To build SLmon you may need several other packages:
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The S-Lang library for text-based UI. It's available from
    ftp://space.mit.edu/pub/davis/slang/
You may decide to build without S-Lang (--without-slang) to get
non-interactive UI.

The popt library for command line options parsing.
    ftp://ftp.redhat.com/pub/redhat/code/popt/
If you decide to build without it long options and option aliasing won't
be available and getopt will be used instead. (--without-popt) If neither
popt nor getopt are found command line options won't be available.

LibGTop library for getting system specific data such as CPU and
Memory Usage. It's available from
    ftp://ftp.gnome.org/pub/GNOME/sources/libgtop/
However LibGTop will require you to have GNOME installed. On Linux systems
it's possible to build without LibGTop (--without-libgtop).

Use --enable-strip option to strip compiled binary.