diff --git a/.byacc.metadata b/.byacc.metadata
new file mode 100644
index 0000000..7e7bd7e
--- /dev/null
+++ b/.byacc.metadata
@@ -0,0 +1 @@
+208e0962709d69dd56a1dbbfdf821ac6dc0e682b SOURCES/byacc-20170709.tgz
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..de775a8
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+SOURCES/byacc-20170709.tgz
diff --git a/SPECS/byacc.spec b/SPECS/byacc.spec
new file mode 100644
index 0000000..5f49c97
--- /dev/null
+++ b/SPECS/byacc.spec
@@ -0,0 +1,272 @@
+%define byaccdate 20170709
+
+Summary: Berkeley Yacc, a parser generator
+Name: byacc
+Version: 1.9.%{byaccdate}
+Release: 4%{?dist}
+License: Public Domain
+Group: Development/Tools
+URL: http://invisible-island.net/byacc/byacc.html
+Source: ftp://invisible-island.net/byacc/byacc-%{byaccdate}.tgz
+BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
+
+%description
+This package provides a parser generator utility that reads a grammar
+specification from a file and generates an LR(1) parser for it. The
+parsers consist of a set of LALR(1) parsing tables and a driver
+routine written in the C programming language. It has a public domain
+license which includes the generated C.
+
+If you are going to do development on your system, you will want to install
+this package.
+
+%prep
+%setup -q -n byacc-%{byaccdate}
+
+# Revert default stack size back to 10000
+# https://bugzilla.redhat.com/show_bug.cgi?id=743343
+find . -type f -name \*.c -print0 |
+ xargs -0 sed -i 's/YYSTACKSIZE 500/YYSTACKSIZE 10000/g'
+
+%build
+%configure --disable-dependency-tracking
+make %{?_smp_mflags}
+
+%install
+rm -rf $RPM_BUILD_ROOT
+make DESTDIR=$RPM_BUILD_ROOT install
+ln -s yacc $RPM_BUILD_ROOT/%{_bindir}/byacc
+ln -s yacc.1 $RPM_BUILD_ROOT/%{_mandir}/man1/byacc.1
+
+%check
+echo ====================TESTING=========================
+make check
+echo ====================TESTING END=====================
+
+%clean
+rm -rf $RPM_BUILD_ROOT
+
+%files
+%doc ACKNOWLEDGEMENTS CHANGES NEW_FEATURES NOTES NO_WARRANTY README
+%defattr(-,root,root,-)
+%{_bindir}/yacc
+%{_bindir}/byacc
+%{_mandir}/man1/yacc.1*
+%{_mandir}/man1/byacc.1*
+
+%changelog
+* Wed Feb 07 2018 Fedora Release Engineering <releng@fedoraproject.org> - 1.9.20170709-4
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild
+
+* Wed Aug 02 2017 Fedora Release Engineering <releng@fedoraproject.org> - 1.9.20170709-3
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_27_Binutils_Mass_Rebuild
+
+* Wed Jul 26 2017 Fedora Release Engineering <releng@fedoraproject.org> - 1.9.20170709-2
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_27_Mass_Rebuild
+
+* Wed Jul 12 2017 Patsy Franklin <pfrankli@redhat.com> - 1.9.20170709-1
+- Rebase to 20170709
+
+* Mon Feb 13 2017 Patsy Franklin <pfrankli@redhat.com> - 1.9.20170201-1
+- Rebase to 20170201
+
+* Fri Feb 10 2017 Fedora Release Engineering <releng@fedoraproject.org> - 1.9.20161202-2
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild
+
+* Fri Dec 09 2016 Patsy Franklin <pfrankli@redhat.com> - 1.9.20161202-1
+- Rebase to 20161202
+
+* Mon Aug 01 2016 Patsy Franklin <pfrankli@redhat.com> - 1.9.20160606-1
+- Rebase to 20160606
+
+* Fri May 20 2016 Patsy Franklin <pfrankli@redhat.com> - 1.9.20160324-1
+- Rebase to 20160324
+
+* Wed Feb 03 2016 Fedora Release Engineering <releng@fedoraproject.org> - 1.9.20150711-2
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_24_Mass_Rebuild
+
+* Sat Oct 10 2015 Patsy Franklin <pfrankli@redhat.com> - 1.9.20150711-1
+- Rebase to 20150711
+
+* Wed Jun 17 2015 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 1.9.20141128-2
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_23_Mass_Rebuild
+
+* Mon Mar 02 2015 Patsy Franklin <pfrankli@redhat.com> - 1.9.20141128-1
+- Rebase to 20141128
+
+* Fri Aug 15 2014 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 1.9.20130925-4
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_21_22_Mass_Rebuild
+
+* Sat Jun 07 2014 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 1.9.20130925-3
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_21_Mass_Rebuild
+
+* Mon Dec 02 2013 Patsy Franklin <pfrankli@redhat.com> - 1.9.20130925-2
+- Update sources file.
+
+* Mon Dec 02 2013 Patsy Franklin <pfrankli@redhat.com> - 1.9.20130925-1
+- Rebase to 20130925
+
+* Sat Aug 03 2013 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 1.9.20130304-2
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_20_Mass_Rebuild
+
+* Wed Mar 20 2013 Petr Machata <pmachata@redhat.com> - 1.9.20130304-1
+- Rebase to 20130304
+
+* Wed Feb 13 2013 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 1.9.20120115-3
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_19_Mass_Rebuild
+
+* Wed Jul 18 2012 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 1.9.20120115-2
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_18_Mass_Rebuild
+
+* Thu Mar 15 2012 Petr Machata <pmachata@redhat.com> - 1.9.20120115-1
+- Rebase to 20120115
+- Resolves: #782010
+
+* Mon Jan 9 2012 Petr Machata <pmachata@redhat.com> - 1.9.20111219-1
+- Rebase to 20111219
+ - add "-s" option
+ - Resolves: #769237
+- Revert default stack size to 10000
+ - Related: #743343
+
+* Thu Sep 29 2011 Petr Machata <pmachata@redhat.com> - 1.9.20110908-1
+- Rebase to 20110908
+ - add "-i" option.
+ - add error-check in reader.c
+- Resolves: #736627
+
+* Tue Feb 08 2011 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 1.9.20101229-2
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_15_Mass_Rebuild
+
+* Mon Jan 3 2011 Petr Machata <pmachata@redhat.com> - 1.9.20101229-1
+- Rebase to 20101229
+- Resolves: #665985
+
+* Mon Dec 6 2010 Petr Machata <pmachata@redhat.com> - 1.9.20101127-1
+- Rebase to 20101127
+- Resolves: #659010
+
+* Wed Nov 10 2010 Petr Machata <pmachata@redhat.com> - 1.9.20100610-1
+- Rebase to 20100610
+- Update the description in accordance with upstream spec template
+- Resolves: #643598
+
+* Wed Apr 7 2010 Petr Machata <pmachata@redhat.com> - 1.9.20100216-1
+- Rebase to 20100216
+- Drop the buffer overflow patch, upstream implements this
+- Resolves: #577016
+
+* Fri Jul 24 2009 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 1.9.20070509-6
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_12_Mass_Rebuild
+
+* Mon Feb 23 2009 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 1.9.20070509-5
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_11_Mass_Rebuild
+
+* Mon Jul 14 2008 Petr Machata <pmachata@redhat.com> - 1.9.20070509-4
+- Add a patch that fixes ancient buffer overflow
+- Resolves: #454583
+
+* Tue Feb 19 2008 Fedora Release Engineering <rel-eng@fedoraproject.org> - 1.9.20070509-2
+- Autorebuild for GCC 4.3
+
+* Tue Nov 13 2007 Petr Machata <pmachata@redhat.com> - 1.9.20070509-1
+- Update to the 20070509 release.
+- Related: #225632
+
+* Wed Sep 12 2007 Matthias Saou <http://freshrpms.net/> 1.9.20050813-2
+- Update summary.
+- Remove useless doc copying in install section.
+- Add NOTES and NO_WARRANTY docs.
+
+* Fri Feb 2 2007 Petr Machata <pmachata@redhat.com> - 1.9.20050813-1
+- Thomas Dickey's 20050813 version of byacc:
+ - own build system (linux patch reverted)
+ - use tmpfile (security patch reverted)
+- Tidy up the specfile per rpmlint comments
+
+* Wed Jul 12 2006 Jesse Keating <jkeating@redhat.com> - 1.9-29.2.2
+- rebuild
+
+* Fri Feb 10 2006 Jesse Keating <jkeating@redhat.com> - 1.9-29.2.1
+- bump again for double-long bug on ppc(64)
+
+* Tue Feb 07 2006 Jesse Keating <jkeating@redhat.com> - 1.9-29.2
+- rebuilt for new gcc4.1 snapshot and glibc changes
+
+* Fri Dec 09 2005 Jesse Keating <jkeating@redhat.com>
+- rebuilt
+
+* Sun Feb 27 2005 Florian La Roche <laroche@redhat.com>
+- Copyright: -> License:
+
+* Tue Jun 15 2004 Elliot Lee <sopwith@redhat.com>
+- rebuilt
+
+* Fri Feb 13 2004 Elliot Lee <sopwith@redhat.com>
+- rebuilt
+
+* Wed Jun 04 2003 Elliot Lee <sopwith@redhat.com>
+- rebuilt
+
+* Wed Jan 22 2003 Tim Powers <timp@redhat.com>
+- rebuilt
+
+* Thu Dec 05 2002 Elliot Lee <sopwith@redhat.com> 1.9-23
+- Rebuild
+
+* Fri Jun 21 2002 Tim Powers <timp@redhat.com>
+- automated rebuild
+
+* Thu May 23 2002 Tim Powers <timp@redhat.com>
+- automated rebuild
+
+* Wed Jan 09 2002 Tim Powers <timp@redhat.com>
+- automated rebuild
+
+* Sun Jun 24 2001 Elliot Lee <sopwith@redhat.com>
+- Bump release + rebuild.
+
+* Fri Jan 05 2001 Preston Brown <pbrown@redhat.com>
+- security patch for tmpfile creation from Olaf Kirch <okir@lst.de>
+
+* Fri Sep 29 2000 Bernhard Rosenkraenzer <bero@redhat.com>
+- Update to the version in FreeBSD CVS - it's actively maintained, unlike
+ the 1993 4BSD version we used to have
+
+* Wed Jul 12 2000 Prospector <bugzilla@redhat.com>
+- automatic rebuild
+
+* Wed Jun 28 2000 Bill Nottingham <notting@redhat.com>
+- fix perms in tarball
+
+* Mon Jun 19 2000 Bernhard Rosenkraenzer <bero@redhat.com>
+- FHSify
+- handle RPM_OPT_FLAGS
+
+* Sat May 6 2000 Bill Nottingham <notting@redhat.com>
+- fix yacc for ia64
+
+* Fri Feb 4 2000 Bernhard Rosenkraenzer <bero@redhat.com>
+- rebuild to compress man pages
+- fix up manpage symlink
+
+* Wed Apr 07 1999 Preston Brown <pbrown@redhat.com>
+- man page fixed.
+
+* Sun Mar 21 1999 Cristian Gafton <gafton@redhat.com>
+- auto rebuild in the new build environment (release 10)
+
+* Thu Dec 17 1998 Cristian Gafton <gafton@redhat.com>
+- build for glibc 2.1
+
+* Tue Aug 11 1998 Jeff Johnson <jbj@redhat.com>
+- build root
+
+* Tue May 05 1998 Prospector System <bugs@redhat.com>
+- translations modified for de, fr, tr
+
+* Thu Oct 23 1997 Donnie Barnes <djb@redhat.com>
+- various spec file cleanups
+
+* Mon Jun 02 1997 Erik Troan <ewt@redhat.com>
+- built against glibc