From 90fe5850033c7cfb72387458dc272871663bfa83 Mon Sep 17 00:00:00 2001
From: Mariusz Glebocki <mglebocki@antmicro.com>
Date: Mon, 3 Feb 2020 21:48:51 +0100
Subject: [PATCH] build/sim: allow to use environment's {C,LD}FLAGS

There are use cases where additional flags should be added to CFLAGS or
LDFLAGS, e.g. when using Conda environment.
---
 litex/build/sim/core/Makefile              | 6 +++---
 litex/build/sim/core/modules/variables.mak | 6 +++---
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/litex/build/sim/core/Makefile b/litex/build/sim/core/Makefile
index c486e778..b1c88028 100644
--- a/litex/build/sim/core/Makefile
+++ b/litex/build/sim/core/Makefile
@@ -1,8 +1,8 @@
 include variables.mak
 
-CC = gcc
-CFLAGS = -Wall -$(OPT_LEVEL) -ggdb $(if $(COVERAGE), -DVM_COVERAGE)
-LDFLAGS = -lpthread -Wl,--no-as-needed -ljson-c -lm -lstdc++ -Wl,--no-as-needed -ldl -levent
+CC ?= gcc
+CFLAGS += -Wall -$(OPT_LEVEL) -ggdb $(if $(COVERAGE), -DVM_COVERAGE)
+LDFLAGS += -lpthread -Wl,--no-as-needed -ljson-c -lm -lstdc++ -Wl,--no-as-needed -ldl -levent
 
 CC_SRCS ?= "--cc dut.v"
 
diff --git a/litex/build/sim/core/modules/variables.mak b/litex/build/sim/core/modules/variables.mak
index 76441764..6c504f3c 100644
--- a/litex/build/sim/core/modules/variables.mak
+++ b/litex/build/sim/core/modules/variables.mak
@@ -1,5 +1,5 @@
-CC = gcc
-CFLAGS = -Wall -O3 -ggdb -fPIC -Werror
-LDFLAGS = -levent -shared -fPIC
+CC ?= gcc
+CFLAGS += -Wall -O3 -ggdb -fPIC -Werror
+LDFLAGS += -levent -shared -fPIC
 
 OBJ_DIR ?= .
-- 
2.30.2