They are unused in this context.
gcc/ada/
* gcc-interface/Makefile.in (tmake_file): Remove all references.
host_os=@host_os@
target_cpu_default = @target_cpu_default@
xmake_file = @xmake_file@
-tmake_file = @tmake_file@
#version=`sed -e 's/.*\"\([^ \"]*\)[ \"].*/\1/' < $(srcdir)/version.c`
#mainversion=`sed -e 's/.*\"\([0-9]*\.[0-9]*\).*/\1/' < $(srcdir)/version.c`
# This tells GNU Make version 3 not to put all variables in the environment.
.NOEXPORT:
-# target overrides
-ifneq ($(tmake_file),)
-include $(tmake_file)
-endif
-
# host overrides
ifneq ($(xmake_file),)
include $(xmake_file)