GCC 14 newly by default treats as errors a number of situations which
before were only warnings.  For more information see
https://gcc.gnu.org/gcc-14/porting_to.html and meta bug #1220571.

Because of this, package libgpod fails to compile.  This can be seen online
at:
https://build.opensuse.org/package/live_build_log/openSUSE:Factory:Staging:Gcc7/libgpod/standard/x86_64

It can be reproduced locally with command: osc build --clean
--alternative-project home:rguenther:nextgcc

We seem to need at least https://sourceforge.net/p/gtkpod/patches/47/
The following Gentoo bugs are however also listed as relvant:
  - https://bugs.gentoo.org/919219
  - https://bugs.gentoo.org/885349
  - https://bugs.gentoo.org/926995


The (first) error (that halts the build) is:

[   22s] generic-callout.c: In function ‘get_info_from_usb’:
[   22s] generic-callout.c:667:14: error: type of ‘usb_bus_number’ defaults to
‘int’ [-Wimplicit-int]
[   22s]   667 | static char *get_info_from_usb (usb_bus_number,
usb_device_number)
[   22s]       |              ^~~~~~~~~~~~~~~~~
[   22s] generic-callout.c:667:14: error: type of ‘usb_device_number’ defaults
to ‘int’ [-Wimplicit-int]