Add support for building libsigc++-3.0 with Meson

libsigc++-3.0 can be built with either Autotools or Meson.

14 files changed, 1040 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
index 5237bf4..8847c6c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -24,3 +24,5 @@ Makefile.in
 /sigc++config.h
 /sigc++-*.pc
 /stamp-h?
+untracked/build_scripts/
+untracked/docs/
diff --git a/MSVC_NMake/meson.build b/MSVC_NMake/meson.build
new file mode 100644
index 0000000..89db786
--- /dev/null
+++ b/MSVC_NMake/meson.build
@@ -0,0 +1,17 @@
+# MSVC_NMake
+
+# Input: pkg_conf_data, project_build_root, python3
+# Output: -
+
+configure_file(
+  input: 'sigc.rc.in',
+  output: '@BASENAME@',
+  configuration: pkg_conf_data,
+)
+
+# Copy the generated configuration header into the MSVC project directory.
+cmd_py = '''
+import shutil
+shutil.copy2("@0@", "@1@")
+'''.format(project_build_root / 'sigc++config.h', meson.current_build_dir())
+meson.add_postconf_script(python3.path(), '-c', cmd_py)
diff --git a/Makefile.am b/Makefile.am
index a431b2b..76d0482 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -44,6 +44,21 @@ dist_noinst_DATA = \
 
 DISTCLEANFILES = MSVC_NMake/sigc++config.h
 
+# Distribute files needed when building libsigc++ with meson.
+EXTRA_DIST = \
+  meson.build \
+  meson_options.txt \
+  sigc++config.h.meson \
+  MSVC_NMake/meson.build \
+  docs/docs/manual/meson.build \
+  docs/docs/reference/meson.build \
+  examples/meson.build \
+  sigc++/meson.build \
+  tests/meson.build \
+  tools/dist-cmd.py \
+  tools/tutorial-custom-cmd.py \
+  untracked/README
+
 # Optional: auto-generate the ChangeLog file from the git log on make dist
 include $(top_srcdir)/build/dist-changelog.am
 
diff --git a/docs/docs/manual/meson.build b/docs/docs/manual/meson.build
new file mode 100644
index 0000000..c17bf3e
--- /dev/null
+++ b/docs/docs/manual/meson.build
@@ -0,0 +1,91 @@
+# docs/docs/manual
+
+# input: install_datadir, sigcxx_pcname, tutorial_custom_cmd, python3,
+#        build_documentation, dist_cmd, book_name
+# output: can_parse_and_validate, build_pdf_by_default, can_build_pdf,
+#         install_tutorialdir
+
+# xsltproc is required by tutorial_custom_cmd html.
+xsltproc = find_program('xsltproc', required: build_documentation)
+xmllint = find_program('xmllint', required: false)
+
+can_parse_and_validate = xmllint.found()
+
+validate = get_option('validation') ? 'true' : 'false'
+
+dblatex = find_program('dblatex', required: false)
+can_build_pdf = dblatex.found() or (xmllint.found() and \
+                find_program('docbook2pdf', required: false).found())
+build_pdf_by_default = get_option('build-pdf')
+
+# Installation directories are relative to {prefix}.
+install_tutorialdir = install_datadir / 'doc' / book_name / 'tutorial'
+
+if not build_documentation
+  # Documentation shall not be built or installed.
+  # Return to the calling meson.build file.
+  subdir_done()
+endif
+
+doc_dist_dir = 'untracked' / 'docs' / 'docs' / 'manual' # Relative to MESON_DIST_ROOT
+
+sigc_manual_xml = 'libsigc_manual.xml'
+sigc_manual_pdf = 'libsigc_manual.pdf'
+
+# Create an html version of the DocBook.
+custom_target('manual_html',
+  input: sigc_manual_xml,
+  output: 'html',
+  command: [
+    python3, tutorial_custom_cmd, 'html',
+    '@INPUT@',
+    '@OUTPUT@',
+  ],
+  build_by_default: true,
+  install: true,
+  install_dir: install_tutorialdir
+)
+
+if can_parse_and_validate
+  # Parse and possibly validate the DocBook.
+  custom_target('manual_xmllint',
+    input: sigc_manual_xml,
+    output: 'manual_xmllint.stamp',
+    command: [
+      python3, tutorial_custom_cmd, 'xmllint',
+      validate,
+      '@INPUT@',
+      '@OUTPUT@'
+    ],
+    build_by_default: true,
+  )
+endif
+
+if can_build_pdf
+  # Create a PDF file of the DocBook.
+  # Prefer dblatex, if both dblatex and docbook2pdf are available.
+  custom_target('manual_pdf',
+    input: sigc_manual_xml,
+    output: sigc_manual_pdf,
+    command: [
+      python3, tutorial_custom_cmd,
+      dblatex.found() ? 'dblatex' : 'docbook2pdf',
+      '@INPUT@',
+      '@OUTPUT@'
+    ],
+    build_by_default: build_pdf_by_default,
+  )
+endif
+
+if not meson.is_subproject()
+  # Distribute built files.
+  # (add_dist_script() is not allowed in a subproject)
+  meson.add_dist_script(
+    python3.path(), dist_cmd,
+    python3.path(), tutorial_custom_cmd, 'dist_doc',
+    doc_dist_dir,
+    meson.current_build_dir(),
+    meson.current_source_dir() / sigc_manual_xml,
+    meson.current_build_dir() / sigc_manual_pdf,
+  )
+endif
diff --git a/docs/docs/reference/meson.build b/docs/docs/reference/meson.build
new file mode 100644
index 0000000..9977ace
--- /dev/null
+++ b/docs/docs/reference/meson.build
@@ -0,0 +1,126 @@
+# docs/docs/reference
+
+# Input: project_build_root, project_source_root, sigcxx_pcname,
+#        sigcxx_api_version, perl, build_documentation, source_h_files,
+#        hg_ccg_basenames, install_datadir, dist_cmd, python3
+# Output: install_docdir, install_devhelpdir, book_name
+
+# There are no built source files in libsigc++-3.0.
+
+tag_file_modules = [
+  'mm-common-libstdc++',
+]
+doxygen_tagfiles = ''
+docinstall_flags = []
+foreach module : tag_file_modules
+  depmod = dependency(module, required: false)
+  if depmod.found()
+    doxytagfile = depmod.get_pkgconfig_variable('doxytagfile')
+    htmlrefpub = depmod.get_pkgconfig_variable('htmlrefpub', default: '')
+    htmlrefdir = depmod.get_pkgconfig_variable('htmlrefdir', default: '')
+    if htmlrefpub == ''
+      htmlrefpub = htmlrefdir
+    elif htmlrefdir == ''
+      htmlrefdir = htmlrefpub
+    endif
+    doxygen_tagfiles += ' "' + doxytagfile + '=' + htmlrefpub + '"'
+    if not htmlrefdir.endswith('/')
+      htmlrefdir += '/'
+    endif
+    docinstall_flags += ['-l', doxytagfile.split('/')[-1] + '@' + htmlrefdir]
+  endif
+endforeach
+
+book_name = 'lib' + sigcxx_pcname
+book_title = meson.project_name() + ' Reference Manual'
+
+# Configuration data for Doxyfile.
+doc_conf_data = configuration_data()
+doc_conf_data.set('configure_input',
+  'docs/docs/reference/Doxyfile. Generated from Doxyfile.in by meson.configure_file().')
+doc_conf_data.set('PACKAGE_NAME', meson.project_name())
+doc_conf_data.set('PACKAGE_VERSION', meson.project_version())
+doc_conf_data.set('abs_top_builddir', project_build_root)
+doc_conf_data.set('abs_top_srcdir', project_source_root)
+doc_conf_data.set('SIGCXX_API_VERSION', sigcxx_api_version)
+doc_conf_data.set('DOXYGEN_TAGFILES', doxygen_tagfiles)
+doc_conf_data.set('PERL', perl.path())
+
+configure_file(
+  input: 'Doxyfile.in',
+  output: '@BASENAME@',
+  configuration: doc_conf_data,
+)
+
+# Installation directories relative to {prefix}.
+install_docdir = install_datadir / 'doc' / book_name
+install_reference_docdir = install_docdir / 'reference'
+install_devhelpdir = install_datadir / 'devhelp' / 'books' / book_name
+
+if not build_documentation
+  # Documentation shall not be built or installed.
+  # Return to the calling meson.build file.
+  subdir_done()
+endif
+
+# Input .h files to Doxygen.
+src_h_files = []
+foreach file : source_h_files
+  src_h_files += project_source_root / 'sigc++' / file
+endforeach
+src_h_files += project_source_root / 'sigc++' / 'sigc++.h'
+
+doctool_dir = project_source_root / 'untracked' / 'docs' / 'docs' # MMDOCTOOLDIR
+doctool_dist_dir = 'untracked' / 'docs' / 'docs' # Relative to MESON_DIST_ROOT
+
+tag_file = custom_target('html_and_tag',
+  input: src_h_files,
+  output: book_name + '.tag',
+  command: [
+    python3, doc_reference, 'doxygen',
+    doctool_dir,
+    '@OUTPUT@',
+    '@INPUT@',
+  ],
+  build_by_default: build_documentation,
+  install: true,
+  install_dir: install_reference_docdir,
+)
+
+devhelp_file = custom_target('devhelp',
+  input: tag_file,
+  output: book_name + '.devhelp2',
+  command: [
+    python3, doc_reference, 'devhelp',
+    doctool_dir,
+    '@INPUT@',
+    '@OUTPUT@',
+    book_name,
+    book_title,
+  ],
+  build_by_default: build_documentation,
+)
+
+# Install Devhelp file and html files.
+meson.add_install_script(
+  python3.path(), doc_reference, 'install_doc',
+  doctool_dir,
+  devhelp_file.full_path(),
+  install_devhelpdir,
+  install_reference_docdir / 'html',
+  docinstall_flags
+)
+
+if not meson.is_subproject()
+  # Distribute built files and files copied by mm-common-get.
+  # (add_dist_script() is not allowed in a subproject)
+  meson.add_dist_script(
+    python3.path(), dist_cmd,
+    python3.path(), doc_reference, 'dist_doc',
+    doctool_dir,
+    doctool_dist_dir,
+    meson.current_build_dir(),
+    tag_file.full_path(),
+    devhelp_file.full_path(),
+  )
+endif
diff --git a/examples/meson.build b/examples/meson.build
new file mode 100644
index 0000000..a3c6de2
--- /dev/null
+++ b/examples/meson.build
@@ -0,0 +1,27 @@
+# examples
+
+# input: sigcxx_dep, build_examples
+
+examples = [
+# [[dir-name], exe-name, [sources]]
+  [[], 'hello_world', ['hello_world.cc']],
+  [[], 'member_method', ['member_method.cc']],
+]
+
+foreach ex : examples
+  dir = ''
+  foreach dir_part : ex[0]
+    dir = dir / dir_part
+  endforeach
+  ex_name = (dir / ex[1]).underscorify()
+  ex_sources = []
+  foreach src : ex[2]
+    ex_sources += dir / src
+  endforeach
+
+  exe_file = executable(ex_name, ex_sources,
+    dependencies: sigcxx_dep,
+    gui_app: false,
+    build_by_default: build_examples
+  )
+endforeach
diff --git a/meson.build b/meson.build
new file mode 100644
index 0000000..a6f455c
--- /dev/null
+++ b/meson.build
@@ -0,0 +1,272 @@
+# This file is part of libsigc++.
+
+project('sigc++', 'cpp',
+  version: '3.0.0',
+  license: 'LGPLv2.1+',
+  default_options: [
+    'cpp_std=c++17',
+    'warning_level=0',
+  ],
+  meson_version: '>= 0.50.0', # required for python3.path()
+)
+
+sigcxx_api_version = '3.0'
+sigcxx_pcname = meson.project_name() + '-' + sigcxx_api_version
+
+sigcxx_version_array = meson.project_version().split('.')
+sigcxx_major_version = sigcxx_version_array[0].to_int()
+sigcxx_minor_version = sigcxx_version_array[1].to_int()
+sigcxx_micro_version = sigcxx_version_array[2].to_int()
+
+# http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
+# The relation between libtool's current:revison:age interface versioning
+# and the .so filename, .so.x.y.z, is
+# x = current - age
+# y = age
+# z = revision
+# If libtool_soversion is updated as described in libtool's documentation,
+# x.y.z will usually *not* be equal to meson.project_version().
+libtool_soversion = [0, 0, 0]
+sigcxx_libversion = '@0@.@1@.@2@'.format(
+  libtool_soversion[0] - libtool_soversion[2],
+  libtool_soversion[2],
+  libtool_soversion[1])
+
+# Use these instead of meson.source_root() and meson.build_root() in subdirectories.
+# source_root() and build_root() are not useful, if this is a subproject.
+project_source_root = meson.current_source_dir()
+project_build_root = meson.current_build_dir()
+
+cpp_compiler = meson.get_compiler('cpp')
+is_msvc = cpp_compiler.get_id() == 'msvc'
+python3 = import('python').find_installation('python3')
+
+python_version = python3.language_version()
+python_version_req = '>= 3.5'
+if not python_version.version_compare(python_version_req)
+  error('Requires Python @0@, found @1@.'.format(python_version_req, python_version))
+endif
+
+# Do we build from a git repository?
+# Suppose we do if and only if a .git directory exists.
+cmd_py = '''
+import os
+import sys
+sys.exit(0 if os.path.isdir("@0@") else 1)
+'''.format(project_source_root / '.git')
+is_git_build = run_command(python3, '-c', cmd_py).returncode() == 0
+# In Unix-like system, an alternative is
+# is_git_build = run_command('test', '-d', project_source_root / '.git').returncode() == 0
+# Python code can be used in all operating sytems where Meson can run.
+
+# Options.
+maintainer_mode_opt = get_option('maintainer-mode')
+maintainer_mode = maintainer_mode_opt == 'true' or \
+                 (maintainer_mode_opt == 'if-git-build' and is_git_build)
+warning_level = get_option('warnings')
+build_deprecated_api = get_option('build-deprecated-api')
+build_documentation_opt = get_option('build-documentation')
+build_documentation = build_documentation_opt == 'true' or \
+                     (build_documentation_opt == 'if-maintainer-mode' and maintainer_mode)
+build_examples = get_option('build-examples')
+do_benchmark = get_option('benchmark')
+
+# Installation directories are relative to {prefix}.
+install_prefix = get_option('prefix')
+install_includedir = get_option('includedir')
+install_libdir = get_option('libdir')
+install_datadir = get_option('datadir')
+install_pkgconfigdir = install_libdir / 'pkgconfig'
+
+# Dependencies.
+# sigcxx_build_dep: Dependencies when building the libsigc++ library.
+# sigcxx_dep (created in sigc++/meson.build):
+#   Dependencies when using the libsigc++ library.
+sigcxx_build_dep = [] # No dependencies
+
+benchmark_dep = dependency('boost', modules: ['system', 'timer'],
+                           version: '>=1.20.0', required: do_benchmark)
+can_benchmark = benchmark_dep.found()
+
+if is_msvc
+  # We must have Visual Studio 2017 15.7 or later...
+  assert(cpp_compiler.version().split('.')[0].to_int() >= 19 and \
+         cpp_compiler.version().split('.')[1].to_int() >= 15,
+         'Visual Studio 2017 15.7 or later is required')
+endif
+
+# Some dependencies are required only in maintainer mode and/or
+# if documentation shall be built.
+mm_common_get = find_program('mm-common-get', required: maintainer_mode)
+perl = find_program('perl', required: build_documentation)
+doxygen = find_program('doxygen', required: build_documentation)
+dot = find_program('dot', required: build_documentation) # Used by Doxygen
+xsltproc = find_program('xsltproc', required: build_documentation)
+
+script_dir = project_source_root / 'untracked' / 'build_scripts'
+doc_reference = script_dir / 'doc-reference.py'
+dist_changelog = script_dir / 'dist-changelog.py'
+dist_build_scripts = script_dir / 'dist-build-scripts.py'
+dist_cmd = project_source_root / 'tools' / 'dist-cmd.py' # Must be committed to git.
+tutorial_custom_cmd = project_source_root / 'tools' / 'tutorial-custom-cmd.py'
+
+if maintainer_mode and mm_common_get.found()
+  # Copy files to untracked/build_scripts and untracked/docs/docs.
+  run_command(mm_common_get, '--force', script_dir,
+    project_source_root / 'untracked' / 'docs' / 'docs')
+endif
+
+# Set compiler warnings.
+warning_flags = []
+if warning_level == 'min'
+  if is_msvc
+    warning_flags = ['/W3']
+  else
+    warning_flags = ['-Wall']
+  endif
+elif warning_level == 'max' or warning_level == 'fatal'
+  if is_msvc
+    warning_flags = ['/W4']
+  else
+    warning_flags = '-pedantic -Wall -Wextra -Wsuggest-override -Wshadow -Wzero-as-null-pointer-constant -Wformat-security'.split()
+  endif
+  if warning_level == 'fatal'
+    if is_msvc
+      warning_flags += ['/WX']
+    else
+      warning_flags += ['-Werror']
+    endif
+  endif
+endif
+
+warning_flags = cpp_compiler.get_supported_arguments(warning_flags)
+add_project_arguments(warning_flags, language: 'cpp')
+
+# MSVC: Ignore warnings that aren't really harmful, but make those
+#       that should not be overlooked stand out.
+if is_msvc
+  foreach wd : ['/FImsvc_recommended_pragmas.h', '/wd4267', '/wd4530']
+    disabled_warning = cpp_compiler.get_supported_arguments(wd)
+    add_project_arguments(disabled_warning, language: 'cpp')
+  endforeach
+endif
+
+# Configure files
+pkg_conf_data = configuration_data()
+pkg_conf_data.set('prefix', install_prefix)
+pkg_conf_data.set('exec_prefix', '${prefix}')
+pkg_conf_data.set('libdir', '${exec_prefix}' / install_libdir)
+pkg_conf_data.set('datarootdir', '${prefix}' / install_datadir)
+pkg_conf_data.set('datadir', '${datarootdir}')
+pkg_conf_data.set('includedir', '${prefix}' / install_includedir)
+pkg_conf_data.set('top_srcdir', project_source_root)
+pkg_conf_data.set('PACKAGE_VERSION', meson.project_version())
+pkg_conf_data.set('SIGCXX_API_VERSION', sigcxx_api_version)
+
+if not build_deprecated_api
+  pkg_conf_data.set('SIGCXX_DISABLE_DEPRECATED', true)
+endif
+pkg_conf_data.set('SIGCXX_MAJOR_VERSION', sigcxx_major_version)
+pkg_conf_data.set('SIGCXX_MINOR_VERSION', sigcxx_minor_version)
+pkg_conf_data.set('SIGCXX_MICRO_VERSION', sigcxx_micro_version)
+
+configure_file(
+  input: 'sigc++.pc.in',
+  output: sigcxx_pcname + '.pc',
+  configuration: pkg_conf_data,
+  install_dir: install_pkgconfigdir,
+)
+
+configure_file(
+  input: 'sigc++-uninstalled.pc.in',
+  output: sigcxx_pcname + '-uninstalled.pc',
+  configuration: pkg_conf_data,
+)
+
+install_includeconfigdir = install_libdir / sigcxx_pcname / 'include'
+configure_file(
+  input: 'sigc++config.h.meson',
+  output: 'sigc++config.h',
+  configuration: pkg_conf_data,
+  install_dir: install_includeconfigdir,
+)
+
+#subdir('cmake')
+subdir('MSVC_NMake')
+subdir('sigc++')
+subdir('examples')
+subdir('tests')
+subdir('docs/docs/reference')
+subdir('docs/docs/manual')
+
+if not meson.is_subproject()
+  # Add a ChangeLog file to the distribution directory.
+  # (add_dist_script() is not allowed in a subproject)
+  meson.add_dist_script(
+    python3.path(), dist_cmd,
+    python3.path(), dist_changelog,
+    project_source_root,
+  )
+  # Add build scripts to the distribution directory, and delete .gitignore
+  # files and an empty $MESON_DIST_ROOT/build/ directory.
+  meson.add_dist_script(
+    python3.path(), dist_cmd,
+    python3.path(), dist_build_scripts,
+    project_source_root,
+    'untracked' / 'build_scripts',
+  )
+endif
+
+# Print a summary.
+real_maintainer_mode = ''
+if maintainer_mode_opt == 'if-git-build'
+  real_maintainer_mode = ' (@0@)'.format(maintainer_mode)
+endif
+
+real_build_documentation = ''
+if build_documentation_opt == 'if-maintainer-mode'
+  real_build_documentation = ' (@0@)'.format(build_documentation)
+endif
+
+validate = get_option('validation') and can_parse_and_validate
+explain_val = ''
+if get_option('validation') and not validate
+  explain_val = ' (requires xmllint)'
+endif
+
+build_pdf = build_pdf_by_default and can_build_pdf
+explain_pdf = ''
+if build_pdf_by_default and not build_pdf
+  explain_pdf = ' (requires dblatex or (xmllint and docbook2pdf))'
+endif
+
+
+
+summary = [
+  '',
+  '------',
+  meson.project_name() + ' ' + meson.project_version(),
+  '',
+  '         Maintainer mode: @0@@1@'.format(maintainer_mode_opt, real_maintainer_mode),
+  '       Compiler warnings: @0@'.format(warning_level),
+  '    Build deprecated API: @0@'.format(build_deprecated_api),
+  'Build HTML documentation: @0@@1@'.format(build_documentation_opt, real_build_documentation),
+  '          XML validation: @0@@1@'.format(validate, explain_val),
+  '               Build PDF: @0@@1@'.format(build_pdf, explain_pdf),
+  '  Build example programs: @0@'.format(build_examples),
+  '               Benchmark: @0@'.format(do_benchmark),
+  'Directories:',
+  '                  prefix: @0@'.format(install_prefix),
+  '              includedir: @0@'.format(install_prefix / install_includedir),
+  '        includesigcxxdir: @0@'.format(install_prefix / install_includedir / sigcxx_pcname),
+  '                  libdir: @0@'.format(install_prefix / install_libdir),
+  '        includeconfigdir: @0@'.format(install_prefix / install_includeconfigdir),
+  '            pkgconfigdir: @0@'.format(install_prefix / install_pkgconfigdir),
+  '                 datadir: @0@'.format(install_prefix / install_datadir),
+  '                  docdir: @0@'.format(install_prefix / install_docdir),
+  '              devhelpdir: @0@'.format(install_prefix / install_devhelpdir),
+  '             tutorialdir: @0@'.format(install_prefix / install_tutorialdir),
+  '------'
+]
+
+message('\n'.join(summary))
diff --git a/meson_options.txt b/meson_options.txt
new file mode 100644
index 0000000..b1ffd54
--- /dev/null
+++ b/meson_options.txt
@@ -0,0 +1,16 @@
+option('maintainer-mode', type: 'combo', choices: ['false', 'if-git-build', 'true'],
+  value: 'if-git-build', description: 'Generate source code from .hg and .ccg files')
+option('warnings', type: 'combo', choices: ['no', 'min', 'max', 'fatal'],
+  value: 'fatal', description: 'Compiler warning level')
+option('build-deprecated-api', type: 'boolean', value: true,
+  description: 'Build deprecated API and include it in the library')
+option('build-documentation', type: 'combo', choices: ['false', 'if-maintainer-mode', 'true'],
+  value: 'if-maintainer-mode', description: 'Build and install the documentation')
+option('validation', type: 'boolean', value: true,
+  description: 'Validate the tutorial XML file')
+option('build-pdf', type: 'boolean', value: false,
+  description: 'Build tutorial PDF file')
+option('build-examples', type: 'boolean', value: true,
+  description: 'Build example programs')
+option('benchmark', type: 'boolean', value: false,
+  description: 'Build and test benchmark program')
diff --git a/sigc++/meson.build b/sigc++/meson.build
new file mode 100644
index 0000000..8e92186
--- /dev/null
+++ b/sigc++/meson.build
@@ -0,0 +1,86 @@
+# sigc++
+
+# Input: sigcxx_build_dep, sigcxx_pcname, sigcxx_libversion, install_includedir
+# Output: source_h_files, sigcxx_dep
+
+# There are no built source files in libsigc++-3.0.
+
+source_cc_files = [
+  'connection.cc',
+  'signal_base.cc',
+  'trackable.cc',
+  'functors' / 'slot_base.cc',
+]
+
+sigc_h_files = [
+  'bind.h',
+  'bind_return.h',
+  'connection.h',
+  'limit_reference.h',
+  'member_method_trait.h',
+  'reference_wrapper.h',
+  'retype_return.h',
+  'signal.h',
+  'signal_base.h',
+  'slot.h',
+  'trackable.h',
+  'type_traits.h',
+  'visit_each.h',
+  'weak_raw_ptr.h',
+]
+adaptors_h_files = [
+  'adaptors' / 'adaptor_base.h',
+  'adaptors' / 'adaptors.h',
+  'adaptors' / 'adaptor_trait.h',
+  'adaptors' / 'adapts.h',
+  'adaptors' / 'bind.h',
+  'adaptors' / 'bind_return.h',
+  'adaptors' / 'bound_argument.h',
+  'adaptors' / 'compose.h',
+  'adaptors' / 'exception_catch.h',
+  'adaptors' / 'hide.h',
+  'adaptors' / 'retype.h',
+  'adaptors' / 'retype_return.h',
+  'adaptors' / 'track_obj.h',
+  'adaptors' / 'tuple_visitor_visit_each.h',
+]
+functors_h_files = [
+  'functors' / 'functor_trait.h',
+  'functors' / 'functors.h',
+  'functors' / 'mem_fun.h',
+  'functors' / 'ptr_fun.h',
+  'functors' / 'slot.h',
+  'functors' / 'slot_base.h',
+]
+tuple_utils_h_files = [
+  'tuple-utils' / 'tuple_cdr.h',
+  'tuple-utils' / 'tuple_end.h',
+  'tuple-utils' / 'tuple_for_each.h',
+  'tuple-utils' / 'tuple_start.h',
+  'tuple-utils' / 'tuple_transform_each.h',
+]
+
+source_h_files = sigc_h_files + adaptors_h_files + functors_h_files + tuple_utils_h_files
+
+install_headers('sigc++.h', subdir: sigcxx_pcname / 'sigc++')
+install_headers(sigc_h_files, subdir: sigcxx_pcname / 'sigc++')
+install_headers(adaptors_h_files, subdir: sigcxx_pcname / 'sigc++' / 'adaptors')
+install_headers(functors_h_files, subdir: sigcxx_pcname / 'sigc++' / 'functors')
+install_headers(tuple_utils_h_files, subdir: sigcxx_pcname / 'sigc++' / 'tuple-utils')
+
+extra_include_dirs = ['..']
+sigcxx_library = library(sigcxx_pcname,
+  source_cc_files,
+  version: sigcxx_libversion,
+  include_directories: extra_include_dirs,
+  dependencies: sigcxx_build_dep,
+  install: true,
+)
+
+# This is useful in the main project when libsigc++ is used as a subproject.
+# It's also used when building example programs and test programs.
+sigcxx_dep = declare_dependency(
+  link_with: sigcxx_library,
+  include_directories: extra_include_dirs,
+  dependencies: sigcxx_build_dep
+)
diff --git a/sigc++config.h.meson b/sigc++config.h.meson
new file mode 100644
index 0000000..913660d
--- /dev/null
+++ b/sigc++config.h.meson
@@ -0,0 +1,71 @@
+/* This file is part of libsigc++. */
+#ifndef SIGCXXCONFIG_H_INCLUDED
+#define SIGCXXCONFIG_H_INCLUDED
+
+/* Define to omit deprecated API from the library. */
+#mesondefine SIGCXX_DISABLE_DEPRECATED
+
+/* Major version number of sigc++. */
+#mesondefine SIGCXX_MAJOR_VERSION
+
+/* Minor version number of sigc++. */
+#mesondefine SIGCXX_MINOR_VERSION
+
+/* Micro version number of sigc++. */
+#mesondefine SIGCXX_MICRO_VERSION
+
+/* Detect Win32 platform */
+#ifdef _WIN32
+# if defined(_MSC_VER)
+#  define SIGC_MSC 1
+#  define SIGC_WIN32 1
+#  define SIGC_DLL 1
+# elif defined(__CYGWIN__)
+#  define SIGC_CONFIGURE 1
+# elif defined(__MINGW32__)
+#  define SIGC_WIN32 1
+#  define SIGC_CONFIGURE 1
+# else
+#  error "libsigc++ config: Unknown win32 architecture (send me gcc --dumpspecs or equiv)"
+# endif
+#else /* !_WIN32 */
+# define SIGC_CONFIGURE 1
+#endif /* !_WIN32 */
+
+#ifdef SIGC_MSC
+/*
+ * MS VC7 Warning 4251 says that the classes to any member objects in an
+ * exported class must also be exported.  Some of the libsigc++
+ * template classes contain std::list members.  MS KB article 168958 says
+ * that it's not possible to export a std::list instantiation due to some
+ * wacky class nesting issues, so our only options are to ignore the
+ * warning or to modify libsigc++ to remove the std::list dependency.
+ * AFAICT, the std::list members are used internally by the library code
+ * and don't need to be used from the outside, and ignoring the warning
+ * seems to have no adverse effects, so that seems like a good enough
+ * solution for now.
+ */
+# pragma warning(disable:4251)
+
+#if (_MSC_VER < 1900) && !defined (noexcept)
+#define _ALLOW_KEYWORD_MACROS 1
+#define noexcept _NOEXCEPT
+#endif
+
+#else /* SIGC_MSC */
+
+#endif /* !SIGC_MSC */
+
+#ifdef SIGC_DLL
+# if defined(SIGC_BUILD) && defined(_WINDLL)
+#  define SIGC_API __declspec(dllexport)
+# elif !defined(SIGC_BUILD)
+#  define SIGC_API __declspec(dllimport)
+# else
+#  define SIGC_API
+# endif
+#else /* !SIGC_DLL */
+# define SIGC_API
+#endif /* !SIGC_DLL */
+
+#endif /* !SIGCXXCONFIG_H_INCLUDED */
diff --git a/tests/meson.build b/tests/meson.build
new file mode 100644
index 0000000..04aaa99
--- /dev/null
+++ b/tests/meson.build
@@ -0,0 +1,99 @@
+# tests
+
+# input: sigcxx_dep, do_benchmark, can_benchmark, benchmark_dep
+
+benchmark_timeout = 100
+
+test_programs = [
+# [[dir-name], exe-name, [sources]]
+  [[], 'test_accum_iter', ['test_accum_iter.cc', 'testutilities.cc']],
+  [[], 'test_accumulated', ['test_accumulated.cc', 'testutilities.cc']],
+  [[], 'test_bind', ['test_bind.cc', 'testutilities.cc']],
+  [[], 'test_bind_as_slot', ['test_bind_as_slot.cc', 'testutilities.cc']],
+  [[], 'test_bind_ref', ['test_bind_ref.cc', 'testutilities.cc']],
+  [[], 'test_bind_refptr', ['test_bind_refptr.cc', 'testutilities.cc']],
+  [[], 'test_bind_return', ['test_bind_return.cc', 'testutilities.cc']],
+  [[], 'test_compose', ['test_compose.cc', 'testutilities.cc']],
+  [[], 'test_connection', ['test_connection.cc', 'testutilities.cc']],
+  [[], 'test_copy_invalid_slot', ['test_copy_invalid_slot.cc', 'testutilities.cc']],
+  [[], 'test_cpp11_lambda', ['test_cpp11_lambda.cc', 'testutilities.cc']],
+  [[], 'test_custom', ['test_custom.cc', 'testutilities.cc']],
+  [[], 'test_disconnect', ['test_disconnect.cc', 'testutilities.cc']],
+  [[], 'test_disconnect_during_emit', ['test_disconnect_during_emit.cc', 'testutilities.cc']],
+  [[], 'test_exception_catch', ['test_exception_catch.cc', 'testutilities.cc']],
+  [[], 'test_hide', ['test_hide.cc', 'testutilities.cc']],
+  [[], 'test_limit_reference', ['test_limit_reference.cc', 'testutilities.cc']],
+  [[], 'test_member_method_trait', ['test_member_method_trait.cc', 'testutilities.cc']],
+  [[], 'test_mem_fun', ['test_mem_fun.cc', 'testutilities.cc']],
+  [[], 'test_ptr_fun', ['test_ptr_fun.cc', 'testutilities.cc']],
+  [[], 'test_retype', ['test_retype.cc', 'testutilities.cc']],
+  [[], 'test_retype_return', ['test_retype_return.cc', 'testutilities.cc']],
+  [[], 'test_signal', ['test_signal.cc', 'testutilities.cc']],
+  [[], 'test_signal_move', ['test_signal_move.cc', 'testutilities.cc']],
+  [[], 'test_size', ['test_size.cc', 'testutilities.cc']],
+  [[], 'test_slot', ['test_slot.cc', 'testutilities.cc']],
+  [[], 'test_slot_disconnect', ['test_slot_disconnect.cc', 'testutilities.cc']],
+  [[], 'test_slot_move', ['test_slot_move.cc', 'testutilities.cc']],
+  [[], 'test_trackable', ['test_trackable.cc', 'testutilities.cc']],
+  [[], 'test_trackable_move', ['test_trackable_move.cc', 'testutilities.cc']],
+  [[], 'test_track_obj', ['test_track_obj.cc', 'testutilities.cc']],
+  [[], 'test_tuple_cdr', ['test_tuple_cdr.cc', 'testutilities.cc']],
+  [[], 'test_tuple_end', ['test_tuple_end.cc', 'testutilities.cc']],
+  [[], 'test_tuple_for_each', ['test_tuple_for_each.cc', 'testutilities.cc']],
+  [[], 'test_tuple_start', ['test_tuple_start.cc', 'testutilities.cc']],
+  [[], 'test_tuple_transform_each', ['test_tuple_transform_each.cc', 'testutilities.cc']],
+  [[], 'test_visit_each', ['test_visit_each.cc', 'testutilities.cc']],
+  [[], 'test_visit_each_trackable', ['test_visit_each_trackable.cc', 'testutilities.cc']],
+  [[], 'test_weak_raw_ptr', ['test_weak_raw_ptr.cc', 'testutilities.cc']],
+]
+
+benchmark_programs = [
+# [[dir-name], exe-name, [sources]]
+  [[], 'benchmark1', ['benchmark.cc']],
+]
+
+foreach ex : test_programs
+  dir = ''
+  foreach dir_part : ex[0]
+    dir = dir / dir_part
+  endforeach
+  ex_name = (dir / ex[1]).underscorify()
+  ex_sources = []
+  foreach src : ex[2]
+    ex_sources += dir / src
+  endforeach
+
+  exe_file = executable(ex_name, ex_sources,
+    dependencies: sigcxx_dep,
+    gui_app: false,
+    build_by_default: true
+  )
+
+  test(ex_name, exe_file)
+endforeach
+
+if can_benchmark
+  foreach ex : benchmark_programs
+    dir = ''
+    foreach dir_part : ex[0]
+      dir = dir / dir_part
+    endforeach
+    ex_name = (dir / ex[1]).underscorify()
+    ex_sources = []
+    foreach src : ex[2]
+      ex_sources += dir / src
+    endforeach
+
+    exe_file = executable(ex_name, ex_sources,
+      dependencies: [sigcxx_dep, benchmark_dep],
+      gui_app: false,
+      build_by_default: do_benchmark
+    )
+
+    if do_benchmark
+      test(ex_name, exe_file,
+        timeout: benchmark_timeout,
+      )
+    endif
+  endforeach
+endif
diff --git a/tools/dist-cmd.py b/tools/dist-cmd.py
new file mode 100755
index 0000000..30da5da
--- /dev/null
+++ b/tools/dist-cmd.py
@@ -0,0 +1,12 @@
+#!/usr/bin/env python3
+
+# External command, intended to be called with meson.add_dist_script() in meson.build.
+# meson.add_dist_script() can't call a script that's not committed to git.
+# This script shall be committed. It can be used for calling other non-committed scripts.
+
+# dist-cmd.py <cmd> <args>...
+
+import sys
+import subprocess
+
+sys.exit(subprocess.run(sys.argv[1:]).returncode)
diff --git a/tools/tutorial-custom-cmd.py b/tools/tutorial-custom-cmd.py
new file mode 100755
index 0000000..85b22e7
--- /dev/null
+++ b/tools/tutorial-custom-cmd.py
@@ -0,0 +1,173 @@
+#!/usr/bin/env python3
+
+# External command, intended to be called with custom_target() in meson.build
+
+#                           argv[1]   argv[2:]
+# tutorial-custom-cmd.py <subcommand> <xxx>...
+
+import os
+import sys
+import subprocess
+from pathlib import Path
+import shutil
+
+subcommand = sys.argv[1]
+
+def html():
+  #      argv[2]          argv[3]
+  # <input_xml_file> <output_html_dir>
+
+  input_xml_file = sys.argv[2]
+  output_html_dir = sys.argv[3]
+
+  # For a list of available parameters, see http://docbook.sourceforge.net/release/xsl/current/doc/html/
+  xslt_params = []
+
+  xslt_stylesheet = 'http://docbook.sourceforge.net/release/xsl/current/html/chunk.xsl'
+
+  # Remove old files and create the destination directory.
+  shutil.rmtree(output_html_dir, ignore_errors=True)
+  os.makedirs(output_html_dir, exist_ok=True)
+
+  cmd = [
+    'xsltproc',
+  ] + xslt_params + [
+    '-o', output_html_dir + '/',
+    '--xinclude',
+    xslt_stylesheet,
+    input_xml_file,
+  ]
+  result = subprocess.run(cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT,
+                          universal_newlines=True)
+  # xsltproc prints the names of all written files. Don't print those lines.
+  for line in result.stdout.splitlines():
+    if not line.startswith('Writing '):
+      print(line)
+
+  return result.returncode
+
+def xmllint():
+  #  argv[2]       argv[3]          argv[4]
+  # <validate> <input_xml_file> <stamp_file_path>
+
+  validate = sys.argv[2]
+  input_xml_file = sys.argv[3]
+  stamp_file_path = sys.argv[4]
+
+  cmd = [
+    'xmllint',
+    '--noout',
+    '--noent',
+    '--xinclude',
+  ]
+  if validate == 'true':
+    cmd += ['--postvalid']
+  cmd += [input_xml_file]
+  result = subprocess.run(cmd)
+  if result.returncode:
+    return result.returncode
+
+  Path(stamp_file_path).touch(exist_ok=True)
+  return 0
+
+def dblatex():
+  #      argv[2]         argv[3]
+  # <input_xml_file> <output_pdf_file>
+  # Create a PDF file, using dblatex.
+
+  input_xml_file = sys.argv[2]
+  output_pdf_file = sys.argv[3]
+
+  # For a list of available parameters, see http://dblatex.sourceforge.net/doc/manual/
+  dblatex_params = [
+    '-P', 'toc.section.depth=2',
+    '-P', 'paper.type=a4paper',
+  ]
+
+  cmd = [
+    'dblatex',
+  ] + dblatex_params + [
+    '-o', output_pdf_file,
+    '--pdf', input_xml_file,
+  ]
+  return subprocess.run(cmd).returncode
+
+def docbook2pdf():
+  #      argv[2]         argv[3]
+  # <input_xml_file> <output_pdf_file>
+  # Create a PDF file, using docbook2pdf.
+
+  input_xml_file = sys.argv[2]
+  output_pdf_file = sys.argv[3]
+
+  output_dir = os.path.dirname(output_pdf_file)
+  if not output_dir:
+    output_dir = '.'
+  output_basename = os.path.basename(output_pdf_file)
+  if output_basename.endswith('.pdf'):
+    output_basename = output_basename[:-4]
+  xml_file = os.path.join(output_dir, output_basename + '.xml')
+
+  # We need to produce an XML file with all of the XIncludes done.
+  cmd = [
+    'xmllint',
+    '--xinclude',
+    '--postvalid',
+    '--output', xml_file,
+    input_xml_file,
+  ]
+  result = subprocess.run(cmd)
+  if result.returncode:
+    return result.returncode
+
+  cmd = [
+    'docbook2pdf',
+    '--output', output_dir,
+    xml_file,
+  ]
+  return subprocess.run(cmd).returncode
+
+# Invoked from meson.add_dist_script().
+def dist_doc():
+  #    argv[2]        argv[3]        argv[4]    argv[5]
+  # <doc_dist_dir> <doc_build_dir> <xml_file> <pdf_file>
+
+  # <doc_dist_dir> is a distribution directory, relative to MESON_DIST_ROOT.
+  # <doc_build_dir> is a relative or absolute path in the build directory.
+  # <xml_file> is a relative or absolute path in the source directory.
+  # <pdf_file> is a relative or absolute path in the build directory.
+  doc_dist_dir = os.path.join(os.getenv('MESON_DIST_ROOT'), sys.argv[2])
+  doc_build_dir = sys.argv[3]
+  xml_file = sys.argv[4]
+  pdf_file = sys.argv[5]
+
+  # Create the distribution directory, if it does not exist.
+  os.makedirs(doc_dist_dir, exist_ok=True)
+
+  # Distribute built html files.
+  shutil.copytree(os.path.join(doc_build_dir, 'html'),
+                  os.path.join(doc_dist_dir, 'html'),
+                  copy_function=shutil.copy)
+
+  # If there is an updated PDF file, distribute it.
+  if os.path.isfile(pdf_file) and \
+     os.stat(pdf_file).st_mtime > os.stat(xml_file).st_mtime:
+    shutil.copy(pdf_file, doc_dist_dir)
+  else:
+    print('--- Info: No updated PDF file found.')
+
+  return 0
+
+# ----- Main -----
+if subcommand == 'html':
+  sys.exit(html())
+if subcommand == 'xmllint':
+  sys.exit(xmllint())
+if subcommand == 'dblatex':
+  sys.exit(dblatex())
+if subcommand == 'docbook2pdf':
+  sys.exit(docbook2pdf())
+if subcommand == 'dist_doc':
+  sys.exit(dist_doc())
+print(sys.argv[0], ': illegal subcommand,', subcommand)
+sys.exit(1)
diff --git a/untracked/README b/untracked/README
new file mode 100644
index 0000000..0f5e6f4
--- /dev/null
+++ b/untracked/README
@@ -0,0 +1,33 @@
+untracked/README
+
+This directory contains files not tracked by a source code control program,
+such as git. (This README file is the exception.)
+
+The files can have one of two origins.
+
+1. Copied by the mm-common-get command.
+2. Generated when libsigc++ is built.
+
+Files of type 2 exist here only if libsigc++ is built with maintainer-mode=false,
+or the directory comes from a tarball.
+Files of both types exist here only if libsigc++ is built with Meson,
+or the tarball is created with Meson.
+
+1. Files copied by mm-common-get
+--------------------------------
+untracked/docs/docs/doc-install.pl
+                    doc-postprocess.pl
+                    doxygen-extra.css
+                    tagfile-to-devhelp2.xsl
+untracked/build_scripts/dist-build-scripts.py
+                        dist-changelog.py
+                        doc-reference.py
+
+mm-common-get may copy more files, but they are not used by libsigc++.
+
+2. Generated files
+------------------
+untracked/docs/docs/reference/libsigc++-3.0.devhelp2
+                              libsigc++-3.0.tag
+                              html/*
+untracked/docs/docs/manual/html/*