This is especially needed when building Emacs, as it uses
‘AM_V_GEN=@$(info GEN $@)', which means the GEN line is output by
GNU make just before the recipe runs, regardless of where AM_V_GEN
appears in the recipe. And it’s also good practice even if the
default Automake ‘AM_V_GEN=@echo GEN $@;’ is used, as it’s better
to output the GEN line consistently at the start of every recipe,
even if this precedes a preparatory command that almost always
works silently.
* modules/arpa_inet, modules/dynarray, modules/net_if:
* modules/netinet_in, modules/scratch_buffer, modules/selinux-h:
* modules/sys_file, modules/sys_ioctl, modules/sys_random:
* modules/sys_resource, modules/sys_select, modules/sys_socket:
* modules/sys_stat, modules/sys_time, modules/sys_times:
* modules/sys_types, modules/sys_uio, modules/sys_utsname:
* modules/sys_wait, modules/unicase/special-casing, top/maint.mk:
Use AM_V_GEN only at the start of each recipe.