antimake: use JoinPath when calculating feat file name

diff --git a/mk/antimake.mk b/mk/antimake.mk
index 0daebd99ed0cc7ed9e1f6a57fd7b7fbd225f103c..27612d28122774b5604796ec80936b8d7adc2e5b 100755 (executable)
--- a/mk/antimake.mk
+++ b/mk/antimake.mk
@@ -1195,7 +1195,7 @@ AM_FLAGS += real
 amdir = $(dir $(realpath $(filter %/antimake.mk antimake.mk,$(MAKEFILE_LIST))))
 
 # 1-feat name
-FeatFile = $(amdir)/amext-$(1).mk
+FeatFile = $(call JoinPath,$(amdir),amext-$(1).mk)
 
 
 # 1- fname