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meson/docs/markdown/Gnome-module.md

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GNOME module

This module provides helper tools for build operations needed when building Gnome/GLib programs.

Note: the compilation commands here might not work properly when you change the source files. This is a bug in the respective compilers which do not expose the required dependency information. This has been reported upstream in this bug. Until this is fixed you need to be careful when changing your source files.

Usage

To use this module, just do: gnome = import('gnome'). The following functions will then be available as methods on the object with the name gnome. You can, of course, replace the name gnome with anything else.

gnome.compile_resources()

This function compiles resources specified in an XML file into code that can be embedded inside the main binary. Similar a build target it takes two positional arguments. The first one is the name of the resource and the second is the XML file containing the resource definitions. If the name is foobar, Meson will generate a header file called foobar.h, which you can then include in your sources.

  • c_name: passed to the resource compiler as an argument after --c-name

  • dependencies: extra targets to depend upon for building

  • export: (Added 0.37.0) if true, export the symbols of the generated sources

  • extra_args: extra command line arguments to pass to the resource

  • gresource_bundle: (Added 0.37.0) if true, output a .gresource file instead of source

  • install: (Added 0.37.0) if true, install the gresource file

  • install_dir: (Added 0.37.0) location to install the header or bundle depending on previous options

  • install_header: (Added 0.37.0) if true, install the header file

  • source_dir: a list of subdirectories where the resource compiler should look up the files, relative to the location of the XML file

    compiler

Returns an array containing: [c_source, header_file] or [gresource_bundle]

gnome.generate_gir()

Generates GObject introspection data. Takes one positional argument, the build target you want to build gir data for. There are several keyword arguments. Many of these map directly to the g-ir-scanner tool so see its documentation for more information.

  • dependencies: deps to use during introspection scanning

  • extra_args: command line arguments to pass to gir compiler

  • export_packages: extra packages the gir file exports

  • sources: the list of sources to be scanned for gir data

  • nsversion: namespace version

  • namespace: the namespace for this gir object which determines output files

  • identifier_prefix: the identifier prefix for the gir object, e.g. Gtk

  • includes: list of gir names to be included, can also be a GirTarget

  • include_directories: extra include paths to look for gir files

  • install: if true, install the generated files

  • install_dir_gir: (Added 0.35.0) which directory to install the gir file into

  • install_dir_typelib: (Added 0.35.0) which directory to install the typelib file into

  • link_with: list of libraries to link with

  • symbol_prefix: the symbol prefix for the gir object, e.g. gtk

Returns an array of two elements which are: [gir_target, typelib_target]

gnome.genmarshal()

Generates a marshal file using the glib-genmarshal tool. The first argument is the basename of the output files.

  • extra_args: (Added 0.42.0) additional command line arguments to pass
  • install_header: if true, install the generated header
  • install_dir: directory to install header to
  • nostdinc: if true, don't include the standard marshallers from glib
  • internal: if true, mark generated sources as internal to glib-genmarshal (Requires GLib 2.54)
  • prefix: the prefix to use for symbols
  • skip_source: if true, skip source location comments
  • stdinc: if true, include the standard marshallers from glib
  • sources: the list of sources to use as inputs
  • valist_marshallers: if true, generate va_list marshallers

Added 0.35.0

Returns an array of two elements which are: [c_source, header_file]

gnome.mkenums()

Generates enum files for GObject using the glib-mkenums tool. The first argument is the base name of the output files.

This method is essentially a wrapper around the glib-mkenums tool's command line API. It is the most featureful method for enum creation.

Typically you either provide template files or you specify the various template sections manually as strings.

Most libraries and applications will be using the same standard template with only minor tweaks, in which case the gnome.mkenums_simple() convenience method can be used instead.

Note that if you #include the generated header in any of the sources for a build target, you must add the generated header to the build target's list of sources to codify the dependency. This is true for all generated sources, not just mkenums.

  • c_template: template to use for generating the source
  • comments: comment passed to the command
  • h_template: template to use for generating the header
  • identifier_prefix: prefix to use for the identifiers
  • install_header: if true, install the generated header
  • install_dir: directory to install the header
  • sources: the list of sources to make enums with
  • symbol_prefix: prefix to use for the symbols
  • eprod: enum text
  • fhead: file header
  • fprod: file text
  • ftail: file tail
  • vhead: value text
  • vtail: value tail

Added 0.35.0

Returns an array of two elements which are: [c_source, header_file]

gnome.mkenums_simple()

Generates enum .c and .h files for GObject using the glib-mkenums tool with the standard template used by most GObject-based C libraries. The first argument is the base name of the output files.

Note that if you #include the generated header in any of the sources for a build target, you must add the generated header to the build target's list of sources to codify the dependency. This is true for all generated sources, not just mkenums_simple.

  • body_prefix: additional prefix at the top of the body file, e.g. for extra includes
  • decorator: optional decorator for the function declarations, e.g. GTK_AVAILABLE or GST_EXPORT
  • function_prefix: additional prefix for function names, e.g. in case you want to add a leading underscore to functions used only internally
  • header_prefix: additional prefix at the top of the header file, e.g. for extra includes (which may be needed if you specify a decorator for the function declarations)
  • install_header: if true, install the generated header
  • install_dir: directory to install the header
  • identifier_prefix: prefix to use for the identifiers
  • sources: the list of sources to make enums with
  • symbol_prefix: prefix to use for the symbols

Example:

gnome = import('gnome')

my_headers = ['myheader1.h', 'myheader2.h']
my_sources = ['mysource1.c', 'mysource2.c']

# will generate myenums.c and myenums.h based on enums in myheader1.h and myheader2.h
enums = gnome.mkenums_simple('myenums', sources : my_headers)

mylib = library('my', my_sources, enums,
                include_directories: my_incs,
                dependencies: my_deps,
                c_args: my_cargs,
                install: true)

Added 0.42.0

Returns an array of two elements which are: [c_source, header_file]

gnome.compile_schemas()

When called, this method will compile the gschemas in the current directory. Note that this is not for installing schemas and is only useful when running the application locally for example during tests.

gnome.gdbus_codegen()

Compiles the given XML schema into gdbus source code. Takes two positional arguments, the first one specifies the name of the source files and the second specifies the XML file name.

  • interface_prefix: prefix for the interface
  • namespace: namespace of the interface
  • object_manager: (Added 0.40.0) if true generates object manager code
  • annotations: (Added 0.43.0) list of lists of 3 strings for the annotation for 'ELEMENT', 'KEY', 'VALUE'
  • docbook: (Added 0.43.0) prefix to generate 'PREFIX'-NAME.xml docbooks

Returns an opaque object containing the source files. Add it to a top level target's source list.

Example:

gnome = import('gnome')

# The returned source would be passed to another target
gdbus_src = gnome.gdbus_codegen('example-interface', 'com.example.Sample.xml',
  interface_prefix : 'com.example.',
  namespace : 'Sample',
  annotations : [
    ['com.example.Hello()', 'org.freedesktop.DBus.Deprecated', 'true']
  ],
  docbook : 'example-interface-doc'
)

gnome.generate_vapi()

Creates a VAPI file from gir. The first argument is the name of the library.

  • gir_dirs: extra directories to include for gir files
  • install: if true, install the VAPI file
  • install_dir: location to install the VAPI file (defaults to datadir/vala/vapi)
  • metadata_dirs: extra directories to include for metadata files
  • packages: VAPI packages that are depended upon
  • sources: the gir source to generate the VAPI from
  • vapi_dirs: extra directories to include for VAPI files

Returns a custom dependency that can be included when building other VAPI or Vala binaries.

Added 0.36.0

gnome.yelp()

Installs help documentation using Yelp. The first argument is the project id.

This also creates two targets for translations help-$project-update-po and help-$project-pot.

  • languages: list of languages for translations
  • media: list of media such as images
  • sources: list of pages
  • symlink_media: if media should be symlinked not copied (defaults to true since 0.42.0)

Note that very old versions of yelp may not support symlinked media; At least 3.10 should work.

Added 0.36.0

gnome.gtkdoc()

Compiles and installs gtkdoc documentation into prefix/share/gtk-doc/html. Takes one positional argument: The name of the module.

  • content_files: a list of content files
  • dependencies: a list of dependencies
  • fixxref_args: a list of arguments to pass to gtkdoc-fixxref
  • gobject_typesfile: a list of type files
  • ignore_headers: a list of header files to ignore
  • html_assets: a list of assets for the HTML pages
  • html_args a list of arguments to pass to gtkdoc-mkhtml
  • install: if true, installs the generated docs
  • install_dir: the directory to install the generated docs relative to the gtk-doc html dir or an absolute path (default: module name)
  • main_xml: specifies the main XML file
  • main_sgml: equal to main_xml
  • mkdb_args: a list of arguments to pass to gtkdoc-mkdb
  • scan_args: a list of arguments to pass to gtkdoc-scan
  • scanobjs_args: a list of arguments to pass to gtkdoc-scangobj
  • src_dir: include_directories to include

This creates a $module-doc target that can be ran to build docs and normally these are only built on install.

gnome.gtkdoc_html_dir()

Takes as argument a module name and returns the path where that module's HTML files will be installed. Usually used with install_data to install extra files, such as images, to the output directory.