Unable to solve “undefined reference” error message

[alexverde]

Hi, hope someone can help me to get this fix.

I created a new netbeans project with existing sources and makefile. The project contains 3 files: two *.c files (main.c and test.c) and a header (test.h). The header contains the declaration of many functions including some external ones (Fortran LAPACK, BLAS libraries) not included in the corresponding test.c. However, the makefile include the path of directories containing these external functions (please, see details below):
---------------------------------------------------
CC = gcc
LD = gcc
LDPATH = -L/usr/lib
LDFLAGS = -llapack -lblas -lm
FLAGS = -Wall -O3
KERN = -DELASTIC #
PFLAG =

PROG = test
OBJS = main.o test.o

all: $(PROG)
main.o: main.c test.h
$(CC) $(FLAGS) $(KERN) -c main.c $(PFLAG)

%.o: %.c %.h
$(CC) $(FLAGS) $(KERN) -c $< $(PFLAG)

$(PROG): $(OBJS)
$(LD) $(OBJS) -o $(PROG) $(LDPATH) $(LDFLAGS) $(PFLAG)
---------------------------------------------------
I added a new file (dgmres.f) to the project with a new external function not included in the path declared above (makefile). I declared this new one in the header (test.h) but when I try to build the project, I got the following error message:

undefined reference to `dgmres_'

Assuming that the issue is closely related to the makefile specification, my questions is:

What changes Do I have to do in the makefile in order to include this new file/function?.

Please, let me know any comments or suggestions. I really appreciated any help on this regard.

PD: I am using Netbeans IDE 7.1.1 under linux Ubuntu 11.10.

[Paulo R. Panhoto]

After a quick peek, it seems to me that your makefile "doesn't know how
to compile your .f file". There should a portion like this in the makefile:

dgmres.o: dgmres.f
gfortran -c dgmres.f

Regards,

Paulo

On 06/04/12 12:14, alexverde wrote: