Build with C++17 (Closes: #1092322)

debian/patches/series

 fix994824.patch
+stdc++17.diff

debian/patches/stdc++17.diff

+From: Matthias Klose <doko@ubuntu.com>
+Date: 2025-03-19
+Subject: Build with C++17
+Forwarded: no
+
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -53,13 +53,13 @@ if ( SLOP_OPENGL )
+ endif()
+ 
+ set_property(TARGET ${LIBRARY_NAME} PROPERTY CXX_STANDARD_REQUIRED ON)
+-set_property(TARGET ${LIBRARY_NAME} PROPERTY CXX_STANDARD 11)
++set_property(TARGET ${LIBRARY_NAME} PROPERTY CXX_STANDARD 17)
+ set_property(TARGET ${LIBRARY_NAME} PROPERTY CXX_EXTENSIONS OFF)
+ 
+ add_executable(${EXECUTABLE_NAME} src/main.cpp)
+ 
+ set_property(TARGET ${EXECUTABLE_NAME} PROPERTY CXX_STANDARD_REQUIRED ON)
+-set_property(TARGET ${EXECUTABLE_NAME} PROPERTY CXX_STANDARD 11)
++set_property(TARGET ${EXECUTABLE_NAME} PROPERTY CXX_STANDARD 17)
+ set_property(TARGET ${EXECUTABLE_NAME} PROPERTY CXX_EXTENSIONS OFF)
+ 
+ set( CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/modules" )
+