How to convert Obj-C code into a library

I have 3 apps written in Obj-C that I want to modify and convert to libraries, so I can use them in a Monotouch app.

Where do I find docs that tell me how to take Obj-C code and turn it into libraries?开发者_如何学Python

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Imagine you have a file called lib1.m

You will first have to compile it as object code. For instance:

gcc -Wall -framework Cocoa -o lib1.o lib1.m

That will create lib1.o

Then you'll have to decide wether you want a static or dynamic library.

To build a static library, you'll need a library object first:

glibtool --quiet --mode=compile gcc -o lib1.lo -c lib1.c

Then you can create the static library from the library archive:

glibtool --quiet --mode=link gcc -o lib1.la -c lib1.lo

To build a dynamic library:

libtool -dynamic -flat_namespace -lSystem -undefined suppress -macosx_version_min 10.6 -install_name /usr/local/lib/lib1.dylib -o lib1.dylib lib1.o

Note that for dynamic libraries, you must provide the install path when creating the library.