The problem compiling s-fileio.adb

[Richard Kenner]

This looks related to the recent changes you've been making to the handling
of variable-sized stuff.

If I grep s-fileio.adb.t03.generic for D.1275, I get

  long int D.1275;
  D.1275 = system__file_io__temp_file_record__next___OFFSET.22 * 8;
  D.1278 = D.1275 /[ex] 8;
      D.1609 = D.1275 /[ex] 8;
                      D.2334 = D.1275 /[ex] 8;

This all looks fine, except that each of the last two lines are in a
different function than the first three and there's no declaration of D.1275
in each of those latter two functions.

Given the extent of usage of variable-size stuff in Ada, it's probably a good
idea to at least build the RTS when you make changes in that area (that won't
be affected by the bootstrap problems you're having).