Use 4 threads and LTO

Signed-off-by: Maciej Dudek <[email protected]>
antmicro · Nov 10, 2022 · 478357c · 478357c
1 parent ad89654
commit 478357c
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Showing 2 changed files with 5 additions and 4 deletions.
diff --git a/litex/build/sim/core/Makefile b/litex/build/sim/core/Makefile
@@ -7,8 +7,8 @@ ifeq ($(UNAME_S),Darwin)
 	LDFLAGS += -lpthread -ljson-c -lz -lm -lstdc++ -ldl -levent
 else
 	CC ?= gcc
-	CFLAGS += -ggdb
-	LDFLAGS += -lpthread -Wl,--no-as-needed -ljson-c -lz -lm -lstdc++ -Wl,--no-as-needed -ldl -levent
+	CFLAGS += -ggdb -flto
+	LDFLAGS += -lpthread -Wl,--no-as-needed -ljson-c -lz -lm -lstdc++ -Wl,--no-as-needed -ldl -levent -flto
 endif
 
 CFLAGS += -Wall -$(OPT_LEVEL) $(if $(COVERAGE), -DVM_COVERAGE) $(if $(TRACE_FST), -DTRACE_FST)
@@ -50,6 +50,7 @@ sim: $(OBJS_SIM) | mkdir
 		--output-split 5000 \
 		--output-split-cfuncs 500 \
 		--output-split-ctrace 500 \
+		--threads 4 \
 		$(INC_DIR) \
 		-Wno-BLKANDNBLK \
 		-Wno-WIDTH \

diff --git a/litex/build/sim/core/modules/rules.mak b/litex/build/sim/core/modules/rules.mak
@@ -6,9 +6,9 @@ ifeq ($(UNAME_S),Darwin)
     LDFLAGS += -L/usr/local/lib -ljson-c
     CFLAGS += -Wall -O3 -ggdb -fPIC
 else
-    CFLAGS += -Wall -O3 -ggdb -fPIC -Werror
+    CFLAGS += -Wall -O3 -ggdb -fPIC -Werror -flto
 endif
-LDFLAGS += -levent -shared -fPIC
+LDFLAGS += -levent -shared -fPIC -flto
 
 MOD_SRC_DIR=$(SRC_DIR)/modules/$(MOD)
 EXTRA_MOD_SRC_DIR=$(EXTRA_MOD_BASE_DIR)/$(MOD)