Creating and Using Libraries

Switching from Archive to Shared Libraries

Debugger Limitations

Shared libraries can be debugged just like archive libraries with few exceptions. For details on debugging shared libraries, refer to the HP/DDE Debugger User's Guide or the HP-UX Symbolic Debugger User's Guide.

Using the chroot Command with Shared Libraries

Some users may use the chroot super-user command when developing and using shared libraries. This affects the path name that the linker stores in the executable file. For example, if you chroot to the directory /users/hyperturbo and develop an application there that uses the shared library libhype.sl in the same directory, ld records the path name of the library as /libhype.sl. If you then exit from the chrooted directory and attempt to run the application, the dynamic loader won't find the shared library because it is actually stored in /users/hyperturbo/libhype.sl, not in /libhype.sl.

Conversely, if you move a program that uses shared libraries into a chrooted environment, you must have a copy of the dynamic loader, dld.sl, and all required shared libraries in the correct locations.

Profiling Limitations

Profiling with the prof(1) and gprof(1) commands and the monitor library function is only possible on a contiguous chunk of the main program (a.out). Since shared libraries are not contiguous with the main program in virtual memory, they cannot be profiled. You can still profile the main program, though. If profiling of libraries is required, relink the application with the archive version of the library, using the -a archive option.

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Kenwood HP 9000 manual Debugger Limitations, Using the chroot Command with Shared Libraries, Profiling Limitations

HP 9000 specifications

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