[Coin-bcpdiscuss] Link problems

[Carlos Eduardo de Andrade]

Hellow,

I'm having problems to link my code. The error is

/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../lib/crt1.o: In function `_start':
(.text+0x18): undefined reference to `main'

i.e., the linker can't find the main(). My compilation command is

g++ -g <objs>  -L/home/carlos/software/coin/lib -lBcp -lOsiGlpk -lOsi
-L/usr/lib -lglpk -lCoinUtils  `cat
/home/carlos/software/coin/lib/bcp_addlibs.txt` `cat
/home/carlos/software/coin/lib/osi_addlibs.txt` `cat
/home/carlos/software/coin/lib/coinutils_addlibs.txt` -o spp

I think that problem is the order of the libs. I tried many
combinations but nothing.
It's funny because BAC example works correctly, say, compile and link
correctly. My Makefile is almost identical. See you:

USER_DEFINES = -DLINUX
USER_FLAGS = -g
COINDIR = /home/carlos/software/coin
SOLVER = GLPK
USER_DEFINES += -DCOIN_USE_$(SOLVER)
EXE = spp

OBJS = \
	./Member/item1d.o \
	./Member/item2d.o \
	./Member/compoundeditem.o \
	./Member/spp.o \
	./Member/SPP_user_data.o \
	./Member/SPP_var.o \
	./Member/SPP_init.o \
	./Member/SPP_vargen_by_knapsack.o \
	./Member/SPP_vargen_by_mip_solver.o \
	./Member/SPP_vargen_by_combinations.o \
	./Member/SPP_heuristic_gen.o \
	./Member/testunit.o \
	./TM/SPP_tm.o \
	./TM/SPP_tm_param.o \
	./LP/SPP_lp.o \
	./LP/SPP_lp_branch.o \
	./LP/SPP_lp_param.o \
	./LP/SPP_lp_vargen.o

USER_INCDIRS = include
USER_OSI_LIBS = -lOsiGlpk
USER_SOLVER_LIBS = -L$(GLPK_LIB_DIR) -lglpk
USER_INCDIRS += $(GLPK_INC_DIR)
USER_EXTRA_LIBS =

CXX = g++
CXXFLAGS = $(USER_FLAGS)
CXXLINKFLAGS =

COININCDIR = $(COINDIR)/include
COINLIBDIR = $(COINDIR)/lib

LIBS = \
	-L$(COINLIBDIR) \
	-lBcp \
	$(USER_OSI_LIBS) \
	-lOsi \
	$(USER_SOLVER_LIBS) \
	-lCoinUtils \
	$(USER_EXTRA_LIBS) \
	`cat $(COINLIBDIR)/bcp_addlibs.txt` \
	`cat $(COINLIBDIR)/osi_addlibs.txt` \
	`cat $(COINLIBDIR)/coinutils_addlibs.txt`

INCLUDES = `for i in $(USER_INCDIRS) $(COININCDIR); do echo $$i | sed
-e 's/^/-I/'; done`

all: $(EXE)

.SUFFIXES: .cpp .o

$(EXE): $(OBJS)
	$(CXX) $(CXXFLAGS) $(CXXLINKFLAGS) $(OBJS) $(LIBS) -o $@

.cpp.o:
	$(CXX) $(CXXFLAGS) $(INCLUDES) $(USER_DEFINES) -c $< -o $@

clean:
	rm -rf $(EXE) $(OBJS)


I tried to use the Makefile example, but it don't work too. Do
Somebody have an ideia?!?!

Thanks for all,

Carlos

p.s.: sorry my English
-- 
Carlos Eduardo de Andrade
Escola Agrotecnica Federal de Inconfidentes
Brazil