compiles like a charm

Makefile

@@ -1,8 +1,9 @@
-CC=gcc
+#
 
-CFLAGS=-Wall -Werror -Wextra -pedantic
+CFLAGS= -Wall -Werror -Wextra -pedantic \
+	-std=gnu99
 
-LDFLAGS=-lm  -lXaw -lXmu -lXt -lSM -lICE -lXpm -lXext -lX11
+LDFLAGS=-lm -lXaw -lXt -lX11
 # gcc -o xdu -O2 -fno-strength-reduce -fno-strict-aliasing      -L/usr/lib64   xdu.o xwin.o -lXaw -lXmu -lXt -lSM -lICE -lXpm  -lXext -lX11
 
 SRCS = xdu.c xwin.c
@@ -15,7 +16,11 @@ xdu: $(OBJS)
 
 xwin.o: xwin.c
 
+xdu.o: xdu.c
+
 clean:
 	rm -f xdu xdu.o xwin.o
 
-#
+.PHONY: nice
+nice:
+	indent -kr -l0 --no-tabs $(SRCS)

README.md

@@ -0,0 +1,99 @@
+# xdu (patched) - display the output of `du -k` in an X window
+
+`xdu` is a program for displaying a graphical tree of disk space utilization as reported by the UNIX utility `du`.  You can navigate up and down in the tree, sort things, and print out information.  See the manual page for details.
+
+This version has been patched for more functions.
+- key `n` : change size display ( bytes, MiB, GiB, TiB )
+- key `p` : print as postscript
+- option `-f` : set postscript file name
+
+This is a *works-for-me* release.
+
+## compilation
+
+`make`
+
+## installation
+
+`cp`
+
+
+No `autoconf`, `hg`, `docker`, `what-ever`. Never. Ever. This is ~1500 lines of pure C. Get a life!
+
+See the `XDu.ad` file if e.g. you have problems with the selected font.
+
+
+## usage
+
+```
+du -k /usr | xdu
+```
+
+This release was tested against MarIuX.
+
+## Revision History
+
+### Version 3.0p6 - Jul 10 2017
+- `githubify`
+- code cleanup for fixing bugs
+- *works-for-me* Makefile
+- `-Wall -Werror -Wextra -pedantic`
+- Peter Marquardt, `marquardt_p@molgen.mpg.de`
+
+### Version 3.0p5 - Feb 16 2012
+
+### Version 3.0p4 - Mar 16 2007
+
+### Version 3.0p3 - Apr 9 1997
+- new option `-f` and new key `p`
+- Marius Tolzmann, `tolzmann@mpimg-berlin-dahlem.mpg.de`
+
+### Version 3.0p2 - Oct 1 1998
+- added ability to print postscriptfiles Thr Oct 1 12:17 MET DST 1998 by
+- Marius Tolzmann, `tolzmann@mpimg-berlin-dahlem.mpg.de`
+
+### Version 3.0	5 - Jun 1994
+- X11R6 contrib release
+- Popup help window
+- Now uses Athena widgets, but no menus or buttons yet
+
+### Version 2.1	22 - Jul 1993
+- Fixed a bug in the sorting code where traversal back up a sorted tree could land you in the wrong parent directory.
+
+### Version 2.0	21 - Jul 1993
+- Added sorting.
+- Command line options.
+- More resources.
+- Better redraw behavior.
+- Bug fixes (to handle trailing slashes and directories with no or zero size information).
+
+### Version 1.1	5 - Oct 1991
+- Added resource control
+- Display of size information
+- More accurate label positioning
+
+### Version 1.0	4 - Sep 1991
+- First public release
+
+# Acknowledgements
+
+## xdu-3.0p
+Marius Tolzmann <m@rius.berlin>
+Peter Marquardt <marquardt_p@molgen.mpg.de>
+
+## xdu-3.0
+Bug reports and code fixes from:
+
+Casey Leedom `<casey@gauss.llnl.gov>`
+Stephen Gildea `<gildea@expo.lcs.mit.edu>`
+Nelson Minar `<nelson@reed.edu>`
+Don Tiessen `<dtiessen@silver.cs.umanitoba.ca>`
+Gerry Tomlinson `Gerry.Tomlinson@newcastle.ac.uk`
+Mark Evans `<mre1@itri.bton.ac.uk>`
+Juha Takala `<jta@piuha.sah.vtt.fi>`
+
+And the many others who told me what they thought about it.
+
+Originally developed by:
+
+Phil Dykstra, `<phil@arl.mil>` `http://info.arl.mil/~phil/`

XDu.ad

@@ -0,0 +1,18 @@
+!
+!  XDu Resources
+!
+!  I recommend the "-*-helvetica-bold-r-normal--14-*" font, but if
+!    you don't have it, or want your server default, then change it
+!    or comment it out respectively.
+!  Order choices: first, last, alpha, ralpha, size, rsize
+!  Color to taste.
+!
+!XDu*foreground:	yellow
+!XDu*background:	blue4
+!XDu*help*foreground:	green
+!XDu*help*background:	red4
+XDu*window.width:	600
+XDu*window.height:	480
+XDu.font:		-misc-fixed-medium-*-*-*-10-*-*-*-*-*-*-*
+XDu.ncol:		5
+XDu.psfile:		xdu_out.ps