From b455a816781d05bd4779fba57df0d7e444aeadc2 Mon Sep 17 00:00:00 2001
From: Dolu1990 <charles.papon.90@gmail.com>
Date: Tue, 30 Jun 2020 10:38:26 +0200
Subject: [PATCH] Improve verilator compilation speed

by asking verilator to split the C++ model into multiple files.
---
 litex/build/sim/core/Makefile | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/litex/build/sim/core/Makefile b/litex/build/sim/core/Makefile
index 5615fe3d3..f14398248 100644
--- a/litex/build/sim/core/Makefile
+++ b/litex/build/sim/core/Makefile
@@ -45,6 +45,9 @@ sim: $(OBJS_SIM) | mkdir
 		$(if $(TRACE_FST), --trace-fst,) \
 		$(if $(COVERAGE), --coverage,) \
 		--unroll-count 256 \
+		--output-split 5000 \
+		--output-split-cfuncs 500 \
+		--output-split-ctrace 500 \
 		$(INC_DIR) \
 		-Wno-BLKANDNBLK \
 		-Wno-WIDTH