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ar71xx: lzma loader use LTO

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Change the Makefile to use LTO for better code optimisations. Gains are
very low, only 270 bytes saved, but it's only Makefile changes.

Signed-off-by: Julien Dusser <julien.dusser@free.fr>
This commit is contained in:
Julien Dusser 2017-07-19 15:45:08 +02:00 committed by Felix Fietkau
parent 8c5702f2a0
commit 8d9ff6b6f7
1 changed files with 5 additions and 3 deletions
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8
target/linux/ar71xx/image/lzma-loader/src/Makefile
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@ -37,11 +37,13 @@ CFLAGS = -D__KERNEL__ -Wall -Wstrict-prototypes -Wno-trigraphs -Os \
-mabi=32 -march=mips32r2 \ -mabi=32 -march=mips32r2 \
-Wa,-32 -Wa,-march=mips32r2 -Wa,-mips32r2 -Wa,--trap -Wa,-32 -Wa,-march=mips32r2 -Wa,-mips32r2 -Wa,--trap
CFLAGS += -D_LZMA_PROB32 CFLAGS += -D_LZMA_PROB32
CFLAGS += -flto
ASFLAGS = $(CFLAGS) -D__ASSEMBLY__ ASFLAGS = $(CFLAGS) -D__ASSEMBLY__
LDFLAGS = -static --gc-sections -no-warn-mismatch LDFLAGS = -static -Wl,--gc-sections -Wl,-no-warn-mismatch
LDFLAGS += -e startup -T loader.lds -Ttext $(LZMA_TEXT_START) LDFLAGS += -Wl,-e,startup -T loader.lds -Wl,-Ttext,$(LZMA_TEXT_START)
LDFLAGS += -flto -fwhole-program
O_FORMAT = $(shell $(OBJDUMP) -i | head -2 | grep elf32) O_FORMAT = $(shell $(OBJDUMP) -i | head -2 | grep elf32)
@ -86,7 +88,7 @@ data.o: $(LOADER_DATA)
$(LD) -r -b binary --oformat $(O_FORMAT) -T lzma-data.lds -o $@ $< $(LD) -r -b binary --oformat $(O_FORMAT) -T lzma-data.lds -o $@ $<
loader: $(OBJECTS) loader: $(OBJECTS)
$(LD) $(LDFLAGS) -o $@ $(OBJECTS) $(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(OBJECTS)
loader.bin: loader loader.bin: loader
$(OBJCOPY) $(BIN_FLAGS) $< $@ $(OBJCOPY) $(BIN_FLAGS) $< $@