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diff --git a/gcc/diagnostics/context-options.h b/gcc/diagnostics/context-options.h
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+/* Declare enums for diagnostics::context and related types.
+   Copyright (C) 2000-2025 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC 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.
+
+GCC 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 GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#ifndef GCC_DIAGNOSTICS_CONTEXT_OPTIONS_H
+#define GCC_DIAGNOSTICS_CONTEXT_OPTIONS_H
+
+/* An enum for controlling what units to use for the column number
+   when diagnostics are output, used by the -fdiagnostics-column-unit option.
+   Tabs will be expanded or not according to the value of -ftabstop.  The origin
+   (default 1) is controlled by -fdiagnostics-column-origin.  */
+
+enum diagnostics_column_unit
+{
+  /* The default from GCC 11 onwards: display columns.  */
+  DIAGNOSTICS_COLUMN_UNIT_DISPLAY,
+
+  /* The behavior in GCC 10 and earlier: simple bytes.  */
+  DIAGNOSTICS_COLUMN_UNIT_BYTE
+};
+
+/* An enum for controlling how to print non-ASCII characters/bytes when
+   a diagnostic suggests escaping the source code on output.  */
+
+enum diagnostics_escape_format
+{
+  /* Escape non-ASCII Unicode characters in the form <U+XXXX> and
+     non-UTF-8 bytes in the form <XX>.  */
+  DIAGNOSTICS_ESCAPE_FORMAT_UNICODE,
+
+  /* Escape non-ASCII bytes in the form <XX> (thus showing the underlying
+     encoding of non-ASCII Unicode characters).  */
+  DIAGNOSTICS_ESCAPE_FORMAT_BYTES
+};
+
+/* Enum for overriding the standard output format.  */
+
+enum diagnostics_output_format
+{
+  /* The default: textual output.  */
+  DIAGNOSTICS_OUTPUT_FORMAT_TEXT,
+
+  /* SARIF-based output, as JSON to stderr.  */
+  DIAGNOSTICS_OUTPUT_FORMAT_SARIF_STDERR,
+
+  /* SARIF-based output, to a JSON file.  */
+  DIAGNOSTICS_OUTPUT_FORMAT_SARIF_FILE
+};
+
+/* An enum for controlling how diagnostic paths should be printed.  */
+enum diagnostic_path_format
+{
+  /* Don't print diagnostic paths.  */
+  DPF_NONE,
+
+  /* Print diagnostic paths by emitting a separate "note" for every event
+     in the path.  */
+  DPF_SEPARATE_EVENTS,
+
+  /* Print diagnostic paths by consolidating events together where they
+     are close enough, and printing such runs of events with multiple
+     calls to diagnostic_show_locus, showing the individual events in
+     each run via labels in the source.  */
+  DPF_INLINE_EVENTS
+};
+
+/* An enum for capturing values of GCC_EXTRA_DIAGNOSTIC_OUTPUT,
+   and for -fdiagnostics-parseable-fixits.  */
+
+enum diagnostics_extra_output_kind
+{
+  /* No extra output, or an unrecognized value.  */
+  EXTRA_DIAGNOSTIC_OUTPUT_none,
+
+  /* Emit fix-it hints using the "fixits-v1" format, equivalent to
+     -fdiagnostics-parseable-fixits.  */
+  EXTRA_DIAGNOSTIC_OUTPUT_fixits_v1,
+
+  /* Emit fix-it hints using the "fixits-v2" format.  */
+  EXTRA_DIAGNOSTIC_OUTPUT_fixits_v2
+};
+
+/* Values for -fdiagnostics-text-art-charset=.  */
+
+enum diagnostic_text_art_charset
+{
+  /* No text art diagrams shall be emitted.  */
+  DIAGNOSTICS_TEXT_ART_CHARSET_NONE,
+
+  /* Use pure ASCII for text art diagrams.  */
+  DIAGNOSTICS_TEXT_ART_CHARSET_ASCII,
+
+  /* Use ASCII + conservative use of other unicode characters
+     in text art diagrams.  */
+  DIAGNOSTICS_TEXT_ART_CHARSET_UNICODE,
+
+  /* Use Emoji.  */
+  DIAGNOSTICS_TEXT_ART_CHARSET_EMOJI
+};
+
+#endif /* ! GCC_DIAGNOSTICS_CONTEXT_OPTIONS_H */