CI fails due to gnulib
It seems the latest builds fail with the following error
Makefile:1384: recipe for target 'uninorm/u32-normalize.lo' failed
In file included from unistr/u8-mbtouc.c:35:0:
./unistr.h:33:30: fatal error: unused-parameter.h: No such file or directory
#include "unused-parameter.h"
That seems to be a side effect of the latest gnulib commit.