ignoring file lib.a, file was built for archive which is not the architecture being linked (x86_64)

Question

I\'m trying to code a printf clone. I\'ve built a library file called \"libftprintf.a\" but when I try to use it, I get the following error, on Mac OSX 10.8.5:

Answer 1

I've found a slightly dirty but working solution for now. I extract the libft/libft.a archive in a temporary directory. Link the new library with the extracted .o files and then remove the temporary directory.

$(NAME): $(OBJ) $(HEADER)
    make -C libft
    mkdir libft_o && cd libft_o && ar -x ../libft/libft.a && cd ..
    $(AR) $(NAME) libft_o/*.o $(OBJ)
    rm -Rf libft_o
    ranlib $(NAME)

The drawback being that if an object file from libft at some point has the same name than one from the printf files, it will overwrite things. But that's not likely to happen.