From eab9f4d6846eefb0bf791162705c7a559793da1c Mon Sep 17 00:00:00 2001
From: Tristan Gingold <tgingold@free.fr>
Date: Sun, 3 Oct 2021 10:05:22 +0200
Subject: ghdl.cc: display compile date and git hash

---
 Makefile    | 4 +++-
 src/ghdl.cc | 5 +++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index a384ecf..589a5b0 100644
--- a/Makefile
+++ b/Makefile
@@ -15,13 +15,15 @@ ALL_LDFLAGS=$(LIBGHDL_LIB) -Wl,-rpath,$(dir $(LIBGHDL_LIB)) $(LDFLAGS)
 
 ALL_CFLAGS=-fPIC -DYOSYS_ENABLE_GHDL -I$(LIBGHDL_INC) $(CFLAGS)
 
+VER_HASH=$(shell git rev-parse --short HEAD || echo "unknown")
+
 all: ghdl.$(SOEXT)
 
 ghdl.$(SOEXT): ghdl.o
 	$(YOSYS_CONFIG) --build $@ $< -shared $(ALL_LDFLAGS)
 
 ghdl.o: src/ghdl.cc
-	$(YOSYS_CONFIG) --exec --cxx -c --cxxflags -o $@ $< $(ALL_CFLAGS)
+	$(YOSYS_CONFIG) --exec --cxx -c --cxxflags -o $@ $< $(ALL_CFLAGS) -DGHDL_VER_HASH="\"$(VER_HASH)\""
 
 clean: force
 	$(RM) -f ghdl.$(SOEXT) ghdl.o
diff --git a/src/ghdl.cc b/src/ghdl.cc
index 7b36042..3d5bfc4 100644
--- a/src/ghdl.cc
+++ b/src/ghdl.cc
@@ -1272,6 +1272,11 @@ struct GhdlPass : public Pass {
 
 		if (args.size() == 2 && args[1] == "--disp-config") {
 			ghdlcomp__disp_config();
+			log("yosys plugin compiled on " __DATE__ " " __TIME__
+#ifdef GHDL_VER_HASH
+			    ", git hash:" GHDL_VER_HASH
+#endif
+			    "\n");
 		}
 		else {
 			int cmd_argc = args.size() - 1;
-- 
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