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54 lines
1.8 KiB
Makefile
54 lines
1.8 KiB
Makefile
#
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# Authors: Wolfgang Spraul <wolfgang@sharism.cc>
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version
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# 3 of the License, or (at your option) any later version.
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#
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ifeq ($(CROSS_COMPILE),)
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$(error CROSS_COMPILE variable not set, should point to .../mipsel-openwrt-linux-)
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endif
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CC = $(CROSS_COMPILE)gcc
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AR = $(CROSS_COMPILE)ar rcsv
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LD = $(CROSS_COMPILE)ld
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OBJCOPY = $(CROSS_COMPILE)objcopy
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NM = $(CROSS_COMPILE)nm
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OBJDUMP = $(CROSS_COMPILE)objdump
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DEBUG_CFLAGS = -g -Wa,-a=$(basename $@).lst
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# Wolfgang saw data corruptions in stage2 when dealing with ECC data on random writes
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# to NAND. Disabling the unit-at-a-time optimization reproducibly fixed the bug.
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# The compiler may be optimizing in a way that conflicts with how the hardware ECC
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# registers work. Since other register accesses might be affected too it seems the best
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# is to disable this optimization right now.
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CFLAGS = -mips32 -O2 -fno-exceptions -fno-unit-at-a-time -fno-zero-initialized-in-bss \
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-ffunction-sections -fomit-frame-pointer -msoft-float -G 0 $(DEBUG_CFLAGS) -fPIC
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LDFLAGS = -nostdlib -T target.ld $(CFLAGS)
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LIBS = -lstdc++ -lc -lm -lgcc
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VPATH = ../target-common
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OBJS = echo-kernel.o serial.o
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all: echo-kernel.elf
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$(OBJCOPY) -O binary echo-kernel.elf echo-kernel.bin
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$(OBJDUMP) -D echo-kernel.elf > echo-kernel.dump
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$(NM) echo-kernel.elf | sort > echo-kernel.sym
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$(OBJDUMP) -h echo-kernel.elf > echo-kernel.map
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echo-kernel.elf: head.o $(OBJS)
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$(CC) $(LDFLAGS) $^ -o $@
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.c.o:
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$(CC) $(CFLAGS) -o $@ -c $<
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.cpp.o:
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$(CC) $(CFLAGS) -fno-rtti -fvtable-gc -o $@ -c $<
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.S.o:
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$(CC) $(CFLAGS) -o $@ -c $<
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clean:
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rm -f $(addprefix echo-kernel., bin dump elf map sym)
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rm -f head.o head.lst $(OBJS) $(OBJS:.o=.lst)
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