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libsigc++ implements a typesafe callback system for standard C++. (uses zig build)

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libsigc++

Typesafe Callback Framework for C++

Introduction

libsigc++ (a.k.a. libsigcplusplus) implements a typesafe callback system for standard C++. It allows you to define signals and to connect those signals to any callback function, either global or a member function, regardless of whether it is static or virtual.

libsigc++ is used by gtkmm to wrap the GTK signal system. It does not depend on GTK or gtkmm.

sigc++-2.0 and sigc++-3.0 are different parallel-installable ABIs. This file describes sigc++-3.0.

License

Distribution of library and components is under the LGPL as listed in the file COPYING. Examples and tests are Public Domain.

Compatibility

Compatible compilers must support C++17, such as the decltype(auto) specifier (from C++14) and std::invoke().

General information

Web site

Download location

Reference documentation

Tarballs contain reference documentation. In tarballs generated with Meson, see the untracked/docs/docs/reference/html directory.

Discussion on GNOME's discourse forum

Git repository

Bugs can be reported to

Patches can be submitted to

Building

Whenever possible, you should use the official binary packages approved by the supplier of your operating system, such as your Linux distribution. For instance, Ubuntu Linux, Debian Linux and Fedora Linux have official libsigc++ packages.

Building from a release tarball

Building from a release tarball is easier than building from git.

It's easiest to build with Meson, if the tarball was made with Meson, and to build with Autotools, if the tarball was made with Autotools. Then you don't have to use maintainer-mode.

How do you know how the tarball was made? If it was made with Meson, it contains files in untracked/build_scripts/, untracked/docs/ and possibly other subdirectories of untracked/.

Building from a tarball with Meson

Don't call the builddir 'build'. There is a directory called 'build' with files used by Autotools.

For instance:

# If the tarball was made with Autotools, and you want to rebuild the reference
# documentation, you must enable maintainer-mode:
$ meson setup --prefix=/some_directory --libdir=lib -Dmaintainer-mode=true your_builddir .

# If the tarball was made with Meson, or you don't want to rebuild the docs:
$ meson setup --prefix=/some_directory --libdir=lib your_builddir .

# then:
$ cd your_builddir
$ ninja
$ ninja install
# You can run the tests like so:
$ ninja test

Building from a tarball with Autotools

For instance:

# If the tarball was made with Autotools:
$ ./configure --prefix=/some_directory

# If the tarball was made with Meson, you must enable maintainer-mode:
$ ./autogen.sh --prefix=/some_directory

# then:
$ make
$ make install
# You can build the examples and tests, and run the tests, like so:
$ make check

Building from git

Building from git can be difficult so you should prefer building from a release tarball unless you need to work on the libsigc++ code itself.

jhbuild can be a good help. See the jhbuild repo, the jhbuild wiki and the jhbuild manual.

Building from git with Meson

You must have Meson properly installed (meson, ninja, etc) and you will also need mm-common version 1.0.0 or higher.

Maintainer-mode is enabled by default when you build from a git clone.

Don't call the builddir 'build'. There is a directory called 'build' with files used by Autotools.

$ meson setup --prefix=/some_directory --libdir=lib your_builddir .
$ cd your_builddir
$ ninja
$ ninja install
# You can run the tests like so:
$ ninja test
# You can create a tarball like so:
$ ninja dist

Building from git with Autotools

You must have Autotools properly installed (autoconf, automake, etc) and you will also need mm-common.

$ ./autogen.sh --prefix=/some_directory
$ make
$ make install
# You can build the examples and tests, and run the tests, like so:
$ make check
# You can create a tarball like so:
$ make distcheck
# or
$ make dist

Building from git with CMake

The CMake build is not used very often by the libsigc++ developers, but it should work, and we would welcome improvements.

For instance:

$ mkdir libsigcplusplus_build
$ cd libsigcplusplus_build
$ cmake path/to/libsigcplusplus
$ make

Building with Microsoft Visual C++

See MSVC-Builds.md

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libsigc++ implements a typesafe callback system for standard C++. (uses zig build)

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