Bump minimum std-version to 17, fixing FTBFS with new gcc-15 and googletest

Author: Gianfranco Costamagna

CMakeLists.txt

@@ -47,7 +47,7 @@ include(dependencies)
 include(Lucene++Docs)
 
 # Enable C++11
-set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 ####################################

src/test/gtest/CMakeLists.txt

@@ -11,9 +11,9 @@ project(googletest-distribution)
 set(GOOGLETEST_VERSION 1.10.0)
 
 if (CMAKE_VERSION VERSION_LESS "3.1")
-  add_definitions(-std=c++11)
+  add_definitions(-std=c++17)
 else()
-  set(CMAKE_CXX_STANDARD 11)
+  set(CMAKE_CXX_STANDARD 17)
   set(CMAKE_CXX_STANDARD_REQUIRED ON)
   if(NOT CYGWIN)
     set(CMAKE_CXX_EXTENSIONS OFF)