Fix 2013/hou/Makefile for a.c

I noticed a problem with my improvement to the Makefile allowing one to
not use a temporary file so although the 'all' rule uses that method one
can still generate a.c so one can follow the author's remarks.

Links to this file were changed to code blocks, however, as the file
does not always exist. make clobber will remove a and a.c.

2013/hou/Makefile

@@ -114,6 +114,9 @@ OBJ= ${PROG}.o
 DATA= luna.jpg old_default.jpg otherroom.jpg otherroom.scene \
 	doc/camera.png doc/cosine.png doc/draft.png doc/example.md
 TARGET= ${PROG}
+OTHER_PROG= a
+OTHER_SRC= a.c
+OTHER_OBJ= a.o
 #
 ALT_OBJ=
 ALT_TARGET=
@@ -135,6 +138,13 @@ ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
 	./${PROG} | ${CC} ${CFLAGS} -x c - -o $@ ${LDFLAGS}
 
+${OTHER_PROG}: ${PROG}.c
+	${CC} ${CFLAGS} $< -o $@ ${LIBS}
+
+${OTHER_SRC}: ${OTHER_PROG}
+	${RM} -f $@
+	./${OTHER_PROG} > $@
+
 
 # alternative executable
 #
@@ -207,7 +217,7 @@ clean:
 
 clobber: clean
 	${RM} -f ${TARGET} ${ALT_TARGET}
-	${RM} -rf *.dSYM luna.ppm old_default.ppm otherroom.ppm
+	${RM} -rf *.dSYM luna.ppm old_default.ppm otherroom.ppm a a.c
 	@-if [ -e sandwich ]; then \
 	    ${RM} -f sandwich; \
 	    echo 'ate sandwich'; \

2013/hou/README.md

@@ -65,16 +65,18 @@ program.
 This program will loop infinitely while progressively refining a
 [raytraced](https://en.wikipedia.org/wiki/Ray_tracing_(graphics)) image.
 
-NOTE: the author refers to [a.c](%%REPO_URL%%/2013/hou/a.c), placed in a gzipped file `a.c.gz`. We do not
+NOTE: the author refers to `a.c`, placed in a gzipped file `a.c.gz`. We do not
 include it but it can be generated like:
 
 ``` <!---sh-->
-    cc -Wall hou.c -o hou -lm
+    make a.c
-    ./hou > a.c
 ```
 
-but there is no need to do this as the Makefile takes care of it without even
+There is no longer a need to do this as the Makefile takes care of it without
-needing to create a temporary file.
+even needing to create a temporary file but as the author refers to it and its
+uses it can still be generated to follow along.
+
+
 
 
 ## Author's remarks:
@@ -148,15 +150,15 @@ restrictions](#self-imposed-restrictions) section below for more details.
 * Neither [hou.c](%%REPO_URL%%/2013/hou/hou.c) nor [a.c](%%REPO_URL%%/2013/hou/a.c) (the *real* decompressed source) uses
 `#define` (or `cc -D`) at all.
 * The source code is not required at runtime.
-* [a.c](%%REPO_URL%%/2013/hou/a.c) does not drop optional features to reduce size. There are pure
+* `a.c` does not drop optional features to reduce size. There are pure
 optimization code that can be dropped without affecting the converged output
 (only affecting the ray tracing speed / convergence rate). All files are
 properly `fopen()`ed with `"rb"` / `"wb"` for Windows compatibility. The PPM
 header has a comment line for non-standard-compliant viewers (specifically, my
 old HDRShop 1.0). And there is a nice text message saying "please wait...".
-Despite the messy look, [a.c](%%REPO_URL%%/2013/hou/a.c) and [hou.c](%%REPO_URL%%/2013/hou/hou.c) compile warning-free
+Despite the messy look, `a.c` and [hou.c](%%REPO_URL%%/2013/hou/hou.c) compile warning-free
 ([hou.c](%%REPO_URL%%/2013/hou/hou.c) even wastes 18 bytes on `#include<stdio.h>` just for `putchar(3)`).
-[a.c](%%REPO_URL%%/2013/hou/a.c) compiles mostly clean in the C99/ANSI modes of clang and gcc (with:
+`a.c` compiles mostly clean in the C99/ANSI modes of clang and gcc (with:
 
 ```
 -Wall --pedantic
@@ -178,15 +180,15 @@ internal states.
 the code, but they leave the text clear in the *result*. This entry takes it
 further and obfuscates the output image as well. Can you find the text in the
 image? Hint: look up.
-* [a.c](%%REPO_URL%%/2013/hou/a.c) leaves all shaders in plain text, but the plain text shader code can't
+* `a.c` leaves all shaders in plain text, but the plain text shader code can't
 be taken for its face value; the arithmetic rules subtly diverge from our common
 sense.
-* [a.c](%%REPO_URL%%/2013/hou/a.c) is less portable than [hou.c](%%REPO_URL%%/2013/hou/hou.c) itself. [hou.c](%%REPO_URL%%/2013/hou/hou.c) only depends
+* `a.c` is less portable than [hou.c](%%REPO_URL%%/2013/hou/hou.c) itself. [hou.c](%%REPO_URL%%/2013/hou/hou.c) only depends
 on ASCII and should run just fine on 16-bit, small memory, or
-floating-point-incapable machines. [a.c](%%REPO_URL%%/2013/hou/a.c), while still reasonably portable, is
+floating-point-incapable machines. `a.c`, while still reasonably portable, is
 quite memory consuming, requires IEEE754-compliant `double`, and assumes `int` to be
 32-bits.
-* Though technically endian-dependent, [a.c](%%REPO_URL%%/2013/hou/a.c) remains portable providing that one
+* Though technically endian-dependent, `a.c` remains portable providing that one
 doesn't copy saved sessions across different endianness.
 
 

2013/hou/index.html

@@ -431,12 +431,12 @@ really just a decompressor to generate the real source code of the
 program.</p>
 <p>This program will loop infinitely while progressively refining a
 <a href="https://en.wikipedia.org/wiki/Ray_tracing_(graphics)">raytraced</a> image.</p>
-<p>NOTE: the author refers to <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/hou/a.c">a.c</a>, placed in a gzipped file <code>a.c.gz</code>. We do not
+<p>NOTE: the author refers to <code>a.c</code>, placed in a gzipped file <code>a.c.gz</code>. We do not
 include it but it can be generated like:</p>
-<pre><code>    cc -Wall hou.c -o hou -lm
+<pre><code>    make a.c</code></pre>
-    ./hou &gt; a.c</code></pre>
+<p>There is no longer a need to do this as the Makefile takes care of it without
-<p>but there is no need to do this as the Makefile takes care of it without even
+even needing to create a temporary file but as the author refers to it and its
-needing to create a temporary file.</p>
+uses it can still be generated to follow along.</p>
 <h2 id="authors-remarks">Author’s remarks:</h2>
 <h3 id="using-hou">Using hou</h3>
 <p>This program is a programmable rendering engine with a built-in default scene.
@@ -497,15 +497,15 @@ restrictions</a> section below for more details.</li>
 <li>Neither <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/hou/hou.c">hou.c</a> nor <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/hou/a.c">a.c</a> (the <em>real</em> decompressed source) uses
 <code>#define</code> (or <code>cc -D</code>) at all.</li>
 <li>The source code is not required at runtime.</li>
-<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/hou/a.c">a.c</a> does not drop optional features to reduce size. There are pure
+<li><code>a.c</code> does not drop optional features to reduce size. There are pure
 optimization code that can be dropped without affecting the converged output
 (only affecting the ray tracing speed / convergence rate). All files are
 properly <code>fopen()</code>ed with <code>"rb"</code> / <code>"wb"</code> for Windows compatibility. The PPM
 header has a comment line for non-standard-compliant viewers (specifically, my
 old HDRShop 1.0). And there is a nice text message saying “please wait…”.
-Despite the messy look, <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/hou/a.c">a.c</a> and <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/hou/hou.c">hou.c</a> compile warning-free
+Despite the messy look, <code>a.c</code> and <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/hou/hou.c">hou.c</a> compile warning-free
 (<a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/hou/hou.c">hou.c</a> even wastes 18 bytes on <code>#include&lt;stdio.h&gt;</code> just for <code>putchar(3)</code>).
-<a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/hou/a.c">a.c</a> compiles mostly clean in the C99/ANSI modes of clang and gcc (with:</li>
+<code>a.c</code> compiles mostly clean in the C99/ANSI modes of clang and gcc (with:</li>
 </ul>
 <pre><code>-Wall --pedantic</code></pre>
 <p>The only warning generated is a pedantic one: <code>"string constant too long"</code>.</p>
@@ -521,15 +521,15 @@ internal states.</li>
 the code, but they leave the text clear in the <em>result</em>. This entry takes it
 further and obfuscates the output image as well. Can you find the text in the
 image? Hint: look up.</li>
-<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/hou/a.c">a.c</a> leaves all shaders in plain text, but the plain text shader code can’t
+<li><code>a.c</code> leaves all shaders in plain text, but the plain text shader code can’t
 be taken for its face value; the arithmetic rules subtly diverge from our common
 sense.</li>
-<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/hou/a.c">a.c</a> is less portable than <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/hou/hou.c">hou.c</a> itself. <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/hou/hou.c">hou.c</a> only depends
+<li><code>a.c</code> is less portable than <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/hou/hou.c">hou.c</a> itself. <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/hou/hou.c">hou.c</a> only depends
 on ASCII and should run just fine on 16-bit, small memory, or
-floating-point-incapable machines. <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/hou/a.c">a.c</a>, while still reasonably portable, is
+floating-point-incapable machines. <code>a.c</code>, while still reasonably portable, is
 quite memory consuming, requires IEEE754-compliant <code>double</code>, and assumes <code>int</code> to be
 32-bits.</li>
-<li>Though technically endian-dependent, <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2013/hou/a.c">a.c</a> remains portable providing that one
+<li>Though technically endian-dependent, <code>a.c</code> remains portable providing that one
 doesn’t copy saved sessions across different endianness.</li>
 </ul>
 <h3 id="spoiler">Spoiler</h3>