media-gfx/slic3r: make v1.2.9 code c++11 compatible for gcc6+

Bug: http://bugs.gentoo.org/622338

Package-Manager: Portage-2.3.8, Repoman-2.3.1

media-gfx/slic3r/files/slic3r-1.2.9-c++11.patch

@@ -0,0 +1,38 @@
+--- a/xs/src/libslic3r/Config.hpp	2015-06-17 04:38:28.000000000 -0400
++++ b/xs/src/libslic3r/Config.hpp	2017-09-27 10:59:26.527103728 -0400
+@@ -65,7 +65,7 @@
+
+     bool deserialize(std::string str) {
+         std::istringstream iss(str);
+-        return iss >> this->value;
++        return static_cast<bool>(iss >> this->value);
+     };
+ };
+
+@@ -124,7 +124,7 @@
+
+     bool deserialize(std::string str) {
+         std::istringstream iss(str);
+-        return iss >> this->value;
++        return static_cast<bool>(iss >> this->value);
+     };
+ };
+
+@@ -249,7 +249,7 @@
+     bool deserialize(std::string str) {
+         // don't try to parse the trailing % since it's optional
+         std::istringstream iss(str);
+-        return iss >> this->value;
++        return static_cast<bool>(iss >> this->value);
+     };
+ };
+
+@@ -279,7 +279,7 @@
+     bool deserialize(std::string str) {
+         this->percent = str.find_first_of("%") != std::string::npos;
+         std::istringstream iss(str);
+-        return iss >> this->value;
++        return static_cast<bool>(iss >> this->value);
+     };
+ };
+

media-gfx/slic3r/slic3r-1.2.9-r2.ebuild

@@ -1,4 +1,4 @@
-# Copyright 1999-2016 Gentoo Foundation
+# Copyright 1999-2017 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=6
@@ -64,6 +64,7 @@ S="${WORKDIR}/Slic3r-${PV}/xs"
 src_prepare() {
 	pushd "${WORKDIR}/Slic3r-${PV}" || die
 	eapply "${FILESDIR}/${P}-adjust_var_path.patch"
+	eapply "${FILESDIR}/${P}-c++11.patch"
 	eapply_user
 	popd || die
 }