GPLv3+ and GPLv3+ with exceptions and GPLv2+ with exceptions and LGPLv2+ and BSD
(GPL-3.0-or-later AND LGPL-3.0-or-later AND MIT-open-group AND CC-BY-4.0)
LGPLv2+ and LGPLv2+ with exceptions and GPLv2+ and GPLv2+ with exceptions and BSD and Inner-Net-2.0 and ISC and Public Domain and GFDL-1.3-only
GTK+ is an object-oriented widget toolkit written in the programming language C; it has a C-based object-oriented architecture that allows for maximum flexibility. The GTK+ library contains a set of graphical control elements (widgets)for creating graphical user interfaces. This package contains version 3 of GTK+.
acquired package info from repodata DB: repodata/18c2be42fe2b5b288fc0e4628777cec64a6dd8c9b9c960757aa68407d41ebc3f-primary.sqlite.bz2
The libstdc++ package contains a rewritten standard compliant GCC Standard C++ Library.
Cairo is a 2D graphics libarary with support for multiple output devices. It provides high-quality display and print output and this package also contains functionality to make cairo graphics library integrate well with GObject used by GNOME.
VTE provides a virtual terminal widget for GTK applications.VTE is mainly used in gnome-terminal, but can also be used to embed a console/terminal in games, editors, IDEs, etc.
This package contains GCC shared support library which is needed e.g. for exception handling support.
The GNU C Library project provides the core libraries for the GNU system and GNU/Linux systems, as well as many other systems that use Linux as the kernel. These libraries provide critical APIs including ISO C11, POSIX.1-2008, BSD, OS-specific APIs and more. These APIs include such foundational facilities as open, read, write, malloc, printf, getaddrinfo, dlopen, pthread_create, crypt, login, exit and more.
Zlib is a free, general-purpose, not covered by any patents, lossless data-compression library for use on virtually any computer hardware and operating system. The zlib data format is itself portable across platforms.
The core library that forms the basis for projects such as GTK+ and GNOME
GLib is a bundle of three (formerly five) low-level system libraries written in C and developed mainly by GNOME. GLib's code was separated from GTK, so it can be used by software other than GNOME and has been developed in parallel ever since.
The GNU Secure Communication Protocol Library
GnuTLS is a secure communications library implementing the SSL, TLS and DTLS protocols and technologies around them. It provides a simple C language application programming interface (API) to access the secure communications protocols as well as APIs to parse and write X.509, PKCS #12, and other required structures. The project strives to provide a secure communications back-end, simple to use and integrated with the rest of the base Linux libraries. A back-end designed to work and be secure out of the box, keeping the complexity of TLS and PKI out of application code.
PCRE2 is a re-working of the original PCRE1 library to provide an entirely new API. Since its initial release in 2015, there has been further development of the code and it now differs from PCRE1 in more than just the API. PCRE2 is written in C, and it has its own API. There are three sets of functions, one for the 8-bit library, which processes strings of bytes, one for the 16-bit library, which processes strings of 16-bit values, and one for the 32-bit library, which processes strings of 32-bit values. Unlike PCRE1, there are no C++ wrappers. The distribution does contain a set of C wrapper functions for the 8-bit library that are based on the POSIX regular expression API (see the pcre2posix man page). These are built into a library called libpcre2-posix. Note that this just provides a POSIX calling interface to PCRE2; the regular expressions themselves still follow Perl syntax and semantics. The POSIX API is restricted, and does not give full access to all of PCRE2's facilities.