Javier Martín wrote:
El mar, 27-01-2009 a las 20:56 +0100, Christian Franke escribió:
Is building a bare 'no-OS' compiler supported by the upstream GCC sources?
Probably a too strict prerequisite for building GRUB.
I can't vouch so for all possible environments, but I can say that
"clean" no-OS targets like i386-pc-elf exist at least for x86 and x86_64
(this last being added as of GCC 4.3.2). However, as I said, if
-ffreestanding does not do its job of providing a "true" freestanding
environment (i.e. without relying on _any_ external libraries or
syscalls, as opposite to the usual hosted environment), a bug report
should be posted.
I haven't examined more recent gcc sources yet, the extra effect of
-ffreestanding on 4.3.1 is a no-op if the program does not use main().
How do those no-OS targets handle the platform independent libgcc
functions, e.g. __divdi3 which is used for 64bit integer division at
least on i386 ? Is a no-OS version of libgcc provided or should the
programmer handle these cases ?
Christian
_______________________________________________
Grub-devel mailing list
Grub-devel@gnu.org
http://lists.gnu.org/mailman/listinfo/grub-devel
