From ecb60f6e43092e9816c0f2ab231a250c55927a7a Mon Sep 17 00:00:00 2001
From: Florent Kermarrec <florent@enjoy-digital.fr>
Date: Fri, 7 Jun 2019 11:16:39 +0200
Subject: [PATCH] build/sim: use -O0 for verilator compilation

In most of the case, execution speed is already fast enough with -O0 and
with complex design -O0 is a lost faster to compile than -O3. In the future
we could add a switch to choose which optimization we want.
---
 litex/build/sim/core/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/litex/build/sim/core/Makefile b/litex/build/sim/core/Makefile
index 3737af823..149789d8c 100644
--- a/litex/build/sim/core/Makefile
+++ b/litex/build/sim/core/Makefile
@@ -1,7 +1,7 @@
 include variables.mak
 
 CC = gcc
-CFLAGS = -Wall -O3 -ggdb $(if $(COVERAGE), -DVM_COVERAGE)
+CFLAGS = -Wall -O0 -ggdb $(if $(COVERAGE), -DVM_COVERAGE)
 LDFLAGS = -lpthread -ljson-c -lm -lstdc++ -ldl -levent
 
 CC_SRCS ?= "--cc dut.v"