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Full Discussion: Incompatiblity of the code due to CC compiler version mismatch.
Top Forums Programming Incompatiblity of the code due to CC compiler version mismatch. Post 302770111 by DGPickett on Thursday 14th of February 2013 01:05:21 PM
Old 02-14-2013
Whether it is a .so shared and dynamic library, a .a static library or a .o static object file, you need prototypes and such. A .h may support several subroutines, which maybe all or part of a library. It's nice to try to keep the sizeof the .h down, generally. For something like a RDBMS access library, there is often one include file, but it can include many others. That's very convenient, but the .h files can be kept small.

If the actual memory consuming objects are instantiated in the library not the .h, you can include excess .h files with no runtime cost, as the linker will only pull in the dynamic objects the code actually uses.

Not only are .so files dynamically linked, they are memory mapped and the ram pages that support them are shared by all linked processes. That is why the mnemonic is shared object. It saves ram and increases cache hit rates. You can even find ways to put main() in the shared library - code can look at the name it was exec()'d on, so 100 processes can run the same main() (one per library).
Last edited by DGPickett; 02-14-2013 at 02:12 PM..
 

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LEARN ABOUT MOJAVE

libglib-2.0

libglib-2.0.3(3)                                         Introduction to Library Functions                                        libglib-2.0.3(3)

NAME

       libglib-2.0,  libgmodule-2.0,  libgthread-2.0 - general purpose utility library, GLib support for dynamic plug-ins, GLib support for thread
       abstraction

DESCRIPTION

       GLib is a general-purpose utility library, which provides many useful data types, macros, type conversions, string utilities, a  main  loop
       abstraction, and so on.

       libgmodule-2.0 provides a portable method of dynamically loading plug-ins or shared object modules.

       libgthread-2.0  provides a thread abstraction which includes threads, different mutex methods, conditions, and thread private data. It also
       provides different useful patterns such as thread pools.

       To access the API documentation, you must install the developer version of the package.

FILES

       The following files are used by this application:

       /usr/lib/libglib-2.0.so GNOME general purpose shared library

       /usr/lib/libgmodule-2.0.GLib dynamic plug-in shared library

       /usr/lib/libgthread-2.0.GLib thread abstraction shared library

       /usr/share/gtk-doc/html Location of developer documentation

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWgnome-base-libs  SUNWg-  |
       |                             |nome-base-libs-64            |
       +-----------------------------+-----------------------------+
       |Interface stability          |External                     |
       +-----------------------------+-----------------------------+

SEE ALSO

       glib-genmarshal(1), libgobject-2.0(3), glib-gettextize(3), glib-mkenums(3)

NOTES

       Written by Brian Cameron, Sun Microsystems Inc., 2003, 2004.

SunOS 5.10                                                          31 Aug 2004                                                   libglib-2.0.3(3)
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