GNU cflow analyzes C source files and produces a graph charting the control flow of the program. It can output the graph in several styles and in either the POSIX format or in an extended GNU format. cflow also includes a major mode for Emacs for examining the flowcharts that it produces.

GNU complexity provides tools for finding procedures that are convoluted, overly long or otherwise difficult to understand. This may help in learning or reviewing unfamiliar code or perhaps highlighting your own code that seemed comprehensible when you wrote it.

Cscope is a text screen based source browsing tool. Although it is primarily designed to search C code (including lex and yacc files), it can also be used for C++ code.

Using cscope, you can easily search for where symbols are used and defined.

Xenon is a monitoring tool based on Radon. It monitors code complexity. Ideally, xenon is run every time code is committed. Through command line options, various thresholds can be set for the complexity of code. It will fail (i.e., it will exit with a non-zero exit code) when any of these requirements is not met.

GNU GLOBAL is a source code tagging system that functions in the same way across a wide array of environments, such as different text editors, shells and web browsers. The resulting tags are useful for quickly moving around in a large, deeply nested project.

The lcov-to-cobertura Python module converts code coverage report files in the lcov format to the XML format of Cobertura, a Java code coverage tool. It allows continuous integration servers like Jenkins to aggregate results and determine build stability.

The Silver Searcher (ag) is a tool for quickly searching large numbers of files. It's intended primarily for source code repositories, and respects files like .gitignore and .hgignore. It's also an order of magnitude faster than its inspiration, ack, and less specialised tools such as grep.

make2graph creates a graph of dependencies from GNU Make. The output is a graphviz-dot file, a Gexf-XML file or a list of the deepest independent targets.

Sourcetrail is a free and open-source cross-platform source explorer that helps you get productive on unfamiliar source code. It includes support for C/C++, providing a graphical means for discovering symbols and their place in a project.

This package provides a complete GCC tool chain for C/C++ development to be installed in user profiles. This includes GCC, as well as libc (headers and binaries, plus debugging symbols in the debug output), and Binutils. GCC is the GNU Compiler Collection.

This package provides a small sample of UTF-8 locales mostly useful in test environments.

This package provides a complete GCC tool chain for C/C++ development to be installed in user profiles. This includes GCC, as well as libc (headers and binaries, plus debugging symbols in the debug output), and Binutils. GCC is the GNU Compiler Collection.

This package provides a complete GCC tool chain for C/C++ development to be installed in user profiles. This includes GCC, as well as libc (headers and binaries, plus debugging symbols in the debug output), and Binutils. GCC is the GNU Compiler Collection.

This package provides a complete GCC tool chain for C/C++ development to be installed in user profiles. This includes GCC, as well as libc (headers and binaries, plus debugging symbols in the debug output), and Binutils. GCC is the GNU Compiler Collection.

This package provides a complete GCC tool chain for C/C++ development to be installed in user profiles. This includes GCC, as well as libc (headers and binaries, plus debugging symbols in the debug output), and Binutils. GCC is the GNU Compiler Collection.

This package provides a complete GCC tool chain for C/C++ development to be installed in user profiles. This includes GCC, as well as libc (headers and binaries, plus debugging symbols in the debug output), and Binutils. GCC is the GNU Compiler Collection.

This package provides a complete GCC tool chain for C/C++ development to be installed in user profiles. This includes GCC, as well as libc (headers and binaries, plus debugging symbols in the debug output), and Binutils. GCC is the GNU Compiler Collection.

This package provides a complete GCC tool chain for C/C++ development to be installed in user profiles. This includes GCC, as well as libc (headers and binaries, plus debugging symbols in the debug output), and Binutils. GCC is the GNU Compiler Collection.

The linker wrapper (or ld-wrapper) wraps the linker to add any missing -rpath flags, and to detect any misuse of libraries outside of the store.

This package provides a complete GCC tool chain for Fortran development to be installed in user profiles. This includes gfortran, as well as libc (headers and binaries, plus debugging symbols in the debug output), and binutils.

This package provides a small sample of UTF-8 locales mostly useful in test environments.

Guile is the GNU Ubiquitous Intelligent Language for Extensions, the official extension language of the GNU system. It is an implementation of the Scheme language which can be easily embedded in other applications to provide a convenient means of extending the functionality of the application without requiring the source code to be rewritten.

The linker wrapper (or ld-wrapper) wraps the linker to add any missing -rpath flags, and to detect any misuse of libraries outside of the store.

This package provides a complete GCC tool chain for C/C++ development to be installed in user profiles. This includes GCC, as well as libc (headers and binaries, plus debugging symbols in the debug output), and Binutils. GCC is the GNU Compiler Collection.