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diff --git a/gdb/dwarf2/line-program.h b/gdb/dwarf2/line-program.h
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+/* DWARF 2 debugging format support for GDB.
+
+   Copyright (C) 1994-2025 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program 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.
+
+   This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef GDB_DWARF2_LINE_PROGRAM_H
+#define GDB_DWARF2_LINE_PROGRAM_H
+
+/* Decode the Line Number Program (LNP) for the given line_header
+   structure and CU.  The actual information extracted and the type
+   of structures created from the LNP depends on the value of PST.
+
+   FND holds the CU file name and directory, if known.
+   It is used for relative paths in the line table.
+
+   NOTE: It is important that psymtabs have the same file name (via
+   strcmp) as the corresponding symtab.  Since the directory is not
+   used in the name of the symtab we don't use it in the name of the
+   psymtabs we create.  E.g. expand_line_sal requires this when
+   finding psymtabs to expand.  A good testcase for this is
+   mb-inline.exp.
+
+   LOWPC is the lowest address in CU (or 0 if not known).
+
+   Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
+   for its PC<->lines mapping information.  Otherwise only the filename
+   table is read in.  */
+
+extern void dwarf_decode_lines (struct line_header *lh,
+				struct dwarf2_cu *cu,
+				unrelocated_addr lowpc, bool decode_mapping);
+
+#endif /* GDB_DWARF2_LINE_PROGRAM_H */