I noticed some of the projects that switched to meson haven't set and default buildtype, which means a debug build is produced. Most of the gnome projects that switched set a default buildtype to debugoptimized which is equivalent to -O2 -g (which autotools did). The book should probably set debugoptimized to the packages that don't have a default buildtype set.
These are the projects in the book without a buildtype that I could find: dconf libinput file-roller glib-networking gnome-calculator gnome-system-monitor libsoup seahorse gnome-control-center gnome-settings-daemon gnome-shell baobab epiphany nautilus -- http://lists.linuxfromscratch.org/listinfo/blfs-dev FAQ: http://www.linuxfromscratch.org/blfs/faq.html Unsubscribe: See the above information page