[lwip-users] Makefile

[Chris Hiszpanski]

Hello,

I am building LwIP the following Makefile modeled after 
contrib/ports/unix/proj/minimal/Makefile:

# ARM microprocessor
PROC=arm

# Toolsuite object format (changing this setting will not change the object
# format. use objcopy for that purpose. the type is only used in the naming 
of
# executables to call, for instance, arm-none-eabi-gcc).
TYPE=none-eabi

# GNU LD linking script
LDSCRIPT=ldscript

# Toolsuite tool executable names
CC=$(PROC)-$(TYPE)-gcc
AS=$(PROC)-$(TYPE)-as
AR=$(PROC)-$(TYPE)-ar
LD=$(PROC)-$(TYPE)-ld
NM=$(PROC)-$(TYPE)-nm
OBJDUMP=$(PROC)-$(TYPE)-objdump

# Directory assignments
SRCDIR=src
OBJDIR=obj
LWIPDIR=$(SRCDIR)/lwip-1.1.0/src
UIDIR=$(SRCDIR)/ui
SYSDIR=$(SRCDIR)/sys

# Compiler options:
#   -gdwarf-2           Use DWARF-2 protocol for debugging information.
#   -Wall               Print all warnings.
#   -march=armv4t       Select ARM version 4 architecture.
#   -fno-builtin        Disable floating point operations.
#   -mcpu=arm7tdmi      Select ARM7TDMI processor.
#   -mlittle-endian     Select little endian byte order.
#   -O0                 Disable optimizations.
#   -g                  Enable debugging information.
CFLAGS= -gdwarf-2 -Wall -march=armv4t -fno-builtin -mcpu=arm7tdmi \
       -mlittle-endian -O0 -g -c \
       -I$(LWIPDIR)/include \
       -I$(LWIPDIR)/include/arch \
       -I$(LWIPDIR)/include/ipv4 \
       -Iinclude \
       -I/usr/local/$(PROC)-$(TYPE)/include \
       -L/usr/local/$(PROC)-$(TYPE)/lib

# Locate object files in obj directory
vpath %.o obj

# COREFILES, CORE4FILES: The minimum set of files needed for LwIP.
COREFILES=$(LWIPDIR)/core/mem.c $(LWIPDIR)/core/memp.c \
       $(LWIPDIR)/core/netif.c $(LWIPDIR)/core/pbuf.c \
       $(LWIPDIR)/core/raw.c $(LWIPDIR)/core/stats.c \
       $(LWIPDIR)/core/sys.c $(LWIPDIR)/core/tcp.c \
       $(LWIPDIR)/core/tcp_in.c $(LWIPDIR)/core/tcp_out.c \
       $(LWIPDIR)/core/udp.c $(LWIPDIR)/core/dhcp.c
CORE4FILES=$(LWIPDIR)/core/ipv4/icmp.c $(LWIPDIR)/core/ipv4/ip.c \
       $(LWIPDIR)/core/inet.c $(LWIPDIR)/core/ipv4/ip_addr.c \
       $(LWIPDIR)/core/ipv4/ip_frag.c

# NETIFFILES: Files implementing various generic network interface 
functions.
NETIFFILES=$(LWIPDIR)/netif/etharp.c

LWIPFILES=$(COREFILES) $(CORE4FILES) $(NETIFFILES)

lwip.o: $(LWIPFILES)
       $(CC) $(CFLAGS) -o $(OBJDIR)/lwip.o $(LWIPFILES)


To build, I issue a `make lwip.o'. The code seems to build correctly, but I 
receive the following error messages from the assembler:

src/lwip-1.1.0/src/netif/etharp.c: In function `etharp_query':
src/lwip-1.1.0/src/netif/etharp.c:687: warning: unused variable `p'
src/lwip-1.1.0/src/netif/etharp.c: At top level:
src/lwip-1.1.0/src/core/ipv4/ip_frag.c:93: warning: 'ip_reass_timer' defined 
but not used
/tmp/ccAiUTHD.s: Assembler messages:
/tmp/ccAiUTHD.s:20468: Error: symbol `ip_addr_any' is already defined
/tmp/ccAiUTHD.s:20473: Error: symbol `ip_addr_broadcast' is already defined
...
/tmp/ccAiUTHD.s:20815: Error: symbol `ip_addr_any' is already defined
/tmp/ccAiUTHD.s:20820: Error: symbol `ip_addr_broadcast' is already defined
/tmp/ccAiUTHD.s:20831: Error: symbol `ip_addr_any' is already defined
/tmp/ccAiUTHD.s:20836: Error: symbol `ip_addr_broadcast' is already defined
/tmp/ccAiUTHD.s:20843: Error: symbol `netif_list' is already defined
/tmp/ccAiUTHD.s:20849: Error: symbol `netif_default' is already defined
make: *** [lwip.o] Error 1

I am compiling with gcc v3.4.2 on linux. Can anyone please point out what I 
am overlooking?

Cheers,
Chris

Please CC me in response.

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