Bump Doxygen to 1.16.1 (#6752)

* Bump Doxygen version to 1.16.1

* Update Doxyfile

* Enable parallel processing

.github/workflows/documentation-build.yml

@@ -33,7 +33,7 @@ jobs:
       - name: Install Doxygen
         uses: ssciwr/doxygen-install@v2
         with:
-          version: "1.14.0"
+          version: "1.16.1"
 
       - name: Update Doxygen Configuration
         run: |

Doxyfile

@@ -1,4 +1,4 @@
-# Doxyfile 1.14.0
+# Doxyfile 1.16.1
 
 # This file describes the settings to be used by the documentation system
 # Doxygen (www.doxygen.org) for a project.
@@ -361,6 +361,20 @@ EXTENSION_MAPPING      =
 
 MARKDOWN_SUPPORT       = YES
 
+# If the MARKDOWN_STRICT tag is enabled then Doxygen treats text in comments as
+# Markdown formatted also in cases where Doxygen's native markup format
+# conflicts with that of Markdown. This is only relevant in cases where
+# backticks are used. Doxygen's native markup style allows a single quote to end
+# a text fragment started with a backtick and then treat it as a piece of quoted
+# text, whereas in Markdown such text fragment is treated as verbatim and only
+# ends when a second matching backtick is found. Also, Doxygen's native markup
+# format requires double quotes to be escaped when they appear in a backtick
+# section, whereas this is not needed for Markdown.
+# The default value is: YES.
+# This tag requires that the tag MARKDOWN_SUPPORT is set to YES.
+
+MARKDOWN_STRICT        = YES
+
 # When the TOC_INCLUDE_HEADINGS tag is set to a non-zero value, all headings up
 # to that level are automatically included in the table of contents, even if
 # they do not have an id attribute.
@@ -392,8 +406,8 @@ AUTOLINK_SUPPORT       = YES
 
 # This tag specifies a list of words that, when matching the start of a word in
 # the documentation, will suppress auto links generation, if it is enabled via
-# AUTOLINK_SUPPORT. This list does not affect links explicitly created using \#
+# AUTOLINK_SUPPORT. This list does not affect links explicitly created using #
-# or the \link or commands.
+# or the \link or \ref commands.
 # This tag requires that the tag AUTOLINK_SUPPORT is set to YES.
 
 AUTOLINK_IGNORE_WORDS  =
@@ -510,9 +524,9 @@ LOOKUP_CACHE_SIZE      = 0
 # which effectively disables parallel processing. Please report any issues you
 # encounter. Generating dot graphs in parallel is controlled by the
 # DOT_NUM_THREADS setting.
-# Minimum value: 0, maximum value: 32, default value: 1.
+# Minimum value: 0, maximum value: 512, default value: 1.
 
-NUM_PROC_THREADS       = 1
+NUM_PROC_THREADS       = 0
 
 # If the TIMESTAMP tag is set different from NO then each generated page will
 # contain the date or date and time when the page was generated. Setting this to
@@ -779,6 +793,27 @@ GENERATE_BUGLIST       = YES
 
 GENERATE_DEPRECATEDLIST= YES
 
+# The GENERATE_REQUIREMENTS tag can be used to enable (YES) or disable (NO) the
+# requirements page. When enabled, this page is automatically created when at
+# least one comment block with a \requirement command appears in the input.
+# The default value is: YES.
+
+GENERATE_REQUIREMENTS  = YES
+
+# The REQ_TRACEABILITY_INFO tag controls if traceability information is shown on
+# the requirements page (only relevant when using \requirement comment blocks).
+# The setting NO will disable the traceablility information altogether. The
+# setting UNSATISFIED_ONLY will show a list of requirements that are missing a
+# satisfies relation (through the command: \satisfies). Similarly the setting
+# UNVERIFIED_ONLY will show a list of requirements that are missing a verifies
+# relation (through the command: \verifies). Setting the tag to YES (the
+# default) will show both lists if applicable.
+# Possible values are: YES, NO, UNSATISFIED_ONLY and UNVERIFIED_ONLY.
+# The default value is: YES.
+# This tag requires that the tag GENERATE_REQUIREMENTS is set to YES.
+
+REQ_TRACEABILITY_INFO  = YES
+
 # The ENABLED_SECTIONS tag can be used to enable conditional documentation
 # sections, marked by \if <section_label> ... \endif and \cond <section_label>
 # ... \endcond blocks.
@@ -1887,7 +1922,7 @@ USE_MATHJAX            = NO
 # regards to the different settings, so it is possible that also other MathJax
 # settings have to be changed when switching between the different MathJax
 # versions.
-# Possible values are: MathJax_2 and MathJax_3.
+# Possible values are: MathJax_2, MathJax_3 and MathJax_4.
 # The default value is: MathJax_2.
 # This tag requires that the tag USE_MATHJAX is set to YES.
 
@@ -1896,9 +1931,10 @@ MATHJAX_VERSION        = MathJax_2
 # When MathJax is enabled you can set the default output format to be used for
 # the MathJax output. For more details about the output format see MathJax
 # version 2 (see:
-# http://docs.mathjax.org/en/v2.7-latest/output.html) and MathJax version 3
+# https://docs.mathjax.org/en/v2.7/output.html), MathJax version 3 (see:
+# https://docs.mathjax.org/en/v3.2/output/index.html) and MathJax version 4
 # (see:
-# http://docs.mathjax.org/en/latest/web/components/output.html).
+# https://docs.mathjax.org/en/v4.0/output/index.htm).
 # Possible values are: HTML-CSS (which is slower, but has the best
 # compatibility. This is the name for Mathjax version 2, for MathJax version 3
 # this will be translated into chtml), NativeMML (i.e. MathML. Only supported
@@ -1911,36 +1947,50 @@ MATHJAX_VERSION        = MathJax_2
 MATHJAX_FORMAT         = HTML-CSS
 
 # When MathJax is enabled you need to specify the location relative to the HTML
-# output directory using the MATHJAX_RELPATH option. The destination directory
+# output directory using the MATHJAX_RELPATH option. For Mathjax version 2 the
-# should contain the MathJax.js script. For instance, if the mathjax directory
+# destination directory should contain the MathJax.js script. For instance, if
-# is located at the same level as the HTML output directory, then
+# the mathjax directory is located at the same level as the HTML output
-# MATHJAX_RELPATH should be ../mathjax. The default value points to the MathJax
+# directory, then MATHJAX_RELPATH should be ../mathjax.s For Mathjax versions 3
-# Content Delivery Network so you can quickly see the result without installing
+# and 4 the destination directory should contain the tex-<format>.js script
-# MathJax. However, it is strongly recommended to install a local copy of
+# (where <format> is either chtml or svg). The default value points to the
-# MathJax from https://www.mathjax.org before deployment. The default value is:
+# MathJax Content Delivery Network so you can quickly see the result without
+# installing MathJax. However, it is strongly recommended to install a local
+# copy of MathJax from https://www.mathjax.org before deployment. The default
+# value is:
 # - in case of MathJax version 2: https://cdn.jsdelivr.net/npm/mathjax@2
 # - in case of MathJax version 3: https://cdn.jsdelivr.net/npm/mathjax@3
+# - in case of MathJax version 4: https://cdn.jsdelivr.net/npm/mathjax@4
 # This tag requires that the tag USE_MATHJAX is set to YES.
 
 MATHJAX_RELPATH        =
 
 # The MATHJAX_EXTENSIONS tag can be used to specify one or more MathJax
 # extension names that should be enabled during MathJax rendering. For example
-# for MathJax version 2 (see
+# for MathJax version 2 (see https://docs.mathjax.org/en/v2.7/tex.html):
-# https://docs.mathjax.org/en/v2.7-latest/tex.html#tex-and-latex-extensions):
 # MATHJAX_EXTENSIONS = TeX/AMSmath TeX/AMSsymbols
 # For example for MathJax version 3 (see
-# http://docs.mathjax.org/en/latest/input/tex/extensions/index.html):
+# https://docs.mathjax.org/en/v3.2/input/tex/extensions/):
 # MATHJAX_EXTENSIONS = ams
+# For example for MathJax version 4 (see
+# https://docs.mathjax.org/en/v4.0/input/tex/extensions/):
+# MATHJAX_EXTENSIONS = units
+# Note that for Mathjax version 4 quite a few extensions are already
+# automatically loaded. To disable a package in Mathjax version 4 one can use
+# the package name prepended with a minus sign (- like MATHJAX_EXTENSIONS +=
+# -textmacros)
 # This tag requires that the tag USE_MATHJAX is set to YES.
 
 MATHJAX_EXTENSIONS     =
 
 # The MATHJAX_CODEFILE tag can be used to specify a file with JavaScript pieces
-# of code that will be used on startup of the MathJax code. See the MathJax site
+# of code that will be used on startup of the MathJax code. See the Mathjax site
-# (see:
+# for more details:
-# http://docs.mathjax.org/en/v2.7-latest/output.html) for more details. For an
+# - MathJax version 2 (see:
-# example see the documentation.
+# https://docs.mathjax.org/en/v2.7/)
+# - MathJax version 3 (see:
+# https://docs.mathjax.org/en/v3.2/)
+# - MathJax version 4 (see:
+# https://docs.mathjax.org/en/v4.0/) For an example see the documentation.
 # This tag requires that the tag USE_MATHJAX is set to YES.
 
 MATHJAX_CODEFILE       =
@@ -2601,7 +2651,7 @@ HAVE_DOT               = YES
 # processors available in the system. You can set it explicitly to a value
 # larger than 0 to get control over the balance between CPU load and processing
 # speed.
-# Minimum value: 0, maximum value: 32, default value: 0.
+# Minimum value: 0, maximum value: 512, default value: 0.
 # This tag requires that the tag HAVE_DOT is set to YES.
 
 DOT_NUM_THREADS        = 0