sphinx: ada: port to Sphinx

gcc/ada/ChangeLog:

	* doc/gnat-style.rst: Moved to...
	* doc/gnat-style/index.rst: ...here.
	* doc/gnat_rm.rst: Moved to...
	* doc/gnat_rm/index.rst: ...here.
	* doc/gnat_ugn.rst: Moved to...
	* doc/gnat_ugn/index.rst: ...here.
	* doc/share/latex_elements.py: Moved to...
	* doc/share/ada_latex_elements.py: ...here.
	* gcc-interface/Make-lang.in:
	* doc/Makefile: Removed.
	* doc/share/conf.py: Removed.
	* doc/share/gnu_free_documentation_license.rst: Removed.
	* gnat-style.texi: Removed.
	* gnat_rm.texi: Removed.
	* gnat_ugn.texi: Removed.
	* doc/gnat-style/conf.py: New file.
	* doc/gnat-style/gnu_free_documentation_license.rst: New file.
	* doc/gnat_rm/conf.py: New file.
	* doc/gnat_rm/gnu_free_documentation_license.rst: New file.
	* doc/gnat_ugn/conf.py: New file.
	* doc/gnat_ugn/gnu_free_documentation_license.rst: New file.
	* doc/share/adabaseconf.py: New file.
	* doc/gnat_rm/security_hardening_features.rst: Add role.
	* doc/gnat_ugn/platform_specific_information.rst: Remove
	  duplicate definition of |nbsp|.

4 files changed, 90 insertions, 6 deletions

diff --git a/gcc/ada/doc/gnat_ugn/conf.py b/gcc/ada/doc/gnat_ugn/conf.py
new file mode 100644
index 0000000..94e3c07
--- /dev/null
+++ b/gcc/ada/doc/gnat_ugn/conf.py
@@ -0,0 +1,26 @@
+# Configuration file for the Sphinx documentation builder.
+
+import sys
+sys.path.append('../share')
+
+from adabaseconf import *
+
+name = 'gnat_ugn'
+project = "GNAT User's Guide for Native Platforms"
+authors = 'AdaCore'
+
+set_latex_elements(latex_elements, project)
+
+# Grouping the document tree into Texinfo files. List of tuples
+# (source start file, target name, title, author,
+#  dir menu entry, description, category)
+latex_documents = [
+  ('index', f'{name}.tex', project, authors, 'manual'),
+]
+
+texinfo_documents = [
+  ('index', name, project, authors, None, None, None, True)
+]
+
+tags.add(get_gnat_build_type())
+set_common(name, globals())
diff --git a/gcc/ada/doc/gnat_ugn/gnu_free_documentation_license.rst b/gcc/ada/doc/gnat_ugn/gnu_free_documentation_license.rst
new file mode 100644
index 0000000..33c62cf
--- /dev/null
+++ b/gcc/ada/doc/gnat_ugn/gnu_free_documentation_license.rst
@@ -0,0 +1 @@
+.. include:: ../../../../doc/gnu_free_documentation_license.rst
diff --git a/gcc/ada/doc/gnat_ugn/index.rst b/gcc/ada/doc/gnat_ugn/index.rst
new file mode 100644
index 0000000..d3d1dac
--- /dev/null
+++ b/gcc/ada/doc/gnat_ugn/index.rst
@@ -0,0 +1,63 @@
+GNAT User's Guide for Native Platforms
+======================================
+
+.. only:: not latex
+
+    *GNAT, The GNU Ada Development Environment*
+
+    .. only:: PRO
+
+       *GNAT Pro Edition*
+
+       | Version |version|
+       | Date: |today|
+
+    .. only:: GPL
+
+       *GNAT Community Edition*
+
+       | Version |version|
+       | Date: |today|
+
+    .. only:: FSF
+
+       .. raw:: texinfo
+
+          @include gcc-common.texi
+          GCC version @value{version-GCC}@*
+
+    AdaCore
+
+    Permission is granted to copy, distribute and/or modify this document
+    under the terms of the GNU Free Documentation License, Version 1.3 or
+    any later version published by the Free Software Foundation; with no
+    Invariant Sections, with the Front-Cover Texts being
+    "GNAT User's Guide for Native Platforms",
+    and with no Back-Cover Texts.  A copy of the license is
+    included in the section entitled :ref:`gnu_fdl`.
+
+.. toctree::
+   :maxdepth: 3
+   :numbered:
+
+   about_this_guide
+   getting_started_with_gnat
+   the_gnat_compilation_model
+   building_executable_programs_with_gnat
+   gnat_utility_programs
+   gnat_and_program_execution
+
+.. raw:: latex
+
+   \appendix
+
+.. toctree::
+   :maxdepth: 3
+
+   A. Platform-Specific Information <platform_specific_information>
+   B. Example of Binder Output <example_of_binder_output>
+   C. Elaboration Order Handling in GNAT <elaboration_order_handling_in_gnat>
+   D. Inline Assembler <inline_assembler>
+   E. GNU Free Documentation License <gnu_free_documentation_license>
+
+
diff --git a/gcc/ada/doc/gnat_ugn/platform_specific_information.rst b/gcc/ada/doc/gnat_ugn/platform_specific_information.rst
index 4d25dea..3ada65d 100644
--- a/gcc/ada/doc/gnat_ugn/platform_specific_information.rst
+++ b/gcc/ada/doc/gnat_ugn/platform_specific_information.rst
@@ -1,11 +1,5 @@
 .. role:: switch(samp)
 
-.. -- Non-breaking space in running text
-   -- E.g. Ada |nbsp| 95
-
-.. |nbsp| unicode:: 0xA0
-   :trim:
-
 .. _Platform_Specific_Information:
 
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