FM / bin

/usr/bin

Name	Size	Mode	Actions
aclocal	36478	0755	edit dl rm
aclocal-1.16	36478	0755	edit dl rm
addr2line	34224	0755	edit dl rm
agentxtrap	25128	0755	edit dl rm
animate	12128	0755	edit dl rm
ar	63448	0755	edit dl rm
arch	38232	0755	edit dl rm
arpaname	12104	0755	edit dl rm
as	911264	0755	edit dl rm
aspell	163328	0755	edit dl rm
at	1276	0755	edit dl rm
atq	1278	0755	edit dl rm
atrm	1280	0755	edit dl rm
autoconf	14768	0755	edit dl rm
autoheader	8534	0755	edit dl rm
autom4te	32181	0755	edit dl rm
automake	257949	0755	edit dl rm
automake-1.16	257949	0755	edit dl rm
autoreconf	21066	0755	edit dl rm
autoscan	17124	0755	edit dl rm
autoupdate	33872	0755	edit dl rm
awk	685848	0755	edit dl rm
b2sum	59072	0755	edit dl rm
base32	42464	0755	edit dl rm
base64	42488	0755	edit dl rm
basename	38312	0755	edit dl rm
bash	1154680	0755	edit dl rm
bashbug-64	7348	0755	edit dl rm
batch	137	0755	edit dl rm
bison	448224	0755	edit dl rm
bunzip2	37744	0755	edit dl rm
bzcat	37744	0755	edit dl rm
bzcmp	2128	0755	edit dl rm
bzdiff	2128	0755	edit dl rm
bzgrep	1677	0755	edit dl rm
bzip2	37744	0755	edit dl rm
bzip2recover	16832	0755	edit dl rm
bzless	1259	0755	edit dl rm
bzmore	1259	0755	edit dl rm
c++	1266616	0755	edit dl rm
c++filt	29584	0755	edit dl rm
c89	224	0755	edit dl rm
c99	215	0755	edit dl rm
cagefs_enter.proxied	1296	0755	edit dl rm
cal	67560	0755	edit dl rm
captoinfo	87360	0755	edit dl rm
cat	38360	0755	edit dl rm
catchsegv	3283	0755	edit dl rm
cc	1266576	0755	edit dl rm
chcon	72024	0755	edit dl rm
chgrp	67864	0755	edit dl rm
chmod	63688	0755	edit dl rm
chown	71976	0755	edit dl rm
chrt	38080	0755	edit dl rm
cksum	38288	0755	edit dl rm
cldetect	10593	0755	edit dl rm
clear	12840	0755	edit dl rm
cmp	106248	0755	edit dl rm
col	29704	0755	edit dl rm
colcrt	16872	0755	edit dl rm
colrm	25480	0755	edit dl rm
column	50656	0755	edit dl rm
comm	42560	0755	edit dl rm
compare	12136	0755	edit dl rm
composite	12120	0755	edit dl rm
conjure	12120	0755	edit dl rm
convert	12120	0755	edit dl rm
cp	151568	0755	edit dl rm
cpan	8370	0755	edit dl rm
cpp	1266552	0755	edit dl rm
crontab	1524	0755	edit dl rm
crontab.cagefs	55456	0755	edit dl rm
csplit	54968	0755	edit dl rm
curl	235600	0755	edit dl rm
cut	50704	0755	edit dl rm
date	108496	0755	edit dl rm
dbiprof	6206	0755	edit dl rm
dd	79840	0755	edit dl rm
delv	43480	0755	edit dl rm
df	93272	0755	edit dl rm
diff	274440	0755	edit dl rm
diff3	131688	0755	edit dl rm
dig	166072	0755	edit dl rm
dir	143256	0755	edit dl rm
dircolors	50744	0755	edit dl rm
dirname	34160	0755	edit dl rm
display	12128	0755	edit dl rm
dnstap-read	20920	0755	edit dl rm
du	109568	0755	edit dl rm
easy_install-3	-	0	edit dl rm
echo	38248	0755	edit dl rm
egrep	28	0755	edit dl rm
enc2xs	41958	0755	edit dl rm
enchant	21584	0755	edit dl rm
enchant-lsmod	13408	0755	edit dl rm
env	42344	0755	edit dl rm
eps2eps	639	0755	edit dl rm
eqn	237728	0755	edit dl rm
ex	1180352	0755	edit dl rm
expand	42592	0755	edit dl rm
expr	50760	0755	edit dl rm
factor	88032	0755	edit dl rm
false	34120	0755	edit dl rm
fc-cache	132	0755	edit dl rm
fc-cache-64	20840	0755	edit dl rm
fc-cat	16744	0755	edit dl rm
fc-conflist	12544	0755	edit dl rm
fc-list	12544	0755	edit dl rm
fc-match	16648	0755	edit dl rm
fc-pattern	12552	0755	edit dl rm
fc-query	12536	0755	edit dl rm
fc-scan	12552	0755	edit dl rm
fc-validate	16648	0755	edit dl rm
fgrep	28	0755	edit dl rm
file	25280	0755	edit dl rm
find	228632	0755	edit dl rm
flex	438728	0755	edit dl rm
flex++	438728	0755	edit dl rm
flock	33992	0755	edit dl rm
fmt	46584	0755	edit dl rm
fold	42408	0755	edit dl rm
free	21288	0755	edit dl rm
freetype-config	4416	0755	edit dl rm
funzip	37504	0755	edit dl rm
g++	1266616	0755	edit dl rm
gawk	685848	0755	edit dl rm
gcc	1266576	0755	edit dl rm
gcc-ar	37536	0755	edit dl rm
gcc-nm	37536	0755	edit dl rm
gcc-ranlib	37536	0755	edit dl rm
gcov	1377408	0755	edit dl rm
gcov-dump	584664	0755	edit dl rm
gcov-tool	622360	0755	edit dl rm
gencat	25432	0755	edit dl rm
geoiplookup	22416	0755	edit dl rm
geoiplookup6	22168	0755	edit dl rm
geqn	237728	0755	edit dl rm
GET	16217	0755	edit dl rm
getconf	33240	0755	edit dl rm
getent	33920	0755	edit dl rm
getopt	21024	0755	edit dl rm
ghostscript	12648	0755	edit dl rm
git	3845928	0755	edit dl rm
git-receive-pack	3845928	0755	edit dl rm
git-shell	2236688	0755	edit dl rm
git-upload-archive	3845928	0755	edit dl rm
git-upload-pack	3845928	0755	edit dl rm
gm	8024	0755	edit dl rm
gmake	240968	0755	edit dl rm
gneqn	908	0755	edit dl rm
gnroff	3312	0755	edit dl rm
gpg	1090344	0755	edit dl rm
gpg-agent	429360	0755	edit dl rm
gpg-error	34976	0755	edit dl rm
gpg-zip	3525	0755	edit dl rm
gpgsplit	89112	0755	edit dl rm
gpgv	462344	0755	edit dl rm
gpic	300896	0755	edit dl rm
gprof	105832	0755	edit dl rm
grep	198280	0755	edit dl rm
groff	127920	0755	edit dl rm
grops	195728	0755	edit dl rm
grotty	145304	0755	edit dl rm
groups	38288	0755	edit dl rm
gs	12648	0755	edit dl rm
gsnd	277	0755	edit dl rm
gsoelim	43576	0755	edit dl rm
gtar	459768	0755	edit dl rm
gtbl	158320	0755	edit dl rm
gtroff	824344	0755	edit dl rm
gunzip	2345	0755	edit dl rm
gzexe	6375	0755	edit dl rm
gzip	96944	0755	edit dl rm
h2ph	29382	0755	edit dl rm
h2xs	60866	0755	edit dl rm
head	46592	0755	edit dl rm
hexdump	58888	0755	edit dl rm
host	145704	0755	edit dl rm
hostid	34136	0755	edit dl rm
hostname	21664	0755	edit dl rm
hunspell	148168	0755	edit dl rm
iconv	62904	0755	edit dl rm
id	46528	0755	edit dl rm
identify	12128	0755	edit dl rm
idn	40352	0755	edit dl rm
ifnames	4128	0755	edit dl rm
import	12120	0755	edit dl rm
infocmp	62512	0755	edit dl rm
infotocap	87360	0755	edit dl rm
install	159912	0755	edit dl rm
instmodsh	4194	0755	edit dl rm
ionice	29680	0755	edit dl rm
ipcrm	29688	0755	edit dl rm
ipcs	54680	0755	edit dl rm
isosize	25480	0755	edit dl rm
ispell	988	0755	edit dl rm
join	54984	0755	edit dl rm
kill	38176	0755	edit dl rm
ld	1789080	0755	edit dl rm
ld.bfd	1789080	0755	edit dl rm
ldd	5441	0755	edit dl rm
less	177928	0755	edit dl rm
lessecho	12696	0755	edit dl rm
lesskey	22520	0755	edit dl rm
lesspipe.sh	3143	0755	edit dl rm
lex	438728	0755	edit dl rm
libnetcfg	15775	0755	edit dl rm
libtool	367724	0755	edit dl rm
libtoolize	129197	0755	edit dl rm
link	34136	0755	edit dl rm
ln	72192	0755	edit dl rm
locale	57800	0755	edit dl rm
localedef	314848	0755	edit dl rm
logger	51184	0755	edit dl rm
login	41944	0755	edit dl rm
logname	34144	0755	edit dl rm
look	16856	0755	edit dl rm
ls	143248	0755	edit dl rm
m4	190016	0755	edit dl rm
Magick-config	1460	0755	edit dl rm
MagickCore-config	1596	0755	edit dl rm
MagickWand-config	1597	0755	edit dl rm
Mail	418704	0755	edit dl rm
mail	418704	0755	edit dl rm
mailx	418704	0755	edit dl rm
make	240968	0755	edit dl rm
make-dummy-cert	610	0755	edit dl rm
mariadb	5586328	0755	edit dl rm
mariadb-access	111961	0755	edit dl rm
mariadb-admin	5111488	0755	edit dl rm
mariadb-binlog	5413112	0755	edit dl rm
mariadb-check	5104544	0755	edit dl rm
mariadb-conv	4800544	0755	edit dl rm
mariadb-convert-table-format	4221	0755	edit dl rm
mariadb-dump	5200936	0755	edit dl rm
mariadb-dumpslow	8242	0755	edit dl rm
mariadb-embedded	25435072	0755	edit dl rm
mariadb-find-rows	3290	0755	edit dl rm
mariadb-hotcopy	35359	0755	edit dl rm
mariadb-import	5095200	0755	edit dl rm
mariadb-plugin	4779408	0755	edit dl rm
mariadb-secure-installation	13799	0755	edit dl rm
mariadb-setpermission	17977	0755	edit dl rm
mariadb-show	5093680	0755	edit dl rm
mariadb-slap	5113168	0755	edit dl rm
mariadb-tzinfo-to-sql	4778792	0755	edit dl rm
mariadb-waitpid	4766200	0755	edit dl rm
mc	1360320	0755	edit dl rm
mcdiff	1360320	0755	edit dl rm
mcedit	1360320	0755	edit dl rm
mcookie	34064	0755	edit dl rm
mcview	1360320	0755	edit dl rm
md5sum	46632	0755	edit dl rm
mesg	16752	0755	edit dl rm
mkdir	84680	0755	edit dl rm
mkfifo	68056	0755	edit dl rm
mknod	72160	0755	edit dl rm
mktemp	46760	0755	edit dl rm
mogrify	12120	0755	edit dl rm
montage	12120	0755	edit dl rm
more	46016	0755	edit dl rm
msql2mysql	1446	0755	edit dl rm
mv	147408	0755	edit dl rm
mysql	5586328	0755	edit dl rm
mysqlaccess	111961	0755	edit dl rm
mysqladmin	5111488	0755	edit dl rm
mysqlbinlog	5413112	0755	edit dl rm
mysqlcheck	5104544	0755	edit dl rm
mysqldump	5200936	0755	edit dl rm
mysqlimport	5095200	0755	edit dl rm
mysqlshow	5093680	0755	edit dl rm
mysql_config	4623	0755	edit dl rm
mysql_find_rows	3290	0755	edit dl rm
mysql_waitpid	4766200	0755	edit dl rm
mytop	73757	0755	edit dl rm
my_print_defaults	4770672	0755	edit dl rm
namei	33896	0755	edit dl rm
nano	253888	0755	edit dl rm
neqn	908	0755	edit dl rm
net-snmp-create-v3-user	3223	0755	edit dl rm
nice	38224	0755	edit dl rm
nl	46648	0755	edit dl rm
nm	51584	0755	edit dl rm
nohup	38312	0755	edit dl rm
nproc	38304	0755	edit dl rm
nroff	3312	0755	edit dl rm
nslookup	149768	0755	edit dl rm
nsupdate	74808	0755	edit dl rm
numfmt	67216	0755	edit dl rm
objcopy	245832	0755	edit dl rm
objdump	429832	0755	edit dl rm
od	75576	0755	edit dl rm
openssl	763856	0755	edit dl rm
pango-list	12160	0755	edit dl rm
pango-view	58816	0755	edit dl rm
passwd	1284	0755	edit dl rm
paste	38280	0755	edit dl rm
patch	211416	0755	edit dl rm
pathchk	38224	0755	edit dl rm
pdf2dsc	698	0755	edit dl rm
pdf2ps	909	0755	edit dl rm
perl	12728	0755	edit dl rm
perl5.26.3	12728	0755	edit dl rm
perlbug	45458	0755	edit dl rm
perldoc	118	0755	edit dl rm
perlivp	10813	0755	edit dl rm
perlml	6768	0755	edit dl rm
perlthanks	45458	0755	edit dl rm
pgrep	29536	0755	edit dl rm
php	937	0755	edit dl rm
pic	300896	0755	edit dl rm
piconv	8271	0755	edit dl rm
pinentry	2404	0755	edit dl rm
pinentry-curses	79760	0755	edit dl rm
ping	67712	0755	edit dl rm
pinky	42456	0755	edit dl rm
pip-3	-	0	edit dl rm
pip3	-	0	edit dl rm
pkg-config	41000	0755	edit dl rm
pkgconf	41000	0755	edit dl rm
pkill	29536	0755	edit dl rm
pl2pm	4533	0755	edit dl rm
pmap	33568	0755	edit dl rm
pod2html	4134	0755	edit dl rm
pod2man	15034	0755	edit dl rm
pod2text	10803	0755	edit dl rm
pod2usage	3948	0755	edit dl rm
podchecker	3658	0755	edit dl rm
podselect	2527	0755	edit dl rm
post-grohtml	244456	0755	edit dl rm
pr	84120	0755	edit dl rm
pre-grohtml	133688	0755	edit dl rm
precat	5656	0755	edit dl rm
preunzip	5656	0755	edit dl rm
prezip	5656	0755	edit dl rm
prezip-bin	12264	0755	edit dl rm
printenv	34120	0755	edit dl rm
printf	54848	0755	edit dl rm
prove	13562	0755	edit dl rm
ps	137984	0755	edit dl rm
ps2ascii	631	0755	edit dl rm
ps2epsi	2752	0755	edit dl rm
ps2pdf	272	0755	edit dl rm
ps2pdf12	215	0755	edit dl rm
ps2pdf13	215	0755	edit dl rm
ps2pdf14	215	0755	edit dl rm
ps2pdfwr	1097	0755	edit dl rm
ps2ps	647	0755	edit dl rm
ps2ps2	669	0755	edit dl rm
ptx	79864	0755	edit dl rm
pwd	38320	0755	edit dl rm
pwdx	12984	0755	edit dl rm
pydoc-3	-	0	edit dl rm
pydoc3	-	0	edit dl rm
python2	8032	0755	edit dl rm
python2.7	8032	0755	edit dl rm
python3	11872	0755	edit dl rm
python3.6	11872	0755	edit dl rm
python3.6m	11872	0755	edit dl rm
pyvenv-3	-	0	edit dl rm
ranlib	63456	0755	edit dl rm
raw	16896	0755	edit dl rm
readelf	639528	0755	edit dl rm
readlink	46984	0755	edit dl rm
realpath	51144	0755	edit dl rm
recode	48160	0755	edit dl rm
rename	16896	0755	edit dl rm
renew-dummy-cert	725	0755	edit dl rm
renice	16856	0755	edit dl rm
replace	4748656	0755	edit dl rm
reset	25352	0755	edit dl rm
rev	12760	0755	edit dl rm
rm	72064	0755	edit dl rm
rmdir	46552	0755	edit dl rm
rnano	253888	0755	edit dl rm
run-with-aspell	85	0755	edit dl rm
runcon	38264	0755	edit dl rm
rvi	1180352	0755	edit dl rm
rview	1180352	0755	edit dl rm
rvim	3067744	0755	edit dl rm
scalar	2290912	0755	edit dl rm
scl	37752	0755	edit dl rm
scl_enabled	258	0755	edit dl rm
scl_source	1863	0755	edit dl rm
scp	105304	0755	edit dl rm
script	37680	0755	edit dl rm
sdiff	107856	0755	edit dl rm
sed	118248	0755	edit dl rm
selectorctl	7812	0755	edit dl rm
seq	54728	0755	edit dl rm
setsid	16768	0755	edit dl rm
setterm	46208	0755	edit dl rm
sftp	163576	0755	edit dl rm
sh	1154680	0755	edit dl rm
sha1sum	46640	0755	edit dl rm
sha224sum	46672	0755	edit dl rm
sha256sum	46680	0755	edit dl rm
sha384sum	46688	0755	edit dl rm
sha512sum	46680	0755	edit dl rm
shred	63336	0755	edit dl rm
shuf	59488	0755	edit dl rm
size	34048	0755	edit dl rm
skill	29488	0755	edit dl rm
slabtop	21344	0755	edit dl rm
sleep	38288	0755	edit dl rm
snice	29488	0755	edit dl rm
snmpconf	26051	0755	edit dl rm
soelim	43576	0755	edit dl rm
sort	126432	0755	edit dl rm
spell	122	0755	edit dl rm
splain	19150	0755	edit dl rm
split	59440	0755	edit dl rm
sprof	29360	0755	edit dl rm
sqlite3	1346512	0755	edit dl rm
ssh	775648	0755	edit dl rm
ssh-add	354416	0755	edit dl rm
ssh-agent	333400	0755	edit dl rm
ssh-copy-id	10694	0755	edit dl rm
ssh-keygen	437424	0755	edit dl rm
ssh-keyscan	438800	0755	edit dl rm
stat	88232	0755	edit dl rm
stdbuf	50688	0755	edit dl rm
strace	2029832	0755	edit dl rm
stream	12112	0755	edit dl rm
strings	38328	0755	edit dl rm
strip	245856	0755	edit dl rm
stty	79472	0755	edit dl rm
sum	46624	0755	edit dl rm
sync	38256	0755	edit dl rm
tabs	16952	0755	edit dl rm
tac	42488	0755	edit dl rm
tail	75912	0755	edit dl rm
tar	459768	0755	edit dl rm
taskset	38152	0755	edit dl rm
tbl	158320	0755	edit dl rm
tclsh	9256	0755	edit dl rm
tclsh8.6	9256	0755	edit dl rm
tee	42472	0755	edit dl rm
test	54848	0755	edit dl rm
tic	87360	0755	edit dl rm
timeout	42864	0755	edit dl rm
tload	17160	0755	edit dl rm
tmpwatch	36320	0755	edit dl rm
toe	16848	0755	edit dl rm
top	124616	0755	edit dl rm
touch	96192	0755	edit dl rm
tput	25392	0755	edit dl rm
tr	50816	0755	edit dl rm
troff	824344	0755	edit dl rm
true	34128	0755	edit dl rm
truncate	42352	0755	edit dl rm
tset	25352	0755	edit dl rm
tsort	42488	0755	edit dl rm
tty	34112	0755	edit dl rm
tzselect	15370	0755	edit dl rm
uapi	1280	0755	edit dl rm
ul	21080	0755	edit dl rm
uname	38224	0755	edit dl rm
unexpand	46704	0755	edit dl rm
uniq	50832	0755	edit dl rm
unlink	34144	0755	edit dl rm
unversioned-python	-	0	edit dl rm
unzip	206728	0755	edit dl rm
unzipsfx	103912	0755	edit dl rm
uptime	12888	0755	edit dl rm
users	38288	0755	edit dl rm
utmpdump	29352	0755	edit dl rm
vdir	143256	0755	edit dl rm
vi	1180352	0755	edit dl rm
view	1180352	0755	edit dl rm
vim	3067744	0755	edit dl rm
vimdiff	3067744	0755	edit dl rm
vimtutor	2121	0755	edit dl rm
vmstat	37672	0755	edit dl rm
Wand-config	1455	0755	edit dl rm
watch	29888	0755	edit dl rm
wc	50832	0755	edit dl rm
wget	533928	0755	edit dl rm
whereis	29976	0755	edit dl rm
which	30088	0755	edit dl rm
who	54880	0755	edit dl rm
whoami	34136	0755	edit dl rm
word-list-compress	12280	0755	edit dl rm
x86_64-redhat-linux-c++	1266616	0755	edit dl rm
x86_64-redhat-linux-g++	1266616	0755	edit dl rm
x86_64-redhat-linux-gcc	1266576	0755	edit dl rm
x86_64-redhat-linux-gcc-8	1266576	0755	edit dl rm
xargs	75888	0755	edit dl rm
xmlcatalog	20864	0755	edit dl rm
xmllint	75128	0755	edit dl rm
xmlwf	37848	0755	edit dl rm
xsltproc	29152	0755	edit dl rm
xsubpp	5080	0755	edit dl rm
xxd	21032	0755	edit dl rm
yes	34168	0755	edit dl rm
zcat	1983	0755	edit dl rm
zcmp	1677	0755	edit dl rm
zdiff	5879	0755	edit dl rm
zegrep	29	0755	edit dl rm
zfgrep	29	0755	edit dl rm
zforce	2080	0755	edit dl rm
zgrep	7582	0755	edit dl rm
zip	234496	0755	edit dl rm
zipcloak	105376	0755	edit dl rm
zipgrep	2953	0755	edit dl rm
zipinfo	206728	0755	edit dl rm
zipnote	100104	0755	edit dl rm
zipsplit	100104	0755	edit dl rm
zless	2205	0755	edit dl rm
zmore	1841	0755	edit dl rm
znew	4552	0755	edit dl rm
zsoelim	43576	0755	edit dl rm
[	54864	0755	edit dl rm

Edit: /usr/bin/autom4te (32181B)

#! /usr/bin/perl -w
# -*- perl -*-
# Generated from autom4te.in; do not edit by hand.

eval 'case $# in 0) exec /usr/bin/perl -S "$0";; *) exec /usr/bin/perl -S "$0" "$@";; esac'
    if 0;

# autom4te - Wrapper around M4 libraries.
# Copyright (C) 2001-2003, 2005-2012 Free Software Foundation, Inc.

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

BEGIN
{
  my $pkgdatadir = $ENV{'autom4te_perllibdir'} || '/usr/share/autoconf';
  unshift @INC, $pkgdatadir;

# Override SHELL.  On DJGPP SHELL may not be set to a shell
  # that can handle redirection and quote arguments correctly,
  # e.g.: COMMAND.COM.  For DJGPP always use the shell that configure
  # has detected.
  $ENV{'SHELL'} = '/bin/sh' if ($^O eq 'dos');
}

use Autom4te::C4che;
use Autom4te::ChannelDefs;
use Autom4te::Channels;
use Autom4te::FileUtils;
use Autom4te::General;
use Autom4te::XFile;
use File::Basename;
use strict;

# Data directory.
my $pkgdatadir = $ENV{'AC_MACRODIR'} || '/usr/share/autoconf';

# $LANGUAGE{LANGUAGE} -- Automatic options for LANGUAGE.
my %language;

my $output = '-';

# Mode of the output file except for traces.
my $mode = "0666";

# If melt, don't use frozen files.
my $melt = 0;

# Names of the cache directory, cache directory index, trace cache
# prefix, and output cache prefix.  And the IO object for the index.
my $cache;
my $icache;
my $tcache;
my $ocache;
my $icache_file;

my $flock_implemented = 'yes';

# The macros to trace mapped to their format, as specified by the
# user.
my %trace;

# The macros the user will want to trace in the future.
# We need `include' to get the included file, `m4_pattern_forbid' and
# `m4_pattern_allow' to check the output.
#
# FIXME: What about `sinclude'?
my @preselect = ('include',
		 'm4_pattern_allow', 'm4_pattern_forbid',
		 '_m4_warn');

# M4 include path.
my @include;

# Do we freeze?
my $freeze = 0;

# $M4.
my $m4 = $ENV{"M4"} || '/usr/bin/m4';
# Some non-GNU m4's don't reject the --help option, so give them /dev/null.
fatal "need GNU m4 1.4 or later: $m4"
  if system "$m4 --help </dev/null 2>&1 | grep reload-state >/dev/null";

# Set some high recursion limit as the default limit, 250, has already
# been hit with AC_OUTPUT.  Don't override the user's choice.
$m4 .= ' --nesting-limit=1024'
  if " $m4 " !~ / (--nesting-limit(=[0-9]+)?|-L[0-9]*) /;

# @M4_BUILTIN -- M4 builtins and a useful comment.
my @m4_builtin = `echo dumpdef | $m4 2>&1 >/dev/null`;
map { s/:.*//;s/\W// } @m4_builtin;

# %M4_BUILTIN_ALTERNATE_NAME
# --------------------------
# The builtins are renamed, e.g., `define' is renamed `m4_define'.
# So map `define' to `m4_define' and conversely.
# Some macros don't follow this scheme: be sure to properly map to their
# alternate name too.
#
# FIXME: Trace status of renamed builtins was fixed in M4 1.4.5, which
# we now depend on; do we still need to do this mapping?
#
# So we will merge them, i.e., tracing `BUILTIN' or tracing
# `m4_BUILTIN' will be the same: tracing both, but honoring the
# *last* trace specification.
#
# FIXME: This is not enough: in the output `$0' will be `BUILTIN'
# sometimes and `m4_BUILTIN' at others.  We should return a unique name,
# the one specified by the user.
#
# FIXME: To be absolutely rigorous, I would say that given that we
# _redefine_ divert (instead of _copying_ it), divert and the like
# should not be part of this list.
my %m4_builtin_alternate_name;
@m4_builtin_alternate_name{"$_", "m4_$_"} = ("m4_$_", "$_")
  foreach (grep { !/m4wrap|m4exit|dnl|ifelse|__.*__/ } @m4_builtin);
@m4_builtin_alternate_name{"ifelse", "m4_if"}   = ("m4_if", "ifelse");
@m4_builtin_alternate_name{"m4exit", "m4_exit"} = ("m4_exit", "m4exit");
@m4_builtin_alternate_name{"m4wrap", "m4_wrap"} = ("m4_wrap", "m4wrap");

# $HELP
# -----
$help = "Usage: $0 [OPTION]... [FILES]

Run GNU M4 on the FILES, avoiding useless runs.  Output the traces if tracing,
the frozen file if freezing, otherwise the expansion of the FILES.

If some of the FILES are named \`FILE.m4f\' they are considered to be M4
frozen files of all the previous files (which are therefore not loaded).
If \`FILE.m4f\' is not found, then \`FILE.m4\' will be used, together with
all the previous files.

Some files may be optional, i.e., will only be processed if found in the
include path, but then must end in \`.m4?\';  the question mark is not part of
the actual file name.

Operation modes:
  -h, --help               print this help, then exit
  -V, --version            print version number, then exit
  -v, --verbose            verbosely report processing
  -d, --debug              don\'t remove temporary files
  -o, --output=FILE        save output in FILE (defaults to \`-\', stdout)
  -f, --force              don\'t rely on cached values
  -W, --warnings=CATEGORY  report the warnings falling in CATEGORY
  -l, --language=LANG      specify the set of M4 macros to use
  -C, --cache=DIRECTORY    preserve results for future runs in DIRECTORY
      --no-cache           disable the cache
  -m, --mode=OCTAL         change the non trace output file mode (0666)
  -M, --melt               don\'t use M4 frozen files

Languages include:
  \`Autoconf\'   create Autoconf configure scripts
  \`Autotest\'   create Autotest test suites
  \`M4sh\'       create M4sh shell scripts
  \`M4sugar\'    create M4sugar output

" . Autom4te::ChannelDefs::usage . "

The environment variables \`M4\' and \`WARNINGS\' are honored.

Library directories:
  -B, --prepend-include=DIR  prepend directory DIR to search path
  -I, --include=DIR          append directory DIR to search path

Tracing:
  -t, --trace=MACRO[:FORMAT]  report the MACRO invocations
  -p, --preselect=MACRO       prepare to trace MACRO in a future run

Freezing:
  -F, --freeze   produce an M4 frozen state file for FILES

FORMAT defaults to \`\$f:\$l:\$n:\$%\', and can use the following escapes:
  \$\$     literal \$
  \$f     file where macro was called
  \$l     line where macro was called
  \$d     nesting depth of macro call
  \$n     name of the macro
  \$NUM   argument NUM, unquoted and with newlines
  \$SEP\@  all arguments, with newlines, quoted, and separated by SEP
  \$SEP*  all arguments, with newlines, unquoted, and separated by SEP
  \$SEP%  all arguments, without newlines, unquoted, and separated by SEP
SEP can be empty for the default (comma for \@ and *, colon for %),
a single character for that character, or {STRING} to use a string.

Report bugs to <bug-autoconf\@gnu.org>.
GNU Autoconf home page: <http://www.gnu.org/software/autoconf/>.
General help using GNU software: <http://www.gnu.org/gethelp/>.
";

# $VERSION
# --------
$version =  <<"EOF";
autom4te (GNU Autoconf) 2.69
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+/Autoconf: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>, <http://gnu.org/licenses/exceptions.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by Akim Demaille.
EOF

## ---------- ##
## Routines.  ##
## ---------- ##

# $OPTION
# files_to_options (@FILE)
# ------------------------
# Transform Autom4te conventions (e.g., using foo.m4f to designate a frozen
# file) into a suitable command line for M4 (e.g., using --reload-state).
# parse_args guarantees that we will see at most one frozen file, and that
# if a frozen file is present, it is the first argument.
sub files_to_options (@)
{
  my (@file) = @_;
  my @res;
  foreach my $file (@file)
    {
      my $arg = shell_quote ($file);
      if ($file =~ /\.m4f$/)
	{
	  $arg = "--reload-state=$arg";
	  # If the user downgraded M4 from 1.6 to 1.4.x after freezing
	  # the file, then we ensure the frozen __m4_version__ will
	  # not cause m4_init to make the wrong decision about the
	  # current M4 version.
	  $arg .= " --undefine=__m4_version__"
	    unless grep {/__m4_version__/} @m4_builtin;
	}
      push @res, $arg;
    }
  return join ' ', @res;
}

# load_configuration ($FILE)
# --------------------------
# Load the configuration $FILE.
sub load_configuration ($)
{
  my ($file) = @_;
  use Text::ParseWords;

my $cfg = new Autom4te::XFile ("< " . open_quote ($file));
  my $lang;
  while ($_ = $cfg->getline)
    {
      chomp;
      # Comments.
      next
	if /^\s*(\#.*)?$/;

my @words = shellwords ($_);
      my $type = shift @words;
      if ($type eq 'begin-language:')
	{
	  fatal "$file:$.: end-language missing for: $lang"
	    if defined $lang;
	  $lang = lc $words[0];
	}
      elsif ($type eq 'end-language:')
	{
	  error "$file:$.: end-language mismatch: $lang"
	    if $lang ne lc $words[0];
	  $lang = undef;
	}
      elsif ($type eq 'args:')
	{
	  fatal "$file:$.: no current language"
	    unless defined $lang;
	  push @{$language{$lang}}, @words;
	}
      else
	{
	  error "$file:$.: unknown directive: $type";
	}
    }
}

# parse_args ()
# -------------
# Process any command line arguments.
sub parse_args ()
{
  # We want to look for the early options, which should not be found
  # in the configuration file.  Prepend to the user arguments.
  # Perform this repeatedly so that we can use --language in language
  # definitions.  Beware that there can be several --language
  # invocations.
  my @language;
  do {
    @language = ();
    use Getopt::Long;
    Getopt::Long::Configure ("pass_through", "permute");
    GetOptions ("l|language=s" => \@language);

foreach (@language)
      {
	error "unknown language: $_"
	  unless exists $language{lc $_};
	unshift @ARGV, @{$language{lc $_}};
      }
  } while @language;

# --debug is useless: it is parsed below.
  if (exists $ENV{'AUTOM4TE_DEBUG'})
    {
      print STDERR "$me: concrete arguments:\n";
      foreach my $arg (@ARGV)
	{
	  print STDERR "| $arg\n";
	}
    }

# Process the arguments for real this time.
  my @trace;
  my @prepend_include;
  parse_WARNINGS;
  getopt
    (
     # Operation modes:
     "o|output=s"   => \$output,
     "W|warnings=s" => \&parse_warnings,
     "m|mode=s"     => \$mode,
     "M|melt"       => \$melt,

# Library directories:
     "B|prepend-include=s" => \@prepend_include,
     "I|include=s"         => \@include,

# Tracing:
     # Using a hash for traces is seducing.  Unfortunately, upon `-t FOO',
     # instead of mapping `FOO' to undef, Getopt maps it to `1', preventing
     # us from distinguishing `-t FOO' from `-t FOO=1'.  So let's do it
     # by hand.
     "t|trace=s"     => \@trace,
     "p|preselect=s" => \@preselect,

# Freezing.
     "F|freeze" => \$freeze,

# Caching.
     "C|cache=s" => \$cache,
     "no-cache"  => sub { $cache = undef; },
    );

fatal "too few arguments
Try `$me --help' for more information."
    unless @ARGV;

# Freezing:
  # We cannot trace at the same time (well, we can, but it sounds insane).
  # And it implies melting: there is risk not to update properly using
  # old frozen files, and worse yet: we could load a frozen file and
  # refreeze it!  A sort of caching :)
  fatal "cannot freeze and trace"
    if $freeze && @trace;
  $melt = 1
    if $freeze;

# Names of the cache directory, cache directory index, trace cache
  # prefix, and output cache prefix.  If the cache is not to be
  # preserved, default to a temporary directory (automatically removed
  # on exit).
  $cache = $tmp
    unless $cache;
  $icache = "$cache/requests";
  $tcache = "$cache/traces.";
  $ocache = "$cache/output.";

# Normalize the includes: the first occurrence is enough, several is
  # a pain since it introduces a useless difference in the path which
  # invalidates the cache.  And strip `.' which is implicit and always
  # first.
  @include = grep { !/^\.$/ } uniq (reverse(@prepend_include), @include);

# Convert @trace to %trace, and work around the M4 builtins tracing
  # problem.
  # The default format is `$f:$l:$n:$%'.
  foreach (@trace)
    {
      /^([^:]+)(?::(.*))?$/ms;
      $trace{$1} = defined $2 ? $2 : '$f:$l:$n:$%';
      $trace{$m4_builtin_alternate_name{$1}} = $trace{$1}
	if exists $m4_builtin_alternate_name{$1};
    }

# Work around the M4 builtins tracing problem for @PRESELECT.
  # FIXME: Is this still needed, now that we rely on M4 1.4.5?
  push (@preselect,
	map { $m4_builtin_alternate_name{$_} }
	grep { exists $m4_builtin_alternate_name{$_} } @preselect);

# If we find frozen files, then all the files before it are
  # discarded: the frozen file is supposed to include them all.
  #
  # We don't want to depend upon m4's --include to find the top level
  # files, so we use `find_file' here.  Try to get a canonical name,
  # as it's part of the key for caching.  And some files are optional
  # (also handled by `find_file').
  my @argv;
  foreach (@ARGV)
    {
      if ($_ eq '-')
	{
	  push @argv, $_;
	}
      elsif (/\.m4f$/)
	{
	  # Frozen files are optional => pass a `?' to `find_file'.
	  my $file = find_file ("$_?", @include);
	  if (!$melt && $file)
	    {
	      @argv = ($file);
	    }
	  else
	    {
	      s/\.m4f$/.m4/;
	      push @argv, find_file ($_, @include);
	    }
	}
      else
	{
	  my $file = find_file ($_, @include);
	  push @argv, $file
	    if $file;
	}
    }
  @ARGV = @argv;
}

# handle_m4 ($REQ, @MACRO)
# ------------------------
# Run m4 on the input files, and save the traces on the @MACRO.
sub handle_m4 ($@)
{
  my ($req, @macro) = @_;

# GNU m4 appends when using --debugfile/--error-output.
  unlink ($tcache . $req->id . "t");

# Run m4.
  #
  # We don't output directly to the cache files, to avoid problems
  # when we are interrupted (that leaves corrupted files).
  xsystem ("$m4 --gnu"
	   . join (' --include=', '', map { shell_quote ($_) } @include)
	   . ' --debug=aflq'
	   . (!exists $ENV{'AUTOM4TE_NO_FATAL'} ? ' --fatal-warning' : '')
	   . " --debugfile=" . shell_quote ("$tcache" . $req->id . "t")
	   . join (' --trace=', '', map { shell_quote ($_) } sort @macro)
	   . " " . files_to_options (@ARGV)
	   . " > " . shell_quote ("$ocache" . $req->id . "t"));

# Everything went ok: preserve the outputs.
  foreach my $file (map { $_ . $req->id } ($tcache, $ocache))
    {
      use File::Copy;
      move ("${file}t", "$file")
	or fatal "cannot rename ${file}t as $file: $!";
    }
}

# warn_forbidden ($WHERE, $WORD, %FORBIDDEN)
# ------------------------------------------
# $WORD is forbidden.  Warn with a dedicated error message if in
# %FORBIDDEN, otherwise a simple `error: possibly undefined macro'
# will do.
my $first_warn_forbidden = 1;
sub warn_forbidden ($$%)
{
  my ($where, $word, %forbidden) = @_;
  my $message;

for my $re (sort keys %forbidden)
    {
      if ($word =~ $re)
	{
	  $message = $forbidden{$re};
	  last;
	}
    }
  $message ||= "possibly undefined macro: $word";
  warn "$where: error: $message\n";
  if ($first_warn_forbidden)
    {
      warn <<EOF;
      If this token and others are legitimate, please use m4_pattern_allow.
      See the Autoconf documentation.
EOF
      $first_warn_forbidden = 0;
    }
}

# handle_output ($REQ, $OUTPUT)
# -----------------------------
# Run m4 on the input files, perform quadrigraphs substitution, check for
# forbidden tokens, and save into $OUTPUT.
sub handle_output ($$)
{
  my ($req, $output) = @_;

verb "creating $output";

# Load the forbidden/allowed patterns.
  handle_traces ($req, "$tmp/patterns",
		 ('m4_pattern_forbid' => 'forbid:$1:$2',
		  'm4_pattern_allow'  => 'allow:$1'));
  my @patterns = new Autom4te::XFile ("< " . open_quote ("$tmp/patterns"))->getlines;
  chomp @patterns;
  my %forbidden =
    map { /^forbid:([^:]+):.+$/ => /^forbid:[^:]+:(.+)$/ } @patterns;
  my $forbidden = join ('|', map { /^forbid:([^:]+)/ } @patterns) || "^\$";
  my $allowed   = join ('|', map { /^allow:([^:]+)/  } @patterns) || "^\$";

verb "forbidden tokens: $forbidden";
  verb "forbidden token : $_ => $forbidden{$_}"
    foreach (sort keys %forbidden);
  verb "allowed   tokens: $allowed";

# Read the (cached) raw M4 output, produce the actual result.  We
  # have to use the 2nd arg to have Autom4te::XFile honor the third, but then
  # stdout is to be handled by hand :(.  Don't use fdopen as it means
  # we will close STDOUT, which we already do in END.
  my $out = new Autom4te::XFile;
  if ($output eq '-')
    {
      $out->open (">$output");
    }
  else
    {
      $out->open($output, O_CREAT | O_WRONLY | O_TRUNC, oct ($mode));
    }
  fatal "cannot create $output: $!"
    unless $out;
  my $in = new Autom4te::XFile ("< " . open_quote ($ocache . $req->id));

my %prohibited;
  my $res;
  while ($_ = $in->getline)
    {
      s/\s+$//;
      s/__oline__/$./g;
      s/\@<:\@/[/g;
      s/\@:>\@/]/g;
      s/\@\{:\@/(/g;
      s/\@:\}\@/)/g;
      s/\@S\|\@/\$/g;
      s/\@%:\@/#/g;

$res = $_;

# Don't complain in comments.  Well, until we have something
      # better, don't consider `#include' etc. are comments.
      s/\#.*//
	unless /^\#\s*(if|include|endif|ifdef|ifndef|define)\b/;
      foreach (split (/\W+/))
	{
	  $prohibited{$_} = $.
	    if !/^$/ && /$forbidden/o && !/$allowed/o && ! exists $prohibited{$_};
	}

# Performed *last*: the empty quadrigraph.
      $res =~ s/\@&t\@//g;

print $out "$res\n";
    }

$out->close();

# If no forbidden words, we're done.
  return
    if ! %prohibited;

# Locate the forbidden words in the last input file.
  # This is unsatisfying but...
  $exit_code = 1;
  if ($ARGV[$#ARGV] ne '-')
    {
      my $prohibited = '\b(' . join ('|', keys %prohibited) . ')\b';
      my $file = new Autom4te::XFile ("< " . open_quote ($ARGV[$#ARGV]));

while ($_ = $file->getline)
	{
	  # Don't complain in comments.  Well, until we have something
	  # better, don't consider `#include' etc. to be comments.
	  s/\#.*//
	    unless /^\#(if|include|endif|ifdef|ifndef|define)\b/;

# Complain once per word, but possibly several times per line.
	  while (/$prohibited/)
	    {
	      my $word = $1;
	      warn_forbidden ("$ARGV[$#ARGV]:$.", $word, %forbidden);
	      delete $prohibited{$word};
	      # If we're done, exit.
	      return
		if ! %prohibited;
	      $prohibited = '\b(' . join ('|', keys %prohibited) . ')\b';
	    }
	}
    }
  warn_forbidden ("$output:$prohibited{$_}", $_, %forbidden)
    foreach (sort { $prohibited{$a} <=> $prohibited{$b} } keys %prohibited);
}

## --------------------- ##
## Handling the traces.  ##
## --------------------- ##

# $M4_MACRO
# trace_format_to_m4 ($FORMAT)
# ----------------------------
# Convert a trace $FORMAT into a M4 trace processing macro's body.
sub trace_format_to_m4 ($)
{
  my ($format) = @_;
  my $underscore = $_;
  my %escape = (# File name.
		'f' => '$1',
		# Line number.
		'l' => '$2',
		# Depth.
		'd' => '$3',
		# Name (also available as $0).
		'n' => '$4',
		# Escaped dollar.
		'$' => '$');

my $res = '';
  $_ = $format;
  while ($_)
    {
      # $n -> $(n + 4)
      if (s/^\$(\d+)//)
	{
	  $res .= "\$" . ($1 + 4);
	}
      # $x, no separator given.
      elsif (s/^\$([fldn\$])//)
	{
	  $res .= $escape{$1};
	}
      # $.x or ${sep}x.
      elsif (s/^\$\{([^}]*)\}([@*%])//
	    || s/^\$(.?)([@*%])//)
	{
	  # $@, list of quoted effective arguments.
	  if ($2 eq '@')
	    {
	      $res .= ']at_at([' . ($1 ? $1 : ',') . '], $@)[';
	    }
	  # $*, list of unquoted effective arguments.
	  elsif ($2 eq '*')
	    {
	      $res .= ']at_star([' . ($1 ? $1 : ',') . '], $@)[';
	    }
	  # $%, list of flattened unquoted effective arguments.
	  elsif ($2 eq '%')
	    {
	      $res .= ']at_percent([' . ($1 ? $1 : ':') . '], $@)[';
	    }
	}
      elsif (/^(\$.)/)
	{
	  error "invalid escape: $1";
	}
      else
	{
	  s/^([^\$]+)//;
	  $res .= $1;
	}
    }

$_ = $underscore;
  return '[[' . $res . ']]';
}

# handle_traces($REQ, $OUTPUT, %TRACE)
# ------------------------------------
# We use M4 itself to process the traces.  But to avoid name clashes when
# processing the traces, the builtins are disabled, and moved into `at_'.
# Actually, all the low level processing macros are in `at_' (and `_at_').
# To avoid clashes between user macros and `at_' macros, the macros which
# implement tracing are in `AT_'.
#
# Having $REQ is needed to neutralize the macros which have been traced,
# but are not wanted now.
sub handle_traces ($$%)
{
  my ($req, $output, %trace) = @_;

verb "formatting traces for `$output': " . join (', ', sort keys %trace);

# Processing the traces.
  my $trace_m4 = new Autom4te::XFile ("> " . open_quote ("$tmp/traces.m4"));

$_ = <<'EOF';
  divert(-1)
  changequote([, ])
  # _at_MODE(SEPARATOR, ELT1, ELT2...)
  # ----------------------------------
  # List the elements, separating then with SEPARATOR.
  # MODE can be:
  #  `at'       -- the elements are enclosed in brackets.
  #  `star'     -- the elements are listed as are.
  #  `percent'  -- the elements are `flattened': spaces are singled out,
  #                and no new line remains.
  define([_at_at],
  [at_ifelse([$#], [1], [],
	     [$#], [2], [[[$2]]],
	     [[[$2]][$1]$0([$1], at_shift(at_shift($@)))])])

define([_at_percent],
  [at_ifelse([$#], [1], [],
	     [$#], [2], [at_flatten([$2])],
	     [at_flatten([$2])[$1]$0([$1], at_shift(at_shift($@)))])])

define([_at_star],
  [at_ifelse([$#], [1], [],
	     [$#], [2], [[$2]],
	     [[$2][$1]$0([$1], at_shift(at_shift($@)))])])

# FLATTEN quotes its result.
  # Note that the second pattern is `newline, tab or space'.  Don't lose
  # the tab!
  define([at_flatten],
  [at_patsubst(at_patsubst([[[$1]]], [\\\n]), [[\n\t ]+], [ ])])

define([at_args],    [at_shift(at_shift(at_shift(at_shift(at_shift($@)))))])
  define([at_at],      [_$0([$1], at_args($@))])
  define([at_percent], [_$0([$1], at_args($@))])
  define([at_star],    [_$0([$1], at_args($@))])

EOF
  s/^  //mg;s/\\t/\t/mg;s/\\n/\n/mg;
  print $trace_m4 $_;

# If you trace `define', then on `define([m4_exit], defn([m4exit])' you
  # will produce
  #
  #    AT_define([m4sugar.m4], [115], [1], [define], [m4_exit], <m4exit>)
  #
  # Since `<m4exit>' is not quoted, the outer m4, when processing
  # `trace.m4' will exit prematurely.  Hence, move all the builtins to
  # the `at_' name space.

print $trace_m4 "# Copy the builtins.\n";
  map { print $trace_m4 "define([at_$_], defn([$_]))\n" } @m4_builtin;
  print $trace_m4 "\n";

print $trace_m4 "# Disable them.\n";
  map { print $trace_m4 "at_undefine([$_])\n" } @m4_builtin;
  print $trace_m4 "\n";

# Neutralize traces: we don't want traces of cached requests (%REQUEST).
  print $trace_m4
   "## -------------------------------------- ##\n",
   "## By default neutralize all the traces.  ##\n",
   "## -------------------------------------- ##\n",
   "\n";
  print $trace_m4 "at_define([AT_$_], [at_dnl])\n"
    foreach (sort keys %{$req->macro});
  print $trace_m4 "\n";

# Implement traces for current requests (%TRACE).
  print $trace_m4
    "## ------------------------- ##\n",
    "## Trace processing macros.  ##\n",
    "## ------------------------- ##\n",
    "\n";
  foreach (sort keys %trace)
    {
      # Trace request can be embed \n.
      (my $comment = "Trace $_:$trace{$_}") =~ s/^/\# /;
      print $trace_m4 "$comment\n";
      print $trace_m4 "at_define([AT_$_],\n";
      print $trace_m4 trace_format_to_m4 ($trace{$_}) . ")\n\n";
    }
  print $trace_m4 "\n";

# Reenable output.
  print $trace_m4 "at_divert(0)at_dnl\n";

# Transform the traces from m4 into an m4 input file.
  # Typically, transform:
  #
  # | m4trace:configure.ac:3: -1- AC_SUBST([exec_prefix], [NONE])
  #
  # into
  #
  # | AT_AC_SUBST([configure.ac], [3], [1], [AC_SUBST], [exec_prefix], [NONE])
  #
  # Pay attention that the file name might include colons, if under DOS
  # for instance, so we don't use `[^:]+'.
  my $traces = new Autom4te::XFile ("< " . open_quote ($tcache . $req->id));
  while ($_ = $traces->getline)
    {
      # Trace with arguments, as the example above.  We don't try
      # to match the trailing parenthesis as it might be on a
      # separate line.
      s{^m4trace:(.+):(\d+): -(\d+)- ([^(]+)\((.*)$}
       {AT_$4([$1], [$2], [$3], [$4], $5};
      # Traces without arguments, always on a single line.
      s{^m4trace:(.+):(\d+): -(\d+)- ([^)]*)\n$}
       {AT_$4([$1], [$2], [$3], [$4])\n};
      print $trace_m4 "$_";
    }
  $trace_m4->close;

my $in = new Autom4te::XFile ("$m4 " . shell_quote ("$tmp/traces.m4") . " |");
  my $out = new Autom4te::XFile ("> " . open_quote ($output));

# This is dubious: should we really transform the quadrigraphs in
  # traces?  It might break balanced [ ] etc. in the output.  The
  # consensus seems to be that traces are more useful this way.
  while ($_ = $in->getline)
    {
      # It makes no sense to try to transform __oline__.
      s/\@<:\@/[/g;
      s/\@:>\@/]/g;
      s/\@\{:\@/(/g;
      s/\@:\}\@/)/g;
      s/\@S\|\@/\$/g;
      s/\@%:\@/#/g;
      s/\@&t\@//g;
      print $out $_;
    }
}

# $BOOL
# up_to_date ($REQ)
# -----------------
# Are the cache files of $REQ up to date?
# $REQ is `valid' if it corresponds to the request and exists, which
# does not mean it is up to date.  It is up to date if, in addition,
# its files are younger than its dependencies.
sub up_to_date ($)
{
  my ($req) = @_;

return 0
    if ! $req->valid;

my $tfile = $tcache . $req->id;
  my $ofile = $ocache . $req->id;

# We can't answer properly if the traces are not computed since we
  # need to know what other files were included.  Actually, if any of
  # the cache files is missing, we are not up to date.
  return 0
    if ! -f $tfile || ! -f $ofile;

# The youngest of the cache files must be older than the oldest of
  # the dependencies.
  my $tmtime = mtime ($tfile);
  my $omtime = mtime ($ofile);
  my ($file, $mtime) = ($tmtime < $omtime
			? ($ofile, $omtime) : ($tfile, $tmtime));

# We depend at least upon the arguments.
  my @dep = @ARGV;

# stdin is always out of date.
  if (grep { $_ eq '-' } @dep)
    { return 0 }

# Files may include others.  We can use traces since we just checked
  # if they are available.
  handle_traces ($req, "$tmp/dependencies",
		 ('include'    => '$1',
		  'm4_include' => '$1'));
  my $deps = new Autom4te::XFile ("< " . open_quote ("$tmp/dependencies"));
  while ($_ = $deps->getline)
    {
      chomp;
      my $file = find_file ("$_?", @include);
      # If a file which used to be included is no longer there, then
      # don't say it's missing (it might no longer be included).  But
      # of course, that causes the output to be outdated (as if the
      # time stamp of that missing file was newer).
      return 0
	if ! $file;
      push @dep, $file;
    }

# If $FILE is younger than one of its dependencies, it is outdated.
  return up_to_date_p ($file, @dep);
}

## ---------- ##
## Freezing.  ##
## ---------- ##

# freeze ($OUTPUT)
# ----------------
sub freeze ($)
{
  my ($output) = @_;

# When processing the file with diversion disabled, there must be no
  # output but comments and empty lines.
  my $result = xqx ("$m4"
		    . ' --fatal-warning'
		    . join (' --include=', '', map { shell_quote ($_) } @include)
		    . ' --define=divert'
		    . " " . files_to_options (@ARGV)
		    . ' </dev/null');
  $result =~ s/#.*\n//g;
  $result =~ s/^\n//mg;

fatal "freezing produced output:\n$result"
    if $result;

# If freezing produces output, something went wrong: a bad `divert',
  # or an improper paren etc.
  xsystem ("$m4"
	   . ' --fatal-warning'
	   . join (' --include=', '', map { shell_quote ($_) } @include)
	   . " --freeze-state=" . shell_quote ($output)
	   . " " . files_to_options (@ARGV)
	   . ' </dev/null');
}

## -------------- ##
## Main program.  ##
## -------------- ##

mktmpdir ('am4t');
load_configuration ($ENV{'AUTOM4TE_CFG'} || "$pkgdatadir/autom4te.cfg");
load_configuration ("$ENV{'HOME'}/.autom4te.cfg")
  if exists $ENV{'HOME'} && -f "$ENV{'HOME'}/.autom4te.cfg";
load_configuration (".autom4te.cfg")
  if -f ".autom4te.cfg";
parse_args;

# Freezing does not involve the cache.
if ($freeze)
  {
    freeze ($output);
    exit $exit_code;
  }

# We need our cache directory.  Don't fail with parallel creation.
if (! -d "$cache")
  {
    mkdir "$cache", 0755
      or -d "$cache"
      or fatal "cannot create $cache: $!";
  }

# Open the index for update, and lock it.  autom4te handles several
# files, but the index is the first and last file to be updated, so
# locking it is sufficient.
$icache_file = new Autom4te::XFile $icache, O_RDWR|O_CREAT;
$icache_file->lock (LOCK_EX)
  if ($flock_implemented eq "yes");

# Read the cache index if available and older than autom4te itself.
# If autom4te is younger, then some structures such as C4che might
# have changed, which would corrupt its processing.
Autom4te::C4che->load ($icache_file)
  if -f $icache && mtime ($icache) > mtime ($0);

# Add the new trace requests.
my $req = Autom4te::C4che->request ('input' => \@ARGV,
				    'path'  => \@include,
				    'macro' => [keys %trace, @preselect]);

# If $REQ's cache files are not up to date, or simply if the user
# discarded them (-f), declare it invalid.
$req->valid (0)
  if $force || ! up_to_date ($req);

# We now know whether we can trust the Request object.  Say it.
verb "the trace request object is:\n" . $req->marshall;

# We need to run M4 if (i) the user wants it (--force), (ii) $REQ is
# invalid.
handle_m4 ($req, keys %{$req->macro})
  if $force || ! $req->valid;

# Issue the warnings each time autom4te was run.
my $separator = "\n" . ('-' x 25) . " END OF WARNING " . ('-' x 25) . "\n\n";
handle_traces ($req, "$tmp/warnings",
	       ('_m4_warn' => "\$1::\$f:\$l::\$2::\$3$separator"));
# Swallow excessive newlines.
for (split (/\n*$separator\n*/o, contents ("$tmp/warnings")))
{
  # The message looks like:
  # | syntax::input.as:5::ouch
  # | ::input.as:4: baz is expanded from...
  # | input.as:2: bar is expanded from...
  # | input.as:3: foo is expanded from...
  # | input.as:5: the top level
  # In particular, m4_warn guarantees that either $stackdump is empty, or
  # it consists of lines where only the last line ends in "top level".
  my ($cat, $loc, $msg, $stacktrace) = split ('::', $_, 4);
  msg $cat, $loc, "warning: $msg",
    partial => ($stacktrace =~ /top level$/) + 0;
  for (split /\n/, $stacktrace)
    {
      my ($loc, $trace) = split (': ', $_, 2);
      msg $cat, $loc, $trace, partial => ($trace !~ /top level$/) + 0;
    }
}

# Now output...
if (%trace)
  {
    # Always produce traces, since even if the output is young enough,
    # there is no guarantee that the traces use the same *format*
    # (e.g., `-t FOO:foo' and `-t FOO:bar' are both using the same M4
    # traces, hence the M4 traces cache is usable, but its formatting
    # will yield different results).
    handle_traces ($req, $output, %trace);
  }
else
  {
    # Actual M4 expansion, if the user wants it, or if $output is old
    # (STDOUT is pretty old).
    handle_output ($req, $output)
      if $force || mtime ($output) < mtime ($ocache . $req->id);
  }

# If we ran up to here, the cache is valid.
$req->valid (1);
Autom4te::C4che->save ($icache_file);

exit $exit_code;

### Setup "GNU" style for perl-mode and cperl-mode.
## Local Variables:
## perl-indent-level: 2
## perl-continued-statement-offset: 2
## perl-continued-brace-offset: 0
## perl-brace-offset: 0
## perl-brace-imaginary-offset: 0
## perl-label-offset: -2
## cperl-indent-level: 2
## cperl-brace-offset: 0
## cperl-continued-brace-offset: 0
## cperl-label-offset: -2
## cperl-extra-newline-before-brace: t
## cperl-merge-trailing-else: nil
## cperl-continued-statement-offset: 2
## End:

cmd: