| [PCRE2](http://www.pcre.org/) | The PCRE library is a set of functions that implement regular expression pattern matching using the same syntax and semantics as Perl 5. |
| [PCRE2](http://www.pcre.org/) | The PCRE library is a set of functions that implement regular expression pattern matching using the same syntax and semantics as Perl 5. |
| [pkg-config](http://www.freedesktop.org/wiki/Software/pkg-config/) | pkg-config is a helper tool used when compiling applications and libraries. It helps you insert the correct compiler options on the command line so an application can use gcc -o test test.c `pkg-config --libs --cflags glib-2.0` for instance, rather than hard-coding values on where to find glib (or other libraries). |
| [pkg-config](http://www.freedesktop.org/wiki/Software/pkg-config/) | pkg-config is a helper tool used when compiling applications and libraries. It helps you insert the correct compiler options on the command line so an application can use gcc -o test test.c `pkg-config --libs --cflags glib-2.0` for instance, rather than hard-coding values on where to find glib (or other libraries). |