GDB 12.1 mingw build fails on Fedora 35

[Tom Tromey]

Alex> I'm trying to build GDB 12.1 from the release tarball on Fedora 35
Alex> using MinGW i686-w64-mingw32 compiler. And getting following
Alex> gnulib error:

I have definitely seen this error before, but I don't remember what I
did to fix it.

I have the gdb 12 branch checked out and I was able to this build on
Fedora 34:

murgatroyd. ./config.status --version
config.status
configured by ../binutils-gdb/configure, generated by GNU Autoconf 2.69,
  with options "'--host=i686-w64-mingw32' '--target=i686-w64-mingw32' '--disable-binutils' '--disable-gas' '--disable-gold' '--disable-gprof' '--disable-ld' '--disable-guile' '--disable-source-highlight' '--without-debuginfod' 'LDFLAGS=-lssp' '--disable-sim' '--disable-gprofng' 'host_alias=i686-w64-mingw32' 'target_alias=i686-w64-mingw32'"


I haven't upgraded to Fedora 35 yet.

FWIW git master doesn't build in this configuration for me due to some
BFD changes.

Tom