.clang-format

+# This file should be kept in sync with the one in dynare.git (which also
+# contains more explanations).
+Language: Cpp
+Standard: c++20
+ColumnLimit: 100
+BasedOnStyle: GNU
+AllowShortFunctionsOnASingleLine: None
+AlwaysBreakTemplateDeclarations: Yes
+BreakConstructorInitializers: AfterColon
+BreakInheritanceList: AfterColon
+Cpp11BracedListStyle: true
+DeriveLineEnding: false
+IndentPPDirectives: AfterHash
+InsertNewlineAtEOF: true
+PackConstructorInitializers: NextLine
+PPIndentWidth: 1
+PointerAlignment: Left
+# RemoveParentheses: ReturnStatement
+# RemoveSemicolon: true
+SpaceAfterTemplateKeyword: false
+SpaceBeforeParens: ControlStatements
+SpaceBeforeCpp11BracedList: true

.clang-tidy

+# TODO: add the following check families:
+# - bugprone-*
+# - cppcoreguidelines-
+
+# NB: as of clang-tidy 16, we get several false positives inside boost, notably this one:
+#  https://github.com/llvm/llvm-project/issues/40486
+
+Checks: 'performance-*,modernize-*,-modernize-use-trailing-return-type,-clang-diagnostic-unqualified-std-cast-call'

.gitignore

-# For checking that no file has been unduly ignored, run:
-# $ git ls-files -i --exclude-per-directory=.gitignore
-# Any file that is displayed should be removed from the ignore list
-# (possibly by an exclusion rule beginning with an exclamation mark)
-
-# Generic ignore rules
 *~
-*.o
-*.a
-*.fig
-\#*\#
-
-# Build system rules
-.deps
-Makefile
-Makefile.in
-configure
-config.log
-config.status
-aclocal.m4
-autom4te.cache
-config.guess
-config.sub
-depcomp
-install-sh
-/missing
-/compile
-ylwrap
-ar-lib
-
-# Preprocessor
-/src/dynare_m
-/src/dynare_m.exe
-/src/DynareBison.cc
-/src/DynareBison.hh
-/src/FlexLexer.h
-/src/DynareFlex.cc
-/src/location.hh
-/src/position.hh
-/src/stack.hh
-/src/macro/MacroBison.cc
-/src/macro/MacroBison.hh
-/src/macro/MacroFlex.cc
-/src/macro/location.hh
-/src/macro/position.hh
-/src/macro/stack.hh
-/src/doc/
-
-# macOS stuff
-.DS_Store

.gitlab-ci.yml

+variables:
+  TERM: linux
+  MINGW64_BOOST_VERSION: 1.88.0-2
+  WGET_OPTIONS: '--no-verbose --no-use-server-timestamps --retry-connrefused --retry-on-host-error'
+  # To ensure that "false && true" fails, see https://gitlab.com/gitlab-org/gitlab-runner/-/issues/25394#note_412609647
+  FF_ENABLE_BASH_EXIT_CODE_CHECK: 'true'
+
+build_linux_x86_64:
+  stage: build
+  script:
+    - meson setup -D buildtype=release build
+    - meson compile -C build -v
+  artifacts:
+    paths:
+      - build/src/dynare-preprocessor
+
+build_linux_arm64:
+  stage: build
+  script:
+    - meson setup -D buildtype=release --cross-file scripts/linux-arm64-cross.ini build
+    - meson compile -C build -v
+  artifacts:
+    paths:
+      - build/src/dynare-preprocessor
+
+build_windows_x86_64:
+  stage: build
+  script:
+    - mkdir -p tarballs
+    - '[[ -f tarballs/mingw-w64-x86_64-boost-$MINGW64_BOOST_VERSION-any.pkg.tar.zst ]] || wget $WGET_OPTIONS -P tarballs http://repo.msys2.org/mingw/x86_64/mingw-w64-x86_64-boost-$MINGW64_BOOST_VERSION-any.pkg.tar.zst'
+    - mkdir -p deps
+    - tar xf tarballs/mingw-w64-x86_64-boost-$MINGW64_BOOST_VERSION-any.pkg.tar.zst --directory deps
+    - echo -e "[properties]\nboost_root = '$(pwd)/deps/mingw64/'" > boost.ini
+    - meson setup -D buildtype=release --cross-file scripts/windows-cross.ini --cross-file boost.ini build
+    - meson compile -C build -v
+  cache:
+    # This cache is shared between all branches, to save space
+    key: $CI_JOB_NAME
+    paths:
+      - tarballs/
+  artifacts:
+    paths:
+      - build/src/dynare-preprocessor.exe
+
+build_macos_x86_64:
+  stage: build
+  tags:
+    - macOS
+  script:
+    - arch -x86_64 meson setup -D buildtype=release --native-file scripts/homebrew-native-x86_64.ini build
+    - arch -x86_64 meson compile -C build -v
+  artifacts:
+    paths:
+      - build/src/dynare-preprocessor
+
+build_macos_arm64:
+  stage: build
+  tags:
+    - macOS
+  script:
+    - export PATH="/opt/homebrew/bin:$PATH"
+    - arch -arm64 meson setup -D buildtype=release --native-file scripts/homebrew-native-arm64.ini build
+    - arch -arm64 meson compile -C build -v
+  artifacts:
+    paths:
+      - build/src/dynare-preprocessor
+
+test_clang_format:
+  stage: test
+  script:
+    - meson setup build-clang-format
+    - ninja -C build-clang-format clang-format-check
+  needs: []
+
+test_clang_tidy:
+  stage: test
+  script:
+    # Hack needed for meson < 1.6.0 which only looks for unversioned clang-tidy
+    - mkdir -p ~/.local/bin && ln -s /usr/bin/clang-tidy-19 ~/.local/bin/clang-tidy
+    - export PATH="$HOME/.local/bin:$PATH"
+    - meson setup build-clang-tidy
+    # Generate Flex and Bison files
+    - meson compile -C build-clang-tidy
+    - ninja -C build-clang-tidy clang-tidy
+  needs: []
+  when: manual

COPYING

                     GNU GENERAL PUBLIC LICENSE
                        Version 3, 29 June 2007
 
- Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.
 
@@ -645,7 +645,7 @@ the "copyright" line and a pointer to where the full notice is found.
     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/>.
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 Also add information on how to contact you by electronic and paper mail.
 
@@ -664,11 +664,11 @@ might be different; for a GUI interface, you would use an "about box".
   You should also get your employer (if you work as a programmer) or school,
 if any, to sign a "copyright disclaimer" for the program, if necessary.
 For more information on this, and how to apply and follow the GNU GPL, see
-<http://www.gnu.org/licenses/>.
+<https://www.gnu.org/licenses/>.
 
   The GNU General Public License does not permit incorporating your program
 into proprietary programs.  If your program is a subroutine library, you
 may consider it more useful to permit linking proprietary applications with
 the library.  If this is what you want to do, use the GNU Lesser General
 Public License instead of this License.  But first, please read
-<http://www.gnu.org/philosophy/why-not-lgpl.html>.
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

Makefile.am

-SUBDIRS = src
-
-ACLOCAL_AMFLAGS = -I m4
-
-EXTRA_DIST = \
-	license.txt \
-	COPYING
-
-dist-hook:
-	rm -rf `find $(distdir) -name '.git*'`
-

README.md

 <a name="logo"/>
 <div align="center">
-<a href="http://www.dynare.org/" target="_blank">
-<img src="http://www.dynare.org/img/dynare.png" alt="Dynare Logo"></img>
+<a href="https://www.dynare.org/" target="_blank">
+<img src="https://www.dynare.org/assets/images/logo/dlogo.svg" alt="Dynare Logo"></img>
 </a>
 </div>
 
@@ -9,12 +9,9 @@
 
 The Dynare Preprocessor defines the Dynare model language. It takes in a `.mod`
 file, computes the derivatives of the model represented therein, and produces
-Matlab/Octave, C, Julia, or JSON output.
-
-There is more to come here. For the moment, see the [Dynare
-repository](https://github.com/DynareTeam/dynare)
+MATLAB/Octave, Julia, or JSON output.
 
 # License
 
 Most of the source files are covered by the GNU General Public Licence version
-3 or later. There are some exceptions. See [license.txt](license.txt) for specifics.
+3 or later. There are some exceptions, see the respective file headers.

configure.ac

-dnl Process this file with autoconf to produce a configure script.
-
-dnl Copyright (C) 2009-2018 Dynare Team
-dnl
-dnl This file is part of Dynare.
-dnl
-dnl Dynare is free software: you can redistribute it and/or modify
-dnl it under the terms of the GNU General Public License as published by
-dnl the Free Software Foundation, either version 3 of the License, or
-dnl (at your option) any later version.
-dnl
-dnl Dynare is distributed in the hope that it will be useful,
-dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
-dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-dnl GNU General Public License for more details.
-dnl
-dnl You should have received a copy of the GNU General Public License
-dnl along with Dynare.  If not, see <http://www.gnu.org/licenses/>.
-
-AC_PREREQ([2.62])
-AC_INIT([dynare-preprocessor], [1.0-unstable])
-AC_CONFIG_SRCDIR([src/DynareMain.cc])
-AM_INIT_AUTOMAKE([1.11 -Wall -Wno-portability foreign no-dist-gzip dist-xz tar-pax])
-
-AC_PROG_CC
-AC_PROG_CXX
-
-AC_CANONICAL_HOST
-case ${host_os} in
-  *mingw32*)
-    # On mingw32, we don't want dynamic libgcc
-    # Note that static-libstdc++ is only supported since GCC 4.5 (but generates no error on older versions)
-    LDFLAGS="$LDFLAGS -static-libgcc -static-libstdc++ -static-libgfortran"
-    have_windows="yes"
-    ;;
-  *cygwin*)
-    AC_MSG_WARN([You are compiling for the Cygwin target. This means that the preprocessor will])
-    AC_MSG_WARN([not run from MATLAB unless you add the Cygwin DLL to the path.])
-    AC_MSG_WARN([This is probably not what you want. Consider using a MinGW cross-compiler.])
-    have_windows="yes"
-    ;;
-esac
-
-# Use C++ for testing headers
-AC_LANG([C++])
-
-CXXFLAGS="$CXXFLAGS -Wall -Wno-parentheses"
-
-# If default 'ar' is not available, try to find one with a host prefix (see ticket #145)
-AC_CHECK_PROGS([AR], [ar ${host_alias}-ar])
-
-AC_PROG_RANLIB
-AM_PROG_AR
-
-AM_PROG_LEX
-# Hack to get lex include dir, ticket #575
-AC_PATH_PROG([LEXPATH], [$LEX])
-AC_SUBST([LEXINC], [`eval "echo $LEXPATH | sed 's|\(.*\)$LEX$|\1../include|'"`])
-
-AC_CHECK_PROG([YACC], [bison], [bison])
-if test "x$YACC" = "x"; then
-  unset YACC # AM_MISSING_PROG needs an unset variable: an empty variable won't do
-  AM_MISSING_PROG([YACC], [bison])
-fi
-
-# We need 1.36 because of unordered_{set,hash} used by Dynare++
-AX_BOOST_BASE([1.36], [], [AC_MSG_ERROR([Can't find Boost >= 1.36])])
-
-CPPFLAGS_SAVED="$CPPFLAGS"
-CPPFLAGS="$CPPFLAGS $BOOST_CPPFLAGS"
-AC_CHECK_HEADERS([boost/graph/adjacency_list.hpp], [], [AC_MSG_ERROR([Can't find Boost Graph Library])])
-AC_CHECK_HEADERS([boost/algorithm/string/trim.hpp], [], [AC_MSG_ERROR([Can't find Boost String Library])])
-AC_CHECK_HEADERS([boost/algorithm/string/split.hpp], [], [AC_MSG_ERROR([Can't find Boost String Library])])
-AC_CHECK_HEADERS([boost/lexical_cast.hpp], [], [AC_MSG_ERROR([Can't find Boost Lexical Cast Header])])
-CPPFLAGS="$CPPFLAGS_SAVED"
-
-# Don't use deprecated hash structures
-AC_DEFINE([BOOST_NO_HASH], [], [Don't use deprecated STL hash structures])
-
-AC_CHECK_PROG([DOXYGEN], [doxygen], [doxygen])
-AM_CONDITIONAL([HAVE_DOXYGEN], [test "x$DOXYGEN" != "x"])
-
-AC_CONFIG_FILES([Makefile
-                 src/Makefile
-                 src/macro/Makefile
-])
-
-if test "x$DOXYGEN" != "x"; then
-  BUILD_DYNARE_PREPROC_DOC="yes"
-else
-  BUILD_DYNARE_PREPROC_DOC="no (missing doxygen)"
-fi
-
-AC_MSG_NOTICE([
-
-The Dynare Preprocessor is now configured to build...
-
-Binaries (with "make")
- Dynare preprocessor:                   yes
-
-HTML documentation (with "make html"):
- Dynare preprocessor developer doc:     $BUILD_DYNARE_PREPROC_DOC
-
-])
-
-AC_OUTPUT

doc/macroprocessor/new-design.svg

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+         xml:space="preserve"><tspan
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+           id="tspan4498"
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+           id="tspan4500"
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+       id="rect5596"
+       width="634.28571"
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+    <text
+       xml:space="preserve"
+       style="font-size:20px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;font-family:Arial"
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+       sodipodi:linespacing="125%"><tspan
+         sodipodi:role="line"
+         id="tspan6569"
+         x="404.28574"
+         y="232.66591">Dynare preprocessor</tspan></text>
+  </g>
+</svg>

doc/meson.build

+latexmk_exe = find_program('latexmk', required : false, disabler : true)
+
+# We have to set TEXINPUTS because the current directory is not the source
+# directory when latexmk is invoked (and using the -cd option in combination
+# with -outdir/-auxdir does not work in all cases because @OUTDIR@ and
+# @PRIVATE_DIR@ can be relative paths)
+
+# Without the -g flag, latexmk remembers a previous build failure and will refuse
+# to recompile even if the error has been fixed in the TeX source
+
+latexmk_command = [ latexmk_exe, '-pdf', '-g', '-outdir=@OUTDIR@', '-auxdir=@PRIVATE_DIR@', '@INPUT@']
+
+# The \graphicspath{} command does not compute directories relative to TEXINPUTS,
+# so add these manually
+logos_dir = meson.current_source_dir() / 'logos'
+
+macroprocessor_pdf = custom_target('macroprocessor.pdf',
+                                   output : 'macroprocessor.pdf',
+                                   input : 'macroprocessor/macroprocessor.tex',
+                                   command : latexmk_command,
+                                   env : { 'TEXINPUTS': meson.current_source_dir()
+                                                        + '/macroprocessor:' + logos_dir + ':' },
+                                   depend_files : [ 'macroprocessor/new-design.pdf',
+                                                    'logos/dlogo.png' ],
+                                   build_by_default : false,
+                                   install : true,
+                                   install_dir : 'share/doc/dynare')
+
+preprocessor_pdf = custom_target('preprocessor.pdf',
+                                 output : 'preprocessor.pdf',
+                                 input : 'preprocessor/preprocessor.tex',
+                                 command : latexmk_command,
+                                 env : { 'TEXINPUTS': meson.current_source_dir() + '/preprocessor:'
+                                                      + logos_dir + ':' },
+                                 depend_files : [ 'preprocessor/expr.png',
+                                                  'preprocessor/expr-sharing.png',
+                                                  'preprocessor/json-preprocessor.png',
+                                                  'preprocessor/matrices.png',
+                                                  'preprocessor/overview.png', 'logos/dlogo.png' ],
+                                 build_by_default : false,
+                                 install : true,
+                                 install_dir : 'share/doc/dynare')

doc/preprocessor/Makefile.am

-if HAVE_PDFLATEX
-if HAVE_BEAMER
-pdf-local: preprocessor.pdf
-endif
-endif
-
-SRC = preprocessor.tex expr.png expr-sharing.png matrices.png overview.png json-preprocessor.png
-
-EXTRA_DIST = $(SRC)
-
-preprocessor.pdf: $(SRC)
-	$(PDFLATEX) preprocessor
-	$(PDFLATEX) preprocessor
-
-clean-local:
-	rm -f *.pdf *.toc *.aux *.log *.nav *.snm *.vrb *.out *~

license.txt

-Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
-Upstream-Name: Dynare-preprocessor
-Upstream-Contact: Dynare Team, whose members in 2018 are:
-                  Stéphane Adjemian <stephane.adjemian@univ-lemans.fr>
-                  Houtan Bastani <houtan@dynare.org>
-                  Michel Juillard <michel.juillard@mjui.fr>
-                  Frédéric Karamé <frederic.karame@univ-lemans.fr>
-                  Junior Maih <junior.maih@gmail.com>
-                  Ferhat Mihoubi <fmihoubi@univ-evry.fr>
-                  Johannes Pfeifer <jpfeifer@gmx.de>
-                  Marco Ratto <marco.ratto@ec.europa.eu>
-                  Sébastien Villemot <sebastien.villemot@sciencespo.fr>
-Source: http://www.dynare.org
-
-Files: *
-Copyright: 1996-2018 Dynare Team
-License: GPL-3+
-
-Files: m4/ax_boost_base.m4
-Copyright: 2008 Thomas Porschberg <thomas@randspringer.de>
-           2009 Peter Adolphs
-License: permissive-autoconf
-
-License: GPL-3+
- Dynare 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.
- .
- Dynare 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 Dynare.  If not, see <http://www.gnu.org/licenses/>.
-
-License: GPL-3+ with Autoconf exception
- 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/>.
- .
- As a special exception, the respective Autoconf Macro's copyright owner
- gives unlimited permission to copy, distribute and modify the configure
- scripts that are the output of Autoconf when processing the Macro. You
- need not follow the terms of the GNU General Public License when using
- or distributing such scripts, even though portions of the text of the
- Macro appear in them. The GNU General Public License (GPL) does govern
- all other use of the material that constitutes the Autoconf Macro.
- .
- This special exception to the GPL applies to versions of the Autoconf
- Macro released by the Autoconf Archive. When you make and distribute a
- modified version of the Autoconf Macro, you may extend this special
- exception to the GPL to apply to your modified version as well.
-
-License: LGPL-2.1+
- This library is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or (at
- your option) any later version.
- .
- This library 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 Lesser
- General Public License for more details.
- .
- You should have received a copy of the GNU Lesser General Public License
- along with this library. If not, see <http://www.gnu.org/licenses/>.
-
-License: LGPL-3+
- This program is free software: you can redistribute it and/or modify
- it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
- .
- You should have received a copy of the GNU Lesser General Public License
- along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-License: permissive-autoconf
- Copying and distribution of this file, with or without modification, are
- permitted in any medium without royalty provided the copyright notice
- and this notice are preserved. This file is offered as-is, without any
- warranty.

m4/ax_boost_base.m4

-# ===========================================================================
-#       http://www.gnu.org/software/autoconf-archive/ax_boost_base.html
-# ===========================================================================
-#
-# SYNOPSIS
-#
-#   AX_BOOST_BASE([MINIMUM-VERSION], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
-#
-# DESCRIPTION
-#
-#   Test for the Boost C++ libraries of a particular version (or newer)
-#
-#   If no path to the installed boost library is given the macro searchs
-#   under /usr, /usr/local, /opt and /opt/local and evaluates the
-#   $BOOST_ROOT environment variable. Further documentation is available at
-#   <http://randspringer.de/boost/index.html>.
-#
-#   This macro calls:
-#
-#     AC_SUBST(BOOST_CPPFLAGS) / AC_SUBST(BOOST_LDFLAGS)
-#
-#   And sets:
-#
-#     HAVE_BOOST
-#
-# LICENSE
-#
-#   Copyright (c) 2008 Thomas Porschberg <thomas@randspringer.de>
-#   Copyright (c) 2009 Peter Adolphs
-#
-#   Copying and distribution of this file, with or without modification, are
-#   permitted in any medium without royalty provided the copyright notice
-#   and this notice are preserved. This file is offered as-is, without any
-#   warranty.
-
-#serial 21
-
-AC_DEFUN([AX_BOOST_BASE],
-[
-AC_ARG_WITH([boost],
-  [AS_HELP_STRING([--with-boost@<:@=ARG@:>@],
-    [use Boost library from a standard location (ARG=yes),
-     from the specified location (ARG=<path>),
-     or disable it (ARG=no)
-     @<:@ARG=yes@:>@ ])],
-    [
-    if test "$withval" = "no"; then
-        want_boost="no"
-    elif test "$withval" = "yes"; then
-        want_boost="yes"
-        ac_boost_path=""
-    else
-        want_boost="yes"
-        ac_boost_path="$withval"
-    fi
-    ],
-    [want_boost="yes"])
-
-
-AC_ARG_WITH([boost-libdir],
-        AS_HELP_STRING([--with-boost-libdir=LIB_DIR],
-        [Force given directory for boost libraries. Note that this will override library path detection, so use this parameter only if default library detection fails and you know exactly where your boost libraries are located.]),
-        [
-        if test -d "$withval"
-        then
-                ac_boost_lib_path="$withval"
-        else
-                AC_MSG_ERROR(--with-boost-libdir expected directory name)
-        fi
-        ],
-        [ac_boost_lib_path=""]
-)
-
-if test "x$want_boost" = "xyes"; then
-    boost_lib_version_req=ifelse([$1], ,1.20.0,$1)
-    boost_lib_version_req_shorten=`expr $boost_lib_version_req : '\([[0-9]]*\.[[0-9]]*\)'`
-    boost_lib_version_req_major=`expr $boost_lib_version_req : '\([[0-9]]*\)'`
-    boost_lib_version_req_minor=`expr $boost_lib_version_req : '[[0-9]]*\.\([[0-9]]*\)'`
-    boost_lib_version_req_sub_minor=`expr $boost_lib_version_req : '[[0-9]]*\.[[0-9]]*\.\([[0-9]]*\)'`
-    if test "x$boost_lib_version_req_sub_minor" = "x" ; then
-        boost_lib_version_req_sub_minor="0"
-        fi
-    WANT_BOOST_VERSION=`expr $boost_lib_version_req_major \* 100000 \+  $boost_lib_version_req_minor \* 100 \+ $boost_lib_version_req_sub_minor`
-    AC_MSG_CHECKING(for boostlib >= $boost_lib_version_req)
-    succeeded=no
-
-    dnl On 64-bit systems check for system libraries in both lib64 and lib.
-    dnl The former is specified by FHS, but e.g. Debian does not adhere to
-    dnl this (as it rises problems for generic multi-arch support).
-    dnl The last entry in the list is chosen by default when no libraries
-    dnl are found, e.g. when only header-only libraries are installed!
-    libsubdirs="lib"
-    ax_arch=`uname -m`
-    case $ax_arch in
-      x86_64|ppc64|s390x|sparc64|aarch64)
-        libsubdirs="lib64 lib lib64"
-        ;;
-    esac
-
-    dnl first we check the system location for boost libraries
-    dnl this location ist chosen if boost libraries are installed with the --layout=system option
-    dnl or if you install boost with RPM
-    if test "$ac_boost_path" != ""; then
-        BOOST_CPPFLAGS="-I$ac_boost_path/include"
-        for ac_boost_path_tmp in $libsubdirs; do
-                if test -d "$ac_boost_path"/"$ac_boost_path_tmp" ; then
-                        BOOST_LDFLAGS="-L$ac_boost_path/$ac_boost_path_tmp"
-                        break
-                fi
-        done
-    elif test "$cross_compiling" != yes; then
-        for ac_boost_path_tmp in /usr /usr/local /opt /opt/local ; do
-            if test -d "$ac_boost_path_tmp/include/boost" && test -r "$ac_boost_path_tmp/include/boost"; then
-                for libsubdir in $libsubdirs ; do
-                    if ls "$ac_boost_path_tmp/$libsubdir/libboost_"* >/dev/null 2>&1 ; then break; fi
-                done
-                BOOST_LDFLAGS="-L$ac_boost_path_tmp/$libsubdir"
-                BOOST_CPPFLAGS="-I$ac_boost_path_tmp/include"
-                break;
-            fi
-        done
-    fi
-
-    dnl overwrite ld flags if we have required special directory with
-    dnl --with-boost-libdir parameter
-    if test "$ac_boost_lib_path" != ""; then
-       BOOST_LDFLAGS="-L$ac_boost_lib_path"
-    fi
-
-    CPPFLAGS_SAVED="$CPPFLAGS"
-    CPPFLAGS="$CPPFLAGS $BOOST_CPPFLAGS"
-    export CPPFLAGS
-
-    LDFLAGS_SAVED="$LDFLAGS"
-    LDFLAGS="$LDFLAGS $BOOST_LDFLAGS"
-    export LDFLAGS
-
-    AC_REQUIRE([AC_PROG_CXX])
-    AC_LANG_PUSH(C++)
-        AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
-    @%:@include <boost/version.hpp>
-    ]], [[
-    #if BOOST_VERSION >= $WANT_BOOST_VERSION
-    // Everything is okay
-    #else
-    #  error Boost version is too old
-    #endif
-    ]])],[
-        AC_MSG_RESULT(yes)
-    succeeded=yes
-    found_system=yes
-        ],[
-        ])
-    AC_LANG_POP([C++])
-
-
-
-    dnl if we found no boost with system layout we search for boost libraries
-    dnl built and installed without the --layout=system option or for a staged(not installed) version
-    if test "x$succeeded" != "xyes"; then
-        _version=0
-        if test "$ac_boost_path" != ""; then
-            if test -d "$ac_boost_path" && test -r "$ac_boost_path"; then
-                for i in `ls -d $ac_boost_path/include/boost-* 2>/dev/null`; do
-                    _version_tmp=`echo $i | sed "s#$ac_boost_path##" | sed 's/\/include\/boost-//' | sed 's/_/./'`
-                    V_CHECK=`expr $_version_tmp \> $_version`
-                    if test "$V_CHECK" = "1" ; then
-                        _version=$_version_tmp
-                    fi
-                    VERSION_UNDERSCORE=`echo $_version | sed 's/\./_/'`
-                    BOOST_CPPFLAGS="-I$ac_boost_path/include/boost-$VERSION_UNDERSCORE"
-                done
-            fi
-        else
-            if test "$cross_compiling" != yes; then
-                for ac_boost_path in /usr /usr/local /opt /opt/local ; do
-                    if test -d "$ac_boost_path" && test -r "$ac_boost_path"; then
-                        for i in `ls -d $ac_boost_path/include/boost-* 2>/dev/null`; do
-                            _version_tmp=`echo $i | sed "s#$ac_boost_path##" | sed 's/\/include\/boost-//' | sed 's/_/./'`
-                            V_CHECK=`expr $_version_tmp \> $_version`
-                            if test "$V_CHECK" = "1" ; then
-                                _version=$_version_tmp
-                                best_path=$ac_boost_path
-                            fi
-                        done
-                    fi
-                done
-
-                VERSION_UNDERSCORE=`echo $_version | sed 's/\./_/'`
-                BOOST_CPPFLAGS="-I$best_path/include/boost-$VERSION_UNDERSCORE"
-                if test "$ac_boost_lib_path" = ""; then
-                    for libsubdir in $libsubdirs ; do
-                        if ls "$best_path/$libsubdir/libboost_"* >/dev/null 2>&1 ; then break; fi
-                    done
-                    BOOST_LDFLAGS="-L$best_path/$libsubdir"
-                fi
-            fi
-
-            if test "x$BOOST_ROOT" != "x"; then
-                for libsubdir in $libsubdirs ; do
-                    if ls "$BOOST_ROOT/stage/$libsubdir/libboost_"* >/dev/null 2>&1 ; then break; fi
-                done
-                if test -d "$BOOST_ROOT" && test -r "$BOOST_ROOT" && test -d "$BOOST_ROOT/stage/$libsubdir" && test -r "$BOOST_ROOT/stage/$libsubdir"; then
-                    version_dir=`expr //$BOOST_ROOT : '.*/\(.*\)'`
-                    stage_version=`echo $version_dir | sed 's/boost_//' | sed 's/_/./g'`
-                        stage_version_shorten=`expr $stage_version : '\([[0-9]]*\.[[0-9]]*\)'`
-                    V_CHECK=`expr $stage_version_shorten \>\= $_version`
-                    if test "$V_CHECK" = "1" -a "$ac_boost_lib_path" = "" ; then
-                        AC_MSG_NOTICE(We will use a staged boost library from $BOOST_ROOT)
-                        BOOST_CPPFLAGS="-I$BOOST_ROOT"
-                        BOOST_LDFLAGS="-L$BOOST_ROOT/stage/$libsubdir"
-                    fi
-                fi
-            fi
-        fi
-
-        CPPFLAGS="$CPPFLAGS $BOOST_CPPFLAGS"
-        export CPPFLAGS
-        LDFLAGS="$LDFLAGS $BOOST_LDFLAGS"
-        export LDFLAGS
-
-        AC_LANG_PUSH(C++)
-            AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
-        @%:@include <boost/version.hpp>
-        ]], [[
-        #if BOOST_VERSION >= $WANT_BOOST_VERSION
-        // Everything is okay
-        #else
-        #  error Boost version is too old
-        #endif
-        ]])],[
-            AC_MSG_RESULT(yes)
-        succeeded=yes
-        found_system=yes
-            ],[
-            ])
-        AC_LANG_POP([C++])
-    fi
-
-    if test "$succeeded" != "yes" ; then
-        if test "$_version" = "0" ; then
-            AC_MSG_NOTICE([[We could not detect the boost libraries (version $boost_lib_version_req_shorten or higher). If you have a staged boost library (still not installed) please specify \$BOOST_ROOT in your environment and do not give a PATH to --with-boost option.  If you are sure you have boost installed, then check your version number looking in <boost/version.hpp>. See http://randspringer.de/boost for more documentation.]])
-        else
-            AC_MSG_NOTICE([Your boost libraries seems to old (version $_version).])
-        fi
-        # execute ACTION-IF-NOT-FOUND (if present):
-        ifelse([$3], , :, [$3])
-    else
-        AC_SUBST(BOOST_CPPFLAGS)
-        AC_SUBST(BOOST_LDFLAGS)
-        AC_DEFINE(HAVE_BOOST,,[define if the Boost library is available])
-        # execute ACTION-IF-FOUND (if present):
-        ifelse([$2], , :, [$2])
-    fi
-
-    CPPFLAGS="$CPPFLAGS_SAVED"
-    LDFLAGS="$LDFLAGS_SAVED"
-fi
-
-])

meson.build

+# Meson file for building the preprocessor in a standalone fashion.
+# It is not used when building Dynare as a whole.
+
+project('dynare-preprocessor', 'cpp',
+        version : '7-unstable',
+        # NB: update C++ standard in .clang-format whenever the following is modified
+        default_options : [ 'cpp_std=gnu++20', 'warning_level=2' ],
+        meson_version : '>=0.64.0')
+
+add_global_arguments('-DPACKAGE_VERSION="' + meson.project_version() + '"', language : 'cpp')
+
+if get_option('warning_level').to_int() >= 2
+  add_global_arguments('-Wold-style-cast', language : 'cpp')
+endif
+
+cpp_compiler = meson.get_compiler('cpp')
+
+subdir('src')
+subdir('doc')

scripts/homebrew-native-arm64.ini

+# Meson native file for compiling under Homebrew / arm64
+
+[binaries]
+cpp = '/opt/homebrew/bin/g++-14'
+flex = '/opt/homebrew/opt/flex/bin/flex'
+bison = '/opt/homebrew/opt/bison/bin/bison'
+
+[built-in options]
+# XCode 15 (on Ventura and Sonoma) has a linker issue, see https://github.com/mesonbuild/meson/issues/12282, workaround is to use ld_classic
+cpp_link_args = [ '-Wl,-ld_classic' ]
\ No newline at end of file