chore(license): add headers to project files

- document copyright and GPL-3.0-or-later licensing
- cover CMake flags and module export definitions

1 files changed, 27 insertions, 0 deletions

diff --git a/include/GFModuleExport.h b/include/GFModuleExport.h
index 2a669cc..2f298ed 100644
--- a/include/GFModuleExport.h
+++ b/include/GFModuleExport.h
@@ -1,3 +1,30 @@
+/**
+ * Copyright (C) 2021-2026 Saturneric <[email protected]>
+ *
+ * This file is part of GpgFrontend.
+ *
+ * GpgFrontend 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 of the License, or
+ * (at your option) any later version.
+ *
+ * GpgFrontend 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 GpgFrontend. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The initial version of the source code is inherited from
+ * the gpg4usb project, which is under GPL-3.0-or-later.
+ *
+ * All the source code of GpgFrontend was modified and released by
+ * Saturneric <[email protected]> starting on May 12, 2021.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ */
 
 #ifndef GF_MODULE_EXPORT_H
 #define GF_MODULE_EXPORT_H