No rule to make target needed by `all'

HarryBoy · 02-02-2011, 05:32 AM

My make file has the following lines:

blah blah

INCLUDES= -I./src \
-I./include \
-I$(PROJECTPATH)/myproject/libs/liburi/include

LDFLAGS+= -L$(PROJECTPATH)/myproject/libs/liburl/ \
-L$(PROJECTPATH)/myproject/libs/liburl/src \

EXTRA_LIBS+= libul.so.1 \
otherlibs.so.1

When I try to make it it says:

rm -f *.so.*
rm -f *.a
make: *** No rule to make target `liburi.so.1', needed by `all'. Stop.

The LDFLAGS specifies the library path, which is specified as -L$(PROJECTPATH)/myproject/libs/liburl/

When I check this directory on my machine I see that the file: liburi.so.1 is indeed there.

What is going wrong? I am new top make files so please help me understand what could be going wrong.

dwhitney67 · 02-02-2011, 06:11 AM

I believe the problem is your settings for EXTRA_LIBS; try using the -l (lowercase L) following by the shorthand notation of the library name. Thus if you want to build with a library called "libfoo.so", the shorthand notation is "foo".

If you have a library named otherlibs.so, then it is not properly named. It should be libotherlibs.so, and when you specify it in EXTRA_LIBS, it should be done as -lotherlibs.

Also, it is not typical to specify the path to source code with LDFLAGS. I believe you should remove the second entry that you specified (ie. liburl/src).

P.S. Here's a simple Makefile (which I have not tested):

Code:

APP      = myprog

SRCS     = $(wildcard *.c)
OBJS     = $(SRCS:c=o)

INCLUDES = -I$(PROJECTPATH)/myproject/libs/liburl/include
DEBUG    = -g
CFLAGS   = -Wall -pedantic -c $(INCLUDES) $(DEBUG)

LDFLAGS  = -L$(PROJECTPATH)/myproject/libs/liburl
LDFLAGS += -lurl

.PHONY: all clean realclean

all : $(APP)

$(APP) : $(OBJS)
        $(CC) $^ $(LDFLAGS) -o $@

%.o : %.c
        $(CC) $(CFLAGS) $^

clean :
        $(RM) $(OBJS)

realclean : clean
        $(RM) $(APP)