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Merge pull request #2761 from xexyl/try-makefile-fixes

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Fixes for recent commits
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Landon Curt Noll authored and GitHub committed 2024-12-05 11:34:44 -08:00
2 parents c8109a6f8f 2f4fe82068
commit 8fd163b70d
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faq.html
+20 -12
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@@ -892,10 +892,15 @@ this is not clear!</li>
</div> </div>
<p>If your submission has more than one use, or if you have interesting ways to <p>If your submission has more than one use, or if you have interesting ways to
invoke your program, perhaps using other commonly installed tools (or tools invoke your program, perhaps using other commonly installed tools (or tools
included in your submission), it can be helpful to include a <code>try.sh</code> script.</p> included in your submission), it can be helpful to include a <code>try.sh</code> script:</p>
<p>A <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/next/try.sh">template try.sh</a> can be used as a <ul>
starting point, or you can look at some of the others in the website, to get <li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/next/try.sh">view example try.sh</a></li>
some ideas.</p> <li><a href="next/try.sh">download example try.sh</a></li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/next/try.alt.sh">view example try.alt.sh</a></li>
<li><a href="next/try.alt.sh">download example try.alt.sh</a></li>
</ul>
<p>The template <code>try.sh</code> script can be used as a starting point, or you can look at
some of the others in the website, to get some ideas.</p>
<p>It is not detrimental to your chances of winning if you do not include one as <p>It is not detrimental to your chances of winning if you do not include one as
not all submissions can make use of them. Nevertheless, it is helpful to include not all submissions can make use of them. Nevertheless, it is helpful to include
ways to use your program, and if you have creative ways this can be a bonus. It ways to use your program, and if you have creative ways this can be a bonus. It
@@ -903,7 +908,7 @@ does not mean that a program that cannot be used with other programs is less
interesting or less likely to win, but we do enjoy interesting and creative uses interesting or less likely to win, but we do enjoy interesting and creative uses
of submissions.</p> of submissions.</p>
<p>If you have alternate code that you are including, then you can use the <p>If you have alternate code that you are including, then you can use the
<a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/next/try.alt.sh">try.alt.sh template</a> instead.</p> <a href="next/try.alt.sh">try.alt.sh template</a> instead.</p>
<p>We recommend that you include the use of these scripts in the <code>try</code> rule in the <p>We recommend that you include the use of these scripts in the <code>try</code> rule in the
example Makefile that you modify for your submission. See the example Makefile that you modify for your submission. See the
FAQ on “<a href="#makefile">submission Makefiles</a>.</p> FAQ on “<a href="#makefile">submission Makefiles</a>.</p>
@@ -1086,10 +1091,11 @@ discussion</a>.</p>
<p>There are unfortunately some warnings that cannot be disabled; they are always <p>There are unfortunately some warnings that cannot be disabled; they are always
enabled whatever warning options you have enabled. Also, there is a warning that enabled whatever warning options you have enabled. Also, there is a warning that
is enabled whenever you act on <code>char *</code>s, saying it is unsafe buffer usage, even is enabled whenever you act on <code>char *</code>s, saying it is unsafe buffer usage, even
when it’s not (this might be enabled by <code>-Weverything</code> but it might not be; for when it’s not. This might be enabled by <code>-Weverything</code> but it might not be; for
more details on why we use <code>-Weverything</code> in Clang see the FAQ on more details on why we use <code>-Weverything</code> in Clang see the
“<a href="#weverything"><code>-Weverything</code></a>”), and it is not detrimental to your submission FAQ on “<a href="#weverything">-Weverything</a>”.</p>
if you disable this. This warning happens to be <code>-Wno-unsafe-buffer-usage</code>.</p> <p>It is not detrimental to your submission if you disable this, which you can do
by specifying <code>-Wno-unsafe-buffer-usage</code>.</p>
<p>So in short, no you should not worry about these as they are sometimes <p>So in short, no you should not worry about these as they are sometimes
inevitable in obfuscated code and even non-obfuscated code.</p> inevitable in obfuscated code and even non-obfuscated code.</p>
<p>If you <em>can</em> work past this it might be good but this is not something that <p>If you <em>can</em> work past this it might be good but this is not something that
@@ -3066,7 +3072,7 @@ extension <code>.md</code>.</p></li>
<code>"winner.alt.c"</code> or <code>"prog.alt.c"</code>; this is also what the <code>file_path</code> will be. <code>"winner.alt.c"</code> or <code>"prog.alt.c"</code>; this is also what the <code>file_path</code> will be.
The <code>entry_text</code> will typically (not always but almost always) be <code>"alternate source code"</code>.</p> The <code>entry_text</code> will typically (not always but almost always) be <code>"alternate source code"</code>.</p>
<p>Many entries have a script (or scripts) for the <code>Try</code> section in their index.html file. <p>Many entries have a script (or scripts) for the <code>Try</code> section in their index.html file.
Usually this is called <code>try.sh</code> for the entry and <code>try.alt.sh</code> for the alternate Usually this is called <code>try.sh</code> for the winning entry and <code>try.alt.sh</code> for the alternate
source code (if there is an alternate version). Some, however, have another file source code (if there is an alternate version). Some, however, have another file
name. The <code>entry_text</code> for the <code>try</code> scripts will be <code>script to try entry</code> or name. The <code>entry_text</code> for the <code>try</code> scripts will be <code>script to try entry</code> or
something along those lines.</p> something along those lines.</p>
@@ -3086,7 +3092,7 @@ repo</a>
contains information about how to find and compile the mkiocccentry contains information about how to find and compile the mkiocccentry
toolkit, which includes the IOCCC version of the <code>jparse(1)</code> tool, located toolkit, which includes the IOCCC version of the <code>jparse(1)</code> tool, located
under the <code>mkiocccentry</code> directory as <code>jparse/jparse</code>.</p> under the <code>mkiocccentry</code> directory as <code>jparse/jparse</code>.</p>
<p>Additionally you may install the <code>jparse(1)</code> tool from the <a href="https://github.com/xexyl/jparse">jparse <p>Additionally you may install the <code>jparse(1)</code> tool from the <a href="https://github.com/ioccc-src/mkiocccentry">mkiocccentry
repo</a>:</p> repo</a>:</p>
<pre class="&lt;!--sh--&gt;"><code> git clone https://github.com/ioccc-src/mkiocccentry.git <pre class="&lt;!--sh--&gt;"><code> git clone https://github.com/ioccc-src/mkiocccentry.git
cd mkiocccentry &amp;&amp; make clobber all&quot; 1&gt;&amp;2 cd mkiocccentry &amp;&amp; make clobber all&quot; 1&gt;&amp;2
@@ -3102,7 +3108,9 @@ verbosity with the <code>-v</code> option. For instance:</p>
the tool.</p> the tool.</p>
<p><strong>NOTE</strong>: the <code>jparse</code> subdirectory is a clone of the official <a href="https://github.com/xexyl/jparse/issues">jparse <p><strong>NOTE</strong>: the <code>jparse</code> subdirectory is a clone of the official <a href="https://github.com/xexyl/jparse/issues">jparse
repo</a> but we recommend you compile and repo</a> but we recommend you compile and
install via the <code>mkiocccentry</code> repo because it has the dependencies built in.</p> install via the <code>mkiocccentry</code> repo because it has the dependencies built in,
and because the <code>mkiocccentry</code> copy is that which is used by the current IOCCC,
as the two can be different at times.</p>
<p>Jump to: <a href="#">top</a></p> <p>Jump to: <a href="#">top</a></p>
<hr style="width:50%;text-align:left;margin-left:0"> <hr style="width:50%;text-align:left;margin-left:0">
<hr style="width:50%;text-align:left;margin-left:0"> <hr style="width:50%;text-align:left;margin-left:0">
faq.md
+22 -13
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@@ -578,11 +578,16 @@ Jump to: [top](#)
If your submission has more than one use, or if you have interesting ways to If your submission has more than one use, or if you have interesting ways to
invoke your program, perhaps using other commonly installed tools (or tools invoke your program, perhaps using other commonly installed tools (or tools
included in your submission), it can be helpful to include a `try.sh` script. included in your submission), it can be helpful to include a `try.sh` script:
A [template try.sh](%%REPO_URL%%/next/try.sh) can be used as a - [view example try.sh](%%REPO_URL%%/next/try.sh)
starting point, or you can look at some of the others in the website, to get - [download example try.sh](next/try.sh)
some ideas. - [view example try.alt.sh](%%REPO_URL%%/next/try.alt.sh)
- [download example try.alt.sh](next/try.alt.sh)
The template `try.sh` script can be used as a starting point, or you can look at
some of the others in the website, to get some ideas.
It is not detrimental to your chances of winning if you do not include one as It is not detrimental to your chances of winning if you do not include one as
not all submissions can make use of them. Nevertheless, it is helpful to include not all submissions can make use of them. Nevertheless, it is helpful to include
@@ -592,7 +597,7 @@ interesting or less likely to win, but we do enjoy interesting and creative uses
of submissions. of submissions.
If you have alternate code that you are including, then you can use the If you have alternate code that you are including, then you can use the
[try.alt.sh template](%%REPO_URL%%/next/try.alt.sh) instead. [try.alt.sh template](next/try.alt.sh) instead.
We recommend that you include the use of these scripts in the `try` rule in the We recommend that you include the use of these scripts in the `try` rule in the
example Makefile that you modify for your submission. See the example Makefile that you modify for your submission. See the
@@ -844,10 +849,12 @@ Jump to: [top](#)
There are unfortunately some warnings that cannot be disabled; they are always There are unfortunately some warnings that cannot be disabled; they are always
enabled whatever warning options you have enabled. Also, there is a warning that enabled whatever warning options you have enabled. Also, there is a warning that
is enabled whenever you act on `char *`s, saying it is unsafe buffer usage, even is enabled whenever you act on `char *`s, saying it is unsafe buffer usage, even
when it's not (this might be enabled by `-Weverything` but it might not be; for when it's not. This might be enabled by `-Weverything` but it might not be; for
more details on why we use `-Weverything` in Clang see the FAQ on more details on why we use `-Weverything` in Clang see the
"[`-Weverything`](#weverything)"), and it is not detrimental to your submission FAQ on "[-Weverything](#weverything)".
if you disable this. This warning happens to be `-Wno-unsafe-buffer-usage`.
It is not detrimental to your submission if you disable this, which you can do
by specifying `-Wno-unsafe-buffer-usage`.
So in short, no you should not worry about these as they are sometimes So in short, no you should not worry about these as they are sometimes
inevitable in obfuscated code and even non-obfuscated code. inevitable in obfuscated code and even non-obfuscated code.
@@ -3280,7 +3287,7 @@ The `entry_text` will typically (not always but almost always) be `"alternate
source code"`. source code"`.
Many entries have a script (or scripts) for the `Try` section in their index.html file. Many entries have a script (or scripts) for the `Try` section in their index.html file.
Usually this is called `try.sh` for the entry and `try.alt.sh` for the alternate Usually this is called `try.sh` for the winning entry and `try.alt.sh` for the alternate
source code (if there is an alternate version). Some, however, have another file source code (if there is an alternate version). Some, however, have another file
name. The `entry_text` for the `try` scripts will be `script to try entry` or name. The `entry_text` for the `try` scripts will be `script to try entry` or
something along those lines. something along those lines.
@@ -3306,8 +3313,8 @@ contains information about how to find and compile the mkiocccentry
toolkit, which includes the IOCCC version of the `jparse(1)` tool, located toolkit, which includes the IOCCC version of the `jparse(1)` tool, located
under the `mkiocccentry` directory as `jparse/jparse`. under the `mkiocccentry` directory as `jparse/jparse`.
Additionally you may install the `jparse(1)` tool from the [jparse Additionally you may install the `jparse(1)` tool from the [mkiocccentry
repo](https://github.com/xexyl/jparse): repo](https://github.com/ioccc-src/mkiocccentry):
``` <!--sh--> ``` <!--sh-->
git clone https://github.com/ioccc-src/mkiocccentry.git git clone https://github.com/ioccc-src/mkiocccentry.git
@@ -3337,7 +3344,9 @@ the tool.
**NOTE**: the `jparse` subdirectory is a clone of the official [jparse **NOTE**: the `jparse` subdirectory is a clone of the official [jparse
repo](https://github.com/xexyl/jparse/issues) but we recommend you compile and repo](https://github.com/xexyl/jparse/issues) but we recommend you compile and
install via the `mkiocccentry` repo because it has the dependencies built in. install via the `mkiocccentry` repo because it has the dependencies built in,
and because the `mkiocccentry` copy is that which is used by the current IOCCC,
as the two can be different at times.
Jump to: [top](#) Jump to: [top](#)
next/Makefile.example
+26
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@@ -130,6 +130,16 @@ endif
PROG= prog PROG= prog
OBJ= ${PROG}.o OBJ= ${PROG}.o
TARGET= ${PROG} TARGET= ${PROG}
# If you have alternate code, try something like:
# ALT_OBJ= ${PROG}.alt.o
# ALT_TARGET= ${PROG}.alt
#
# or so.
#
# Please remove these lines either way.
#
ALT_OBJ=
ALT_TARGET=
# list any data files supplied with the submission # list any data files supplied with the submission
# #
@@ -150,11 +160,27 @@ all: data ${TARGET}
${PROG}: ${PROG}.c ${PROG}: ${PROG}.c
${CC} ${CFLAGS} $< -o $@ ${LDFLAGS} ${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
# alternative executable
#
alt: data ${ALT_TARGET}
@${TRUE}
${PROG}.alt: ${PROG}.alt.c
${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
# data files # data files
# #
data: ${DATA} data: ${DATA}
@${TRUE} @${TRUE}
# both all and alt
#
everything: all alt
@${TRUE}
# one suggested way to run the program # one suggested way to run the program
# #
try: ${PROG} ${DATA} try: ${PROG} ${DATA}
next/guidelines.html
+147 -57
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@@ -465,7 +465,7 @@ writing by <a href="../contact.html">contacting the judges</a>.</p>
</div> </div>
</div> </div>
<p class="leftbar"> <p class="leftbar">
These <a href="guidelines.html">IOCCC guidelines</a> are version <strong>28.24 2024-12-02</strong>. These <a href="guidelines.html">IOCCC guidelines</a> are version <strong>28.25 2024-12-05</strong>.
</p> </p>
<p><strong>IMPORTANT</strong>: Be <strong>SURE</strong> to read the <a href="rules.html">IOCCC rules</a>.</p> <p><strong>IMPORTANT</strong>: Be <strong>SURE</strong> to read the <a href="rules.html">IOCCC rules</a>.</p>
<p>Jump to: <a href="#">top</a></p> <p>Jump to: <a href="#">top</a></p>
@@ -535,8 +535,10 @@ The <a href="rules.html#rule2b">Rule 2b</a> size has <strong>increased from 2053
bytes. bytes.
</p> </p>
<p class="leftbar"> <p class="leftbar">
The new default way to compile submissions: <code>-std=gnu17 -O3 -g3 -Wall -Wextra -pedantic</code>. See below for more details about the example Makefile The new default way to compile submissions: <code>-std=gnu17 -O3 -g3 -Wall -Wextra -pedantic</code>.
for more help. You <strong>are encouraged</strong> to use the example Makefile here, rather than the
<code>mkiocccentry</code> repo. For details and help, see below in the <a href="#makefile">Makefile
section</a>.
</p> </p>
<p class="leftbar"> <p class="leftbar">
Submissions are in the form of a single xz compressed tarball. Submissions are in the form of a single xz compressed tarball.
@@ -551,11 +553,6 @@ repo</a>.
to account for the new <a href="https://github.com/ioccc-src/mkiocccentry">mkiocccentry repo</a> tools. to account for the new <a href="https://github.com/ioccc-src/mkiocccentry">mkiocccentry repo</a> tools.
</p> </p>
<p class="leftbar"> <p class="leftbar">
You <strong>are encouraged</strong> to use <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/next/Makefile.example">this
Makefile.example</a>,
rather than the one at the <code>mkiocccentry</code> repo.
</p>
<p class="leftbar">
The IOCCC submission URL, <a href="../status.html#open">when the IOCCC is open</a>, is The IOCCC submission URL, <a href="../status.html#open">when the IOCCC is open</a>, is
<a href="https://submit.ioccc.org/">submit.ioccc.org</a>. <a href="https://submit.ioccc.org/">submit.ioccc.org</a>.
</p> </p>
@@ -787,27 +784,40 @@ jparse</a>, for more
details. details.
</p> </p>
<p class="leftbar"> <p class="leftbar">
The original <code>jparse</code> code, co-developed by Landon and Cody Boone Ferguson in The original <code>jparse</code> code, co-developed by
<a href="http://www.isthe.com/chongo/index.html">Landon Curt Noll</a> and
<a href="../authors.html#Cody_Boone_Ferguson">Cody Boone Ferguson</a> in
2022, comes from the <a href="https://github.com/xexyl/jparse">jparse repo</a> <strong>but the 2022, comes from the <a href="https://github.com/xexyl/jparse">jparse repo</a> <strong>but the
mkiocccentry tools use a <em>clone</em></strong> of this repo <strong>at a <em>specific</em> release</strong>. mkiocccentry tools use a <em>clone</em></strong> of this repo <strong>at a <em>specific</em> release</strong>.
Thus the <code>mkiocccentry</code> will at times be behind the <code>jparse</code> repo! Thus the <code>mkiocccentry</code> will at times be behind the <code>jparse</code> repo!
</p> </p>
<p class="leftbar"> <p class="leftbar">
<p>You do <strong>NOT</strong> need to install <code>jparse</code>! The <code>mkiocccentry</code> tools link in the You do <strong>NOT need to install</strong> <code>jparse</code> from the <a href="https://github.com/xexyl/jparse">jparse
static library from the <code>mkiocccentry</code> clone! This also goes for the repo</a>! The <code>mkiocccentry</code> tools link in the
static library from the <code>mkiocccentry</code> clone. This also goes for the
<a href="https://github.com/lcn2/dbg">dbg</a> and <a href="https://github.com/lcn2/dbg">dbg</a> and
<a href="https://github.com/lcn2/dyn_array">dyn_array</a> libraries. In other words, <a href="https://github.com/lcn2/dyn_array">dyn_array</a> libraries that the tools use.
<code>mkiocccentry</code> contains <strong>everything</strong> you need.</p> </p>
<p class="leftbar">
In other words, <code>mkiocccentry</code> <strong>contains everything</strong> you need, and <em>even if you
do install</em> the libraries from their respective repos, it/they will <strong>not be
used</strong> when compiling the <code>mkiocccentry</code> tools.
</p>
<p>Jump to: <a href="#">top</a></p> <p>Jump to: <a href="#">top</a></p>
<h2 id="iocccsize"><code>iocccsize</code></h2> <h2 id="iocccsize"><code>iocccsize</code></h2>
<p class="leftbar"> <p class="leftbar">
<code>mkiocccentry(1)</code> will use code from <code>iocccsize(1)</code> which <code>mkiocccentry(1)</code> will use code from <code>iocccsize(1)</code> which
detects a number of issues that you may ignore, if you wish, as described above. detects a number of issues that you may ignore, if you wish, as described above.
As we already discussed how to invoke this we will not include it here again. As we already discussed how to invoke <code>mkiocccentry</code>, we will not include it
here again.
</p> </p>
<p class="leftbar"> <p class="leftbar">
This tool was originally part of a winning entry by Anthony C Howe, but with In other words, you no longer need to run <code>iocccsize</code> manually.
some modifications over time, as things have changed. </p>
<p class="leftbar">
The <code>iocccsize</code> tool was originally part of a winning entry by <a href="../authors.html#Anthony_C_Howe">Anthony C
Howe</a>, but with some modifications over time, as
things have changed.
</p> </p>
<p>Jump to: <a href="#">top</a></p> <p>Jump to: <a href="#">top</a></p>
<h2 id="chkentry"><code>chkentry</code></h2> <h2 id="chkentry"><code>chkentry</code></h2>
@@ -824,12 +834,18 @@ See the
FAQ on “<a href="../faq.html#mkiocccentry_bugs">reporting mkiocccentry bugs</a>”. FAQ on “<a href="../faq.html#mkiocccentry_bugs">reporting mkiocccentry bugs</a>”.
</p> </p>
<p class="leftbar"> <p class="leftbar">
Assuming that <code>chkentry(1)</code> validates both <code>.auth.json</code> and Assuming that <code>chkentry(1)</code> successfully validates both <code>.auth.json</code> and
<code>.info.json</code> then the tarball will be formed and then <code>txzchk(1)</code> will be <code>.info.json</code> then the tarball will be formed and then <code>txzchk(1)</code> will be
executed. In this case, there should be no problems as <code>mkiocccentry(1)</code> should executed. In this case, there should be no problems, as <code>mkiocccentry(1)</code> should
<strong>NOT</strong> form a tarball if there are any issues. <strong>NOT</strong> form a tarball if there are any issues.
</p> </p>
<p class="leftbar"> <p class="leftbar">
If <code>mkiocccentry(1)</code> is used and <code>chkentry(1)</code> fails to validate either of the
files, then unless it is a system specific problem, it is likely a bug in
<code>mkiocccentry(1)</code>, <code>chkentry(1)</code> or possibly <code>jparse</code>, though these are quite
unlikely.
</p>
<p class="leftbar">
Please see the Please see the
FAQ on “<a href="../faq.html#chkentry">validating .auth.json and/or .info.json files</a> FAQ on “<a href="../faq.html#chkentry">validating .auth.json and/or .info.json files</a>
for more details on this tool and how you can use it to validate your for more details on this tool and how you can use it to validate your
@@ -918,7 +934,7 @@ FAQ on “<a href="../faq.html#mkiocccentry_bugs">report mkiocccentry bugs</a>
As you can see, the use of <code>mkiocccentry(1)</code> is <strong>HIGHLY RECOMMENDED</strong>. As you can see, the use of <code>mkiocccentry(1)</code> is <strong>HIGHLY RECOMMENDED</strong>.
</p> </p>
<div id="bugs"> <div id="bugs">
<h1 id="problemsbugs-in-tools">Problems/bugs in tools</h1> <h1 id="problems-andor-bugs-in-tools">Problems and/or bugs in tools</h1>
</div> </div>
<p class="leftbar"> <p class="leftbar">
Although the tools have been tested quite a bit, and although it is quite Although the tools have been tested quite a bit, and although it is quite
@@ -936,42 +952,88 @@ bug; it is a judgement call; if it’s a bug it’ll be addressed and if it’s
that’s OK too! that’s OK too!
</p> </p>
<div id="make"> <div id="make">
<div id="makefile">
<h1 id="makefiles">Makefiles</h1> <h1 id="makefiles">Makefiles</h1>
</div> </div>
</div>
<p class="leftbar"> <p class="leftbar">
<p>We <strong>recommend</strong> that you use the <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/next/Makefile.example">example We <strong>recommend</strong> AND <strong>encourage</strong> you to use the example Makefile <strong>here</strong>,
Makefile</a>, rather than the <code>mkiocccentry</code> repo’s <code>Makefile.example</code>, renamed as <code>Makefile</code>
renamed as <code>Makefile</code> of course, as the starting point for your submission’s of course, as the starting point for your submission’s required <code>Makefile</code>:
required <code>Makefile</code>. Feel free to modify the <code>Makefile</code> to suit your obfuscated </p>
needs.</p> <ul>
<li><p class="leftbar">
<a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/next/Makefile.example">view example
Makefile</a>
</p></li>
<li><p class="leftbar">
<a href="Makefile.example"
download="Makefile">download example Makefile</a>
</p></li>
</ul>
<p class="leftbar"> <p class="leftbar">
The rest of this section will assume that you are using some variant of the Feel free to modify the <code>Makefile</code> to suit your obfuscated
<a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/next/Makefile.example">example Makefile</a>, needs.
renamed as <code>Makefile</code> of course. </p>
<p class="leftbar">
The rest of this section and its subsections will assume that you are using some
variant of the example <code>Makefile</code>, again renamed as <code>Makefile</code>.
</p> </p>
<p class="leftbar"> <p class="leftbar">
We suggest that you compile your submission with a commonly available We suggest that you compile your submission with a commonly available
<code>-std=gnu17</code> (ISO C 2017 with GNU extensions) C compiler. <code>-std=gnu17</code> (ISO C 2017 with GNU extensions) C compiler.
</p> </p>
<div id="flags">
<h2 id="default-compiler-flags">Default compiler flags</h2>
</div>
<p class="leftbar"> <p class="leftbar">
Unless you <strong>clearly state</strong> otherwise in your <code>remarks.md</code> file <strong>AND</strong> put in your Unless you <strong>clearly state</strong> otherwise in your <code>remarks.md</code> file <strong>AND</strong> put in your
submission’s <code>Makefile</code>, we <strong>will</strong> compile using <code>-std=gnu17 -O3 -g3</code>. submission’s <code>Makefile</code>, we <strong>will</strong> compile using <code>-std=gnu17 -O3 -g3</code>!
</p> </p>
<p class="leftbar"> <p class="leftbar">
It is <strong>OK</strong> to require your submission to not be compiled It <strong>is OK</strong> if you need to require your submission to <strong>not be</strong> compiled
using the default <code>-std=gnu17 -O3 -g3</code> settings. Simply <strong>explain why</strong> using the default <code>-std=gnu17 -O3 -g3</code> settings. Simply <strong>explain why</strong>
your submission should not be compiled using <code>-std=gnu17 -O3 -g3</code> in your submission should not be compiled using <code>-std=gnu17 -O3 -g3</code> in
your <code>remarks.md</code> file and adjust your <code>Makefile</code> accordingly. your <code>remarks.md</code> file <strong>and</strong> adjust your <code>Makefile</code> accordingly.
</p> </p>
<p class="leftbar"> <p class="leftbar">
An example reason is that the optimiser is known to break some programs, but
there are certainly other possible valid reasons. Again, just update the
<code>Makefile</code> and explain it in your <code>remarks.md</code>.
</p>
<div id="compilers">
<h2 id="default-compiler">Default compiler</h2>
</div>
<p class="leftbar">
<strong>IMPORTANT NOTE</strong>: The use of <code>-std=gnu17</code> does <strong>NOT</strong> imply the use of the <code>gcc</code> <strong>IMPORTANT NOTE</strong>: The use of <code>-std=gnu17</code> does <strong>NOT</strong> imply the use of the <code>gcc</code>
compiler! We often start by compiling using the <strong>clang</strong> C compiler instead. compiler! We often start by compiling using the <strong>clang</strong> C compiler instead.
</p> </p>
<p class="leftbar"> <p class="leftbar">
<strong>PLEASE NOTE</strong>: in macOS, the compiler <code>gcc</code> found at <code>/usr/bin/gcc</code> is
in truth the <code>clang</code> compiler, as <code>/usr/bin/gcc --version</code> will show!
</p>
<div id="cstd">
<div id="standard">
<h2 id="c-standard">C standard</h2>
</div>
</div>
<p class="leftbar">
You may change the standard under which your submission is compiled You may change the standard under which your submission is compiled
by modifying the <code>CSTD</code> Makefile variable. For example, to use <code>c17</code> instead: by modifying the <code>CSTD</code> Makefile variable. For example, to use <code>c17</code> instead:
</p> </p>
<pre><code> CSTD= -std=c17</code></pre> <pre><code> CSTD= -std=c17</code></pre>
<div id="opt">
<h2 id="default-optimisation-level">Default optimisation level</h2>
</div>
<p class="leftbar">
You may change the level of optimization and compiler debug level
that your submission is compiled with, by modifying the <code>OPT</code> Makefile variable.
For example, to compile without optimization and with debug symbols:
</p>
<pre><code> OPT= -O0 -g3</code></pre>
<div id="warnings">
<h2 id="compiler-warnings">Compiler warnings</h2>
</div>
<p class="leftbar"> <p class="leftbar">
For compilers, such as <code>clang</code>, that have the <code>-Weverything</code> option, For compilers, such as <code>clang</code>, that have the <code>-Weverything</code> option,
while you may wish to try it, you should read our while you may wish to try it, you should read our
@@ -982,11 +1044,11 @@ cited there. This goes even if your version does not trigger a warning as some
other version might! other version might!
</p> </p>
<p class="leftbar"> <p class="leftbar">
You may change the level of optimization and compiler debug level On the other hand, if <code>${CC}</code> has “<code>clang</code>” in the name, the example <code>Makefile</code> will
that your submission is compiled with, by modifying the <code>OPT</code> Makefile variable. automatically enable <code>-Weverything</code>, so you might have to use <code>-Wno-foo</code>
For example, to compile without optimization and debug symbols: options, as detailed below.
</p> </p>
<pre><code> OPT= -O0 -g3</code></pre> <h2 id="disabling-warnings">Disabling warnings</h2>
<p class="leftbar"> <p class="leftbar">
There is no real penalty for compiler warnings. Sometimes There is no real penalty for compiler warnings. Sometimes
compiler warnings cannot be helped: especially in the case of compiler warnings cannot be helped: especially in the case of
@@ -999,7 +1061,7 @@ more strict <code>-Wall -Wextra -pedantic</code> mode:
</p> </p>
<pre><code> CWARN= -Wall -Wextra -pedantic</code></pre> <pre><code> CWARN= -Wall -Wextra -pedantic</code></pre>
<p class="leftbar"> <p class="leftbar">
The two previous guidelines may be thought by some as being somewhat The two previous guidelines might be thought by some as being somewhat
contradictory. Isn’t life, and isn’t trying to satisfy “contradictory customer contradictory. Isn’t life, and isn’t trying to satisfy “contradictory customer
requirements” all too often like that? :-) Try to minimize warnings if you requirements” all too often like that? :-) Try to minimize warnings if you
can. can.
@@ -1019,13 +1081,18 @@ obfuscated code and even in some non-obfuscated code, and you should not worry
about this, though it might be worth pointing out (see below for an example). about this, though it might be worth pointing out (see below for an example).
</p> </p>
<p class="leftbar"> <p class="leftbar">
Additionally: some compilers like to warn about certain use of <code>char *</code>s which Some compilers like to warn about certain use of <code>char *</code>s which
is not only dubious itself, but it obviously can’t (always) be avoided, so you might not only be dubious itself, but it obviously can’t (always) be avoided, so you
should not worry about this either; this is the warning should not worry about this either; this is the warning
<code>-Wno-unsafe-buffer-usage</code>. See also the <code>-Wunsafe-buffer-usage</code> and the way to disable it is <code>-Wno-unsafe-buffer-usage</code>. See also the
FAQ on “<a href="../faq.html#forced_warnings">forced warnings</a>” FAQ on “<a href="../faq.html#forced_warnings">forced warnings</a>”
and the and the
FAQ on “<a href="../faq.html#weverything"><code>-Weverything</code></a>”. FAQ on “<a href="../faq.html#weverything">-Weverything</a>”.
</p>
<p class="leftbar">
If you do have to disable warnings due to <code>-Weverything</code> automatically being
included, you might wish to state this fact. :-)
And even without <code>-Weverything</code> there can be warnings, as noted above.
</p> </p>
<p class="leftbar"> <p class="leftbar">
If your submission issues lots of warnings but is otherwise If your submission issues lots of warnings but is otherwise
@@ -1036,10 +1103,6 @@ produce a compiler <strong>error</strong> and refuse to compile your code: unles
reason that is what you intend to happen in which case document that too in your reason that is what you intend to happen in which case document that too in your
<code>remarks.md</code> file. :-) <code>remarks.md</code> file. :-)
</p> </p>
<p class="leftbar">
<strong>PLEASE NOTE</strong>: in macOS, the compiler <code>gcc</code> found at <code>/usr/bin/gcc</code> is
in truth the <code>clang</code> compiler, as <code>/usr/bin/gcc --version</code> will show!
</p>
<p>All other things being equal, a program that must turn off fewer <p>All other things being equal, a program that must turn off fewer
warnings will be considered better, for certain values of better.</p> warnings will be considered better, for certain values of better.</p>
<p class="leftbar"> <p class="leftbar">
@@ -1059,16 +1122,25 @@ Some compilers have reported this as an error, however, and if you have
such a compiler you might want to not add it, or at least note in your such a compiler you might want to not add it, or at least note in your
<code>remarks.md</code> the OS, OS version and compiler that this shows up. <code>remarks.md</code> the OS, OS version and compiler that this shows up.
</p> </p>
<div id="macros">
<h2 id="defining-macros-in-the-makefile">Defining macros in the Makefile</h2>
</div>
<p class="leftbar"> <p class="leftbar">
If you need to define something on the compile line, use If you need to define something on the compile line, use
the <code>CDEFINE</code> Makefile variable. For example: the <code>CDEFINE</code> Makefile variable. For example:
</p> </p>
<pre><code> CDEFINE= -Dfoo -Dbar=baz</code></pre> <pre><code> CDEFINE= -Dfoo -Dbar=baz</code></pre>
<div id="include">
<h2 id="include-files-in-the-makefile">Include files in the Makefile</h2>
</div>
<p class="leftbar"> <p class="leftbar">
If you need to include a file on the command line, use If you need to include a file (as in <code>#include</code>) on the command line, use the
the <code>CINCLUDE</code> Makefile variable. For example: <code>CINCLUDE</code> Makefile variable. For example:
</p> </p>
<pre><code> CINCLUDE= -include stdio.h</code></pre> <pre><code> CINCLUDE= -include stdio.h</code></pre>
<div id="magic">
<h2 id="magic-in-the-makefile">Magic in the Makefile</h2>
</div>
<p class="leftbar"> <p class="leftbar">
If you need to add other “<strong>magic</strong>” flags to your compile line, If you need to add other “<strong>magic</strong>” flags to your compile line,
use the <code>COTHER</code> Makefile variable. For example: use the <code>COTHER</code> Makefile variable. For example:
@@ -1089,24 +1161,41 @@ Again, please note that in macOS, <code>/usr/bin/gcc</code> is actually <code>cl
</div> </div>
<p class="leftbar"> <p class="leftbar">
We <strong>LIKE</strong> submissions that use an edited variant of the We <strong>LIKE</strong> submissions that use an edited variant of the
<a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/next/Makefile.example">example Makefile</a>, example Makefile, as described in the <a href="#makefile">Makefile section</a>,
renamed as <code>Makefile</code> of course. This makes it easier for the <a href="../judges.html">IOCCC Judges</a> renamed as <code>Makefile</code> of course. This makes it easier for the <a href="../judges.html">IOCCC Judges</a>
to test your submission. And if your submissions wins, it makes it easier to integrate it into to test your submission. And if your submissions wins, it makes it easier to integrate it into
the <a href="https://www.ioccc.org/index.html">Official IOCCC winner website</a>. the <a href="https://www.ioccc.org/index.html">Official IOCCC winner website</a>.
</p> </p>
<p class="leftbar"> <p class="leftbar">
We <strong>LIKE</strong> submissions that use an edited version of the We <strong>LIKE</strong> submissions that use an edited version of the
<a href="try.sh">try.sh</a> example script (and if you have alternate code, <code>try.sh</code> example script (and if you have alternate code,
the same applies with the <a href="try.alt.sh">try.alt.sh</a> the same applies with the <code>try.alt.sh</code> script):
example script). Of course, it is quite possible that only one invocation is </p>
<ul>
<li><p class="leftbar">
<a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/next/try.sh">view example try.sh</a>
</p></li>
<li><p class="leftbar">
<a href="try.sh">download example try.sh</a>
</p></li>
<li><p class="leftbar">
<a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/next/try.alt.sh">view example try.alt.sh</a>
</p></li>
<li><p class="leftbar">
<a href="try.alt.sh">download example try.alt.sh</a>
</p></li>
</ul>
<p class="leftbar">
Of course, it is quite possible that only one invocation is
possible, so it is not necessarily detrimental to your submission if you do not possible, so it is not necessarily detrimental to your submission if you do not
include one, though we do like interesting and creative uses of submissions. See include one, though we do like interesting and creative uses of submissions. See
also the also the
FAQ on “<a href="../faq.html#try_scripts">submitting try.sh and try.alt.sh scripts</a>”.
</p> </p>
<p class="leftbar"> <p class="leftbar">
You might wish to add <code>./try.sh</code>, and if you have alternate code, You might wish to add <code>./try.sh</code> to the <code>try</code> rule in the Makefile you submit.
<code>./try.alt.sh</code>, to the <code>try</code> rule in the Makefile you submit. See also the If you have alternate code, then you could add a <code>try.alt</code> rule or something
FAQ on “<a href="../faq.html#try_scripts">submitting try.sh and try.alt.sh scripts</a>”. like that.
</p> </p>
<p>Doing masses of <code>#define</code>s to obscure the source has become ‘old’. We <p>Doing masses of <code>#define</code>s to obscure the source has become ‘old’. We
tend to ‘see thru’ masses of <code>#define</code>s due to our pre-processor tests tend to ‘see thru’ masses of <code>#define</code>s due to our pre-processor tests
@@ -1340,9 +1429,9 @@ they do not work as documented.</p>
is NOT the smallest C source file that when compiled and run, dumps core:</p> is NOT the smallest C source file that when compiled and run, dumps core:</p>
<pre><code> main;</code></pre> <pre><code> main;</code></pre>
<p class="leftbar"> <p class="leftbar">
Unless you specify <code>-fwritable-strings</code> (see <code>COTHER</code> in the <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/next/Makefile.example">example Unless you specify <code>-fwritable-strings</code> (see <code>COTHER</code> in the example
Makefile</a>) Makefile, described in the <a href="#makefile">Makefile section</a>), do not assume this
do not assume this sort of code will work: sort of code will work:
</p> </p>
<pre><code> char *T = &quot;So many primes, so little time!&quot;; <pre><code> char *T = &quot;So many primes, so little time!&quot;;
... ...
@@ -1563,8 +1652,9 @@ CPU, we might just try your submission on that emulator as well :-)
<p class="leftbar"> <p class="leftbar">
If your submission <strong>MUST</strong> run only on a 64-bit or 32-bit architecture, If your submission <strong>MUST</strong> run only on a 64-bit or 32-bit architecture,
then you <strong>MUST</strong> specify the <code>-arch</code> on your command line then you <strong>MUST</strong> specify the <code>-arch</code> on your command line
(see <code>ARCH</code> in the <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/next/Makefile.example">example (see <code>ARCH</code> in the example
Makefile</a>). Do not assume a processor word size without specifying <code>-arch</code>. For example: Makefile, described in <a href="#makefile">Makefile section</a>). Do not assume a
processor word size without specifying <code>-arch</code>. For example:
</p> </p>
<pre><code> ARCH= -m64</code></pre> <pre><code> ARCH= -m64</code></pre>
<p class="leftbar"> <p class="leftbar">
next/guidelines.md
+157 -61
View File
@@ -52,7 +52,7 @@ Jump to: [top](#)
</div> </div>
<p class="leftbar"> <p class="leftbar">
These [IOCCC guidelines](guidelines.html) are version **28.24 2024-12-02**. These [IOCCC guidelines](guidelines.html) are version **28.25 2024-12-05**.
</p> </p>
**IMPORTANT**: Be **SURE** to read the [IOCCC rules](rules.html). **IMPORTANT**: Be **SURE** to read the [IOCCC rules](rules.html).
@@ -140,8 +140,10 @@ bytes.
</p> </p>
<p class="leftbar">The new default way to compile submissions: `-std=gnu17 -O3 -g3 <p class="leftbar">The new default way to compile submissions: `-std=gnu17 -O3 -g3
-Wall -Wextra -pedantic`. See below for more details about the example Makefile -Wall -Wextra -pedantic`.
for more help. You **are encouraged** to use the example Makefile here, rather than the
`mkiocccentry` repo. For details and help, see below in the [Makefile
section](#makefile).
</p> </p>
<p class="leftbar"> <p class="leftbar">
@@ -159,12 +161,6 @@ repo](https://github.com/ioccc-src/mkiocccentry).
to account for the new [mkiocccentry repo](https://github.com/ioccc-src/mkiocccentry) tools. to account for the new [mkiocccentry repo](https://github.com/ioccc-src/mkiocccentry) tools.
</p> </p>
<p class="leftbar">
You **are encouraged** to use [this
Makefile.example](https://github.com/ioccc-src/temp-test-ioccc/blob/master/next/Makefile.example),
rather than the one at the `mkiocccentry` repo.
</p>
<p class="leftbar"> <p class="leftbar">
The IOCCC submission URL, [when the IOCCC is open](../status.html#open), is The IOCCC submission URL, [when the IOCCC is open](../status.html#open), is
[submit.ioccc.org](https://submit.ioccc.org/). [submit.ioccc.org](https://submit.ioccc.org/).
@@ -450,18 +446,27 @@ details.
</p> </p>
<p class="leftbar"> <p class="leftbar">
The original `jparse` code, co-developed by Landon and Cody Boone Ferguson in The original `jparse` code, co-developed by
[Landon Curt Noll](http://www.isthe.com/chongo/index.html) and
[Cody Boone Ferguson](../authors.html#Cody_Boone_Ferguson) in
2022, comes from the [jparse repo](https://github.com/xexyl/jparse) **but the 2022, comes from the [jparse repo](https://github.com/xexyl/jparse) **but the
mkiocccentry tools use a _clone_** of this repo **at a _specific_ release**. mkiocccentry tools use a _clone_** of this repo **at a _specific_ release**.
Thus the `mkiocccentry` will at times be behind the `jparse` repo! Thus the `mkiocccentry` will at times be behind the `jparse` repo!
</p> </p>
<p class="leftbar"> <p class="leftbar">
You do **NOT** need to install `jparse`! The `mkiocccentry` tools link in the You do **NOT need to install** `jparse` from the [jparse
static library from the `mkiocccentry` clone! This also goes for the repo](https://github.com/xexyl/jparse)! The `mkiocccentry` tools link in the
static library from the `mkiocccentry` clone. This also goes for the
[dbg](https://github.com/lcn2/dbg) and [dbg](https://github.com/lcn2/dbg) and
[dyn_array](https://github.com/lcn2/dyn_array) libraries. In other words, [dyn_array](https://github.com/lcn2/dyn_array) libraries that the tools use.
`mkiocccentry` contains **everything** you need. </p>
<p class="leftbar">
In other words, `mkiocccentry` **contains everything** you need, and _even if you
do install_ the libraries from their respective repos, it/they will **not be
used** when compiling the `mkiocccentry` tools.
</p>
Jump to: [top](#) Jump to: [top](#)
@@ -472,12 +477,18 @@ Jump to: [top](#)
<p class="leftbar">`mkiocccentry(1)` will use code from `iocccsize(1)` which <p class="leftbar">`mkiocccentry(1)` will use code from `iocccsize(1)` which
detects a number of issues that you may ignore, if you wish, as described above. detects a number of issues that you may ignore, if you wish, as described above.
As we already discussed how to invoke this we will not include it here again. As we already discussed how to invoke `mkiocccentry`, we will not include it
here again.
</p> </p>
<p class="leftbar"> <p class="leftbar">
This tool was originally part of a winning entry by Anthony C Howe, but with In other words, you no longer need to run `iocccsize` manually.
some modifications over time, as things have changed. </p>
<p class="leftbar">
The `iocccsize` tool was originally part of a winning entry by [Anthony C
Howe](../authors.html#Anthony_C_Howe), but with some modifications over time, as
things have changed.
</p> </p>
Jump to: [top](#) Jump to: [top](#)
@@ -500,12 +511,19 @@ FAQ on "[reporting mkiocccentry bugs](../faq.html#mkiocccentry_bugs)".
</p> </p>
<p class="leftbar"> <p class="leftbar">
Assuming that `chkentry(1)` validates both `.auth.json` and Assuming that `chkentry(1)` successfully validates both `.auth.json` and
`.info.json` then the tarball will be formed and then `txzchk(1)` will be `.info.json` then the tarball will be formed and then `txzchk(1)` will be
executed. In this case, there should be no problems as `mkiocccentry(1)` should executed. In this case, there should be no problems, as `mkiocccentry(1)` should
**NOT** form a tarball if there are any issues. **NOT** form a tarball if there are any issues.
</p> </p>
<p class="leftbar">
If `mkiocccentry(1)` is used and `chkentry(1)` fails to validate either of the
files, then unless it is a system specific problem, it is likely a bug in
`mkiocccentry(1)`, `chkentry(1)` or possibly `jparse`, though these are quite
unlikely.
</p>
<p class="leftbar"> <p class="leftbar">
Please see the Please see the
FAQ on "[validating .auth.json and/or .info.json files](../faq.html#chkentry) FAQ on "[validating .auth.json and/or .info.json files](../faq.html#chkentry)
@@ -620,7 +638,7 @@ As you can see, the use of `mkiocccentry(1)` is **HIGHLY RECOMMENDED**.
<div id="bugs"> <div id="bugs">
# Problems/bugs in tools # Problems and/or bugs in tools
</div> </div>
<p class="leftbar"> <p class="leftbar">
@@ -642,20 +660,30 @@ that's OK too!
<div id="make"> <div id="make">
<div id="makefile">
# Makefiles # Makefiles
</div> </div>
</div>
<p class="leftbar"> <p class="leftbar">
We **recommend** that you use the [example We **recommend** AND **encourage** you to use the example Makefile **here**,
Makefile](https://github.com/ioccc-src/temp-test-ioccc/blob/master/next/Makefile.example), rather than the `mkiocccentry` repo's `Makefile.example`, renamed as `Makefile`
renamed as `Makefile` of course, as the starting point for your submission's of course, as the starting point for your submission's required `Makefile`:
required `Makefile`. Feel free to modify the `Makefile` to suit your obfuscated </p>
needs.
- <p class="leftbar">[view example
Makefile](%%REPO_URL%%/next/Makefile.example)</p>
- <p class="leftbar"><a href="Makefile.example"
download="Makefile">download example Makefile</a></p>
<p class="leftbar"> <p class="leftbar">
The rest of this section will assume that you are using some variant of the Feel free to modify the `Makefile` to suit your obfuscated
[example Makefile](https://github.com/ioccc-src/temp-test-ioccc/blob/master/next/Makefile.example), needs.
renamed as `Makefile` of course. </p>
<p class="leftbar">
The rest of this section and its subsections will assume that you are using some
variant of the example `Makefile`, again renamed as `Makefile`.
</p> </p>
<p class="leftbar"> <p class="leftbar">
@@ -663,23 +691,49 @@ We suggest that you compile your submission with a commonly available
`-std=gnu17` (ISO C 2017 with GNU extensions) C compiler. `-std=gnu17` (ISO C 2017 with GNU extensions) C compiler.
</p> </p>
<div id="flags">
## Default compiler flags
</div>
<p class="leftbar"> <p class="leftbar">
Unless you **clearly state** otherwise in your `remarks.md` file **AND** put in your Unless you **clearly state** otherwise in your `remarks.md` file **AND** put in your
submission's `Makefile`, we **will** compile using `-std=gnu17 -O3 -g3`. submission's `Makefile`, we **will** compile using `-std=gnu17 -O3 -g3`!
</p> </p>
<p class="leftbar"> <p class="leftbar">
It is **OK** to require your submission to not be compiled It **is OK** if you need to require your submission to **not be** compiled
using the default `-std=gnu17 -O3 -g3` settings. Simply **explain why** using the default `-std=gnu17 -O3 -g3` settings. Simply **explain why**
your submission should not be compiled using `-std=gnu17 -O3 -g3` in your submission should not be compiled using `-std=gnu17 -O3 -g3` in
your `remarks.md` file and adjust your `Makefile` accordingly. your `remarks.md` file **and** adjust your `Makefile` accordingly.
</p> </p>
<p class="leftbar">
An example reason is that the optimiser is known to break some programs, but
there are certainly other possible valid reasons. Again, just update the
`Makefile` and explain it in your `remarks.md`.
</p>
<div id="compilers">
## Default compiler
</div>
<p class="leftbar"> <p class="leftbar">
**IMPORTANT NOTE**: The use of `-std=gnu17` does **NOT** imply the use of the `gcc` **IMPORTANT NOTE**: The use of `-std=gnu17` does **NOT** imply the use of the `gcc`
compiler! We often start by compiling using the **clang** C compiler instead. compiler! We often start by compiling using the **clang** C compiler instead.
</p> </p>
<p class="leftbar">
**PLEASE NOTE**: in macOS, the compiler `gcc` found at `/usr/bin/gcc` is
in truth the `clang` compiler, as `/usr/bin/gcc --version` will show!
</p>
<div id="cstd">
<div id="standard">
## C standard
</div>
</div>
<p class="leftbar"> <p class="leftbar">
You may change the standard under which your submission is compiled You may change the standard under which your submission is compiled
by modifying the `CSTD` Makefile variable. For example, to use `c17` instead: by modifying the `CSTD` Makefile variable. For example, to use `c17` instead:
@@ -690,6 +744,24 @@ by modifying the `CSTD` Makefile variable. For example, to use `c17` instead:
CSTD= -std=c17 CSTD= -std=c17
``` ```
<div id="opt">
## Default optimisation level
</div>
<p class="leftbar">
You may change the level of optimization and compiler debug level
that your submission is compiled with, by modifying the `OPT` Makefile variable.
For example, to compile without optimization and with debug symbols:
</p>
``` <!---make-->
OPT= -O0 -g3
```
<div id="warnings">
## Compiler warnings
</div>
<p class="leftbar"> <p class="leftbar">
For compilers, such as `clang`, that have the `-Weverything` option, For compilers, such as `clang`, that have the `-Weverything` option,
while you may wish to try it, you should read our while you may wish to try it, you should read our
@@ -701,14 +773,14 @@ other version might!
</p> </p>
<p class="leftbar"> <p class="leftbar">
You may change the level of optimization and compiler debug level On the other hand, if `${CC}` has "`clang`" in the name, the example `Makefile` will
that your submission is compiled with, by modifying the `OPT` Makefile variable. automatically enable `-Weverything`, so you might have to use `-Wno-foo`
For example, to compile without optimization and debug symbols: options, as detailed below.
</p> </p>
``` <!---make--> <div id="disabling-warnings">
OPT= -O0 -g3 ## Disabling warnings
``` </div>
<p class="leftbar"> <p class="leftbar">
There is no real penalty for compiler warnings. Sometimes There is no real penalty for compiler warnings. Sometimes
@@ -727,7 +799,7 @@ more strict ` -Wall -Wextra -pedantic` mode:
``` ```
<p class="leftbar"> <p class="leftbar">
The two previous guidelines may be thought by some as being somewhat The two previous guidelines might be thought by some as being somewhat
contradictory. Isn't life, and isn't trying to satisfy "contradictory customer contradictory. Isn't life, and isn't trying to satisfy "contradictory customer
requirements" all too often like that? :-) Try to minimize warnings if you requirements" all too often like that? :-) Try to minimize warnings if you
can. can.
@@ -750,13 +822,20 @@ about this, though it might be worth pointing out (see below for an example).
</p> </p>
<p class="leftbar"> <p class="leftbar">
Additionally: some compilers like to warn about certain use of `char *`s which Some compilers like to warn about certain use of `char *`s which
is not only dubious itself, but it obviously can't (always) be avoided, so you might not only be dubious itself, but it obviously can't (always) be avoided, so you
should not worry about this either; this is the warning should not worry about this either; this is the warning
`-Wno-unsafe-buffer-usage`. See also the `-Wunsafe-buffer-usage` and the way to disable it is `-Wno-unsafe-buffer-usage`. See also the
FAQ on "[forced warnings](../faq.html#forced_warnings)" FAQ on "[forced warnings](../faq.html#forced_warnings)"
and the and the
FAQ on "[`-Weverything`](../faq.html#weverything)". FAQ on "[-Weverything](../faq.html#weverything)".
</p>
<p class="leftbar">
If you do have to disable warnings due to `-Weverything` automatically being
included, you might wish to state this fact. :-)
And even without `-Weverything` there can be warnings, as noted above.
</p> </p>
<p class="leftbar"> <p class="leftbar">
@@ -769,11 +848,6 @@ reason that is what you intend to happen in which case document that too in your
`remarks.md` file. :-) `remarks.md` file. :-)
</p> </p>
<p class="leftbar">
**PLEASE NOTE**: in macOS, the compiler `gcc` found at `/usr/bin/gcc` is
in truth the `clang` compiler, as `/usr/bin/gcc --version` will show!
</p>
All other things being equal, a program that must turn off fewer All other things being equal, a program that must turn off fewer
warnings will be considered better, for certain values of better. warnings will be considered better, for certain values of better.
@@ -813,6 +887,10 @@ such a compiler you might want to not add it, or at least note in your
`remarks.md` the OS, OS version and compiler that this shows up. `remarks.md` the OS, OS version and compiler that this shows up.
</p> </p>
<div id="macros">
## Defining macros in the Makefile
</div>
<p class="leftbar"> <p class="leftbar">
If you need to define something on the compile line, use If you need to define something on the compile line, use
the `CDEFINE` Makefile variable. For example: the `CDEFINE` Makefile variable. For example:
@@ -822,9 +900,13 @@ the `CDEFINE` Makefile variable. For example:
CDEFINE= -Dfoo -Dbar=baz CDEFINE= -Dfoo -Dbar=baz
``` ```
<div id="include">
## Include files in the Makefile
</div>
<p class="leftbar"> <p class="leftbar">
If you need to include a file on the command line, use If you need to include a file (as in `#include`) on the command line, use the
the `CINCLUDE` Makefile variable. For example: `CINCLUDE` Makefile variable. For example:
</p> </p>
``` <!---make--> ``` <!---make-->
@@ -832,6 +914,10 @@ the `CINCLUDE` Makefile variable. For example:
``` ```
<div id="magic">
## Magic in the Makefile
</div>
<p class="leftbar"> <p class="leftbar">
If you need to add other "**magic**" flags to your compile line, If you need to add other "**magic**" flags to your compile line,
use the `COTHER` Makefile variable. For example: use the `COTHER` Makefile variable. For example:
@@ -860,7 +946,7 @@ Jump to: [top](#)
<p class="leftbar"> <p class="leftbar">
We **LIKE** submissions that use an edited variant of the We **LIKE** submissions that use an edited variant of the
[example Makefile](https://github.com/ioccc-src/temp-test-ioccc/blob/master/next/Makefile.example), example Makefile, as described in the [Makefile section](#makefile),
renamed as `Makefile` of course. This makes it easier for the [IOCCC Judges](../judges.html) renamed as `Makefile` of course. This makes it easier for the [IOCCC Judges](../judges.html)
to test your submission. And if your submissions wins, it makes it easier to integrate it into to test your submission. And if your submissions wins, it makes it easier to integrate it into
the [Official IOCCC winner website](https://www.ioccc.org/index.html). the [Official IOCCC winner website](https://www.ioccc.org/index.html).
@@ -868,18 +954,27 @@ the [Official IOCCC winner website](https://www.ioccc.org/index.html).
<p class="leftbar"> <p class="leftbar">
We **LIKE** submissions that use an edited version of the We **LIKE** submissions that use an edited version of the
[try.sh](try.sh) example script (and if you have alternate code, `try.sh` example script (and if you have alternate code,
the same applies with the [try.alt.sh](try.alt.sh) the same applies with the `try.alt.sh` script):
example script). Of course, it is quite possible that only one invocation is </p>
- <p class="leftbar">[view example try.sh](%%REPO_URL%%/next/try.sh)</p>
- <p class="leftbar"><a href="try.sh">download example try.sh</a></p>
- <p class="leftbar">[view example try.alt.sh](%%REPO_URL%%/next/try.alt.sh)</p>
- <p class="leftbar"><a href="try.alt.sh">download example try.alt.sh</a></p>
<p class="leftbar">
Of course, it is quite possible that only one invocation is
possible, so it is not necessarily detrimental to your submission if you do not possible, so it is not necessarily detrimental to your submission if you do not
include one, though we do like interesting and creative uses of submissions. See include one, though we do like interesting and creative uses of submissions. See
also the also the
FAQ on "[submitting try.sh and try.alt.sh scripts](../faq.html#try_scripts)".
</p> </p>
<p class="leftbar"> <p class="leftbar">
You might wish to add `./try.sh`, and if you have alternate code, You might wish to add `./try.sh` to the `try` rule in the Makefile you submit.
`./try.alt.sh`, to the `try` rule in the Makefile you submit. See also the If you have alternate code, then you could add a `try.alt` rule or something
FAQ on "[submitting try.sh and try.alt.sh scripts](../faq.html#try_scripts)". like that.
</p> </p>
Doing masses of `#define`s to obscure the source has become 'old'. We Doing masses of `#define`s to obscure the source has become 'old'. We
@@ -1160,9 +1255,9 @@ is NOT the smallest C source file that when compiled and run, dumps core:
``` ```
<p class="leftbar"> <p class="leftbar">
Unless you specify `-fwritable-strings` (see `COTHER` in the [example Unless you specify `-fwritable-strings` (see `COTHER` in the example
Makefile](https://github.com/ioccc-src/temp-test-ioccc/blob/master/next/Makefile.example)) Makefile, described in the [Makefile section](#makefile)), do not assume this
do not assume this sort of code will work: sort of code will work:
</p> </p>
``` <!---c--> ``` <!---c-->
@@ -1425,8 +1520,9 @@ CPU, we might just try your submission on that emulator as well :-)
<p class="leftbar"> <p class="leftbar">
If your submission **MUST** run only on a 64-bit or 32-bit architecture, If your submission **MUST** run only on a 64-bit or 32-bit architecture,
then you **MUST** specify the `-arch` on your command line then you **MUST** specify the `-arch` on your command line
(see `ARCH` in the [example (see `ARCH` in the example
Makefile](https://github.com/ioccc-src/temp-test-ioccc/blob/master/next/Makefile.example)). Do not assume a processor word size without specifying `-arch`. For example: Makefile, described in [Makefile section](#makefile)). Do not assume a
processor word size without specifying `-arch`. For example:
</p> </p>
``` <!---make--> ``` <!---make-->
next/rules.html
+5 -4
View File
@@ -466,7 +466,7 @@ writing by <a href="../contact.html">contacting the judges</a>.</p>
</div> </div>
<p>Jump to: <a href="#">top</a></p> <p>Jump to: <a href="#">top</a></p>
<p class="leftbar"> <p class="leftbar">
These <a href="rules.html">IOCCC rules</a> are version <strong>28.11 2024-12-01</strong>. These <a href="rules.html">IOCCC rules</a> are version <strong>28.12 2024-12-05</strong>.
</p> </p>
<p><strong>IMPORTANT</strong>: Be sure to read the <a href="guidelines.html">IOCCC guidelines</a>.</p> <p><strong>IMPORTANT</strong>: Be sure to read the <a href="guidelines.html">IOCCC guidelines</a>.</p>
<p>Jump to: <a href="#">top</a></p> <p>Jump to: <a href="#">top</a></p>
@@ -905,7 +905,7 @@ those requirements.
<p class="leftbar"> <p class="leftbar">
The <code>Makefile</code> <strong>MUST</strong> be a <strong>non</strong>-empty file in <strong><a href="https://www.gnu.org/software/make/manual/make.html">GNU The <code>Makefile</code> <strong>MUST</strong> be a <strong>non</strong>-empty file in <strong><a href="https://www.gnu.org/software/make/manual/make.html">GNU
Makefile</a></strong> form. See the Makefile</a></strong> form. See the
<a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/next/Makefile.example">Makefile.example</a>, <a href="guidelines.html#makefile">Makefile section in the guidelines</a>,
the the
FAQ on “<a href="../faq.html#submission_makefiles">submission Makefile</a>” FAQ on “<a href="../faq.html#submission_makefiles">submission Makefile</a>”
and the and the
@@ -1092,8 +1092,9 @@ make(1) compatibility the IOCCC
supports</a> for more details.</p> supports</a> for more details.</p>
<p class="leftbar"> <p class="leftbar">
You are <strong>ENCOURAGED</strong> to use You are <strong>ENCOURAGED</strong> to use
<a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/next/Makefile.example">Makefile.example</a>, Makefile example, renamed as <code>Makefile</code> of course, for help in constructing your
renamed as <code>Makefile</code> of course, for help in constructing your <code>Makefile</code>. <code>Makefile</code>. See the <a href="guidelines.html#makefile">Makefile section</a> in the
guidelines for more details.
</p> </p>
<p>The target of the Makefile must be called <code>prog</code>. The original <p>The target of the Makefile must be called <code>prog</code>. The original
C source file must be called <code>prog.c</code>.</p> C source file must be called <code>prog.c</code>.</p>
next/rules.md
+6 -5
View File
@@ -57,7 +57,7 @@ Jump to: [top](#)
Jump to: [top](#) Jump to: [top](#)
<p class="leftbar"> <p class="leftbar">
These [IOCCC rules](rules.html) are version **28.11 2024-12-01**. These [IOCCC rules](rules.html) are version **28.12 2024-12-05**.
</p> </p>
**IMPORTANT**: Be sure to read the [IOCCC guidelines](guidelines.html). **IMPORTANT**: Be sure to read the [IOCCC guidelines](guidelines.html).
@@ -595,7 +595,7 @@ It is generated by the `mkiocccentry(1)` tool.
You submission may have additional files, however the filenames of those additional files **MUST**: You submission may have additional files, however the filenames of those additional files **MUST**:
</p> </p>
* <p class="leftbar"> Be less than **100** characters in length.</p> * <p class="leftbar">Be less than **100** characters in length.</p>
* <p class="leftbar">Match the regular expression: * <p class="leftbar">Match the regular expression:
`^[0-9A-Za-z][0-9A-Za-z._+-]*$`</p> `^[0-9A-Za-z][0-9A-Za-z._+-]*$`</p>
@@ -607,7 +607,7 @@ those requirements.
<p class="leftbar"> <p class="leftbar">
The `Makefile` **MUST** be a **non**-empty file in **[GNU The `Makefile` **MUST** be a **non**-empty file in **[GNU
Makefile](https://www.gnu.org/software/make/manual/make.html)** form. See the Makefile](https://www.gnu.org/software/make/manual/make.html)** form. See the
[Makefile.example](https://github.com/ioccc-src/temp-test-ioccc/blob/master/next/Makefile.example), [Makefile section in the guidelines](guidelines.html#makefile),
the the
FAQ on "[submission Makefile](../faq.html#submission_makefiles)" FAQ on "[submission Makefile](../faq.html#submission_makefiles)"
and the and the
@@ -812,8 +812,9 @@ supports](../faq.html#make_compatibility) for more details.
<p class="leftbar"> <p class="leftbar">
You are **ENCOURAGED** to use You are **ENCOURAGED** to use
[Makefile.example](https://github.com/ioccc-src/temp-test-ioccc/blob/master/next/Makefile.example), Makefile example, renamed as `Makefile` of course, for help in constructing your
renamed as `Makefile` of course, for help in constructing your `Makefile`. `Makefile`. See the [Makefile section](guidelines.html#makefile) in the
guidelines for more details.
</p> </p>
The target of the Makefile must be called `prog`. The original The target of the Makefile must be called `prog`. The original