shared libraries

[SM_3]

How can I learn more about shared libraries on HP--UX as well as other unix platforms.

Thanks.

[baiju_3]

http://docs.hp.com has some information available .Pls do a search . This subject is out of my scope :)


Thanks,
BL.

[baiju_3]

Check this out .

http://users.actcom.co.il/~choo/lupg/tutorials/libraries/unix-c-libraries.html



Thanks,
BL.

[A. Clay Stephenson]

The same way I did - study. The reference manuals that are supplied with your compiler will guide you. You may have hardcopy manuals, PFS, or PS files -- but any of these will suffice. Creating a shared library is very easy. All you need to do is find the compiler option that enables position indepedent code (PIC) and the option that passes a command to the link editor (ld) to produce a shared object rather than an executable. Unlike archive libraries, you do not use the ar command. The man pages for the compiler will get you started.

[SM_3]

Thanks.

[Arunvijai_4]

This should help you,
http://docs.hp.com/en/B2355-90655/ch05s07.html

(HP-UX Linker and Libraries User's Guide > Chapter 5. Creating and Using Libraries )

-Arun

[VEL_1 · Accepted solution]

Hi,

For Linux & Solaris, refer the following link:

http://www.linux.org/docs/ldp/howto/Program-Library-HOWTO/shared-libraries.html

http://www.tzone.org/~vandry/shared-lib

[morganelan]

A shared library is a collection of object modules. However, when the linker scans a shared library, it does not copy modules into the application's code section. Instead, the linker preserves information in the application's code section about which unresolved references were resolved in each shared library. At run time, the loader copies the referenced modules from the shared library into memory. If multiple applications linked with a common shared library execute simultaneously, they will all share (or be attached to) the same physical copy of the library in memory (hence the name shared library). The shared library improves the efficiency of memory use and allows smaller application binaries.

For more detail see this link:
http://docs.hp.com/en/B2355-90655/ch05.html