Hey man,
I know how you feel. I was in that exact same position half a year ago or so...took me almost a week to stabalize how I write the makefiles for NIOS uClinux app. Anyway, here it is, the complete makefile that would work for any NIOS Linux app ported from Microtronix. Just study it, and ask questions if you have any. It might be helpful if you have the old Rules.mak to compare the changes I made.
There are two files, Makefile and Rules.mak
First, Rules.mak
########################################################################### Variables and Rules for building Nios II Linux applications# # This file is a "template" that is copied over from the Nios II Linux# Application plug-in. This file should be included within your top-level# Makefile.
# This turns on various levels of hardware multiply support# Set the following option to none, mul, or mulx# none := no hardware multiplication support at all# mul := supports use of the mul assembler instruction# mulx := supports use of the mul and mulx assembler instruction
ifeq "$(HW_MUL_SUPPORT)" ""
HW_MUL_SUPPORT := mulx
endif
# # Warn users if external variables have not yet been defined.#
ifeq "$(origin UTILSDIR)" "undefined"
$(warning The location of the utiltiies directory is undefined)
endif
ifeq "$(origin LIBCDIR)" "undefined"
$(warning The location of uClibc is undefined)
endif
# # Path + Name of necessary executables#
EXECSUFFIX := .exe
CROSS := nios2-elf-
CC := $(CROSS)gcc
CPP := $(CROSS)g++
AR := $(CROSS)ar
LD := $(CROSS)ld
NM := $(CROSS)nm
RANLIB := $(CROSS)ranlib
STRIPTOOL := $(CROSS)strip
ELF2FLT := $(UTILSDIR)/bin/elf2flt
# # Location of important files#
CRT0 := $(LIBCDIR)/lib/crt0.o
LIBC := $(LIBCDIR)/lib/libc.a
LIBM := $(LIBCDIR)/lib/libm.a
LIBGCC := $(shell $(CC) -print-file-name=libgcc.a)
LIBGCCDIR := $(dir $(LIBGCC))
LINKSCRIPT := $(UTILSDIR)/scripts/elf2flt.ld
# # Various flags, modifications are not recommended and not necessarily# supported.# # DEPFLAGS:# -MM : ignore system includes, # -M : include system includes in the dependency#
WARNING_FLAGS := -Wall
# basic C flags to pass to the compiler
CFLAGS += -nostdinc -D__linux__
# if DEBUG is turned on, then turn off optimizations and turn on symbol# generation, else turn on level 2 optimizations
ifeq '$(DEBUG)' '1'
CFLAGS += -O0 -g
else
CFLAGS += -O2
endif
# pass any additional include directories to the compiler while building the# application
CFLAGS += -I$(LIBCDIR)/include -I$(LIBGCCDIR)include
# Temporary workaround for nios2-elf-gcc bug# First noticed in v3.4.1 (Altera Nios II 1.1 b131)# To be removed at a later date when bug is resolved.
CFLAGS += -fno-optimize-sibling-calls
# Turn on the various levels of hardware multiplication support.
ifeq ($(strip $(HW_MUL_SUPPORT)),none)
CFLAGS += -mno-hw-mul -mno-hw-mulx
endif
ifeq ($(strip $(HW_MUL_SUPPORT)),mul)
CFLAGS += -mhw-mul -mno-hw-mulx
endif
ifeq ($(strip $(HW_MUL_SUPPORT)),mulx)
CFLAGS += -mhw-mul -mhw-mulx
endif
mulx_help_text := $(shell $(CC) --target-help | grep mulx)
ifeq "$(mulx_help_text)" ""
CFLAGS := $(filter-out -mhw-mulx -mno-hw-mulx, $(CFLAGS))
endif
DEPFLAGS = -E -MM
LDFLAGS := $(LDFLAGS) -msys-crt0=$(CRT0) -r -d -L$(LIBCDIR)/lib
LDLIBS := $(LDLIBS) $(LIBM) $(LIBGCC) $(LIBC)
# relocate the absolute elf file if requested
ifneq ($(TEXT),)
TEXT_LOC_OPT := -Ttext $(TEXT)
endif
ifneq ($(DATA),)
DATA_LOC_OPT := -Tdata $(DATA)
endif
ifneq ($(BSS),)
BSS_LOC_OPT := -Tbss $(BSS)
endif
Second, Makefile
#--------------------------------------# Target File Name and Type Definitions# --------------------------------------# DEBUG = 1 to turn on debugging support
PROJ_NAME = UsbPerf
PROGS := UsbPerf.exe
DEBUG = 0
INSTALL_DIR = Build
OBJECT_DIR = .
LIBRARY_DIR = .
EXECUTABLE_DIR = .
MISER_SHARED_DIR = ../MISER_SHARED
BITTWARE_LIB = $(MISER_SHARED_DIR)/Utilities/Bittware/Nios/Lib/libMiser.a
# ------------------------------------------# Software tool and environment definitions# ------------------------------------------
TOPDIR = .
LIBCDIR = "c:/altera/kits/nios2_60/bin/eclipse/plugins/com.microtronix.nios2linux.uClibc_1.4.0"
UTILSDIR = "c:/altera/kits/nios2_60/bin/eclipse/plugins/com.microtronix.nios2linux.application_1.4.0"
# -----------------------------------------------------------# Compilation Flags (Probably will never need to be changed)# -----------------------------------------------------------
CFLAGS =
# -------------------------------------------------------# Linking Flags (Probably will never need to be changed)# -------------------------------------------------------
LDFLAGS =
# --------------------------------------------------------------# Linking Libraries (Specify the uClibc-specific libraries here# --------------------------------------------------------------
LDLIBS = $(BITTWARE_LIB) -lpthread -lrt
# ---------------------------------------# Target compile time symbol definitions# ---------------------------------------
DEFINES = -DUSING_DSP_EMULATOR -DMISER_SCH_BLD
# ---------------------# Program's Stack Size# ---------------------
FLTFLAGS := -s 32768
# ------------------------------------------------------------------------# Rules.mak adds Nios-specific flags to the compilation and linking flags# ------------------------------------------------------------------------
include $(TOPDIR)/Rules.mak
# --------------# Object Files# --------------
Main_OBJ = threadTest.o
# ------------------------------------------# Include Paths# ------------------------------------------
INCLUDES = -I .
-I $(MISER_SHARED_DIR)/Utilities/Bittware/Nios/Inc
-I ../SHARED_PROG
# ----------------------------------------------# Source Paths# ----------------------------------------------
Main_PATH = .
# ----------------------# Compilation shortcut# ----------------------
GPP_COMPILE = $(CPP) $(CFLAGS) $(INCLUDES) $(DEFINES)
GPP_LINK = $(CPP) $(LDFLAGS)
GCC_COMPILE = $(CC) $(CFLAGS) $(INCLUDES) $(DEFINES)
GCC_LINK = $(CC) $(LDFLAGS)
COMPILE_Main_Src = $(GPP_COMPILE) -c $(Main_PATH)/$(addsuffix .cpp, $(basename $@)) -o $(OBJECT_DIR)/$@ $<
LINK_PROG = $(GPP_LINK)
# ----------------------# Actual Compilation# ----------------------
ALL_OBJS := $(Main_OBJ)
FINAL_OBJS := $(foreach OBJECT, $(ALL_OBJS), $(addprefix $(OBJECT_DIR)/, $(OBJECT)))
# --------------------# Files to be Created# --------------------
PROGS_BIN = $(PROGS:.exe=.bin)
PROGS_ELF = $(PROGS:.exe=.elf)
PROGS_FLT = $(PROGS:.exe=.flt)
ifeq '$(DEBUG)' '1'
PROGS_GDB = $(PROGS:.exe=.gdb)
endif
# -------------------# Actual Compilation# -------------------# Command to compile all files but doesnt link
all: $(PROGS)
# Linking
$(PROGS_BIN): $(Main_OBJ)
$(LINK_PROG) -o $(EXECUTABLE_DIR)/$(PROGS_BIN) $(FINAL_OBJS) $(LDLIBS)
@echo "=================="
@echo "Linking Successful"
@echo "=================="
# Debug file
$(PROGS_GDB): $(PROGS_BIN)
$(LD) -T $(LINKSCRIPT) -o $(EXECUTABLE_DIR)/$(PROGS_GDB) $(EXECUTABLE_DIR)/$(PROGS_BIN)
@echo "============="
@echo "GDB Completed"
@echo "============="
# ELF file
$(PROGS_ELF): $(PROGS_BIN)
$(LD) -T $(LINKSCRIPT) -Ur -o $(EXECUTABLE_DIR)/$(PROGS_ELF) $(EXECUTABLE_DIR)/$(PROGS_BIN)
@echo "============="
@echo "ELF Completed"
@echo "============="
# FLT file
$(PROGS_FLT): $(PROGS_ELF)
$(ELF2FLT) $(FLTFLAGS) -o $(EXECUTABLE_DIR)/$(PROGS_FLT) $(EXECUTABLE_DIR)/$(PROGS_ELF)
@echo "============="
@echo "FLT Completed"
@echo "============="
# Executable
$(PROGS): $(PROGS_FLT) $(PROGS_GDB)
cp -f $(EXECUTABLE_DIR)/$(PROGS_FLT) $(EXECUTABLE_DIR)/$(PROGS)
@echo "================================="
@echo "Executable Successfully Generated"
@echo "================================="
# Compilation commands
$(Main_OBJ): $<$(addsuffix .cpp, $(basename $@))
$(COMPILE_Main_Src)
# ------------------------# Cleanup# ------------------------
clean:
@rm -f *.o *.gdb *.flt *.exe *elf *.bin
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