Add yacc provider and add dependency to swig (#19087)

* Add byacc dependency to swig when building an autoconf version

* Add yacc provider

Removed extra sycl provider default

var/spack/repos/builtin/packages/bison/package.py

@@ -38,6 +38,8 @@ class Bison(AutotoolsPackage, GNUMirrorPackage):
     # https://lists.gnu.org/archive/html/bug-bison/2019-08/msg00008.html
     patch('parallel.patch', when='@3.4.2')
 
+    provides('yacc')
+
     depends_on('diffutils', type='build')
     depends_on('m4', type=('build', 'run'))
     depends_on('perl', type='build')

var/spack/repos/builtin/packages/byacc/package.py

@@ -18,6 +18,8 @@ class Byacc(AutotoolsPackage):
 
     version('master', branch='master')
 
+    provides('yacc')
+
     depends_on('m4',       type='build')
     depends_on('autoconf', type='build')
     depends_on('automake', type='build')

var/spack/repos/builtin/packages/swig/package.py

@@ -49,6 +49,7 @@ class Swig(AutotoolsPackage, SourceforgePackage):
         depends_on('autoconf', type='build', when=_version)
         depends_on('automake', type='build', when=_version)
         depends_on('libtool', type='build', when=_version)
+        depends_on('yacc', type='build', when=_version)
     # Need newer 'automake' to support newer platforms
     for _target in ['ppc64le', 'aarch64']:
         depends_on('automake@1.15:', type='build', when='target={0}:'.format(_target))