Good morning, I got your email address at https://gcc.gnu.org/about.html, where the footnote on the page says "Comments on these web pages ... are welcome on our developer list at gcc@gcc.gnu.org." I hope I found the right address to report broken links.
The following links are broken at gcc.gnu.org/onlinedocs/4.9.2. The corresponding 4.9.2-related links at gcc.gnu.org/onlinedocs are also broken: GCC 4.9.2 GNAT User's Guide (/onlinedocs/gcc-4.9.2/gnat_ugn_unw/) also in PDF (/onlinedocs/gcc-4.9.2/gnat_ugn_unw.pdf) or Postscript (/onlinedocs/gcc-4.9.2/gnat_ugn_unw.ps.gz) or an HTML tarball (/onlinedocs/gcc-4.9.2/gnat_ugn_unw-html.tar.gz) Thank you for your time, -- James