Tests under Linux with glibc2

[Jeffrey A Law]

  In message < 199709182229.PAA17462@quickstep.stanford.edu >you write:
  > This is because egcs/libio is not in the include path.  Perhaps this
  > has to do with:
  > 
  >     set libio_bin_dir [lookfor_file ${gccpath} libio/_G_config.h];
  > 
  > in libgloss.exp, and the fact that there is no _G_config.h in a glibc2
  > configuration?  (I do a ./configure; make so srcdir=objdir, if that
  > makes a difference.)
Yup.  It's a problem -- _G_config.h doesn't get built for linux anymore;
thus this test fails and we don't know how to find the right include
files.

It's easy enough to have it check for a second file -- does iostream.list
exist in your libio object directory?  If so, we can use that as a second
search file.

Jeff