15 files changed, 15 insertions, 195 deletions
diff --git a/gr-audio/examples/c++/CMakeLists.txt b/gr-audio/examples/c++/CMakeLists.txt
index 813e162d8a..2f5ba16a30 100644
--- a/gr-audio/examples/c++/CMakeLists.txt
+++ b/gr-audio/examples/c++/CMakeLists.txt
@@ -2,20 +2,8 @@
 #
 # This file is part of GNU Radio
 #
-# GNU Radio is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 3, or (at your option)
-# any later version.
+# SPDX-License-Identifier: GPL-3.0-or-later
 #
-# GNU Radio is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with GNU Radio; see the file COPYING.  If not, write to
-# the Free Software Foundation, Inc., 51 Franklin Street,
-# Boston, MA 02110-1301, USA.
 
 add_executable(dial_tone dial_tone.cc)
 target_link_libraries(dial_tone
diff --git a/gr-audio/examples/c++/dial_tone.cc b/gr-audio/examples/c++/dial_tone.cc
index 039fa39b92..c45f62c7f6 100644
--- a/gr-audio/examples/c++/dial_tone.cc
+++ b/gr-audio/examples/c++/dial_tone.cc
@@ -3,20 +3,8 @@
  *
  * This file is part of GNU Radio
  *
- * GNU Radio is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 3, or (at your option)
- * any later version.
+ * SPDX-License-Identifier: GPL-3.0-or-later
  *
- * GNU Radio is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with GNU Radio; see the file COPYING.  If not, write to
- * the Free Software Foundation, Inc., 51 Franklin Street,
- * Boston, MA 02110-1301, USA.
  */
 
 
diff --git a/gr-audio/examples/grc/CMakeLists.txt b/gr-audio/examples/grc/CMakeLists.txt
index d0d0d568c7..0cba313cda 100644
--- a/gr-audio/examples/grc/CMakeLists.txt
+++ b/gr-audio/examples/grc/CMakeLists.txt
@@ -2,20 +2,8 @@
 #
 # This file is part of GNU Radio
 #
-# GNU Radio is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 3, or (at your option)
-# any later version.
+# SPDX-License-Identifier: GPL-3.0-or-later
 #
-# GNU Radio is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with GNU Radio; see the file COPYING.  If not, write to
-# the Free Software Foundation, Inc., 51 Franklin Street,
-# Boston, MA 02110-1301, USA.
 
 install(
     FILES
diff --git a/gr-audio/examples/python/CMakeLists.txt b/gr-audio/examples/python/CMakeLists.txt
index 6e90b0ef5a..c694a9db19 100644
--- a/gr-audio/examples/python/CMakeLists.txt
+++ b/gr-audio/examples/python/CMakeLists.txt
@@ -2,20 +2,8 @@
 #
 # This file is part of GNU Radio
 #
-# GNU Radio is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 3, or (at your option)
-# any later version.
+# SPDX-License-Identifier: GPL-3.0-or-later
 #
-# GNU Radio is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with GNU Radio; see the file COPYING.  If not, write to
-# the Free Software Foundation, Inc., 51 Franklin Street,
-# Boston, MA 02110-1301, USA.
 
 include(GrPython)
 
diff --git a/gr-audio/examples/python/audio_copy.py b/gr-audio/examples/python/audio_copy.py
index 5909be6508..86da4c8338 100644
--- a/gr-audio/examples/python/audio_copy.py
+++ b/gr-audio/examples/python/audio_copy.py
@@ -4,20 +4,8 @@
 #
 # This file is part of GNU Radio
 #
-# GNU Radio is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 3, or (at your option)
-# any later version.
+# SPDX-License-Identifier: GPL-3.0-or-later
 #
-# GNU Radio is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with GNU Radio; see the file COPYING.  If not, write to
-# the Free Software Foundation, Inc., 51 Franklin Street,
-# Boston, MA 02110-1301, USA.
 #
 
 from __future__ import unicode_literals
diff --git a/gr-audio/examples/python/audio_play.py b/gr-audio/examples/python/audio_play.py
index 7d551cc18a..19c237472f 100644
--- a/gr-audio/examples/python/audio_play.py
+++ b/gr-audio/examples/python/audio_play.py
@@ -4,20 +4,8 @@
 #
 # This file is part of GNU Radio
 #
-# GNU Radio is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 3, or (at your option)
-# any later version.
+# SPDX-License-Identifier: GPL-3.0-or-later
 #
-# GNU Radio is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with GNU Radio; see the file COPYING.  If not, write to
-# the Free Software Foundation, Inc., 51 Franklin Street,
-# Boston, MA 02110-1301, USA.
 #
 
 from __future__ import unicode_literals
diff --git a/gr-audio/examples/python/audio_to_file.py b/gr-audio/examples/python/audio_to_file.py
index e35bb70382..37e3e01388 100644
--- a/gr-audio/examples/python/audio_to_file.py
+++ b/gr-audio/examples/python/audio_to_file.py
@@ -4,20 +4,8 @@
 #
 # This file is part of GNU Radio
 #
-# GNU Radio is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 3, or (at your option)
-# any later version.
+# SPDX-License-Identifier: GPL-3.0-or-later
 #
-# GNU Radio is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with GNU Radio; see the file COPYING.  If not, write to
-# the Free Software Foundation, Inc., 51 Franklin Street,
-# Boston, MA 02110-1301, USA.
 #
 
 from __future__ import unicode_literals
diff --git a/gr-audio/examples/python/dial_tone.py b/gr-audio/examples/python/dial_tone.py
index 98a75e6bb5..ea735cfb1a 100644
--- a/gr-audio/examples/python/dial_tone.py
+++ b/gr-audio/examples/python/dial_tone.py
@@ -4,20 +4,8 @@
 #
 # This file is part of GNU Radio
 #
-# GNU Radio is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 3, or (at your option)
-# any later version.
+# SPDX-License-Identifier: GPL-3.0-or-later
 #
-# GNU Radio is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with GNU Radio; see the file COPYING.  If not, write to
-# the Free Software Foundation, Inc., 51 Franklin Street,
-# Boston, MA 02110-1301, USA.
 #
 
 from __future__ import unicode_literals
diff --git a/gr-audio/examples/python/dial_tone_daemon.py b/gr-audio/examples/python/dial_tone_daemon.py
index 932ae07d4f..580ff3cae8 100644
--- a/gr-audio/examples/python/dial_tone_daemon.py
+++ b/gr-audio/examples/python/dial_tone_daemon.py
@@ -4,20 +4,8 @@
 #
 # This file is part of GNU Radio
 #
-# GNU Radio is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 3, or (at your option)
-# any later version.
+# SPDX-License-Identifier: GPL-3.0-or-later
 #
-# GNU Radio is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with GNU Radio; see the file COPYING.  If not, write to
-# the Free Software Foundation, Inc., 51 Franklin Street,
-# Boston, MA 02110-1301, USA.
 #
 
 from __future__ import print_function
diff --git a/gr-audio/examples/python/dial_tone_wav.py b/gr-audio/examples/python/dial_tone_wav.py
index b9cf6bc510..0fb3e59272 100644
--- a/gr-audio/examples/python/dial_tone_wav.py
+++ b/gr-audio/examples/python/dial_tone_wav.py
@@ -4,20 +4,8 @@
 #
 # This file is part of GNU Radio
 #
-# GNU Radio is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 3, or (at your option)
-# any later version.
+# SPDX-License-Identifier: GPL-3.0-or-later
 #
-# GNU Radio is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with GNU Radio; see the file COPYING.  If not, write to
-# the Free Software Foundation, Inc., 51 Franklin Street,
-# Boston, MA 02110-1301, USA.
 #
 
 # GNU Radio example program to record a dial tone to a WAV file
diff --git a/gr-audio/examples/python/mono_tone.py b/gr-audio/examples/python/mono_tone.py
index be86a4f6f4..279dc9f550 100644
--- a/gr-audio/examples/python/mono_tone.py
+++ b/gr-audio/examples/python/mono_tone.py
@@ -4,20 +4,8 @@
 #
 # This file is part of GNU Radio
 #
-# GNU Radio is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 3, or (at your option)
-# any later version.
+# SPDX-License-Identifier: GPL-3.0-or-later
 #
-# GNU Radio is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with GNU Radio; see the file COPYING.  If not, write to
-# the Free Software Foundation, Inc., 51 Franklin Street,
-# Boston, MA 02110-1301, USA.
 #
 
 from __future__ import unicode_literals
diff --git a/gr-audio/examples/python/multi_tone.py b/gr-audio/examples/python/multi_tone.py
index a2e8702a7a..0229c64fb5 100644
--- a/gr-audio/examples/python/multi_tone.py
+++ b/gr-audio/examples/python/multi_tone.py
@@ -4,20 +4,8 @@
 #
 # This file is part of GNU Radio
 #
-# GNU Radio is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 3, or (at your option)
-# any later version.
+# SPDX-License-Identifier: GPL-3.0-or-later
 #
-# GNU Radio is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with GNU Radio; see the file COPYING.  If not, write to
-# the Free Software Foundation, Inc., 51 Franklin Street,
-# Boston, MA 02110-1301, USA.
 #
 
 from __future__ import division
diff --git a/gr-audio/examples/python/noise.py b/gr-audio/examples/python/noise.py
index ee4e7f213c..8ba8a4f066 100644
--- a/gr-audio/examples/python/noise.py
+++ b/gr-audio/examples/python/noise.py
@@ -4,20 +4,8 @@
 #
 # This file is part of GNU Radio
 #
-# GNU Radio is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 3, or (at your option)
-# any later version.
+# SPDX-License-Identifier: GPL-3.0-or-later
 #
-# GNU Radio is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with GNU Radio; see the file COPYING.  If not, write to
-# the Free Software Foundation, Inc., 51 Franklin Street,
-# Boston, MA 02110-1301, USA.
 #
 
 from __future__ import unicode_literals
diff --git a/gr-audio/examples/python/spectrum_inversion.py b/gr-audio/examples/python/spectrum_inversion.py
index dd495ab19f..0d10af8197 100644
--- a/gr-audio/examples/python/spectrum_inversion.py
+++ b/gr-audio/examples/python/spectrum_inversion.py
@@ -4,20 +4,8 @@
 #
 # This file is part of GNU Radio
 #
-# GNU Radio is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 3, or (at your option)
-# any later version.
+# SPDX-License-Identifier: GPL-3.0-or-later
 #
-# GNU Radio is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with GNU Radio; see the file COPYING.  If not, write to
-# the Free Software Foundation, Inc., 51 Franklin Street,
-# Boston, MA 02110-1301, USA.
 
 #
 # Gang - Here's a simple script that demonstrates spectrum inversion
diff --git a/gr-audio/examples/python/test_resampler.py b/gr-audio/examples/python/test_resampler.py
index daca7fc717..760b4f38d4 100644
--- a/gr-audio/examples/python/test_resampler.py
+++ b/gr-audio/examples/python/test_resampler.py
@@ -4,20 +4,8 @@
 #
 # This file is part of GNU Radio
 #
-# GNU Radio is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 3, or (at your option)
-# any later version.
+# SPDX-License-Identifier: GPL-3.0-or-later
 #
-# GNU Radio is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with GNU Radio; see the file COPYING.  If not, write to
-# the Free Software Foundation, Inc., 51 Franklin Street,
-# Boston, MA 02110-1301, USA.
 #
 
 from __future__ import print_function