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

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


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

[   99s] std.h:95:14: error: conflicting types for ‘fpos_t’; have ‘long int’
[   99s]    95 | typedef long fpos_t;
[   99s]       |              ^~~~~~
[   99s] In file included from sgmlsasp.h:4,
[   99s]                  from replace.c:6: