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Stan Katz wrote: > Hi, > > [...] The hardware I am using (Hitachi SH2) has fast internal Flash and Ram [...] > > The problem is that for production we will be generating several systems containing different combinations of the > drivers, and we plan to add drivers as the new hardware is developed. The original plan was to place all the drivers > in a library archive and to let the linker select the needed drivers. This is also now working. > > The problem is combining the 2 requirements. [...] > Unfortunately however, the linker seems to allocate > the library data last (which is as I expected) and by the time any code from the library is included the internal > Flash is already full with other code and the .libtext data ends up after the .text. > Perhaps you can't have your cake and eat it. If you whish to load more instruction/data to the fast memory than its total capacity, you shouldn't expect the linker to decide which sections is more important to you. > > Any other ideas out there, or am I going to have to look into extending the linker ? > You might consider putting everything in explicit files and use #if (HAS_DRIVER_XYZ) / #endif around the complete source code (after a few header files that gets the applicable value for HAS_DRIVER_XYZ) for the device-specific portions of your application source code. This way, you bring the code selection decisions up front, to the source code, and make it explicit. I used this approach in a project, with a special-purpose C preprocessor that could give the complete project source code filtered for a specific configuration. > > Stan Katz > > ------ > Want more information? See the CrossGCC FAQ, http://www.objsw.com/CrossGCC/ > Want to unsubscribe? Send a note to crossgcc-unsubscribe@sources.redhat.com -- - Thierry Moreau CONNOTECH Experts-conseils inc. 9130 Place de Montgolfier Montreal, Qc H2M 2A1 Tel.: (514)385-5691 Fax: (514)385-5900 e-mail: thierry.moreau@connotech.com ------ Want more information? See the CrossGCC FAQ, http://www.objsw.com/CrossGCC/ Want to unsubscribe? Send a note to crossgcc-unsubscribe@sources.redhat.com
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