On 04/06/2018 04:26 AM, Richard W.M. Jones wrote: > On Thu, Apr 05, 2018 at 03:03:41PM -0500, Eric Blake wrote: >> CentOS 6 has libguestfs-devel 1.20.11, which predates the support >> in guestfs_add_drive_opts() for requesting an nbd drive instead >> of a local file. The guestfs plugin can still be built, so no >> configure changes are needed; but skip the tests that fail to >> compile so that 'make check' can at least complete. >> >> Signed-off-by: Eric Blake <ebl...@redhat.com> > > >> +#ifndef GUESTFS_ADD_DRIVE_OPTS_PROTOCOL > > There's a symbol defined for this kind of test: > > #ifndef GUESTFS_HAVE_ADD_DRIVE_OPTS > ... > > (from <guestfs.h>).
The libguestfs on CentOS 6 does define GUESTFS_HAVE_ADD_DRIVE_OPTS (and the function family guestfs_add_drive_opts*), however, it only supports up through option 5 GUESTFS_ADD_DRIVE_OPTS_CACHEMODE. The compile failure was that GUESTFS_ADD_DRIVE_OPTS_PROTOCOL was undefined. (The documentation at http://libguestfs.org/guestfs.3.html#guestfs_add_drive doesn't list which version various options were added in, only that the function itself was added in 0.3, which predates 1.20.11). > > However in this case I wonder if it would be better to test for this > in the ./configure script and disable the HAVE_LIBGUESTFS automake > conditional (but probably not error out -- we want to still compile on > RHEL 6). What do you think? Might be easier; I'll play with it, and post a v2 patch along those lines (certainly a smaller patch, but it does mean that we won't even attempt to build plugins/guestfs - I guess that's still okay for an older release). -- Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3266 Virtualization: qemu.org | libvirt.org
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