From: Sadoon Albader <sadoon@soulserv.xyz>
Date: Fri, 8 Sep 2023 14:48:42 +0000 (+0300)
Subject: optionally support parallel building
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=44fa24c3d83a5f04f709a75bcb2e2079f0f26be9;p=microwatt.git

optionally support parallel building
---

diff --git a/Makefile b/Makefile
index cca51a6..2d764b5 100644
--- a/Makefile
+++ b/Makefile
@@ -11,6 +11,9 @@ endif
 CFLAGS=-O3 -Wall $(CFLAG_ARCH_OPT) -mtune=native
 CXXFLAGS=-g -g
 
+# Use this for parallel builds
+JOBS= $(shell nproc)
+
 GHDLSYNTH ?= ghdl.so
 YOSYS     ?= yosys
 NEXTPNR   ?= nextpnr-ecp5
@@ -257,7 +260,6 @@ microwatt.json: $(synth_files) $(RAM_INIT_FILE)
 microwatt.v: $(synth_files) $(RAM_INIT_FILE)
 	$(YOSYS) -m $(GHDLSYNTH) -p "ghdl --std=08 --no-formal $(GHDL_IMAGE_GENERICS) $(GHDL_TARGET_GENERICS) $(synth_files) -e toplevel; write_verilog $@"
 
-THREADS=1 # How many threads should be used for verilator binary
 THREADS=3 # How many threads should be used for verilator binary, 3 is optimal
 # Need to investigate why yosys is hitting verilator warnings, and eventually turn on -Wall
 # --top-module toplevel
@@ -284,7 +286,7 @@ microwatt-verilator: microwatt.v verilator/microwatt-verilator.cpp verilator/uar
 	#    --output-split 5000 \
 	#    --output-split-cfuncs 500 \
 	#    --output-split-ctrace 500 \
-	make -C obj_dir -f Vmicrowatt.mk
+	make -j $(JOBS) -C obj_dir -f Vmicrowatt.mk
 	@cp -f obj_dir/microwatt-verilator microwatt-verilator
 
 microwatt_out.config: microwatt.json $(LPF)