From 54d75e8cfec1957778f159876047dbdc476fac84 Mon Sep 17 00:00:00 2001
From: Eddie Hung <eddieh@ece.ubc.ca>
Date: Thu, 7 Feb 2019 14:23:16 -0800
Subject: Better error messaging for empty/invalid NPNR

---
 ice40/regressions/Makefile | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'ice40/regressions/Makefile')

diff --git a/ice40/regressions/Makefile b/ice40/regressions/Makefile
index b1f81b6..82f0510 100644
--- a/ice40/regressions/Makefile
+++ b/ice40/regressions/Makefile
@@ -9,6 +9,15 @@ SH_OUTPUT := $(patsubst %.sh,%.log,$(SH))
 
 all: $(JSON_OUTPUT) $(SH_OUTPUT)
 
+ifeq ($(NPNR),)
+	$(error "$$(NPNR) must point to a nextpnr-ice40 binary (currently: empty)")
+endif
+
+$(NPNR):
+ifeq ($(wildcard $(NPNR)),)
+	$(error "$$(NPNR) must point to a nextpnr-ice40 binary (currently: $@)")
+endif
+
 $(JSON_OUTPUT): %.log: %.json $(wildcard %.pcf) $(wildcard %.npnr) $(NPNR)
 	$(NPNR) --json $(word 1,$^) $(if $(wildcard $*.pcf),--pcf $*.pcf,) $(if $(wildcard $*.npnr),$(shell cat $*.npnr),) > $@ 2>&1
 
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