On some systems, particularly on GNU/Linux, these libraries may
already be present or available as additional packages. Note that if
-there is a separate `devel' package, for use at compilation time
-rather than run time, you will need that as well as the corresponding
-run time package; typically the devel package will contain header
-files and a library archive. Otherwise, you can download and build
-libraries from sources. None of them are vital for running Emacs;
-however, note that Emacs will not be able to use colored icons in the
-toolbar if XPM support is not compiled in.
+there is a separate `dev' or `devel' package, for use at compilation
+time rather than run time, you will need that as well as the
+corresponding run time package; typically the dev package will
+contain header files and a library archive. Otherwise, you can
+download and build libraries from sources. None of them are vital for
+running Emacs; however, note that Emacs will not be able to use
+colored icons in the toolbar if XPM support is not compiled in.
Here's the list of these optional libraries, and the URLs where they
can be found: