While doing some maintenance for our hipox machine i hit a problem which was discussed controversially a few months before on this ML[1] but was not solved completely in my opinion.
The basic question was if it is valid to use PREFERRED_VERSION_linux-libc-headers higher than the kernel version (like e.g angstrom-2008.1 does). After some research on that topic i really believe this is not allowed. My strongest argument is the kernel docu itself: "Kernel headers are backwards compatible, but not forwards compatible. This means that a program built against a C library using older kernel headers should run on a newer kernel (although it may not have access to new features), but a program built against newer kernel headers may not work on an older kernel."[2] Also i did not found a linux distribution providing kernel headers newer than the kernel (whilst there are some with kernel headers older than the used kernel, e.g. openSUSE 11.3 with latest updates). So i think the way the Ångström distribution handles this is wrong. If PREFERRED_VERSION_linux-libc-headers is set to 2.6.31 no kernel older than 2.6.31 should be allowed to guarantee the full functionality of all programs! [1] <http://thread.gmane.org/gmane.comp.handhelds.openembedded/32375> [2] Documentation/make/headers_install.txt Steffen -- DResearch Fahrzeugelektronik GmbH Otto-Schmirgal-Str. 3, 10319 Berlin, Germany Tel: +49 30 515932-237 mailto:[email protected] Fax: +49 30 515932-299 Geschäftsführer: Dr. Michael Weber, Werner Mögle; Amtsgericht Berlin Charlottenburg; HRB 130120 B; Ust.-IDNr. DE273952058 _______________________________________________ Openembedded-devel mailing list [email protected] http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-devel
