From 6766932b35a9d35c1510a68ef708b53b4abab0bf Mon Sep 17 00:00:00 2001
From: bartus <szczepaniak.bartek+github@gmail.com>
Date: Sun, 3 Oct 2021 14:20:19 +0200
Subject: [PATCH] Fix linux build: undefined std:string_view

Pop 'mesh' library c++ stranderd to c++17
Add required <string_view> header
---
 src/Mod/Mesh/App/CMakeLists.txt  | 2 ++
 src/Mod/Mesh/App/Core/MeshIO.cpp | 1 +
 src/Mod/PartDesign/App/json.hpp  | 1 +
 3 files changed, 4 insertions(+)

diff --git a/src/Mod/Mesh/App/CMakeLists.txt b/src/Mod/Mesh/App/CMakeLists.txt
index 2d661aea12..c987d475f1 100644
--- a/src/Mod/Mesh/App/CMakeLists.txt
+++ b/src/Mod/Mesh/App/CMakeLists.txt
@@ -399,6 +399,8 @@ endif ()
 
 add_library(Mesh SHARED ${Core_SRCS} ${WildMagic4_SRCS} ${Mesh_SRCS})
 target_link_libraries(Mesh ${Mesh_LIBS})
+set_target_properties(Mesh PROPERTIES CXX_STANDARD_REQUIRED ON)
+set_target_properties(Mesh PROPERTIES CXX_STANDARD 17)
 
 
 SET_BIN_DIR(Mesh Mesh /Mod/Mesh)
diff --git a/src/Mod/Mesh/App/Core/MeshIO.cpp b/src/Mod/Mesh/App/Core/MeshIO.cpp
index 2c1655a588..09d1ad91dc 100644
--- a/src/Mod/Mesh/App/Core/MeshIO.cpp
+++ b/src/Mod/Mesh/App/Core/MeshIO.cpp
@@ -46,6 +46,7 @@
 #include <sstream>
 #include <iomanip>
 #include <algorithm>
+#include <string_view>
 #include <boost/regex.hpp>
 #include <boost/algorithm/string.hpp>
 #include <boost/lexical_cast.hpp>
diff --git a/src/Mod/PartDesign/App/json.hpp b/src/Mod/PartDesign/App/json.hpp
index 1c15051070..fb83a5cca0 100644
--- a/src/Mod/PartDesign/App/json.hpp
+++ b/src/Mod/PartDesign/App/json.hpp
@@ -43,6 +43,7 @@ SOFTWARE.
 #include <memory> // unique_ptr
 #include <numeric> // accumulate
 #include <string> // string, stoi, to_string
+#include <string_view> // string_view
 #include <utility> // declval, forward, move, pair, swap
 #include <vector> // vector