build system: avoid warning about missing .xcompile

That file will be generated, but not before make managed
to complain about it.
So let's just generate it if missing - it won't hurt the
dependency tracking some lines later which is looking at
time stamps.

Change-Id: I615f38457eb27a8ffb4352b5234e262ee95d84ac
Signed-off-by: Patrick Georgi <>
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <>
diff --git a/Makefile b/Makefile
index fad8103..a55ad67 100644
--- a/Makefile
+++ b/Makefile
@@ -30,6 +30,10 @@
+# in addition to the dependency below, create the file if it doesn't exist
+# to silence stupid warnings about a file that would be generated anyway.
+$(if $(wildcard .xcompile),,$(eval $(shell util/xcompile/xcompile $(XGCCPATH) > .xcompile)))
 .xcompile: util/xcompile/xcompile
 	A=`mktemp $@.XXXXXX`; $< $(XGCCPATH) > $$A && mv $$A $@ 2> /dev/null