I have a library (libfoo) that is compiled using libtool into two objects: libfoo.a and libfoo.so.
I have to create, using libtool also, another library (libbar) that will be a single shared library (libbar.so) containing all libfoo's code.
In order to do this, I have to force libbar to link against libfoo.a, and not libfoo.so.
I am in an autotools environment, so I have to solve this using standard configure.in or Makefile.am rules.
I tried several things, like in configure.in :
LDFLAGS="$LDFLAGS "-Wl,-Bstatic -lfoo -Wl,-Bdynamic"
That always results in the -Wl flags on the linking line; but -lfoo has disappeared and has been placed in an absolute-path form (/opt/foo/lib/libfoo.so) at the beginning of it.
I also tried:
LDFLAGS="$LDFLAGS "-L/opt/foo/lib libfoo.a"
or in Makefile.am:
libbar_la_LDADD = -Wl,-Bstatic -lfoo -Wl,-Bdynamic
and
libbar_la_LTLIBRARIES = libfoo.a
etc etc (with many, many variants !)
But I think that definitely I do not have knowledge enough of Autotools/Libtool to solve this alone. I have not been able to find information on the Net about it, always slightly different issues.
The standard way would be to build libfoo
with --disable-shared
. Whether to link statically or dynamically is a decision for the user to make, so there's really no way to force it as a package maintainer, but you could set the configury of libbar
to fail if libfoo.so
is present (I'm not sure of a clean way to do that, and believe it would be a bad idea since it really is a choice for the user.) I think the best bet is to have the user build libfoo
with --disable-shared
, but you can force that choice by specifying static libraries only in libfoo/configure.ac:
LT_INIT([disable-shared])
Note that if you do that, it will not be possible to build libfoo
as a shared library. Perhaps that is what you want.
You could probably use a convenience library. Convenience libraries are intermediate static libraries which are not installed. You could use the prefix noinst
to build one.
noinst_LTLIBRARIES = libfoo_impl.la
lib_LTLIBRARIES = libfoo.la libbar.la
libfoo_la_LIBADD = libfoo_impl.la
libbar_la_LIBADD = libfoo_impl.la
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