Autotools Setup for Static and Shared Libraries

Question

We have a large code base that I'm converting to autotools to help target multiple platforms / configurations. Basically, we have:

|-- configure.ac
|-- Makefile.am
|-- dependency1
|   `-- Makefile.am
|-- dependency2
|   `-- Makefile.am
`-- dependency3
    `-- Makefile.am

The dependency folders are common across many projects, so The Makefile.am files create libdependencyX.la files. In the root Makefile.am, I then use LIBADD to combine everything to create a final shared library. This all works create.

We have the need to create both shared and static versions of our library. How would I go about this? All of the dependencies just use LTLIBRARIES to make everything.

The original solution was just a giant Makefile that created a series of .o files and then building the resulting .so or .a in the end.

Update 2015-03-11

The issue I'm having is that I can get static or shared, but not both. The root Makefile.am looks like this for the final library.

lib_LTLIBRARIES = libroot.la
libroot_la_SOURCES = root.c
libroot_la_LIBADD = dependency1/libdependency1.la \
                    dependency2/libdependency2.la \
                    dependency3/libdependency3.la
libroot_la_LDFLAGS = -shared

Switching the -shared to -static gives me the .a, but how can I get both? --enable-shared / --enable-static doesn't seem to change anything.

Answer 1

It seems my issue is with the libretto_la_LDFLAGS line. Leaving that out and using make install gives both the .a and .so files in the prefix specified.