test: let's start getting ready for 2020

It'll be a wonderful year, I'm sure.

diff --git a/src/systemd/meson.build b/src/systemd/meson.build
index 5a8f1abcf6d9f29726c31c00286bdf5f062707c8..c9c484b411407eafea97be39690c854b2fba9029 100644 (file)
--- a/src/systemd/meson.build
+++ b/src/systemd/meson.build
@@ -64,6 +64,9 @@ if add_languages('cpp', required : false)
         if cxx.has_argument('-std=c++17')
                 opts += [['c++', '-std=c++17']]
         endif
+        if cxx.has_argument('-std=c++20')
+                opts += [['c++', '-std=c++20']]
+        endif
 endif
 
 foreach header : _systemd_headers + _not_installed_headers + [libudev_h_path]