++ include/yaml-cpp/emitter.h
+@@ -122,7 +122,7 @@ class YAML_CPP_API Emitter : private non
+   bool CanEmitNewline() const;
+ 
+  private:
+-  std::auto_ptr<EmitterState> m_pState;
++  std::unique_ptr<EmitterState> m_pState;
+   ostream_wrapper m_stream;
+ };
+ 
diff --git a/devel/yaml-cpp/files/patch-include_yaml-cpp_parser.h b/devel/yaml-cpp/files/patch-include_yaml-cpp_parser.h
new file mode 100644
index 000000000000..dd5ebd96e8aa
--- /dev/null
+++ b/devel/yaml-cpp/files/patch-include_yaml-cpp_parser.h
@@ -0,0 +1,13 @@
+--- include/yaml-cpp/parser.h.orig	2016-01-10 18:11:40 UTC
++++ include/yaml-cpp/parser.h
+@@ -40,8 +40,8 @@ class YAML_CPP_API Parser : private nonc
+   void HandleTagDirective(const Token& token);
+ 
+  private:
+-  std::auto_ptr<Scanner> m_pScanner;
+-  std::auto_ptr<Directives> m_pDirectives;
++  std::unique_ptr<Scanner> m_pScanner;
++  std::unique_ptr<Directives> m_pDirectives;
+ };
+ }
+