Remove 1986/wall alt code

The alt code was just a patched (by Yusuke Endoh) version (two strings
were strdup()d) that still required -traditional-cpp. He is still
credited in the thanks file but one can do make diff_orig_prog to see
what was changed to make it not require -traditional-cpp and Yusuke's
fix is there too. The thanks file details what I had to do to make it
work without -traditional-cpp and his change is still there as well. It
seemed to serve no purpose to have an alt version that requires one to
use -traditional-cpp when one can just look at the original code if they
want to see what it was like back in 1986.

1986/wall/.gitignore

@@ -6,5 +6,4 @@ indent.c
 indent.o
 prog.orig
 wall
-wall.alt
 wall.orig

1986/wall/Makefile

@@ -117,8 +117,8 @@ OBJ= ${PROG}.o
 DATA=
 TARGET= ${PROG}
 #
-ALT_OBJ= ${PROG}.alt.o
-ALT_TARGET= ${PROG}.alt
+ALT_OBJ=
+ALT_TARGET=
 
 #################
 # build the entry
@@ -140,9 +140,6 @@ ${PROG}: ${PROG}.c
 alt: ${ALT_TARGET}
 	@${TRUE}
 
-${PROG}.alt: ${PROG}.alt.c
-	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
-
 # data files
 #
 data: ${DATA}

1986/wall/README.md

@@ -12,30 +12,6 @@ make all
 ```
 
 
-## Alternate code:
-
-If you have an old compiler or a compiler that supports `-traditional-cpp` you
-might enjoy looking at the original source in [wall.alt.c](wall.alt.c).
-
-
-### Alternate build:
-
-```sh
-# if you have an old enough compiler:
-make alt
-
-# or if you have gcc:
-make CC=gcc alt
-
-# or if you have a compiler that supports -traditional-cpp that's not gcc:
-make CFLAGS+="-traditional-cpp" alt
-```
-
-NOTE: gcc in macOS is actually clang even the binary `/usr/bin/gcc`.
-
-Use `./wall.alt` as you would `./wall`.
-
-
 ## Judges' remarks:
 
 The original version did not have a ';' character in the first line.

1986/wall/wall.alt.c

@@ -1,78 +0,0 @@
-#define _c(C)_ (C)&('|'+3):c_()(C)>>('\n'-3) __; /**/
-#define C char*
-#define keyboard ",,B3-u;.(&*5., /(b*(1\036!a%\031m,,,,,\r\n"
-#define main(o,oo)oo(o){
-#define _ ;case
-C
-#define c_(cc)c cc=
-#define C_(sand)_O(sand)witch
-o=keyboard;
-#define __ ;break;
-C
-ccc(
-cc)
-C
-cc;
-{ cc=strdup(cc);
-C
-cccc=
-cc;int
-#ifndef lint
-#define keyboard "dijs QH.soav Vdtnsaoh DmfpaksoQz;kkt oa, -dijs"
-#endif
-c;
-main(;c_(=(*cc);*cc++)c,for);
-#define _O(s)s
-main(0xb+(c>>5),C_(s))
-_'\v'
-:__ _'\f':
-main(c,C_(s));
-_c(8098)_c(6055)_c(14779)_c(10682)
-#define O_(O)_O(O)stem(ccc(
-_c(15276)_c(11196)_c(15150)
-#define _C ;return
-_c(11070)_c(15663)_c(11583)
-}
-__
-default
-:c_(+)o[c&__LINE__-007];
-main(c_(-)'-'-1,C_(s))_
-0214
-:_
-0216
-:c_(+)025 _
-0207
-:c_(-)4 _
-0233
-:c_(+)' '-1;
-}}c_(&)'z'+5;
-}_C cccc;
-}main(,cc)
-C
-#define O write(1,
-c=strdup("O");
-O_(sy) keyboard));
-main(;;,for);
-read(0,
-c,1);*
-c_(&)'~'+1
-;O ccc(
-c),
-'\0');
-main(*c,
-C_(s));_
-4
-:O_(sy)";kkt -oa, dijszdijs QQ"))_C
-_
-13
-:O o+' ',
-3
-)
-#undef main
-__ _ 127:O"\b \b",3)__
-default
-:O
-c,1)
-__}}}main(){
-cc();
-}

thanks-for-help.md

@@ -419,16 +419,13 @@ code](/1986/wall/wall.orig.c) to see how different C was in 1986, as well as
 below.
 
 [Yusuke](#yusuke) originally patched this to use `strdup()` on two strings and this let it
-work with gcc but it still required `-traditional-cpp`. The [alternate
-code](/1986/wall/wall.alt.c) is the version patched by Yusuke should you wish to
-try it with a compiler that has the `-traditional-cpp`. See the README.md file
-for details.
+work with gcc but it still required `-traditional-cpp`.
 
 If you'd like to see the difference between the version that requires
 `-traditional-cpp` and the fixed version, try:
 
 ```sh
-cd 1986/wall ; make diff_alt_prog
+cd 1986/wall ; make diff_orig_prog
 ```
 
 Some of the changes required:
@@ -495,6 +492,9 @@ Some of the changes required:
 
 	    :system(ccc(";kkt -oa, dijszdijs QQ"));return
 
+- And of course as noted two strings had to be `strdup()`d.
+
+There might have been other changes as well.
 
 
 # <a name="1987"></a>1987