Re: [Libguestfs] question about guestfs_add_drive_opts_blocksize

gcc create_disk.c -L lib/.libs -lguestfs -o create_disk builds but when run:- libguestfs: error: add_drive: unknown option 12 (this can happen if a program is compiled against a newer version of libguestfs, then dynamically linked to an older version) Doesn't that come from using /usr/lib/x86_64-linux-gnu/libguestfs.so [an old (installed) version)?

There is only a static library in my build tree:- lib/.libs/libguestfs.a [I'm not much good at messing with shared/static libraries] Stefan > On 03/26/2021 10:19 AM Richard W.M. Jones <rjones(a)redhat.com&gt; wrote: > > > On Fri, Mar 26, 2021 at 09:57:47AM -0600, Stefan Fiala wrote: > > I want to do some work with 4K blocksize devices (real and virtual). I found > > examples/create_disk.c > > then found it didn't contain the blocksize option. I have Ubuntu 20.04 > > guestfish version 1.40.2. I investigated and found a recent checkin 1.45.2 that > > adds this option. > > Do you mean this one? > > commit 94843f155aa72d75d693a96f7b11ceb7558837f0 > Author: Nikolay Ivanets > Date: Tue Feb 11 16:12:24 2020 +0200 > > lib: add support for disks with 4096 bytes sector size > > > I then rebuilt libguestfs from scratch using tag V1.45.2. > > I noted the warning not to "make install" it and stopped. > > > > I don't see how to build create_disk.c against a libguesfs.a version 1.45.2. > > The faq/etc talk about running a self-compiled program using ./run but not how > > to make such a program with a different version. > > You can just do something like: > > gcc create_disk.c -L lib/.libs -lguestfs -o create_disk > ./run ./create_disk > > Rich. > > -- > Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones > Read my programming and virtualization blog: http://rwmj.wordpress.com > virt-top is 'top' for virtual machines. Tiny program with many > powerful monitoring features, net stats, disk stats, logging, etc. > http://people.redhat.com/~rjones/virt-top