get error like this,can't find libltdl.

[huangmingyou]

checking ltdl.h usability... no
checking ltdl.h presence... no
checking for ltdl.h... no
checking that we can compile and link with libltdl... no
configure: error: cannot compile and link against libltdl
libgphoto2 requires libltdl (the libtool dl* library),
but cannot compile and link against it.
Aborting.

[SiuyuenChow]

hello，
can you build this project?