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improve Makefile, README.md, .gitignore, code, bugs.md for 2004/gavin

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Landon Curt Noll committed 2023-03-21 18:20:17 -07:00
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2004/gavin/.gitignore
+4
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@@ -1 +1,5 @@
fs.tar
gavin gavin
kernel
sh
vi
2004/gavin/Makefile
+286 -292
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@@ -1,35 +1,102 @@
#!/bin/make #!/usr/bin/env make
# #
# 2004 makefile # IOCCC 2004 winning entry - gavin
################################################################################
# #
# Copyright (C) 2004, Landon Curt Noll, Simon Cooper, Peter Seebach # Regarding individual entries:
# and Leonid A. Broukhis. All Rights Reserved. Permission for personal, #
# educational or non-profit use is granted provided this copyright and # IOCCC winning entry code may not work on your system. Even with standards,
# notice are included in its entirety and remains unaltered. All other # conditions and build environments change, especially when it comes to more
# uses must receive prior permission from the contest judges. # extreme code such you might find in an IOCCC winner. Moreover, what was
# allowed and liked in one IOCCC contest may no longer be liked/allowed in
# later IOCCC years.
#
# Corrections on winning author and fixing typos in remarks are VERY WELCOME.
#
# GitHub pull requests are welcome:
#
# If you have a patch that might make running an entry work in modern Unix-like
# environments, please create a GitHub pull request for the IOCCC judges to
# consider.
#
# Suggestions and corrections regarding Makefiles, winning author information,
# fixing typos in remarks, and code patches are welcome via opening a GitHub
# issue or better yet, by creating a GitHub pull request for the IOCCC judges
# to consider. To form a GitHub issue or GitHub pull, please visit:
#
# https://github.com/ioccc-src/winner
#
################################################################################
# This work by Landon Curt Noll and Leonid A. Broukhis is licensed under:
#
# Creative Commons Attribution-ShareAlike 3.0 Unported License.
#
# See: http://creativecommons.org/licenses/by-sa/3.0/
# tool locations #############################
# shell used by this Makefile
#############################
# #
SHELL= /bin/sh SHELL= bash
CP= cp
CPP= cpp
GUNZIP= gunzip
LD= ld
MAKE= make
RM= rm
SED= sed
TAR= tar
TRUE= true
#######################
# common tool locations
#######################
#
include ../../var.mk
# Special flags for the gavin entry # Set X11_LIBDIR to the directory where the X11 library resides
# #
# FYI: Older versions of GCC have a bug in -O2 optimization, hence -O1 #X11_LIBDIR= /usr/X11R6/lib
#X11_LIBDIR= /usr/X11/lib
X11_LIBDIR= /opt/X11/lib
# Set X11_INCLUDEDIR to the directory where the X11 include files reside
# #
GAVIN_OPT= -O1 #X11_INCDIR= /usr/X11R6/include
GAVIN_FLAGS=\ #X11_INCDIR= /usr/X11/include
'-DY(m)=*((int*)(m))'\ X11_INCDIR= /opt/X11/include
# Common C compiler warnings to silence
#
#CSILENCE=
CSILENCE= -Wno-bitwise-conditional-parentheses -Wno-bitwise-op-parentheses \
-Wno-constant-conversion -Wno-error -Wno-implicit-function-declaration \
-Wno-int-to-pointer-cast -Wno-parentheses -Wno-pointer-to-int-cast \
-Wno-return-type -Wno-unused-parameter -Wno-unused-variable
# Common C compiler warning flags
#
#CWARN= ${CSILENCE}
#CWARN= -Wall ${CSILENCE}
#CWARN= -Wall -Wextra ${CSILENCE}
CWARN= -Wall -Wextra -pedantic ${CSILENCE}
# Compiler standard
#
#CSTD=
#CSTD= -ansi
CSTD= -std=gnu99
# Compiler bit architecture
#
# Some entries require 32-bitness:
# ARCH= -m32
#
# Some entries require 64-bitness:
# ARCH= -m64
#
# By default we assume nothing:
#
ARCH=
# Defines that are needed to compile
#
#CDEFINE=
CDEFINE= '-DY(m)=*((int*)(m))' \
'-DE(f,a,b,c)=((G((*)))(f))(a,b,c)' \ '-DE(f,a,b,c)=((G((*)))(f))(a,b,c)' \
'-DM=for(D=0;D<786432;D++)' \ '-DM=for(D=0;D<786432;D++)' \
'-DZ=int i=0,j=0,h,n,p=393728,s=26739,C,D' \ '-DZ=int i=0,j=0,h,n,p=393728,s=26739,C,D' \
@@ -38,325 +105,252 @@ GAVIN_FLAGS=\
'-DR=while((C=E(V-8,100,0,0))&3&&(D=E(V-8,96,0,0))|3){' \ '-DR=while((C=E(V-8,100,0,0))&3&&(D=E(V-8,96,0,0))|3){' \
'-DL(c,d)=E(V+8,100,c,0);R}E(V+8,96,d,0);R}' '-DL(c,d)=E(V+8,100,c,0);R}E(V+8,96,d,0);R}'
# Include files that are needed to compile
# Set X11_LIBDIR to the directory where the X11 library resides
# #
X11_LIBDIR= /usr/X11R6/lib CINCLUDE=
#CINCLUDE= -include stdlib.h
#CINCLUDE= -include stdio.h
#CINCLUDE= -include stdlib.h -include stdio.h
#CINCLUDE= -I ${X11_INCDIR} -I ${X11_INCDIR}/X11
#CINCLUDE= `${SDL2_CONFIG} --cflags`
#CINCLUDE= -I ${HOMEBREW_PREFIX}/include/SDL2 # Optimization
# optimization
# #
# Most compiles will safely use -O2. Some can use only -O1 or -O. # Most compiles will safely use -O2. Some can use only -O1 or -O.
# A few compilers have broken optimizers and thus you may # A few compilers have broken optimizers or this entry make break
# not want anything. # under those buggy optimizers and thus you may not want anything.
# Reasonable compilers will allow for -O3.
# #
#OPT= #OPT=
#OPT= -O #OPT= -O
#OPT= -O1 OPT= -O1
OPT= -O2 #OPT= -O2
#OPT= -O3
# Default flags for ANSI C compilation
#
CFLAGS= ${CSTD} ${CWARN} ${ARCH} ${CDEFINE} ${CINCLUDE} ${OPT}
# flags for ANSI compiles # Libraries needed to build
# #
# NOTE: Some ANSI compilers make use of -Xa to turn on ANSI mode, LIBS=
# others such as gcc may want -ansi, others (Compaq Tru64 Unix) #LIBS= -lm
# want -std1, and others may want nothing at all. #LIBS= -L ${X11_LIBDIR} -lX11
# Adjust the CFLAGS line as needed. #LIBS= `${SDL2_CONFIG} --libs`
#
# NOTE: Some compilers cannot optimize, or optimize some entries
# incorrectly. You might want to turn on -O to see if your
# compiler can handle them.
#
#
#CFLAGS= -Xa ${OPT}
#CFLAGS= -std1 $(OPT)
CFLAGS= -ansi ${OPT}
# C compiler to use
# ANSI compiler
#
# Set CC to the name of your ANSI compiler.
#
# Some entries seem to need gcc. If you have gcc, set
# both CC and MAY_NEED_GCC to gcc.
#
# If you do not have gcc, set CC to the name of your ANSI compiler, and
# set MAY_NEED_GCC to either ${CC} (and hope for the best) or to just :
# to disable such programs.
# #
CC= cc CC= cc
MAY_NEED_GCC= gcc #CC=clang
#CC=gcc
# Compiler add-ons or replacements for clang only
# 2004 winners
# #
WINNERS= anonymous arachnid burley gavare gavin hibachi hoyle jdalbec \ ifeq ($(CC),clang)
kopczynski newbern omoikane schnitzi sds vik1 vik2
CLEAN= anonymous_clean arachnid_clean burley_clean gavare_clean gavin_clean \
hibachi_clean hoyle_clean jdalbec_clean kopczynski_clean \
newbern_clean omoikane_clean schnitzi_clean sds_clean vik1_clean \
vik2_clean
CLOBBER= anonymous_clobber arachnid_clobber burley_clobber gavare_clobber \
gavin_clobber hibachi_clobber hoyle_clobber jdalbec_clobber \
kopczynski_clobber newbern_clobber omoikane_clobber schnitzi_clobber \
sds_clobber vik1_clobber vik2_clobber
ALT_NAMES= hoyle.orig kopczynski.orig
DATA_FILES= arachnid_files gavin_files hibachi_files kopczynski_files \
newbern_files omoikane_files schnitzi_files
# default build
# #
all: ${WINNERS} CSILENCE+= -Wno-comma -Wno-implicit-int-conversion -Wno-missing-prototypes \
-Wno-poison-system-directories
# Best use of "Precious" Lines
# #
anonymous: anonymous.c CWARN+= -Weverything
${CC} anonymous.c -o anonymous
anonymous_clean:
${RM} -f anonymous.o
anonymous_clobber: anonymous_clean
${RM} -f anonymous
# Best use of Vision
# #
arachnid: arachnid.c endif
${CC} -o arachnid -DL=LINES -DS=COLS \
-DW=mvwaddch\(w,v,u,acs_map\[l\[m\[u arachnid.c -lncurses
arachnid_clean: # Specific add-ons or replacements for gcc only
${RM} -f arachnid.o
arachnid_clobber: arachnid_clean
${RM} -f arachnid
arachnid_files: arachnid.info
# Best Calculated Risk
# #
burley: burley.c ifeq ($(CC),gcc)
${CC} -ansi burley.c -o burley
burley_clean:
${RM} -f burley.o
burley_clobber: burley_clean
${RM} -f burley
# Best Use of Light and Spheres
# #
gavare: gavare.c #CSILENCE+=
${CC} -O3 gavare.c -o gavare
gavare_clean:
${RM} -f gavare.o
gavare_clobber: gavare_clean
${RM} -f gavare
# Best of Show
# #
gavin: gavin.c #CWARN+=
${CC} ${GAVIN_OPT} -o gavin ${GAVIN_FLAGS} gavin.c
${RM} -f kernel
./gavin > kernel
${CC} ${GAVIN_OPT} -c ${GAVIN_FLAGS} -DB=_start '-Dputchar(a)=' gavin.c
${RM} -f sh
${LD} -s -o sh gavin.o
${RM} -f vi
${CP} sh vi
${RM} -f fs.tar
${TAR} -cvf fs.tar sh vi gavin.c gavin.hint prim
gavin_clean:
${RM} -f sh vi kernel gavin.o
gavin_clobber: gavin_clean
${RM} -f gavin fs.tar
gavin_files: boot.b lilo.conf prim gavin_install.txt
# Best Abuse of the Guidelines
# #
hibachi: hibachi.tar.gz endif
${RM} -f hibachi.tar
${GUNZIP} < hibachi.tar.gz > hibachi.tar
${TAR} -xvf hibachi.tar
${RM} -f hibachi.tar
(cd hibachi && ${SHELL} ./configure)
([ -f hibachi/makefile ] && cd hibachi && $(MAKE) -f makefile || true)
hibachi_clean:
${RM} -f hibachi/hibachi.o hibachi.tar
hibachi_clobber: hibachi_clean
${RM} -rf hibachi
hibachi_files: hibachi.tar.gz
# Most Functional Output ##############################
# Special flags for this entry
##############################
# #
hoyle: hoyle.c ENTRY= gavin
${CC} hoyle.c -o hoyle -lm PROG= ${ENTRY}
hoyle.orig: hoyle.orig.c
${CC} hoyle.orig.c -o hoyle.orig -lm
hoyle_clean:
${RM} -f hoyle.o hoyle.orig.o
hoyle_clobber: hoyle_clean
${RM} -f hoyle hoyle.orig
# Best Abuse of the Periodic Table
# #
jdalbec: jdalbec.c OBJ= ${PROG}.o
@${RM} -f jdalbec2.c DATA= boot.b lilo.conf prim gavin_install.txt
-${CC} -E jdalbec.c > jdalbec2.c TARGET= ${PROG} kernel sh vi fs.tar
@${RM} -f jdalbec3.c
${SED} -e 's/ (/(/g' < jdalbec2.c > jdalbec3.c
${CC} -ansi jdalbec3.c -o jdalbec
jdalbec_clean:
${RM} -f jdalbec2.c jdalbec3.c jdalbec.o
jdalbec_clobber: jdalbec_clean
${RM} -f jdalbec
# Best one-liner
# #
kopczynski: kopczynski.c ALT_OBJ=
${CC} -Dif=while kopczynski.c -o kopczynski ALT_TARGET=
kopczynski.orig: kopczynski.orig.c
${CC} -Dif=while kopczynski.orig.c -o kopczynski.orig
kopczynski_clean:
${RM} -f kopczynski.o kopczynski.orig.o
kopczynski_clobber: kopczynski_clean
${RM} -f kopczynski kopczynski.orig
kopczynski_files: kopczynski-10 kopczynski-11 kopczynski-8a kopczynski-8b \
kopczynski-8c kopczynski-9
# Best Font Engine #################
# build the entry
#################
# #
newbern: newbern.c all: data ${TARGET}
${CC} newbern.c -o newbern @${TRUE}
newbern_clean: .PHONY: all alt data everything clean clobber install \
${RM} -f newbern.o love haste waste maker easter_egg sandwich \
supernova deep_magic magic charon pluto
newbern_clobber: newbern_clean ${PROG}: ${PROG}.c
${RM} -f newbern ${CC} ${CFLAGS} $< -o $@ ${LIBS}
newbern_files: newbern.dat kernel: ${PROG}
${RM} -f $@
./${PROG} > $@
sh: ${PROG}.c
${RM} -f ${PROG}.o
${CC} ${CFLAGS} -DB=_start '-Dputchar(a)=' $< -c
${RM} -f $@
${LD} -static -o $@ ${PROG}.o
# Best Utility vi: sh
${RM} -f $@
${CP} $< $@
fs.tar: sh vi gavin.c README.md prim
${RM} -f $@
${TAR} -cvf $@ sh vi gavin.c README.md prim
# alternative executable
# #
omoikane: omoikane.c alt: data ${ALT_TARGET}
${CC} -O omoikane.c -o omoikane @${TRUE}
omoikane_clean: # data files
${RM} -f omoikane.o
omoikane_clobber: omoikane_clean
${RM} -f omoikane
omoikane_files: omoikane.info
# Best Non-Use of Curses
# #
schnitzi: schnitzi.c data: ${DATA}
${CC} schnitzi.c -o schnitzi @${TRUE}
schnitzi_clean: # both all and alt
${RM} -f schnitzi.o
schnitzi_clobber: schnitzi_clean
${RM} -f schnitzi
schnitzi_files: schnitzi.inp0 schnitzi.inp1
# Best Abuse of Indentation
# #
sds: sds.c everything: all alt
${CC} -o sds sds.c
sds_clean:
${RM} -f sds_encoder.c sds_encoder.o sds.o
sds_clobber: sds_clean
${RM} -f sds sds_encoder
# Best X11 Game
#
vik1: vik1.c
${CC} -ansi -O2 -o vik1 vik1.c -L${X11_LIBDIR} -lX11
vik1_clean:
${RM} -f vik1.o
vik1_clobber: vik1_clean
${RM} -f vik1
# Best Abuse of CPP
#
vik2: vik2.c
@${RM} -f vik2_1.c
${CC} -E '-DSTOP=_5' '-DFNAME="vik2_1.c"' vik2.c > vik2_1.c
@${RM} -f vik2_2.c
${CC} -E vik2_1.c > vik2_2.c
${CC} -O vik2_2.c -o vik2
vik2_clean:
${RM} -f vik2_1.c vik2_2.c vik2.o
vik2_clobber: vik2_clean
${RM} -f vik2
###############
# utility rules # utility rules
###############
# #
everything: ${WINNERS} ${ALT_NAMES} ${DATA_FILES} clean:
${RM} -f ${OBJ} ${ALT_OBJ}
${RM} -f sh vi kernel gavin.o
@-if [ -f indent.c ]; then \
echo ${RM} -f indent.c; \
${RM} -f indent.c; \
fi
clobber: clean
${RM} -f ${TARGET} ${ALT_TARGET}
${RM} -f gavin fs.tar
@-if [ -e sandwich ]; then \
${RM} -f sandwich; \
echo 'ate sandwich'; \
fi
install:
@echo "Dr. Spock says that is not logical!"
@${TRUE}
# you may be able to misunderstand the source by reading indent.c
#
indent.c: ${PROG}.c
@if which "${GINDENT}" >/dev/null 2>&1; then \
echo ${RM} -f $@; \
${RM} -f $@; \
echo "${GINDENT} < $< > $@"; \
${GINDENT} < $< > $@; \
elif which "${INDENT}" >/dev/null 2>&1; then \
echo ${RM} -f $@; \
${RM} -f $@; \
echo "${INDENT} < $< > $@"; \
${INDENT} < $< > $@; \
else \
echo "no intent tool found, ident $< yourself, sorry"; \
echo "exit 1"; \
exit 1; \
fi
##################
# 133t hacker rulz
##################
#
love: love:
@echo 'not war?' @echo 'not war?'
@${TRUE}
haste: haste:
$(MAKE) waste $(MAKE) waste
waste:
@echo 'waste'
clean: ${CLEAN}
${RM} -f a.out core
clobber: ${CLOBBER}
${RM} -f ${WINNERS}
${RM} -f ${ALT_NAMES}
nuke: clobber
@${TRUE} @${TRUE}
install: all waste:
${CAT} ${WINNERS} ${ALT_NAMES} > /dev/null @echo 'haste'
@${TRUE}
maker:
@echo 'Participate in a maker faire'
@${TRUE}
easter_egg:
@echo "you expected to often misunderstand this $${RANDOM} magic"
@echo "chongo '<was here>' /\\oo/\\"
@echo "Eggy"
sandwich: easter_egg
@if [ `id -u` -eq 0 ]; then \
echo 'Okay.'; \
echo "$${RANDOM}`date +%s`$${RANDOM}" > $@; \
else \
echo 'What? Make it yourself.'; \
exit 1; \
fi
# Understand the history of the Homebrew Computer Club
# as well as the West Coast Computer Faire and
# you might be confused different. :-)
#
supernova: sandwich
@-if [ -r .code_anal ]; then \
${RM} -f .code_anal_v6; \
else \
echo "planet deniers, like some members of the IAU, are so cute when they try to defend their logic"; \
fi
@echo "A $@ helps ${MAKE} the elements that help form planets"
@${TRUE}
deep_magic: supernova
@-if [ -r .code_anal ]; then \
ccode_analysis --deep_magic 7889066cdbdf09b0408021754586e895be641cc9be29e7eafd3ca65359541f17 \
--FNV1a_hash_512_bit -v2 "${PROG}" "${PROG}.c"; \
else \
echo "Wrong! Do it again!"; \
sleep 2; \
echo "Wrong! Do it again!"; \
sleep 2; \
echo "Wrong! Do it again!"; \
fi
@${TRUE}
magic: deep_magic
@-if [ -r .code_anal ]; then \
ccode_analysis --level 20003 --mode 5717175 --FNV1a_hash_512_bit -v2 "${PROG}" "${PROG}.c"; \
else \
echo "If you don't eat yer meat, you can't have any pudding!"; \
echo "How can you have any pudding if you don't eat yer meat?!"; \
fi
@${TRUE}
# The IOCCC resident astronomer states
#
charon: magic
@echo "$@ is a dwarf planet"
@echo "dwarf is a type of planet"
@echo "therefore IAU, $@ is a planet"
pluto: charon
${MAKE} charon
@echo "$@ is a dwarf planet"
@echo "dwarf is a type of planet"
@echo "therefore, $@ is a planet"
@echo "having lots of planets is good feature because supernovae can help ${MAKE} a lot of them"
2004/gavin/README.md
+40 -17
View File
@@ -1,4 +1,4 @@
Best of Show: # Best of Show:
Gavin Barraclough Gavin Barraclough
Flat 20, 83 Newton Street, Flat 20, 83 Newton Street,
@@ -7,41 +7,65 @@ Best of Show:
U.K. U.K.
Judges' Comments: # To build:
To build and run (on any platform, without root privileges): ```sh
make
```
make gavin ### To run:
```sh
./prog
```
### Try:
To enjoy the results (on a Linux/x86 machine): To enjoy the results (on a Linux/x86 machine):
```sh
su su
```
# Make a floppy with an ext2 filesystem (mke2fs /dev/fd0), Make a floppy with an ext2 filesystem (mke2fs /dev/fd0), mount it under /mnt/floppy.
# mount it under /mnt/floppy Then:
```sh
cp kernel fs.tar lilo.conf boot.b /mnt/floppy cp kernel fs.tar lilo.conf boot.b /mnt/floppy
```
# If the version of your lilo is not 21.4, use the appropriate boot.b NOTE: If the version of your lilo is not 21.4, use the appropriate boot.b file.
# If your floppy drive is not /dev/fd0, edit lilo.conf appropriately
NOTE: If your floppy drive is not /dev/fd0, edit lilo.conf appropriately.
```sh
lilo -C /mnt/floppy/lilo.conf lilo -C /mnt/floppy/lilo.conf
```
# Boot from the floppy on an x86 machine with a PS/2 keyboard and mouse Boot from the floppy on an x86 machine with a PS/2 keyboard and mouse.
# Move the window away from the corner Move the window away from the corner.
```sh
vi gavin.c vi gavin.c
```
# Scroll the file with up-arrow and down-arrow Scroll the file with up-arrow and down-arrow
```sh
sh sh
```
# Can have several shell windows Can have several shell windows:
```sh
vi gavin.hint vi gavin.hint
prim ./prim
```
# Press and hold any key Press and hold any key.
## Judges' comments:
Over the years, we've seen a program that dumps core Over the years, we've seen a program that dumps core
if executed on a "wrong" architecture immediately (1984/mullender), if executed on a "wrong" architecture immediately (1984/mullender),
@@ -65,8 +89,7 @@ Judges' Comments:
The program called "prim", written by the judges, The program called "prim", written by the judges,
computes and prints prime numbers. computes and prints prime numbers.
## Author's comments:
Selected Author's Comments:
This is a 32-bit multitasking operating system for x86 computers, This is a 32-bit multitasking operating system for x86 computers,
with GUI and filesystem, support for loading and executing user with GUI and filesystem, support for loading and executing user
@@ -95,7 +118,7 @@ Selected Author's Comments:
The filenames 'vi' and 'sh' are significant, and should not be changed. The filenames 'vi' and 'sh' are significant, and should not be changed.
Known 'features'. ### Known 'features'
Known issues are really too plentiful to list. Known issues are really too plentiful to list.
2004/gavin/gavin.c
+3 -2
View File
@@ -1,8 +1,9 @@
int main(int t, char **q, char **d) { return cain(t, (int)q, (int)d); }
#define G(n) int n(int t, int q, int d) #define G(n) int n(int t, int q, int d)
#define X(p,t,s) (p>=t&&p<(t+s)&&(p-(t)&1023)<(s&1023)) #define X(p,t,s) (p>=t&&p<(t+s)&&(p-(t)&1023)<(s&1023))
#define U(m) *((signed char *)(m)) #define U(m) *((signed char *)(m))
#define F if(!--q){ #define F if(!--q){
#define I(s) (int)main-(int)s #define I(s) (int)cain-(int)s
#define P(s,c,k) for(h=0; h>>14==0; h+=129)Y(16*c+h/1024+Y(V+36))&128>>(h&7)?U(s+(h&15367))=k:k #define P(s,c,k) for(h=0; h>>14==0; h+=129)Y(16*c+h/1024+Y(V+36))&128>>(h&7)?U(s+(h&15367))=k:k
G (B) G (B)
@@ -52,7 +53,7 @@ else
G (_); G (_);
G (o); G (o);
G (main) G (cain)
{ {
Z, k = K; Z, k = K;
if (!t) if (!t)
bugs.md
+97 -1
View File
@@ -208,4 +208,100 @@ actually gcc if it looks like it's gcc (two different binaries).
## Entries that can compile but crash (sometimes or always) ## Entries that can compile but crash (sometimes or always)
.. entries to be added later .. ### [2004/gavin](2004/gavin/gavin.c) ([README.md](2004/gavin//README.md))
Segmentation fault occurs when running `gavin` to produce the kernel:
```sh
./gavin > kernel
```
When trying to link `gavin.o` to produce `sh`, the linker generates:
```
Undefined symbols for architecture arm64:
"start", referenced from:
-u command line option
(maybe you meant: __start)
ld: symbol(s) not found for architecture arm64
```
#### Recent for 2004/gavin mods:
In case recent modification are part of the problem, here is a full disclosure
of what was changed:
To compile on modern C compilers, the following patch was applied to `gavin.c`:
```patch
diff --git a/2004/gavin/gavin.c b/2004/gavin/gavin.c
index c967b7e..2082b49 100644
--- a/2004/gavin/gavin.c
+++ b/2004/gavin/gavin.c
@@ -1,8 +1,9 @@
+int main(int t, char **q, char **d) { return cain(t, (int)q, (int)d); }
#define G(n) int n(int t, int q, int d)
#define X(p,t,s) (p>=t&&p<(t+s)&&(p-(t)&1023)<(s&1023))
#define U(m) *((signed char *)(m))
#define F if(!--q){
-#define I(s) (int)main-(int)s
+#define I(s) (int)cain-(int)s
#define P(s,c,k) for(h=0; h>>14==0; h+=129)Y(16*c+h/1024+Y(V+36))&128>>(h&7)?U(s+(h&15367))=k:k
G (B)
@@ -52,7 +53,7 @@ else
G (_);
G (o);
-G (main)
+G (cain)
{
Z, k = K;
if (!t)
``
The original Makefile from 2004 had the following to say about this entry:
```make
# Special flags for the gavin entry
#
# FYI: Older versions of GCC have a bug in -O2 optimization, hence -O1
#
GAVIN_OPT= -O1
GAVIN_FLAGS=\
'-DY(m)=*((int*)(m))'\
'-DE(f,a,b,c)=((G((*)))(f))(a,b,c)'\
'-DM=for(D=0;D<786432;D++)'\
'-DZ=int i=0,j=0,h,n,p=393728,s=26739,C,D'\
'-DV=0x90200'\
'-DK=0'\
'-DR=while((C=E(V-8,100,0,0))&3&&(D=E(V-8,96,0,0))|3){'\
'-DL(c,d)=E(V+8,100,c,0);R}E(V+8,96,d,0);R}'
# ...
# Best of Show
#
gavin: gavin.c
${CC} ${GAVIN_OPT} -o gavin ${GAVIN_FLAGS} gavin.c
${RM} -f kernel
./gavin > kernel
${CC} ${GAVIN_OPT} -c ${GAVIN_FLAGS} -DB=_start '-Dputchar(a)=' gavin.c
${RM} -f sh
${LD} -s -o sh gavin.o
${RM} -f vi
${CP} sh vi
${RM} -f fs.tar
${TAR} -cvf fs.tar sh vi gavin.c gavin.hint prim
gavin_clean:
${RM} -f sh vi kernel gavin.o
gavin_clobber: gavin_clean
${RM} -f gavin fs.tar
gavin_files: boot.b lilo.conf prim gavin_install.txt
```
The current ([Makefile](2004/gavin/Makefile) was modified to try and
fit into the current IOCCC build environment.