Hmm, doesn't work for me:
for my_filename in make: Entering directory
`/tmp/libtool/build-x86_64/libltdl' COPYING.LIB README Makefile.am Makefile.in
configure.ac configure ltdl.c ltdl.h lt_error.c libltdl/lt_error.h
libltdl/lt__private.h libltdl/lt__strl.h libltdl/lt_system.h lt__alloc.c
libltdl/lt__alloc.h libltdl/lt__glibc.h libltdl/lt__dirent.h slist.c
libltdl/slist.h lt_dlloader.c libltdl/lt_dlloader.h loaders/preopen.c
lt__dirent.c libltdl/lt__dirent.h lt__strl.c libltdl/lt__strl.h argz_.h argz.c
loaders/Makefile.am loaders/Makefile.in loaders/dld_link.c loaders/dlopen.c
loaders/dyld.c loaders/load_add_on.c loaders/loadlibrary.c loaders/shl_load.c
make: Leaving directory `/tmp/libtool/build-x86_64/libltdl'; do
Did you change anything else? Besides, the documentation does not
really suggest this as an intended use.