Question

gcc 4.7.2
c89
GNU Make 3.82

I am trying compile this program I have using this Makefile. I have only 1 src file at the moment, but I will have more later to include.

I am trying to get the Makefile to create the bin directory if it doesn’t exist and put the binary executable in there.

INC_PATH=-I/home/dev_tools/apr/include/apr-1
LIB_PATH=-L/home/dev_tools/apr/lib
LIBS=-lapr-1
RUNTIME_PATH=/home/dev_tools/apr/lib
CC=gcc
CFLAGS=-Wall -Wextra -g -m32 -D_DEBUG -D_THREAD_SAFE -D_REENTRANT -D_LARGEFILE64_SOURCE -O2 $(INC_PATH)
OBJECTS=timeout.o
EXECUTABLE=bin/to

all:    build $(EXECUTABLE)

$(EXECUTABLE):
    $(CC) -m32 -o $@ -Wl,-rpath,$(RUNTIME_PATH), $(LIB_PATH) $(OBJECTS) $(LIBS)

build:
    @mkdir -p bin

clean:
    rm -rf *~ timeout *.o

I am getting this error:

make
gcc -m32 -o bin/to -Wl,-rpath,/home/dev_tools/apr/lib, -L/home/dev_tools/apr/lib timeout.o -lapr-1
gcc: error: timeout.o: No such file or directory
make: *** [bin/to] Error 1

When I remove the $(OBJECTS) I get the following:

gcc -m32 -o bin/to -Wl,-rpath,/home/dev_tools/apr/lib, -L/home/dev_tools/apr/lib -lapr-1
/usr/bin/ld: cannot find : No such file or directory
collect2: error: ld returned 1 exit status
make: *** [bin/to] Error 1

Not sure where I am going wrong with this.

Answer 1

You have not specified how to build the target timeout.o.

You need to add the following code:

timeout.o: timeout.c
            $(CC) $(CFLAGS) -c -o $@ $<

If you end up with more source file that you need compiled, you can use a pattern matching rule like this:

%.o: %.c
        $(CC) $(CFLAGS) -c $< -o $@