Install Script Error during compile

[Jack Straw]

Good day,   Installing Nessus 2.0 on Slackware 8.1 gcc ver. 2.95.3   Attempted to install:  "nessus-installer.sh" via 'sh nessus-installer.sh'   It ended up erroring out with the following:   ***SNIP*** /usr/i386-slackware-linux/bin/ld: cannot find -lXext collect2: ld returned 1 exit status make[1]: *** [nessus] Error 1 make: *** [client] Error 2 **** An error occured :/ Do you want to save the compilation log to analyze what went wrong ? [y] ***SNIP***   Here are the last few lines of my nessus_compilation   ***SNIP*** gcc -g -O2  `sh ./cflags`        -c filter.c gcc -g -O2  `sh ./cflags`        -c dirutils.c gcc -g -O2  `sh ./cflags`        -c sslui.c gcc -g -O2  `sh ./cflags`        -c nessus.c gcc  auth.o comm.o sighand.o xstuff.o cli.o parser.o plugin_infos.o preferences.o families.o attack.o report.o report_ng.o report_save.o report_utils.o nsr_output.o nbe_output.o html_output.o latex_output.o text_output.o xml_output.o xml_output_ng.o html_graph_output.o error_dialog.o password_dialog.o monitor_dialog.o backend.o data_mining.o prefs_dialog.o prefs_dialog_misc.o prefs_dialog_scan_opt.o prefs_dialog_user.o prefs_dialog_auth.o prefs_dialog_plugins_prefs.o prefs_plugins.o prefs_target.o prefs_about.o prefs_kb.o netmap.o detached_index.o read_target_file.o gdchart0.94b/gdc.o gdchart0.94b/price_conv.o gdchart0.94b/gdc_pie.o gdchart0.94b/gdchart.o regex.o filter.o dirutils.o sslui.o nessus.o    -o nessus `/usr/local/bin/nessus-config --libs`   -L/usr/lib -L/usr/X11R6/lib -lgtk -lgdk -rdynamic -lgmodule -lglib -ldl -lXext -lX11 -lm -L/usr/lib -lglib   gdchart0.94b/gd1.3/libgd.a -lm make[1]: Leaving directory `/tmp/nessus-installer.5021/nessus-core/nessus' ***SNIP EOF***   I confess I am only an amateur to all of this so I am a little baffled.  I can make available my entire compilation log however it is very large as this error seems to have appeared towards the very end of the install.   Any ideas?  Is there more information I could provide you with?   Thanks in advance.   jon