From eb2c50b135eed62b6a6a7f5a50202310ae60ed55 Mon Sep 17 00:00:00 2001
From: tux3 <barrdetwix@gmail.com>
Date: Fri, 31 May 2019 10:44:05 +0200
Subject: [PATCH] ice40: Warn that trailing PCF settings are ignored

---
 ice40/pcf.cc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/ice40/pcf.cc b/ice40/pcf.cc
index a8273dd6..15132800 100644
--- a/ice40/pcf.cc
+++ b/ice40/pcf.cc
@@ -77,8 +77,11 @@ bool apply_pcf(Context *ctx, std::string filename, std::istream &in)
                     }
                     args_end++;
                 }
-                if (args_end >= words.size() - 1)
+                if (args_end > words.size() - 2)
                     log_error("expected PCF syntax 'set_io cell pin' (on line %d)\n", lineno);
+                else if (args_end < words.size() - 2 && !nowarn)
+                    log_warning("Ignoring trailing PCF settings (on line %d)\n", lineno);
+
                 std::string cell = words.at(args_end);
                 std::string pin = words.at(args_end + 1);
                 auto fnd_cell = ctx->cells.find(ctx->id(cell));