ardour: bump c++ standard to c++17

Fixes a build issue with boost.

Additionally, C++11 will no longer be supported starting with Ardour 9.0.

andre 1586c4b1 5d3221fd

Changed files
+1 -1
pkgs
applications
audio
ardour
+1 -1
pkgs/applications/audio/ardour/default.nix
···
] ++ lib.optionals videoSupport [ harvid xjadeo ];
wafConfigureFlags = [
-
"--cxx11"
+
"--cxx17"
"--docs"
"--freedesktop"
"--no-phone-home"