It's even more than that: With -ffunction-sections you can have all the topic-specific code in one single c file and include it into your project. It is compiled with your project and may obey shared global defines, such as global clock frequency, number UART channels, debug levels, whatever.
At link stage, the linker will discard any function in this single .c file that is not referenced by either your project code or by the functions from this c file that are used by your project code. This way, a single .c file acts as a whole precompiled library (with its individual sectiosn built from a lot of individual .c files) just that it isn't precompiled and therefore obeys global defines and project specific compiler settings (including HW-MPY, far/near data model etc.) I really LOVE it for my collection of library functions. The way you described it, including the precompiled object file to the link stage, is indeed working, but no better than including a precompiled library. In fact, it acts as a poor-mans library implementation. It's only advantage is that AFAIK you don't have to take care for the proper linking order. JMGross ----- Ursprüngliche Nachricht ----- Von: Grant Edwards Gesendet am: 05 Aug 2011 16:38:52 If you're just bulding multiple versions of one program with different features enabled, --gc-sections allows you to do that without having to recompile anything -- it's all handled at the link stage. If you want to build the full-fat version, you link in all the files. If you don't want features A and B, you don't link in object files A and B. The linker figures out what other functions/data aren't need now that A and B have been left out, and those functions get left out as well. ------------------------------------------------------------------------------ BlackBerry® DevCon Americas, Oct. 18-20, San Francisco, CA The must-attend event for mobile developers. Connect with experts. Get tools for creating Super Apps. See the latest technologies. Sessions, hands-on labs, demos & much more. Register early & save! http://p.sf.net/sfu/rim-blackberry-1 _______________________________________________ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
