On 2021-04-15 16:49 +0100, John Burrell via blfs-dev wrote:
> On Thu, 15 Apr 2021 at 15:25, Xi Ruoyao via blfs-dev
> <blfs-dev@lists.linuxfromscratch.org> wrote:
> >
> > On 2021-04-15 10:43 +0100, John Burrell via blfs-dev wrote:
> > > On Sat, 10 Apr 2021 at 16:10, Xi Ruoyao via blfs-dev
> > > <blfs-dev@lists.linuxfromscratch.org> wrote:
> > > >
> > > > On 2021-04-10 15:05 +0100, John Burrell via blfs-dev wrote:
> > > > > Using the systemd version of the development book, libblockdev-2.25
> > > > > gives:
> > > > >
> > > > > vdo.c: In function ‘bd_vdo_stats_copy’:
> > > > > vdo.c:84:5: error: ‘g_memdup’ is deprecated: Use 'g_memdup2' instead
> > > > > [-Werror=deprecated-declarations]
> > > > > 84 | return g_memdup (stats, sizeof (BDVDOStats));
> > > > > | ^~~~~~
> > > > > In file included from /usr/include/glib-2.0/glib.h:82,
> > > > > from vdo.c:20:
> > > > > /usr/include/glib-2.0/glib/gstrfuncs.h:257:23: note: declared here
> > > > > 257 | gpointer g_memdup (gconstpointer mem,
> > > > > | ^~~~~~~~
> > > > > cc1: all warnings being treated as errors
> > > > >
> > > > > I didn't see a way to stop warnings being treated as errors in the
> > > > > configure script. I tried -Wno-error=deprecated-declarations, but that
> > > > > didn't work, so I added
> > > > >
> > > > > CFLAGS=-Wno-error
> > > > >
> > > > > to the configure command to allow it to compile.
> > > >
> > > > sed 's/g_memdup/g_memdup2/' makes more sense. g_memdup is deprecated
> > > > because
> > > > using it may cause security issues and there is no way to fix without
> > > > changing
> > > > the API.
> > > > --
> > > > Xi Ruoyao <xry...@mengyan1223.wang>
> > > > School of Aerospace Science and Technology, Xidian University
> > >
> > > I now have glib-2.66.8 installed and this seems to fix the problem
> > > with g_memdup in libblockdev-2.25
> > > I assume that this is also the case with the latest version,
> > > glib-2.68.1, but I haven't tried it yet.
> > > It would appear that the sed in libblockdev-2.25 is no longer required
> > > and in fact now causes the compile to fail if included.
> >
> > Negative. It's not a "fix". It's just g_memdup is deprecated *since* 2.68.
> >
> > g_memdup is insecure by its nature. Any new code should use g_memdup2
> > instead.
> > --
> > Xi Ruoyao <xry...@mengyan1223.wang>
> > School of Aerospace Science and Technology, Xidian University
>
> Have you tried compiling libblockdev-2.25 with the sed in there and
> with glib-2.68.1
> because it doesn't work with glib-2.66.8?
I just tried again. No issue.
The sed command is:
sed 's/g_memdup/&2/' -i \
src/lib/plugin_apis/vdo.{c,api} \
src/plugins/vdo.c
It won't work for 2.66.8: in 2.66.6 g_memdup2 was added, but as a private
symbol.
ref:
https://discourse.gnome.org/t/port-your-module-from-g-memdup-to-g-memdup2-now/5538
--
Xi Ruoyao <xry...@mengyan1223.wang>
School of Aerospace Science and Technology, Xidian University
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