Csdrhrt

Using makefiles is new to me. My first tests with the simplest approach worked very well so far. But now I got stuck writing a makefile that creates a executable file and a shared library. As I said I'm new to makefiles. Here is my simple approach:

exe.a: main.c func.c

    gcc main.c func.c -o exe.a

lib.so: func.c

    gcc func.c -o lib.so -fPIC -shared

When the makefile is executed only the executable will be compiled. Is it even possible to create two objects with one makefile? What is the best approach to create these files?

By default make will build only the first target in a Makefile
which is exe.a in your case. You can either tell make to create
another target:

make lib.so

or both targets:

make lib.so exe.a

or (preferred) introduce a new first target which is usually named
all:

all: exe.a lib.so



exe.a: main.c func.c

    gcc main.c func.c -o exe.a

lib.so: func.c

    gcc func.c -o lib.so -fPIC -shared

Now a simple make will build the (pseudo-) target all which in turn
depends on exe.a and lib.so, so they get built first. Note that you
must not have a file called all in your directory in this case because
then make gets confused.