On 06/28/2010 06:03 PM, Jes Sorensen wrote:
On 06/28/10 17:42, Blue Swirl wrote:
On Mon, Jun 28, 2010 at 2:50 PM, Jes Sorensen<jes.soren...@redhat.com> wrote:
I figured out what was causing it. qemu-options.def has an
#ifdef MAP_POPULATE in it, which isn't being set without sys/mmap.h
being included. Pretty much every other #ifdef in qemu-options.def are
based on CONFIG_foo settings or things like _WIN32 which do not change
depending on header file inclusion.
I think the easiest fix is to just add sys/mmap.h to the include list in
os-posix.c, so I just posted a patch for that. Though, in principle we
really shouldn't base qemu-options.def settings on defines pulled in
from system header files.
I think more flags should be added to arch_mask field, like
QEMU_ARCH_LINUX, QEMU_ARCH_POSIX and QEMU_ARCH_WIN32. Then the #ifdefs
should be removed. Prealloc command line flag stuff should be
conditional to CONFIG_LINUX only, there should be another check for
MAP_POPULATE where mem_preallocate is set.
Alternatively, we could have more arch_mask flags like QEMU_MAP_POPULATE.
Yeah, the problem with tying it to CONFIG_LINUX is that older version of
Linux may not support it. Looking through the list, MAP_POPULATE is
really an oddball in there though, so maybe it would be cleaner to catch
it via configure and then use CONFIG_MAP_POPULATE or something like that?
Or create a header file system.h that pulls all we need from the system,
and remove (almost) all <...> includes from elsewhere.
Paolo
