https://github.com/openzim/libzim/issues/757
Index: meson.build
--- meson.build.orig
+++ meson.build
@@ -1,7 +1,7 @@
 project('libzim', ['c', 'cpp'],
   version : '8.2.1',
   license : 'GPL2',
-  default_options : ['c_std=c11', 'cpp_std=c++11'])
+  default_options : ['c_std=c11', 'cpp_std=c++14'])
 
 if build_machine.system() != 'windows'
   add_project_arguments('-D_LARGEFILE64_SOURCE=1', '-D_FILE_OFFSET_BITS=64', language: 'cpp')