[bug-libunistring] build libunisstring on musl libc

[Natanael Copa]

Hi,

We are trying to port Alpine Linux to musl libc. so far 1500 of 1600
packages are building just fine.

libunistring-0.9.3 does not build though:

fseterr.c: In function 'fseterr':
fseterr.c:72:3: error: #error "Please port gnulib fseterr.c to your platform! 
Look at the definitions of ferror and clearerr on your system, then report this 
to bug-gnulib."
  #error "Please port gnulib fseterr.c to your platform! Look at the 
definitions of ferror and clearerr on your system, then report this to 
bug-gnulib."
   ^


When digging into this, it seems like this problem was fixed long time
ago in gnulib. However, since libunistring has not had any new release
in more than 3 years, the gnulib shipped with the release is broken.

It does not seem trivial to just patch in a simple fix either (we
support both musl and uclibc so we will have to do the HAVE___FSETERR
configure check too...)

I wonder if it would be possible make a 0.9.4 release with a recent
gnulib? I believe that would solve it.

Thanks!


-nc