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Digital UNIX Version 4.0 provides a full complement of dynamic shared libraries, compatible with System V semantics for shared library loading and symbol resolution as well as the System V API for dynamic loading (dlopen, dlclose, dlsym, and dlerror). Because they allow programs to include only information about how to load and access routines rather than the routines themselves, shared libraries increase system performance, reduce disk and memory requirements, and simplify system management.
Digital UNIX Version 4.0 supports the shared libraries described in the following two tables.
Table 7-1. Digital UNIX Version 4.0 Shared Libraries
| Library /usr/shlib | Description |
|---|---|
libDXm.so | Digital Motif Extensions library |
libDXterm.so | DECterm widget library, used by dxterm |
libDtHelp.so | CDE online help routines |
libDtMail.so | Shared library support for the dtmail CDE mail utility |
libDtSvc.so | CDE service routines for desktop management |
libDtTerm.so | Shared library support for the CDE ddterm terminal emulator utility |
libDtWidget.so | shared library of CDE widgets to supplement Motif widget |
libICE.so | Inter-Client Exchange library, which enables the building of protocols |
libMrm.so | Motif Resource Manager library |
libSM.so | The X Session Management Protocol (XSMP) provides a uniform mechanism for users to save and restore their sessions using the services of a network- based session manager. It is built on ICE and is the C interface to the protocol. |
libUil.so | The callable Motif UIL (User Interface Language) compiler used by applications that want to compile UIL at run time. |
libX11.so | Xlib library |
libXETrap.so | X Extension Library |
libXaw.so | X Athena Widgets run-time library |
libXext.so | X Client-side Extension library |
libXi.so | X Input Extension client-side library |
libXIE.so | X Imaging Extension client-side run-time library (V5) |
libXie.so | X Imaging Extension client-side run-time library (V3) |
libXm.so | Motif Widgets library |
libXmu.so | X Miscellaneous utilities run-time library |
libXt.so | X Intrinsics library |
libXtst.so | A library of routines for X clients to make use of the XTEST Extension. |
libXv.so | X video Extension client-side run-time library |
libaio.so | POSIX realtime asynchronous I/O functions |
libaio_raw.so | POSIX realtime asynchronous I/O functions (raw disk and tape only) |
libaud.so | C2 security auditing library |
libbkr.so | Motif Help System library |
libc.so | C library |
libc_r.so | Threadsafe libc (link to libc.so) |
libcda.so | CDA run-time library |
libcdrom.so | Rock Ridge Extensions to CDFS library |
libchf.so | CDA/Imaging signal handling routines |
libcmalib.so | CMA threads library |
libcsa.so | Shared library portion of the CDE dtcm calendar manager utility |
libcurses.so | Curses screen control library |
libcxx.so | NEW |
libdb.so | NEW |
libdnet_stub.so | DECnet library |
libdps.so | Adobe Display PostScript client-side run-time libraries |
libdpstk.so | Adobe Display PostScript toolkit |
libdvr.so | CDA run-time viewer library |
libdvs.so | CDA run-time layout library |
libesnmp.so | NEW |
libexc.so | Library that provides support for exception handling. |
libiconv.so | Internationalization codeset conversion routines |
libids.so | Image display services library |
libids_nox.so | Image display services not dependent on X |
libimg.so | Image processing routines |
libips.so | Image processing routines |
libm.so | Digital Portable Mathmatics Library (DPML) |
libmach.so | Mach library |
libmxr.so | Library used by mxr, the ULTRIX binary interpreter for OSF/1 |
libndb.so | NEW |
libots.so | Compiler run-time support |
libpacl.so | NEW |
libproplist.so | VFS Extended File Attributes library |
libpset.so | NEW |
libpsres.so | Adobe Display PostScript resource utilities |
libpthread.so | Application Programming Interface for Digital UNIX's threads |
libpthreads.so | DECthreads library |
libsecurity.so | C2 security library |
libsm_x.so | Systems Management Graphical support library; no user-level interfaces available. |
libtcl.so | Base Tool Command Language (TCL) support library |
libtclx.so | Extended TCL support library |
libtk.so | Graphical TCL (TK) Extensions library |
libtkx.so | Graphical Extended TCL support library |
libtli.so | XTI library |
libtt.so | SunSoft Tooltalk routines |
libvxvm.so | LSM utility library |
libmsfs.so | AdvFS system call interface library |
libfilsys.so | File system utility library |
libxnet.so | NEW |
libxti.so | XTI library |
Table 7-2. Digital UNIX Version 4.0 Shared /usr/shlibi/X11 Libraries
| Library /usr/shlib/X11 | Description |
|---|---|
libXau.so | X Authorization library |
libXdmDecGreet.so | Motif loadable greeter library |
libXdmGreet.so | Athena-style loadable greeter library |
libXdmcp.so | X Display Manager control program library |
lib_adobe_dps.so | Adobe Display PostScript Extension library |
lib_dec_cirrus.so | Device support for the Cirrus VGA graphics card |
lib_dec_ffb.so | Supports the sfb+ graphics accelerator for 2D and 3D drawing operations |
lib_dec_sfb.so | Device support for the smart frame buffer (HX) |
lib_dec_smt.so | Shared memory transport library |
lib_dec_tx.so | Device support for the TX graphic adapter |
lib_dec_ws.so | Low-layer operating system interface for the X server |
lib_dec_xi_pcm.so | Dynamically-loadable X Input Extension library that supports the dial and box |
lib_dec_xi _serial_mouse.so | Support library for the serial mouse |
lib_dec_xv_tx.so | X Video Extension support for the TX graphic option |
libcfb.so | Color frame buffer library |
libcfb16.so | 16-bit visual support for the color frame buffer |
libcfb32.so | 32-bit visual support for the color frame buffer |
libdbe.so | DOUBLE-BUFFER Extension library |
libdix.so | Device-independent portion of the X Server |
libdixie.so | With libmixie.so, supports the X Image Extensions (XIE) Extension library |
libextMITMisc.so | MIT-SUNDRY-NONSTANDARD Extension library |
libextMultibuf.so | Multi-Buffering Extension library |
libextScrnSvr.so | MIT-SCREEN-SAVER Extension library |
libextSync.so | SYNC Extension library |
libextXCMisc.so | XC-MISC Extension library |
libextbigreq.so | BIG-REQUESTS Extension library |
libextkme.so | Keyboard-Management-Extension |
libextshape.so | SHAPE Extension library |
libextshm.so | MIT-SHM Extension library |
libextxtest.so | XTEST Extension library |
libextxtrap.so | DEC-XTRAP Extension library |
libfont.so | Font access library |
libfr_Speedo.so | Loadable font renderer library |
libfr_Type1.so | Loadable font renderer library |
libfr_fs.so | Loadable X Server font renderer for using a font server |
libmfb.so | Monochrome frame buffer support |
libmi.so | Machine-independent portion of the X Server |
libmixie.so | With libdixie.so, supports the X Image Extensions (XIE) |
libos.so | Operating-system dependent portion of the X Server |
libxinput.so | X Input Extension server-side library |
libxkb.so | XKEYBOARD Extension library |
Note: Digital UNIX Version 4.0 also provides static versions of these libraries.
Digital UNIX Version 4.0 supports quickstart which allows shared libraries with unique addresses to start faster than if their addresses were in conflict. Essentially, each shared library must have a unique address placed in the /usr/shlib/so_locations file which allows applications that link against these shared libraries to start execution faster since the shared objects do not have to be relocated at run time. The ld utility can read and write an so_locations file when it creates a shared library.
Digital UNIX Version 4.0 uses a System V Release 4.0 compatible loader to load shared libraries dynamically. This loader provides the following enhanced features:
Calling into dynamically loaded shared libraries
System V Release 4.0 symbol resolution semantics, including symbol preemption
Prelinking of libraries for fast program loading
Digital UNIX Version 4.0 supports full and partial duplication of shared libraries. The loader looks for backward compatible versions of shared libraries using a path constructed by appending the version string as a subdirectory of the normal search path. As a result, any changes to kernel interfaces or to global data definitions that would ordinarily break binary compatibility will not affect your applications, since you can maintain multiple versions of any shared library and link your application against the appropriate version of that shared library.
In Motif Version 1.2, for example, the OSF changed several of the interfaces, thereby breaking binary compatibility with applications built against Motif 1.1.3 libraries. To preserve binary compatibility, Digital UNIX Version 4.0 supports both Motif 1.1.3 and Motif 1.2.3 shared libraries in Digital UNIX Version 4.0 with our versioning functionality, so that applications that need to can access the Motif 1.1.3 shared libraries. For more information on versioning, see the Programmer's Guide.
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