_LARGEFILE64_SOURCE should be unnecessary. _FILE_OFFSET_BITS=64
does the real work to link to the 64-bit functions.
Don't abuse libtool's -version-info to make the library version
match the package version. These do not necessarily correspond.
Remove the .la files; these are causing libtool to overlink. This
should save you from needlessly rebuilding some dependent packages
in the future.
Signed-off-by: Kyle Guinn <elyk03@gmail.com>