variables.mk: PLATFORM_DIR can be provided from some non-ORFS location

Signed-off-by: Øyvind Harboe <[email protected]>

Author: oharboe

flow/scripts/variables.mk

@@ -37,14 +37,16 @@ ifeq ($(origin DESIGN_NAME), undefined)
   $(error DESIGN_NAME variable net set.)
 endif
 
-ifneq ($(wildcard $(PLATFORM_HOME)/$(PLATFORM)),)
-  export PLATFORM_DIR = $(PLATFORM_HOME)/$(PLATFORM)
-else ifneq ($(findstring $(PLATFORM),$(PUBLIC)),)
-  export PLATFORM_DIR = ./platforms/$(PLATFORM)
-else ifneq ($(wildcard ../../$(PLATFORM)),)
-  export PLATFORM_DIR = ../../$(PLATFORM)
-else
-  $(error [ERROR][FLOW] Platform '$(PLATFORM)' not found.)
+ifeq ($(PLATFORM_DIR),)
+  ifneq ($(wildcard $(PLATFORM_HOME)/$(PLATFORM)),)
+    export PLATFORM_DIR = $(PLATFORM_HOME)/$(PLATFORM)
+  else ifneq ($(findstring $(PLATFORM),$(PUBLIC)),)
+    export PLATFORM_DIR = ./platforms/$(PLATFORM)
+  else ifneq ($(wildcard ../../$(PLATFORM)),)
+    export PLATFORM_DIR = ../../$(PLATFORM)
+  else
+    $(error [ERROR][FLOW] Platform '$(PLATFORM)' not found.)
+  endif
 endif
 
 include $(PLATFORM_DIR)/config.mk